| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * hosting IBM Z kernel virtual machines (s390x) |
| * |
| * Copyright IBM Corp. 2008, 2020 |
| * |
| * Author(s): Carsten Otte <cotte@de.ibm.com> |
| * Christian Borntraeger <borntraeger@de.ibm.com> |
| * Heiko Carstens <heiko.carstens@de.ibm.com> |
| * Christian Ehrhardt <ehrhardt@de.ibm.com> |
| * Jason J. Herne <jjherne@us.ibm.com> |
| */ |
| |
| #define KMSG_COMPONENT "kvm-s390" |
| #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| |
| #include <linux/compiler.h> |
| #include <linux/err.h> |
| #include <linux/fs.h> |
| #include <linux/hrtimer.h> |
| #include <linux/init.h> |
| #include <linux/kvm.h> |
| #include <linux/kvm_host.h> |
| #include <linux/mman.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/random.h> |
| #include <linux/slab.h> |
| #include <linux/timer.h> |
| #include <linux/vmalloc.h> |
| #include <linux/bitmap.h> |
| #include <linux/sched/signal.h> |
| #include <linux/string.h> |
| #include <linux/pgtable.h> |
| |
| #include <asm/asm-offsets.h> |
| #include <asm/lowcore.h> |
| #include <asm/stp.h> |
| #include <asm/gmap.h> |
| #include <asm/nmi.h> |
| #include <asm/switch_to.h> |
| #include <asm/isc.h> |
| #include <asm/sclp.h> |
| #include <asm/cpacf.h> |
| #include <asm/timex.h> |
| #include <asm/ap.h> |
| #include <asm/uv.h> |
| #include "kvm-s390.h" |
| #include "gaccess.h" |
| |
| #define CREATE_TRACE_POINTS |
| #include "trace.h" |
| #include "trace-s390.h" |
| |
| #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
| #define LOCAL_IRQS 32 |
| #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ |
| (KVM_MAX_VCPUS + LOCAL_IRQS)) |
| |
| struct kvm_stats_debugfs_item debugfs_entries[] = { |
| VCPU_STAT("userspace_handled", exit_userspace), |
| VCPU_STAT("exit_null", exit_null), |
| VCPU_STAT("exit_validity", exit_validity), |
| VCPU_STAT("exit_stop_request", exit_stop_request), |
| VCPU_STAT("exit_external_request", exit_external_request), |
| VCPU_STAT("exit_io_request", exit_io_request), |
| VCPU_STAT("exit_external_interrupt", exit_external_interrupt), |
| VCPU_STAT("exit_instruction", exit_instruction), |
| VCPU_STAT("exit_pei", exit_pei), |
| VCPU_STAT("exit_program_interruption", exit_program_interruption), |
| VCPU_STAT("exit_instr_and_program_int", exit_instr_and_program), |
| VCPU_STAT("exit_operation_exception", exit_operation_exception), |
| VCPU_STAT("halt_successful_poll", halt_successful_poll), |
| VCPU_STAT("halt_attempted_poll", halt_attempted_poll), |
| VCPU_STAT("halt_poll_invalid", halt_poll_invalid), |
| VCPU_STAT("halt_no_poll_steal", halt_no_poll_steal), |
| VCPU_STAT("halt_wakeup", halt_wakeup), |
| VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), |
| VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns), |
| VCPU_STAT("instruction_lctlg", instruction_lctlg), |
| VCPU_STAT("instruction_lctl", instruction_lctl), |
| VCPU_STAT("instruction_stctl", instruction_stctl), |
| VCPU_STAT("instruction_stctg", instruction_stctg), |
| VCPU_STAT("deliver_ckc", deliver_ckc), |
| VCPU_STAT("deliver_cputm", deliver_cputm), |
| VCPU_STAT("deliver_emergency_signal", deliver_emergency_signal), |
| VCPU_STAT("deliver_external_call", deliver_external_call), |
| VCPU_STAT("deliver_service_signal", deliver_service_signal), |
| VCPU_STAT("deliver_virtio", deliver_virtio), |
| VCPU_STAT("deliver_stop_signal", deliver_stop_signal), |
| VCPU_STAT("deliver_prefix_signal", deliver_prefix_signal), |
| VCPU_STAT("deliver_restart_signal", deliver_restart_signal), |
| VCPU_STAT("deliver_program", deliver_program), |
| VCPU_STAT("deliver_io", deliver_io), |
| VCPU_STAT("deliver_machine_check", deliver_machine_check), |
| VCPU_STAT("exit_wait_state", exit_wait_state), |
| VCPU_STAT("inject_ckc", inject_ckc), |
| VCPU_STAT("inject_cputm", inject_cputm), |
| VCPU_STAT("inject_external_call", inject_external_call), |
| VM_STAT("inject_float_mchk", inject_float_mchk), |
| VCPU_STAT("inject_emergency_signal", inject_emergency_signal), |
| VM_STAT("inject_io", inject_io), |
| VCPU_STAT("inject_mchk", inject_mchk), |
| VM_STAT("inject_pfault_done", inject_pfault_done), |
| VCPU_STAT("inject_program", inject_program), |
| VCPU_STAT("inject_restart", inject_restart), |
| VM_STAT("inject_service_signal", inject_service_signal), |
| VCPU_STAT("inject_set_prefix", inject_set_prefix), |
| VCPU_STAT("inject_stop_signal", inject_stop_signal), |
| VCPU_STAT("inject_pfault_init", inject_pfault_init), |
| VM_STAT("inject_virtio", inject_virtio), |
| VCPU_STAT("instruction_epsw", instruction_epsw), |
| VCPU_STAT("instruction_gs", instruction_gs), |
| VCPU_STAT("instruction_io_other", instruction_io_other), |
| VCPU_STAT("instruction_lpsw", instruction_lpsw), |
| VCPU_STAT("instruction_lpswe", instruction_lpswe), |
| VCPU_STAT("instruction_pfmf", instruction_pfmf), |
| VCPU_STAT("instruction_ptff", instruction_ptff), |
| VCPU_STAT("instruction_stidp", instruction_stidp), |
| VCPU_STAT("instruction_sck", instruction_sck), |
| VCPU_STAT("instruction_sckpf", instruction_sckpf), |
| VCPU_STAT("instruction_spx", instruction_spx), |
| VCPU_STAT("instruction_stpx", instruction_stpx), |
| VCPU_STAT("instruction_stap", instruction_stap), |
| VCPU_STAT("instruction_iske", instruction_iske), |
| VCPU_STAT("instruction_ri", instruction_ri), |
| VCPU_STAT("instruction_rrbe", instruction_rrbe), |
| VCPU_STAT("instruction_sske", instruction_sske), |
| VCPU_STAT("instruction_ipte_interlock", instruction_ipte_interlock), |
| VCPU_STAT("instruction_essa", instruction_essa), |
| VCPU_STAT("instruction_stsi", instruction_stsi), |
| VCPU_STAT("instruction_stfl", instruction_stfl), |
| VCPU_STAT("instruction_tb", instruction_tb), |
| VCPU_STAT("instruction_tpi", instruction_tpi), |
| VCPU_STAT("instruction_tprot", instruction_tprot), |
| VCPU_STAT("instruction_tsch", instruction_tsch), |
| VCPU_STAT("instruction_sthyi", instruction_sthyi), |
| VCPU_STAT("instruction_sie", instruction_sie), |
| VCPU_STAT("instruction_sigp_sense", instruction_sigp_sense), |
| VCPU_STAT("instruction_sigp_sense_running", instruction_sigp_sense_running), |
| VCPU_STAT("instruction_sigp_external_call", instruction_sigp_external_call), |
| VCPU_STAT("instruction_sigp_emergency", instruction_sigp_emergency), |
| VCPU_STAT("instruction_sigp_cond_emergency", instruction_sigp_cond_emergency), |
| VCPU_STAT("instruction_sigp_start", instruction_sigp_start), |
| VCPU_STAT("instruction_sigp_stop", instruction_sigp_stop), |
| VCPU_STAT("instruction_sigp_stop_store_status", instruction_sigp_stop_store_status), |
| VCPU_STAT("instruction_sigp_store_status", instruction_sigp_store_status), |
| VCPU_STAT("instruction_sigp_store_adtl_status", instruction_sigp_store_adtl_status), |
| VCPU_STAT("instruction_sigp_set_arch", instruction_sigp_arch), |
| VCPU_STAT("instruction_sigp_set_prefix", instruction_sigp_prefix), |
| VCPU_STAT("instruction_sigp_restart", instruction_sigp_restart), |
| VCPU_STAT("instruction_sigp_cpu_reset", instruction_sigp_cpu_reset), |
| VCPU_STAT("instruction_sigp_init_cpu_reset", instruction_sigp_init_cpu_reset), |
| VCPU_STAT("instruction_sigp_unknown", instruction_sigp_unknown), |
| VCPU_STAT("instruction_diag_10", diagnose_10), |
| VCPU_STAT("instruction_diag_44", diagnose_44), |
| VCPU_STAT("instruction_diag_9c", diagnose_9c), |
| VCPU_STAT("diag_9c_ignored", diagnose_9c_ignored), |
| VCPU_STAT("instruction_diag_258", diagnose_258), |
| VCPU_STAT("instruction_diag_308", diagnose_308), |
| VCPU_STAT("instruction_diag_500", diagnose_500), |
| VCPU_STAT("instruction_diag_other", diagnose_other), |
| { NULL } |
| }; |
| |
| struct kvm_s390_tod_clock_ext { |
| __u8 epoch_idx; |
| __u64 tod; |
| __u8 reserved[7]; |
| } __packed; |
| |
| /* allow nested virtualization in KVM (if enabled by user space) */ |
| static int nested; |
| module_param(nested, int, S_IRUGO); |
| MODULE_PARM_DESC(nested, "Nested virtualization support"); |
| |
| /* allow 1m huge page guest backing, if !nested */ |
| static int hpage; |
| module_param(hpage, int, 0444); |
| MODULE_PARM_DESC(hpage, "1m huge page backing support"); |
| |
| /* maximum percentage of steal time for polling. >100 is treated like 100 */ |
| static u8 halt_poll_max_steal = 10; |
| module_param(halt_poll_max_steal, byte, 0644); |
| MODULE_PARM_DESC(halt_poll_max_steal, "Maximum percentage of steal time to allow polling"); |
| |
| /* if set to true, the GISA will be initialized and used if available */ |
| static bool use_gisa = true; |
| module_param(use_gisa, bool, 0644); |
| MODULE_PARM_DESC(use_gisa, "Use the GISA if the host supports it."); |
| |
| /* |
| * For now we handle at most 16 double words as this is what the s390 base |
| * kernel handles and stores in the prefix page. If we ever need to go beyond |
| * this, this requires changes to code, but the external uapi can stay. |
| */ |
| #define SIZE_INTERNAL 16 |
| |
| /* |
| * Base feature mask that defines default mask for facilities. Consists of the |
| * defines in FACILITIES_KVM and the non-hypervisor managed bits. |
| */ |
| static unsigned long kvm_s390_fac_base[SIZE_INTERNAL] = { FACILITIES_KVM }; |
| /* |
| * Extended feature mask. Consists of the defines in FACILITIES_KVM_CPUMODEL |
| * and defines the facilities that can be enabled via a cpu model. |
| */ |
| static unsigned long kvm_s390_fac_ext[SIZE_INTERNAL] = { FACILITIES_KVM_CPUMODEL }; |
| |
| static unsigned long kvm_s390_fac_size(void) |
| { |
| BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_MASK_SIZE_U64); |
| BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_LIST_SIZE_U64); |
| BUILD_BUG_ON(SIZE_INTERNAL * sizeof(unsigned long) > |
| sizeof(S390_lowcore.stfle_fac_list)); |
| |
| return SIZE_INTERNAL; |
| } |
| |
| /* available cpu features supported by kvm */ |
| static DECLARE_BITMAP(kvm_s390_available_cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS); |
| /* available subfunctions indicated via query / "test bit" */ |
| static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc; |
| |
| static struct gmap_notifier gmap_notifier; |
| static struct gmap_notifier vsie_gmap_notifier; |
| debug_info_t *kvm_s390_dbf; |
| debug_info_t *kvm_s390_dbf_uv; |
| |
| /* Section: not file related */ |
| int kvm_arch_hardware_enable(void) |
| { |
| /* every s390 is virtualization enabled ;-) */ |
| return 0; |
| } |
| |
| int kvm_arch_check_processor_compat(void *opaque) |
| { |
| return 0; |
| } |
| |
| /* forward declarations */ |
| static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
| unsigned long end); |
| static int sca_switch_to_extended(struct kvm *kvm); |
| |
| static void kvm_clock_sync_scb(struct kvm_s390_sie_block *scb, u64 delta) |
| { |
| u8 delta_idx = 0; |
| |
| /* |
| * The TOD jumps by delta, we have to compensate this by adding |
| * -delta to the epoch. |
| */ |
| delta = -delta; |
| |
| /* sign-extension - we're adding to signed values below */ |
| if ((s64)delta < 0) |
| delta_idx = -1; |
| |
| scb->epoch += delta; |
| if (scb->ecd & ECD_MEF) { |
| scb->epdx += delta_idx; |
| if (scb->epoch < delta) |
| scb->epdx += 1; |
| } |
| } |
| |
| /* |
| * This callback is executed during stop_machine(). All CPUs are therefore |
| * temporarily stopped. In order not to change guest behavior, we have to |
| * disable preemption whenever we touch the epoch of kvm and the VCPUs, |
| * so a CPU won't be stopped while calculating with the epoch. |
| */ |
| static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, |
| void *v) |
| { |
| struct kvm *kvm; |
| struct kvm_vcpu *vcpu; |
| int i; |
| unsigned long long *delta = v; |
| |
| list_for_each_entry(kvm, &vm_list, vm_list) { |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| kvm_clock_sync_scb(vcpu->arch.sie_block, *delta); |
| if (i == 0) { |
| kvm->arch.epoch = vcpu->arch.sie_block->epoch; |
| kvm->arch.epdx = vcpu->arch.sie_block->epdx; |
| } |
| if (vcpu->arch.cputm_enabled) |
| vcpu->arch.cputm_start += *delta; |
| if (vcpu->arch.vsie_block) |
| kvm_clock_sync_scb(vcpu->arch.vsie_block, |
| *delta); |
| } |
| } |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block kvm_clock_notifier = { |
| .notifier_call = kvm_clock_sync, |
| }; |
| |
| int kvm_arch_hardware_setup(void *opaque) |
| { |
| gmap_notifier.notifier_call = kvm_gmap_notifier; |
| gmap_register_pte_notifier(&gmap_notifier); |
| vsie_gmap_notifier.notifier_call = kvm_s390_vsie_gmap_notifier; |
| gmap_register_pte_notifier(&vsie_gmap_notifier); |
| atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
| &kvm_clock_notifier); |
| return 0; |
| } |
| |
| void kvm_arch_hardware_unsetup(void) |
| { |
| gmap_unregister_pte_notifier(&gmap_notifier); |
| gmap_unregister_pte_notifier(&vsie_gmap_notifier); |
| atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
| &kvm_clock_notifier); |
| } |
| |
| static void allow_cpu_feat(unsigned long nr) |
| { |
| set_bit_inv(nr, kvm_s390_available_cpu_feat); |
| } |
| |
| static inline int plo_test_bit(unsigned char nr) |
| { |
| register unsigned long r0 asm("0") = (unsigned long) nr | 0x100; |
| int cc; |
| |
| asm volatile( |
| /* Parameter registers are ignored for "test bit" */ |
| " plo 0,0,0,0(0)\n" |
| " ipm %0\n" |
| " srl %0,28\n" |
| : "=d" (cc) |
| : "d" (r0) |
| : "cc"); |
| return cc == 0; |
| } |
| |
| static __always_inline void __insn32_query(unsigned int opcode, u8 *query) |
| { |
| register unsigned long r0 asm("0") = 0; /* query function */ |
| register unsigned long r1 asm("1") = (unsigned long) query; |
| |
| asm volatile( |
| /* Parameter regs are ignored */ |
| " .insn rrf,%[opc] << 16,2,4,6,0\n" |
| : |
| : "d" (r0), "a" (r1), [opc] "i" (opcode) |
| : "cc", "memory"); |
| } |
| |
| #define INSN_SORTL 0xb938 |
| #define INSN_DFLTCC 0xb939 |
| |
| static void kvm_s390_cpu_feat_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < 256; ++i) { |
| if (plo_test_bit(i)) |
| kvm_s390_available_subfunc.plo[i >> 3] |= 0x80 >> (i & 7); |
| } |
| |
| if (test_facility(28)) /* TOD-clock steering */ |
| ptff(kvm_s390_available_subfunc.ptff, |
| sizeof(kvm_s390_available_subfunc.ptff), |
| PTFF_QAF); |
| |
| if (test_facility(17)) { /* MSA */ |
| __cpacf_query(CPACF_KMAC, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmac); |
| __cpacf_query(CPACF_KMC, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmc); |
| __cpacf_query(CPACF_KM, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.km); |
| __cpacf_query(CPACF_KIMD, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kimd); |
| __cpacf_query(CPACF_KLMD, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.klmd); |
| } |
| if (test_facility(76)) /* MSA3 */ |
| __cpacf_query(CPACF_PCKMO, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.pckmo); |
| if (test_facility(77)) { /* MSA4 */ |
| __cpacf_query(CPACF_KMCTR, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmctr); |
| __cpacf_query(CPACF_KMF, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmf); |
| __cpacf_query(CPACF_KMO, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kmo); |
| __cpacf_query(CPACF_PCC, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.pcc); |
| } |
| if (test_facility(57)) /* MSA5 */ |
| __cpacf_query(CPACF_PRNO, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.ppno); |
| |
| if (test_facility(146)) /* MSA8 */ |
| __cpacf_query(CPACF_KMA, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kma); |
| |
| if (test_facility(155)) /* MSA9 */ |
| __cpacf_query(CPACF_KDSA, (cpacf_mask_t *) |
| kvm_s390_available_subfunc.kdsa); |
| |
| if (test_facility(150)) /* SORTL */ |
| __insn32_query(INSN_SORTL, kvm_s390_available_subfunc.sortl); |
| |
| if (test_facility(151)) /* DFLTCC */ |
| __insn32_query(INSN_DFLTCC, kvm_s390_available_subfunc.dfltcc); |
| |
| if (MACHINE_HAS_ESOP) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP); |
| /* |
| * We need SIE support, ESOP (PROT_READ protection for gmap_shadow), |
| * 64bit SCAO (SCA passthrough) and IDTE (for gmap_shadow unshadowing). |
| */ |
| if (!sclp.has_sief2 || !MACHINE_HAS_ESOP || !sclp.has_64bscao || |
| !test_facility(3) || !nested) |
| return; |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); |
| if (sclp.has_64bscao) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); |
| if (sclp.has_siif) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF); |
| if (sclp.has_gpere) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GPERE); |
| if (sclp.has_gsls) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS); |
| if (sclp.has_ib) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB); |
| if (sclp.has_cei) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI); |
| if (sclp.has_ibs) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS); |
| if (sclp.has_kss) |
| allow_cpu_feat(KVM_S390_VM_CPU_FEAT_KSS); |
| /* |
| * KVM_S390_VM_CPU_FEAT_SKEY: Wrong shadow of PTE.I bits will make |
| * all skey handling functions read/set the skey from the PGSTE |
| * instead of the real storage key. |
| * |
| * KVM_S390_VM_CPU_FEAT_CMMA: Wrong shadow of PTE.I bits will make |
| * pages being detected as preserved although they are resident. |
| * |
| * KVM_S390_VM_CPU_FEAT_PFMFI: Wrong shadow of PTE.I bits will |
| * have the same effect as for KVM_S390_VM_CPU_FEAT_SKEY. |
| * |
| * For KVM_S390_VM_CPU_FEAT_SKEY, KVM_S390_VM_CPU_FEAT_CMMA and |
| * KVM_S390_VM_CPU_FEAT_PFMFI, all PTE.I and PGSTE bits have to be |
| * correctly shadowed. We can do that for the PGSTE but not for PTE.I. |
| * |
| * KVM_S390_VM_CPU_FEAT_SIGPIF: Wrong SCB addresses in the SCA. We |
| * cannot easily shadow the SCA because of the ipte lock. |
| */ |
| } |
| |
| int kvm_arch_init(void *opaque) |
| { |
| int rc = -ENOMEM; |
| |
| kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
| if (!kvm_s390_dbf) |
| return -ENOMEM; |
| |
| kvm_s390_dbf_uv = debug_register("kvm-uv", 32, 1, 7 * sizeof(long)); |
| if (!kvm_s390_dbf_uv) |
| goto out; |
| |
| if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view) || |
| debug_register_view(kvm_s390_dbf_uv, &debug_sprintf_view)) |
| goto out; |
| |
| kvm_s390_cpu_feat_init(); |
| |
| /* Register floating interrupt controller interface. */ |
| rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); |
| if (rc) { |
| pr_err("A FLIC registration call failed with rc=%d\n", rc); |
| goto out; |
| } |
| |
| rc = kvm_s390_gib_init(GAL_ISC); |
| if (rc) |
| goto out; |
| |
| return 0; |
| |
| out: |
| kvm_arch_exit(); |
| return rc; |
| } |
| |
| void kvm_arch_exit(void) |
| { |
| kvm_s390_gib_destroy(); |
| debug_unregister(kvm_s390_dbf); |
| debug_unregister(kvm_s390_dbf_uv); |
| } |
| |
| /* Section: device related */ |
| long kvm_arch_dev_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| if (ioctl == KVM_S390_ENABLE_SIE) |
| return s390_enable_sie(); |
| return -EINVAL; |
| } |
| |
| int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
| { |
| int r; |
| |
| switch (ext) { |
| case KVM_CAP_S390_PSW: |
| case KVM_CAP_S390_GMAP: |
| case KVM_CAP_SYNC_MMU: |
| #ifdef CONFIG_KVM_S390_UCONTROL |
| case KVM_CAP_S390_UCONTROL: |
| #endif |
| case KVM_CAP_ASYNC_PF: |
| case KVM_CAP_SYNC_REGS: |
| case KVM_CAP_ONE_REG: |
| case KVM_CAP_ENABLE_CAP: |
| case KVM_CAP_S390_CSS_SUPPORT: |
| case KVM_CAP_IOEVENTFD: |
| case KVM_CAP_DEVICE_CTRL: |
| case KVM_CAP_S390_IRQCHIP: |
| case KVM_CAP_VM_ATTRIBUTES: |
| case KVM_CAP_MP_STATE: |
| case KVM_CAP_IMMEDIATE_EXIT: |
| case KVM_CAP_S390_INJECT_IRQ: |
| case KVM_CAP_S390_USER_SIGP: |
| case KVM_CAP_S390_USER_STSI: |
| case KVM_CAP_S390_SKEYS: |
| case KVM_CAP_S390_IRQ_STATE: |
| case KVM_CAP_S390_USER_INSTR0: |
| case KVM_CAP_S390_CMMA_MIGRATION: |
| case KVM_CAP_S390_AIS: |
| case KVM_CAP_S390_AIS_MIGRATION: |
| case KVM_CAP_S390_VCPU_RESETS: |
| case KVM_CAP_SET_GUEST_DEBUG: |
| r = 1; |
| break; |
| case KVM_CAP_S390_HPAGE_1M: |
| r = 0; |
| if (hpage && !kvm_is_ucontrol(kvm)) |
| r = 1; |
| break; |
| case KVM_CAP_S390_MEM_OP: |
| r = MEM_OP_MAX_SIZE; |
| break; |
| case KVM_CAP_NR_VCPUS: |
| case KVM_CAP_MAX_VCPUS: |
| case KVM_CAP_MAX_VCPU_ID: |
| r = KVM_S390_BSCA_CPU_SLOTS; |
| if (!kvm_s390_use_sca_entries()) |
| r = KVM_MAX_VCPUS; |
| else if (sclp.has_esca && sclp.has_64bscao) |
| r = KVM_S390_ESCA_CPU_SLOTS; |
| break; |
| case KVM_CAP_S390_COW: |
| r = MACHINE_HAS_ESOP; |
| break; |
| case KVM_CAP_S390_VECTOR_REGISTERS: |
| r = MACHINE_HAS_VX; |
| break; |
| case KVM_CAP_S390_RI: |
| r = test_facility(64); |
| break; |
| case KVM_CAP_S390_GS: |
| r = test_facility(133); |
| break; |
| case KVM_CAP_S390_BPB: |
| r = test_facility(82); |
| break; |
| case KVM_CAP_S390_PROTECTED: |
| r = is_prot_virt_host(); |
| break; |
| default: |
| r = 0; |
| } |
| return r; |
| } |
| |
| void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) |
| { |
| int i; |
| gfn_t cur_gfn, last_gfn; |
| unsigned long gaddr, vmaddr; |
| struct gmap *gmap = kvm->arch.gmap; |
| DECLARE_BITMAP(bitmap, _PAGE_ENTRIES); |
| |
| /* Loop over all guest segments */ |
| cur_gfn = memslot->base_gfn; |
| last_gfn = memslot->base_gfn + memslot->npages; |
| for (; cur_gfn <= last_gfn; cur_gfn += _PAGE_ENTRIES) { |
| gaddr = gfn_to_gpa(cur_gfn); |
| vmaddr = gfn_to_hva_memslot(memslot, cur_gfn); |
| if (kvm_is_error_hva(vmaddr)) |
| continue; |
| |
| bitmap_zero(bitmap, _PAGE_ENTRIES); |
| gmap_sync_dirty_log_pmd(gmap, bitmap, gaddr, vmaddr); |
| for (i = 0; i < _PAGE_ENTRIES; i++) { |
| if (test_bit(i, bitmap)) |
| mark_page_dirty(kvm, cur_gfn + i); |
| } |
| |
| if (fatal_signal_pending(current)) |
| return; |
| cond_resched(); |
| } |
| } |
| |
| /* Section: vm related */ |
| static void sca_del_vcpu(struct kvm_vcpu *vcpu); |
| |
| /* |
| * Get (and clear) the dirty memory log for a memory slot. |
| */ |
| int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
| struct kvm_dirty_log *log) |
| { |
| int r; |
| unsigned long n; |
| struct kvm_memory_slot *memslot; |
| int is_dirty; |
| |
| if (kvm_is_ucontrol(kvm)) |
| return -EINVAL; |
| |
| mutex_lock(&kvm->slots_lock); |
| |
| r = -EINVAL; |
| if (log->slot >= KVM_USER_MEM_SLOTS) |
| goto out; |
| |
| r = kvm_get_dirty_log(kvm, log, &is_dirty, &memslot); |
| if (r) |
| goto out; |
| |
| /* Clear the dirty log */ |
| if (is_dirty) { |
| n = kvm_dirty_bitmap_bytes(memslot); |
| memset(memslot->dirty_bitmap, 0, n); |
| } |
| r = 0; |
| out: |
| mutex_unlock(&kvm->slots_lock); |
| return r; |
| } |
| |
| static void icpt_operexc_on_all_vcpus(struct kvm *kvm) |
| { |
| unsigned int i; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| kvm_s390_sync_request(KVM_REQ_ICPT_OPEREXC, vcpu); |
| } |
| } |
| |
| int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
| { |
| int r; |
| |
| if (cap->flags) |
| return -EINVAL; |
| |
| switch (cap->cap) { |
| case KVM_CAP_S390_IRQCHIP: |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
| kvm->arch.use_irqchip = 1; |
| r = 0; |
| break; |
| case KVM_CAP_S390_USER_SIGP: |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
| kvm->arch.user_sigp = 1; |
| r = 0; |
| break; |
| case KVM_CAP_S390_VECTOR_REGISTERS: |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| r = -EBUSY; |
| } else if (MACHINE_HAS_VX) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 129); |
| set_kvm_facility(kvm->arch.model.fac_list, 129); |
| if (test_facility(134)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 134); |
| set_kvm_facility(kvm->arch.model.fac_list, 134); |
| } |
| if (test_facility(135)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 135); |
| set_kvm_facility(kvm->arch.model.fac_list, 135); |
| } |
| if (test_facility(148)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 148); |
| set_kvm_facility(kvm->arch.model.fac_list, 148); |
| } |
| if (test_facility(152)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 152); |
| set_kvm_facility(kvm->arch.model.fac_list, 152); |
| } |
| r = 0; |
| } else |
| r = -EINVAL; |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
| r ? "(not available)" : "(success)"); |
| break; |
| case KVM_CAP_S390_RI: |
| r = -EINVAL; |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| r = -EBUSY; |
| } else if (test_facility(64)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 64); |
| set_kvm_facility(kvm->arch.model.fac_list, 64); |
| r = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s", |
| r ? "(not available)" : "(success)"); |
| break; |
| case KVM_CAP_S390_AIS: |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| r = -EBUSY; |
| } else { |
| set_kvm_facility(kvm->arch.model.fac_mask, 72); |
| set_kvm_facility(kvm->arch.model.fac_list, 72); |
| r = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: AIS %s", |
| r ? "(not available)" : "(success)"); |
| break; |
| case KVM_CAP_S390_GS: |
| r = -EINVAL; |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| r = -EBUSY; |
| } else if (test_facility(133)) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 133); |
| set_kvm_facility(kvm->arch.model.fac_list, 133); |
| r = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s", |
| r ? "(not available)" : "(success)"); |
| break; |
| case KVM_CAP_S390_HPAGE_1M: |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) |
| r = -EBUSY; |
| else if (!hpage || kvm->arch.use_cmma || kvm_is_ucontrol(kvm)) |
| r = -EINVAL; |
| else { |
| r = 0; |
| mmap_write_lock(kvm->mm); |
| kvm->mm->context.allow_gmap_hpage_1m = 1; |
| mmap_write_unlock(kvm->mm); |
| /* |
| * We might have to create fake 4k page |
| * tables. To avoid that the hardware works on |
| * stale PGSTEs, we emulate these instructions. |
| */ |
| kvm->arch.use_skf = 0; |
| kvm->arch.use_pfmfi = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "ENABLE: CAP_S390_HPAGE %s", |
| r ? "(not available)" : "(success)"); |
| break; |
| case KVM_CAP_S390_USER_STSI: |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
| kvm->arch.user_stsi = 1; |
| r = 0; |
| break; |
| case KVM_CAP_S390_USER_INSTR0: |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_INSTR0"); |
| kvm->arch.user_instr0 = 1; |
| icpt_operexc_on_all_vcpus(kvm); |
| r = 0; |
| break; |
| default: |
| r = -EINVAL; |
| break; |
| } |
| return r; |
| } |
| |
| static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_MEM_LIMIT_SIZE: |
| ret = 0; |
| VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
| kvm->arch.mem_limit); |
| if (put_user(kvm->arch.mem_limit, (u64 __user *)attr->addr)) |
| ret = -EFAULT; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| unsigned int idx; |
| switch (attr->attr) { |
| case KVM_S390_VM_MEM_ENABLE_CMMA: |
| ret = -ENXIO; |
| if (!sclp.has_cmma) |
| break; |
| |
| VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) |
| ret = -EBUSY; |
| else if (kvm->mm->context.allow_gmap_hpage_1m) |
| ret = -EINVAL; |
| else { |
| kvm->arch.use_cmma = 1; |
| /* Not compatible with cmma. */ |
| kvm->arch.use_pfmfi = 0; |
| ret = 0; |
| } |
| mutex_unlock(&kvm->lock); |
| break; |
| case KVM_S390_VM_MEM_CLR_CMMA: |
| ret = -ENXIO; |
| if (!sclp.has_cmma) |
| break; |
| ret = -EINVAL; |
| if (!kvm->arch.use_cmma) |
| break; |
| |
| VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
| mutex_lock(&kvm->lock); |
| idx = srcu_read_lock(&kvm->srcu); |
| s390_reset_cmma(kvm->arch.gmap->mm); |
| srcu_read_unlock(&kvm->srcu, idx); |
| mutex_unlock(&kvm->lock); |
| ret = 0; |
| break; |
| case KVM_S390_VM_MEM_LIMIT_SIZE: { |
| unsigned long new_limit; |
| |
| if (kvm_is_ucontrol(kvm)) |
| return -EINVAL; |
| |
| if (get_user(new_limit, (u64 __user *)attr->addr)) |
| return -EFAULT; |
| |
| if (kvm->arch.mem_limit != KVM_S390_NO_MEM_LIMIT && |
| new_limit > kvm->arch.mem_limit) |
| return -E2BIG; |
| |
| if (!new_limit) |
| return -EINVAL; |
| |
| /* gmap_create takes last usable address */ |
| if (new_limit != KVM_S390_NO_MEM_LIMIT) |
| new_limit -= 1; |
| |
| ret = -EBUSY; |
| mutex_lock(&kvm->lock); |
| if (!kvm->created_vcpus) { |
| /* gmap_create will round the limit up */ |
| struct gmap *new = gmap_create(current->mm, new_limit); |
| |
| if (!new) { |
| ret = -ENOMEM; |
| } else { |
| gmap_remove(kvm->arch.gmap); |
| new->private = kvm; |
| kvm->arch.gmap = new; |
| ret = 0; |
| } |
| } |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "SET: max guest address: %lu", new_limit); |
| VM_EVENT(kvm, 3, "New guest asce: 0x%pK", |
| (void *) kvm->arch.gmap->asce); |
| break; |
| } |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| return ret; |
| } |
| |
| static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
| |
| void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm) |
| { |
| struct kvm_vcpu *vcpu; |
| int i; |
| |
| kvm_s390_vcpu_block_all(kvm); |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| kvm_s390_vcpu_crypto_setup(vcpu); |
| /* recreate the shadow crycb by leaving the VSIE handler */ |
| kvm_s390_sync_request(KVM_REQ_VSIE_RESTART, vcpu); |
| } |
| |
| kvm_s390_vcpu_unblock_all(kvm); |
| } |
| |
| static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| mutex_lock(&kvm->lock); |
| switch (attr->attr) { |
| case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| get_random_bytes( |
| kvm->arch.crypto.crycb->aes_wrapping_key_mask, |
| sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); |
| kvm->arch.crypto.aes_kw = 1; |
| VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| get_random_bytes( |
| kvm->arch.crypto.crycb->dea_wrapping_key_mask, |
| sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); |
| kvm->arch.crypto.dea_kw = 1; |
| VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| kvm->arch.crypto.aes_kw = 0; |
| memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, |
| sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); |
| VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: |
| if (!test_kvm_facility(kvm, 76)) { |
| mutex_unlock(&kvm->lock); |
| return -EINVAL; |
| } |
| kvm->arch.crypto.dea_kw = 0; |
| memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, |
| sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); |
| VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
| break; |
| case KVM_S390_VM_CRYPTO_ENABLE_APIE: |
| if (!ap_instructions_available()) { |
| mutex_unlock(&kvm->lock); |
| return -EOPNOTSUPP; |
| } |
| kvm->arch.crypto.apie = 1; |
| break; |
| case KVM_S390_VM_CRYPTO_DISABLE_APIE: |
| if (!ap_instructions_available()) { |
| mutex_unlock(&kvm->lock); |
| return -EOPNOTSUPP; |
| } |
| kvm->arch.crypto.apie = 0; |
| break; |
| default: |
| mutex_unlock(&kvm->lock); |
| return -ENXIO; |
| } |
| |
| kvm_s390_vcpu_crypto_reset_all(kvm); |
| mutex_unlock(&kvm->lock); |
| return 0; |
| } |
| |
| static void kvm_s390_sync_request_broadcast(struct kvm *kvm, int req) |
| { |
| int cx; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(cx, vcpu, kvm) |
| kvm_s390_sync_request(req, vcpu); |
| } |
| |
| /* |
| * Must be called with kvm->srcu held to avoid races on memslots, and with |
| * kvm->slots_lock to avoid races with ourselves and kvm_s390_vm_stop_migration. |
| */ |
| static int kvm_s390_vm_start_migration(struct kvm *kvm) |
| { |
| struct kvm_memory_slot *ms; |
| struct kvm_memslots *slots; |
| unsigned long ram_pages = 0; |
| int slotnr; |
| |
| /* migration mode already enabled */ |
| if (kvm->arch.migration_mode) |
| return 0; |
| slots = kvm_memslots(kvm); |
| if (!slots || !slots->used_slots) |
| return -EINVAL; |
| |
| if (!kvm->arch.use_cmma) { |
| kvm->arch.migration_mode = 1; |
| return 0; |
| } |
| /* mark all the pages in active slots as dirty */ |
| for (slotnr = 0; slotnr < slots->used_slots; slotnr++) { |
| ms = slots->memslots + slotnr; |
| if (!ms->dirty_bitmap) |
| return -EINVAL; |
| /* |
| * The second half of the bitmap is only used on x86, |
| * and would be wasted otherwise, so we put it to good |
| * use here to keep track of the state of the storage |
| * attributes. |
| */ |
| memset(kvm_second_dirty_bitmap(ms), 0xff, kvm_dirty_bitmap_bytes(ms)); |
| ram_pages += ms->npages; |
| } |
| atomic64_set(&kvm->arch.cmma_dirty_pages, ram_pages); |
| kvm->arch.migration_mode = 1; |
| kvm_s390_sync_request_broadcast(kvm, KVM_REQ_START_MIGRATION); |
| return 0; |
| } |
| |
| /* |
| * Must be called with kvm->slots_lock to avoid races with ourselves and |
| * kvm_s390_vm_start_migration. |
| */ |
| static int kvm_s390_vm_stop_migration(struct kvm *kvm) |
| { |
| /* migration mode already disabled */ |
| if (!kvm->arch.migration_mode) |
| return 0; |
| kvm->arch.migration_mode = 0; |
| if (kvm->arch.use_cmma) |
| kvm_s390_sync_request_broadcast(kvm, KVM_REQ_STOP_MIGRATION); |
| return 0; |
| } |
| |
| static int kvm_s390_vm_set_migration(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| int res = -ENXIO; |
| |
| mutex_lock(&kvm->slots_lock); |
| switch (attr->attr) { |
| case KVM_S390_VM_MIGRATION_START: |
| res = kvm_s390_vm_start_migration(kvm); |
| break; |
| case KVM_S390_VM_MIGRATION_STOP: |
| res = kvm_s390_vm_stop_migration(kvm); |
| break; |
| default: |
| break; |
| } |
| mutex_unlock(&kvm->slots_lock); |
| |
| return res; |
| } |
| |
| static int kvm_s390_vm_get_migration(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| u64 mig = kvm->arch.migration_mode; |
| |
| if (attr->attr != KVM_S390_VM_MIGRATION_STATUS) |
| return -ENXIO; |
| |
| if (copy_to_user((void __user *)attr->addr, &mig, sizeof(mig))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int kvm_s390_set_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_tod_clock gtod; |
| |
| if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) |
| return -EFAULT; |
| |
| if (!test_kvm_facility(kvm, 139) && gtod.epoch_idx) |
| return -EINVAL; |
| kvm_s390_set_tod_clock(kvm, >od); |
| |
| VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x, TOD base: 0x%llx", |
| gtod.epoch_idx, gtod.tod); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| u8 gtod_high; |
| |
| if (copy_from_user(>od_high, (void __user *)attr->addr, |
| sizeof(gtod_high))) |
| return -EFAULT; |
| |
| if (gtod_high != 0) |
| return -EINVAL; |
| VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_tod_clock gtod = { 0 }; |
| |
| if (copy_from_user(>od.tod, (void __user *)attr->addr, |
| sizeof(gtod.tod))) |
| return -EFAULT; |
| |
| kvm_s390_set_tod_clock(kvm, >od); |
| VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod.tod); |
| return 0; |
| } |
| |
| static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| if (attr->flags) |
| return -EINVAL; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_TOD_EXT: |
| ret = kvm_s390_set_tod_ext(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_HIGH: |
| ret = kvm_s390_set_tod_high(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_LOW: |
| ret = kvm_s390_set_tod_low(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| return ret; |
| } |
| |
| static void kvm_s390_get_tod_clock(struct kvm *kvm, |
| struct kvm_s390_vm_tod_clock *gtod) |
| { |
| struct kvm_s390_tod_clock_ext htod; |
| |
| preempt_disable(); |
| |
| get_tod_clock_ext((char *)&htod); |
| |
| gtod->tod = htod.tod + kvm->arch.epoch; |
| gtod->epoch_idx = 0; |
| if (test_kvm_facility(kvm, 139)) { |
| gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx; |
| if (gtod->tod < htod.tod) |
| gtod->epoch_idx += 1; |
| } |
| |
| preempt_enable(); |
| } |
| |
| static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_tod_clock gtod; |
| |
| memset(>od, 0, sizeof(gtod)); |
| kvm_s390_get_tod_clock(kvm, >od); |
| if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
| return -EFAULT; |
| |
| VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x, TOD base: 0x%llx", |
| gtod.epoch_idx, gtod.tod); |
| return 0; |
| } |
| |
| static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| u8 gtod_high = 0; |
| |
| if (copy_to_user((void __user *)attr->addr, >od_high, |
| sizeof(gtod_high))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| u64 gtod; |
| |
| gtod = kvm_s390_get_tod_clock_fast(kvm); |
| if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| if (attr->flags) |
| return -EINVAL; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_TOD_EXT: |
| ret = kvm_s390_get_tod_ext(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_HIGH: |
| ret = kvm_s390_get_tod_high(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD_LOW: |
| ret = kvm_s390_get_tod_low(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_processor *proc; |
| u16 lowest_ibc, unblocked_ibc; |
| int ret = 0; |
| |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| ret = -EBUSY; |
| goto out; |
| } |
| proc = kzalloc(sizeof(*proc), GFP_KERNEL); |
| if (!proc) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| if (!copy_from_user(proc, (void __user *)attr->addr, |
| sizeof(*proc))) { |
| kvm->arch.model.cpuid = proc->cpuid; |
| lowest_ibc = sclp.ibc >> 16 & 0xfff; |
| unblocked_ibc = sclp.ibc & 0xfff; |
| if (lowest_ibc && proc->ibc) { |
| if (proc->ibc > unblocked_ibc) |
| kvm->arch.model.ibc = unblocked_ibc; |
| else if (proc->ibc < lowest_ibc) |
| kvm->arch.model.ibc = lowest_ibc; |
| else |
| kvm->arch.model.ibc = proc->ibc; |
| } |
| memcpy(kvm->arch.model.fac_list, proc->fac_list, |
| S390_ARCH_FAC_LIST_SIZE_BYTE); |
| VM_EVENT(kvm, 3, "SET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
| kvm->arch.model.ibc, |
| kvm->arch.model.cpuid); |
| VM_EVENT(kvm, 3, "SET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", |
| kvm->arch.model.fac_list[0], |
| kvm->arch.model.fac_list[1], |
| kvm->arch.model.fac_list[2]); |
| } else |
| ret = -EFAULT; |
| kfree(proc); |
| out: |
| mutex_unlock(&kvm->lock); |
| return ret; |
| } |
| |
| static int kvm_s390_set_processor_feat(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_feat data; |
| |
| if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data))) |
| return -EFAULT; |
| if (!bitmap_subset((unsigned long *) data.feat, |
| kvm_s390_available_cpu_feat, |
| KVM_S390_VM_CPU_FEAT_NR_BITS)) |
| return -EINVAL; |
| |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| mutex_unlock(&kvm->lock); |
| return -EBUSY; |
| } |
| bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat, |
| KVM_S390_VM_CPU_FEAT_NR_BITS); |
| mutex_unlock(&kvm->lock); |
| VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx", |
| data.feat[0], |
| data.feat[1], |
| data.feat[2]); |
| return 0; |
| } |
| |
| static int kvm_s390_set_processor_subfunc(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| mutex_lock(&kvm->lock); |
| if (kvm->created_vcpus) { |
| mutex_unlock(&kvm->lock); |
| return -EBUSY; |
| } |
| |
| if (copy_from_user(&kvm->arch.model.subfuncs, (void __user *)attr->addr, |
| sizeof(struct kvm_s390_vm_cpu_subfunc))) { |
| mutex_unlock(&kvm->lock); |
| return -EFAULT; |
| } |
| mutex_unlock(&kvm->lock); |
| |
| VM_EVENT(kvm, 3, "SET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]); |
| VM_EVENT(kvm, 3, "SET: guest PTFF subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KMAC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KMC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KM subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.km)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KIMD subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KLMD subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]); |
| VM_EVENT(kvm, 3, "SET: guest PCKMO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KMCTR subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KMF subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KMO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]); |
| VM_EVENT(kvm, 3, "SET: guest PCC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]); |
| VM_EVENT(kvm, 3, "SET: guest PPNO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KMA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]); |
| VM_EVENT(kvm, 3, "SET: guest KDSA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]); |
| VM_EVENT(kvm, 3, "SET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]); |
| VM_EVENT(kvm, 3, "SET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret = -ENXIO; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_CPU_PROCESSOR: |
| ret = kvm_s390_set_processor(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
| ret = kvm_s390_set_processor_feat(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
| ret = kvm_s390_set_processor_subfunc(kvm, attr); |
| break; |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_processor *proc; |
| int ret = 0; |
| |
| proc = kzalloc(sizeof(*proc), GFP_KERNEL); |
| if (!proc) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| proc->cpuid = kvm->arch.model.cpuid; |
| proc->ibc = kvm->arch.model.ibc; |
| memcpy(&proc->fac_list, kvm->arch.model.fac_list, |
| S390_ARCH_FAC_LIST_SIZE_BYTE); |
| VM_EVENT(kvm, 3, "GET: guest ibc: 0x%4.4x, guest cpuid: 0x%16.16llx", |
| kvm->arch.model.ibc, |
| kvm->arch.model.cpuid); |
| VM_EVENT(kvm, 3, "GET: guest faclist: 0x%16.16llx.%16.16llx.%16.16llx", |
| kvm->arch.model.fac_list[0], |
| kvm->arch.model.fac_list[1], |
| kvm->arch.model.fac_list[2]); |
| if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
| ret = -EFAULT; |
| kfree(proc); |
| out: |
| return ret; |
| } |
| |
| static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_machine *mach; |
| int ret = 0; |
| |
| mach = kzalloc(sizeof(*mach), GFP_KERNEL); |
| if (!mach) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| get_cpu_id((struct cpuid *) &mach->cpuid); |
| mach->ibc = sclp.ibc; |
| memcpy(&mach->fac_mask, kvm->arch.model.fac_mask, |
| S390_ARCH_FAC_LIST_SIZE_BYTE); |
| memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
| sizeof(S390_lowcore.stfle_fac_list)); |
| VM_EVENT(kvm, 3, "GET: host ibc: 0x%4.4x, host cpuid: 0x%16.16llx", |
| kvm->arch.model.ibc, |
| kvm->arch.model.cpuid); |
| VM_EVENT(kvm, 3, "GET: host facmask: 0x%16.16llx.%16.16llx.%16.16llx", |
| mach->fac_mask[0], |
| mach->fac_mask[1], |
| mach->fac_mask[2]); |
| VM_EVENT(kvm, 3, "GET: host faclist: 0x%16.16llx.%16.16llx.%16.16llx", |
| mach->fac_list[0], |
| mach->fac_list[1], |
| mach->fac_list[2]); |
| if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
| ret = -EFAULT; |
| kfree(mach); |
| out: |
| return ret; |
| } |
| |
| static int kvm_s390_get_processor_feat(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_feat data; |
| |
| bitmap_copy((unsigned long *) data.feat, kvm->arch.cpu_feat, |
| KVM_S390_VM_CPU_FEAT_NR_BITS); |
| if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx", |
| data.feat[0], |
| data.feat[1], |
| data.feat[2]); |
| return 0; |
| } |
| |
| static int kvm_s390_get_machine_feat(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| struct kvm_s390_vm_cpu_feat data; |
| |
| bitmap_copy((unsigned long *) data.feat, |
| kvm_s390_available_cpu_feat, |
| KVM_S390_VM_CPU_FEAT_NR_BITS); |
| if (copy_to_user((void __user *)attr->addr, &data, sizeof(data))) |
| return -EFAULT; |
| VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx", |
| data.feat[0], |
| data.feat[1], |
| data.feat[2]); |
| return 0; |
| } |
| |
| static int kvm_s390_get_processor_subfunc(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| if (copy_to_user((void __user *)attr->addr, &kvm->arch.model.subfuncs, |
| sizeof(struct kvm_s390_vm_cpu_subfunc))) |
| return -EFAULT; |
| |
| VM_EVENT(kvm, 3, "GET: guest PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.plo)[3]); |
| VM_EVENT(kvm, 3, "GET: guest PTFF subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.ptff)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KMAC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmac)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KMC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmc)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KM subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.km)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.km)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KIMD subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kimd)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KLMD subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.klmd)[1]); |
| VM_EVENT(kvm, 3, "GET: guest PCKMO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.pckmo)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KMCTR subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmctr)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KMF subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmf)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KMO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kmo)[1]); |
| VM_EVENT(kvm, 3, "GET: guest PCC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.pcc)[1]); |
| VM_EVENT(kvm, 3, "GET: guest PPNO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.ppno)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KMA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kma)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kma)[1]); |
| VM_EVENT(kvm, 3, "GET: guest KDSA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.kdsa)[1]); |
| VM_EVENT(kvm, 3, "GET: guest SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.sortl)[3]); |
| VM_EVENT(kvm, 3, "GET: guest DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[0], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[1], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[2], |
| ((unsigned long *) &kvm->arch.model.subfuncs.dfltcc)[3]); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_machine_subfunc(struct kvm *kvm, |
| struct kvm_device_attr *attr) |
| { |
| if (copy_to_user((void __user *)attr->addr, &kvm_s390_available_subfunc, |
| sizeof(struct kvm_s390_vm_cpu_subfunc))) |
| return -EFAULT; |
| |
| VM_EVENT(kvm, 3, "GET: host PLO subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.plo)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.plo)[1], |
| ((unsigned long *) &kvm_s390_available_subfunc.plo)[2], |
| ((unsigned long *) &kvm_s390_available_subfunc.plo)[3]); |
| VM_EVENT(kvm, 3, "GET: host PTFF subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.ptff)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.ptff)[1]); |
| VM_EVENT(kvm, 3, "GET: host KMAC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kmac)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kmac)[1]); |
| VM_EVENT(kvm, 3, "GET: host KMC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kmc)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kmc)[1]); |
| VM_EVENT(kvm, 3, "GET: host KM subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.km)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.km)[1]); |
| VM_EVENT(kvm, 3, "GET: host KIMD subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kimd)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kimd)[1]); |
| VM_EVENT(kvm, 3, "GET: host KLMD subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.klmd)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.klmd)[1]); |
| VM_EVENT(kvm, 3, "GET: host PCKMO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.pckmo)[1]); |
| VM_EVENT(kvm, 3, "GET: host KMCTR subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kmctr)[1]); |
| VM_EVENT(kvm, 3, "GET: host KMF subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kmf)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kmf)[1]); |
| VM_EVENT(kvm, 3, "GET: host KMO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kmo)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kmo)[1]); |
| VM_EVENT(kvm, 3, "GET: host PCC subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.pcc)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.pcc)[1]); |
| VM_EVENT(kvm, 3, "GET: host PPNO subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.ppno)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.ppno)[1]); |
| VM_EVENT(kvm, 3, "GET: host KMA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kma)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kma)[1]); |
| VM_EVENT(kvm, 3, "GET: host KDSA subfunc 0x%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.kdsa)[1]); |
| VM_EVENT(kvm, 3, "GET: host SORTL subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[1], |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[2], |
| ((unsigned long *) &kvm_s390_available_subfunc.sortl)[3]); |
| VM_EVENT(kvm, 3, "GET: host DFLTCC subfunc 0x%16.16lx.%16.16lx.%16.16lx.%16.16lx", |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[0], |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[1], |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[2], |
| ((unsigned long *) &kvm_s390_available_subfunc.dfltcc)[3]); |
| |
| return 0; |
| } |
| |
| static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret = -ENXIO; |
| |
| switch (attr->attr) { |
| case KVM_S390_VM_CPU_PROCESSOR: |
| ret = kvm_s390_get_processor(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MACHINE: |
| ret = kvm_s390_get_machine(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
| ret = kvm_s390_get_processor_feat(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MACHINE_FEAT: |
| ret = kvm_s390_get_machine_feat(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
| ret = kvm_s390_get_processor_subfunc(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MACHINE_SUBFUNC: |
| ret = kvm_s390_get_machine_subfunc(kvm, attr); |
| break; |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_S390_VM_MEM_CTRL: |
| ret = kvm_s390_set_mem_control(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD: |
| ret = kvm_s390_set_tod(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MODEL: |
| ret = kvm_s390_set_cpu_model(kvm, attr); |
| break; |
| case KVM_S390_VM_CRYPTO: |
| ret = kvm_s390_vm_set_crypto(kvm, attr); |
| break; |
| case KVM_S390_VM_MIGRATION: |
| ret = kvm_s390_vm_set_migration(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_S390_VM_MEM_CTRL: |
| ret = kvm_s390_get_mem_control(kvm, attr); |
| break; |
| case KVM_S390_VM_TOD: |
| ret = kvm_s390_get_tod(kvm, attr); |
| break; |
| case KVM_S390_VM_CPU_MODEL: |
| ret = kvm_s390_get_cpu_model(kvm, attr); |
| break; |
| case KVM_S390_VM_MIGRATION: |
| ret = kvm_s390_vm_get_migration(kvm, attr); |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
| { |
| int ret; |
| |
| switch (attr->group) { |
| case KVM_S390_VM_MEM_CTRL: |
| switch (attr->attr) { |
| case KVM_S390_VM_MEM_ENABLE_CMMA: |
| case KVM_S390_VM_MEM_CLR_CMMA: |
| ret = sclp.has_cmma ? 0 : -ENXIO; |
| break; |
| case KVM_S390_VM_MEM_LIMIT_SIZE: |
| ret = 0; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_TOD: |
| switch (attr->attr) { |
| case KVM_S390_VM_TOD_LOW: |
| case KVM_S390_VM_TOD_HIGH: |
| ret = 0; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_CPU_MODEL: |
| switch (attr->attr) { |
| case KVM_S390_VM_CPU_PROCESSOR: |
| case KVM_S390_VM_CPU_MACHINE: |
| case KVM_S390_VM_CPU_PROCESSOR_FEAT: |
| case KVM_S390_VM_CPU_MACHINE_FEAT: |
| case KVM_S390_VM_CPU_MACHINE_SUBFUNC: |
| case KVM_S390_VM_CPU_PROCESSOR_SUBFUNC: |
| ret = 0; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_CRYPTO: |
| switch (attr->attr) { |
| case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: |
| case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: |
| case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: |
| case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: |
| ret = 0; |
| break; |
| case KVM_S390_VM_CRYPTO_ENABLE_APIE: |
| case KVM_S390_VM_CRYPTO_DISABLE_APIE: |
| ret = ap_instructions_available() ? 0 : -ENXIO; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| break; |
| case KVM_S390_VM_MIGRATION: |
| ret = 0; |
| break; |
| default: |
| ret = -ENXIO; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
| { |
| uint8_t *keys; |
| uint64_t hva; |
| int srcu_idx, i, r = 0; |
| |
| if (args->flags != 0) |
| return -EINVAL; |
| |
| /* Is this guest using storage keys? */ |
| if (!mm_uses_skeys(current->mm)) |
| return KVM_S390_GET_SKEYS_NONE; |
| |
| /* Enforce sane limit on memory allocation */ |
| if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) |
| return -EINVAL; |
| |
| keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL); |
| if (!keys) |
| return -ENOMEM; |
| |
| mmap_read_lock(current->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| for (i = 0; i < args->count; i++) { |
| hva = gfn_to_hva(kvm, args->start_gfn + i); |
| if (kvm_is_error_hva(hva)) { |
| r = -EFAULT; |
| break; |
| } |
| |
| r = get_guest_storage_key(current->mm, hva, &keys[i]); |
| if (r) |
| break; |
| } |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(current->mm); |
| |
| if (!r) { |
| r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, |
| sizeof(uint8_t) * args->count); |
| if (r) |
| r = -EFAULT; |
| } |
| |
| kvfree(keys); |
| return r; |
| } |
| |
| static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
| { |
| uint8_t *keys; |
| uint64_t hva; |
| int srcu_idx, i, r = 0; |
| bool unlocked; |
| |
| if (args->flags != 0) |
| return -EINVAL; |
| |
| /* Enforce sane limit on memory allocation */ |
| if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) |
| return -EINVAL; |
| |
| keys = kvmalloc_array(args->count, sizeof(uint8_t), GFP_KERNEL); |
| if (!keys) |
| return -ENOMEM; |
| |
| r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, |
| sizeof(uint8_t) * args->count); |
| if (r) { |
| r = -EFAULT; |
| goto out; |
| } |
| |
| /* Enable storage key handling for the guest */ |
| r = s390_enable_skey(); |
| if (r) |
| goto out; |
| |
| i = 0; |
| mmap_read_lock(current->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| while (i < args->count) { |
| unlocked = false; |
| hva = gfn_to_hva(kvm, args->start_gfn + i); |
| if (kvm_is_error_hva(hva)) { |
| r = -EFAULT; |
| break; |
| } |
| |
| /* Lowest order bit is reserved */ |
| if (keys[i] & 0x01) { |
| r = -EINVAL; |
| break; |
| } |
| |
| r = set_guest_storage_key(current->mm, hva, keys[i], 0); |
| if (r) { |
| r = fixup_user_fault(current, current->mm, hva, |
| FAULT_FLAG_WRITE, &unlocked); |
| if (r) |
| break; |
| } |
| if (!r) |
| i++; |
| } |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(current->mm); |
| out: |
| kvfree(keys); |
| return r; |
| } |
| |
| /* |
| * Base address and length must be sent at the start of each block, therefore |
| * it's cheaper to send some clean data, as long as it's less than the size of |
| * two longs. |
| */ |
| #define KVM_S390_MAX_BIT_DISTANCE (2 * sizeof(void *)) |
| /* for consistency */ |
| #define KVM_S390_CMMA_SIZE_MAX ((u32)KVM_S390_SKEYS_MAX) |
| |
| /* |
| * Similar to gfn_to_memslot, but returns the index of a memslot also when the |
| * address falls in a hole. In that case the index of one of the memslots |
| * bordering the hole is returned. |
| */ |
| static int gfn_to_memslot_approx(struct kvm_memslots *slots, gfn_t gfn) |
| { |
| int start = 0, end = slots->used_slots; |
| int slot = atomic_read(&slots->lru_slot); |
| struct kvm_memory_slot *memslots = slots->memslots; |
| |
| if (gfn >= memslots[slot].base_gfn && |
| gfn < memslots[slot].base_gfn + memslots[slot].npages) |
| return slot; |
| |
| while (start < end) { |
| slot = start + (end - start) / 2; |
| |
| if (gfn >= memslots[slot].base_gfn) |
| end = slot; |
| else |
| start = slot + 1; |
| } |
| |
| if (start >= slots->used_slots) |
| return slots->used_slots - 1; |
| |
| if (gfn >= memslots[start].base_gfn && |
| gfn < memslots[start].base_gfn + memslots[start].npages) { |
| atomic_set(&slots->lru_slot, start); |
| } |
| |
| return start; |
| } |
| |
| static int kvm_s390_peek_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args, |
| u8 *res, unsigned long bufsize) |
| { |
| unsigned long pgstev, hva, cur_gfn = args->start_gfn; |
| |
| args->count = 0; |
| while (args->count < bufsize) { |
| hva = gfn_to_hva(kvm, cur_gfn); |
| /* |
| * We return an error if the first value was invalid, but we |
| * return successfully if at least one value was copied. |
| */ |
| if (kvm_is_error_hva(hva)) |
| return args->count ? 0 : -EFAULT; |
| if (get_pgste(kvm->mm, hva, &pgstev) < 0) |
| pgstev = 0; |
| res[args->count++] = (pgstev >> 24) & 0x43; |
| cur_gfn++; |
| } |
| |
| return 0; |
| } |
| |
| static unsigned long kvm_s390_next_dirty_cmma(struct kvm_memslots *slots, |
| unsigned long cur_gfn) |
| { |
| int slotidx = gfn_to_memslot_approx(slots, cur_gfn); |
| struct kvm_memory_slot *ms = slots->memslots + slotidx; |
| unsigned long ofs = cur_gfn - ms->base_gfn; |
| |
| if (ms->base_gfn + ms->npages <= cur_gfn) { |
| slotidx--; |
| /* If we are above the highest slot, wrap around */ |
| if (slotidx < 0) |
| slotidx = slots->used_slots - 1; |
| |
| ms = slots->memslots + slotidx; |
| ofs = 0; |
| } |
| ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, ofs); |
| while ((slotidx > 0) && (ofs >= ms->npages)) { |
| slotidx--; |
| ms = slots->memslots + slotidx; |
| ofs = find_next_bit(kvm_second_dirty_bitmap(ms), ms->npages, 0); |
| } |
| return ms->base_gfn + ofs; |
| } |
| |
| static int kvm_s390_get_cmma(struct kvm *kvm, struct kvm_s390_cmma_log *args, |
| u8 *res, unsigned long bufsize) |
| { |
| unsigned long mem_end, cur_gfn, next_gfn, hva, pgstev; |
| struct kvm_memslots *slots = kvm_memslots(kvm); |
| struct kvm_memory_slot *ms; |
| |
| if (unlikely(!slots->used_slots)) |
| return 0; |
| |
| cur_gfn = kvm_s390_next_dirty_cmma(slots, args->start_gfn); |
| ms = gfn_to_memslot(kvm, cur_gfn); |
| args->count = 0; |
| args->start_gfn = cur_gfn; |
| if (!ms) |
| return 0; |
| next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1); |
| mem_end = slots->memslots[0].base_gfn + slots->memslots[0].npages; |
| |
| while (args->count < bufsize) { |
| hva = gfn_to_hva(kvm, cur_gfn); |
| if (kvm_is_error_hva(hva)) |
| return 0; |
| /* Decrement only if we actually flipped the bit to 0 */ |
| if (test_and_clear_bit(cur_gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms))) |
| atomic64_dec(&kvm->arch.cmma_dirty_pages); |
| if (get_pgste(kvm->mm, hva, &pgstev) < 0) |
| pgstev = 0; |
| /* Save the value */ |
| res[args->count++] = (pgstev >> 24) & 0x43; |
| /* If the next bit is too far away, stop. */ |
| if (next_gfn > cur_gfn + KVM_S390_MAX_BIT_DISTANCE) |
| return 0; |
| /* If we reached the previous "next", find the next one */ |
| if (cur_gfn == next_gfn) |
| next_gfn = kvm_s390_next_dirty_cmma(slots, cur_gfn + 1); |
| /* Reached the end of memory or of the buffer, stop */ |
| if ((next_gfn >= mem_end) || |
| (next_gfn - args->start_gfn >= bufsize)) |
| return 0; |
| cur_gfn++; |
| /* Reached the end of the current memslot, take the next one. */ |
| if (cur_gfn - ms->base_gfn >= ms->npages) { |
| ms = gfn_to_memslot(kvm, cur_gfn); |
| if (!ms) |
| return 0; |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * This function searches for the next page with dirty CMMA attributes, and |
| * saves the attributes in the buffer up to either the end of the buffer or |
| * until a block of at least KVM_S390_MAX_BIT_DISTANCE clean bits is found; |
| * no trailing clean bytes are saved. |
| * In case no dirty bits were found, or if CMMA was not enabled or used, the |
| * output buffer will indicate 0 as length. |
| */ |
| static int kvm_s390_get_cmma_bits(struct kvm *kvm, |
| struct kvm_s390_cmma_log *args) |
| { |
| unsigned long bufsize; |
| int srcu_idx, peek, ret; |
| u8 *values; |
| |
| if (!kvm->arch.use_cmma) |
| return -ENXIO; |
| /* Invalid/unsupported flags were specified */ |
| if (args->flags & ~KVM_S390_CMMA_PEEK) |
| return -EINVAL; |
| /* Migration mode query, and we are not doing a migration */ |
| peek = !!(args->flags & KVM_S390_CMMA_PEEK); |
| if (!peek && !kvm->arch.migration_mode) |
| return -EINVAL; |
| /* CMMA is disabled or was not used, or the buffer has length zero */ |
| bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX); |
| if (!bufsize || !kvm->mm->context.uses_cmm) { |
| memset(args, 0, sizeof(*args)); |
| return 0; |
| } |
| /* We are not peeking, and there are no dirty pages */ |
| if (!peek && !atomic64_read(&kvm->arch.cmma_dirty_pages)) { |
| memset(args, 0, sizeof(*args)); |
| return 0; |
| } |
| |
| values = vmalloc(bufsize); |
| if (!values) |
| return -ENOMEM; |
| |
| mmap_read_lock(kvm->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| if (peek) |
| ret = kvm_s390_peek_cmma(kvm, args, values, bufsize); |
| else |
| ret = kvm_s390_get_cmma(kvm, args, values, bufsize); |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(kvm->mm); |
| |
| if (kvm->arch.migration_mode) |
| args->remaining = atomic64_read(&kvm->arch.cmma_dirty_pages); |
| else |
| args->remaining = 0; |
| |
| if (copy_to_user((void __user *)args->values, values, args->count)) |
| ret = -EFAULT; |
| |
| vfree(values); |
| return ret; |
| } |
| |
| /* |
| * This function sets the CMMA attributes for the given pages. If the input |
| * buffer has zero length, no action is taken, otherwise the attributes are |
| * set and the mm->context.uses_cmm flag is set. |
| */ |
| static int kvm_s390_set_cmma_bits(struct kvm *kvm, |
| const struct kvm_s390_cmma_log *args) |
| { |
| unsigned long hva, mask, pgstev, i; |
| uint8_t *bits; |
| int srcu_idx, r = 0; |
| |
| mask = args->mask; |
| |
| if (!kvm->arch.use_cmma) |
| return -ENXIO; |
| /* invalid/unsupported flags */ |
| if (args->flags != 0) |
| return -EINVAL; |
| /* Enforce sane limit on memory allocation */ |
| if (args->count > KVM_S390_CMMA_SIZE_MAX) |
| return -EINVAL; |
| /* Nothing to do */ |
| if (args->count == 0) |
| return 0; |
| |
| bits = vmalloc(array_size(sizeof(*bits), args->count)); |
| if (!bits) |
| return -ENOMEM; |
| |
| r = copy_from_user(bits, (void __user *)args->values, args->count); |
| if (r) { |
| r = -EFAULT; |
| goto out; |
| } |
| |
| mmap_read_lock(kvm->mm); |
| srcu_idx = srcu_read_lock(&kvm->srcu); |
| for (i = 0; i < args->count; i++) { |
| hva = gfn_to_hva(kvm, args->start_gfn + i); |
| if (kvm_is_error_hva(hva)) { |
| r = -EFAULT; |
| break; |
| } |
| |
| pgstev = bits[i]; |
| pgstev = pgstev << 24; |
| mask &= _PGSTE_GPS_USAGE_MASK | _PGSTE_GPS_NODAT; |
| set_pgste_bits(kvm->mm, hva, mask, pgstev); |
| } |
| srcu_read_unlock(&kvm->srcu, srcu_idx); |
| mmap_read_unlock(kvm->mm); |
| |
| if (!kvm->mm->context.uses_cmm) { |
| mmap_write_lock(kvm->mm); |
| kvm->mm->context.uses_cmm = 1; |
| mmap_write_unlock(kvm->mm); |
| } |
| out: |
| vfree(bits); |
| return r; |
| } |
| |
| static int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rcp, u16 *rrcp) |
| { |
| struct kvm_vcpu *vcpu; |
| u16 rc, rrc; |
| int ret = 0; |
| int i; |
| |
| /* |
| * We ignore failures and try to destroy as many CPUs as possible. |
| * At the same time we must not free the assigned resources when |
| * this fails, as the ultravisor has still access to that memory. |
| * So kvm_s390_pv_destroy_cpu can leave a "wanted" memory leak |
| * behind. |
| * We want to return the first failure rc and rrc, though. |
| */ |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| mutex_lock(&vcpu->mutex); |
| if (kvm_s390_pv_destroy_cpu(vcpu, &rc, &rrc) && !ret) { |
| *rcp = rc; |
| *rrcp = rrc; |
| ret = -EIO; |
| } |
| mutex_unlock(&vcpu->mutex); |
| } |
| return ret; |
| } |
| |
| static int kvm_s390_cpus_to_pv(struct kvm *kvm, u16 *rc, u16 *rrc) |
| { |
| int i, r = 0; |
| u16 dummy; |
| |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| mutex_lock(&vcpu->mutex); |
| r = kvm_s390_pv_create_cpu(vcpu, rc, rrc); |
| mutex_unlock(&vcpu->mutex); |
| if (r) |
| break; |
| } |
| if (r) |
| kvm_s390_cpus_from_pv(kvm, &dummy, &dummy); |
| return r; |
| } |
| |
| static int kvm_s390_handle_pv(struct kvm *kvm, struct kvm_pv_cmd *cmd) |
| { |
| int r = 0; |
| u16 dummy; |
| void __user *argp = (void __user *)cmd->data; |
| |
| switch (cmd->cmd) { |
| case KVM_PV_ENABLE: { |
| r = -EINVAL; |
| if (kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| /* |
| * FMT 4 SIE needs esca. As we never switch back to bsca from |
| * esca, we need no cleanup in the error cases below |
| */ |
| r = sca_switch_to_extended(kvm); |
| if (r) |
| break; |
| |
| mmap_write_lock(current->mm); |
| r = gmap_mark_unmergeable(); |
| mmap_write_unlock(current->mm); |
| if (r) |
| break; |
| |
| r = kvm_s390_pv_init_vm(kvm, &cmd->rc, &cmd->rrc); |
| if (r) |
| break; |
| |
| r = kvm_s390_cpus_to_pv(kvm, &cmd->rc, &cmd->rrc); |
| if (r) |
| kvm_s390_pv_deinit_vm(kvm, &dummy, &dummy); |
| |
| /* we need to block service interrupts from now on */ |
| set_bit(IRQ_PEND_EXT_SERVICE, &kvm->arch.float_int.masked_irqs); |
| break; |
| } |
| case KVM_PV_DISABLE: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = kvm_s390_cpus_from_pv(kvm, &cmd->rc, &cmd->rrc); |
| /* |
| * If a CPU could not be destroyed, destroy VM will also fail. |
| * There is no point in trying to destroy it. Instead return |
| * the rc and rrc from the first CPU that failed destroying. |
| */ |
| if (r) |
| break; |
| r = kvm_s390_pv_deinit_vm(kvm, &cmd->rc, &cmd->rrc); |
| |
| /* no need to block service interrupts any more */ |
| clear_bit(IRQ_PEND_EXT_SERVICE, &kvm->arch.float_int.masked_irqs); |
| break; |
| } |
| case KVM_PV_SET_SEC_PARMS: { |
| struct kvm_s390_pv_sec_parm parms = {}; |
| void *hdr; |
| |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = -EFAULT; |
| if (copy_from_user(&parms, argp, sizeof(parms))) |
| break; |
| |
| /* Currently restricted to 8KB */ |
| r = -EINVAL; |
| if (parms.length > PAGE_SIZE * 2) |
| break; |
| |
| r = -ENOMEM; |
| hdr = vmalloc(parms.length); |
| if (!hdr) |
| break; |
| |
| r = -EFAULT; |
| if (!copy_from_user(hdr, (void __user *)parms.origin, |
| parms.length)) |
| r = kvm_s390_pv_set_sec_parms(kvm, hdr, parms.length, |
| &cmd->rc, &cmd->rrc); |
| |
| vfree(hdr); |
| break; |
| } |
| case KVM_PV_UNPACK: { |
| struct kvm_s390_pv_unp unp = {}; |
| |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = -EFAULT; |
| if (copy_from_user(&unp, argp, sizeof(unp))) |
| break; |
| |
| r = kvm_s390_pv_unpack(kvm, unp.addr, unp.size, unp.tweak, |
| &cmd->rc, &cmd->rrc); |
| break; |
| } |
| case KVM_PV_VERIFY: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm), |
| UVC_CMD_VERIFY_IMG, &cmd->rc, &cmd->rrc); |
| KVM_UV_EVENT(kvm, 3, "PROTVIRT VERIFY: rc %x rrc %x", cmd->rc, |
| cmd->rrc); |
| break; |
| } |
| case KVM_PV_PREP_RESET: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm), |
| UVC_CMD_PREPARE_RESET, &cmd->rc, &cmd->rrc); |
| KVM_UV_EVENT(kvm, 3, "PROTVIRT PREP RESET: rc %x rrc %x", |
| cmd->rc, cmd->rrc); |
| break; |
| } |
| case KVM_PV_UNSHARE_ALL: { |
| r = -EINVAL; |
| if (!kvm_s390_pv_is_protected(kvm)) |
| break; |
| |
| r = uv_cmd_nodata(kvm_s390_pv_get_handle(kvm), |
| UVC_CMD_SET_UNSHARE_ALL, &cmd->rc, &cmd->rrc); |
| KVM_UV_EVENT(kvm, 3, "PROTVIRT UNSHARE: rc %x rrc %x", |
| cmd->rc, cmd->rrc); |
| break; |
| } |
| default: |
| r = -ENOTTY; |
| } |
| return r; |
| } |
| |
| long kvm_arch_vm_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| struct kvm *kvm = filp->private_data; |
| void __user *argp = (void __user *)arg; |
| struct kvm_device_attr attr; |
| int r; |
| |
| switch (ioctl) { |
| case KVM_S390_INTERRUPT: { |
| struct kvm_s390_interrupt s390int; |
| |
| r = -EFAULT; |
| if (copy_from_user(&s390int, argp, sizeof(s390int))) |
| break; |
| r = kvm_s390_inject_vm(kvm, &s390int); |
| break; |
| } |
| case KVM_CREATE_IRQCHIP: { |
| struct kvm_irq_routing_entry routing; |
| |
| r = -EINVAL; |
| if (kvm->arch.use_irqchip) { |
| /* Set up dummy routing. */ |
| memset(&routing, 0, sizeof(routing)); |
| r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
| } |
| break; |
| } |
| case KVM_SET_DEVICE_ATTR: { |
| r = -EFAULT; |
| if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| break; |
| r = kvm_s390_vm_set_attr(kvm, &attr); |
| break; |
| } |
| case KVM_GET_DEVICE_ATTR: { |
| r = -EFAULT; |
| if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| break; |
| r = kvm_s390_vm_get_attr(kvm, &attr); |
| break; |
| } |
| case KVM_HAS_DEVICE_ATTR: { |
| r = -EFAULT; |
| if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| break; |
| r = kvm_s390_vm_has_attr(kvm, &attr); |
| break; |
| } |
| case KVM_S390_GET_SKEYS: { |
| struct kvm_s390_skeys args; |
| |
| r = -EFAULT; |
| if (copy_from_user(&args, argp, |
| sizeof(struct kvm_s390_skeys))) |
| break; |
| r = kvm_s390_get_skeys(kvm, &args); |
| break; |
| } |
| case KVM_S390_SET_SKEYS: { |
| struct kvm_s390_skeys args; |
| |
| r = -EFAULT; |
| if (copy_from_user(&args, argp, |
| sizeof(struct kvm_s390_skeys))) |
| break; |
| r = kvm_s390_set_skeys(kvm, &args); |
| break; |
| } |
| case KVM_S390_GET_CMMA_BITS: { |
| struct kvm_s390_cmma_log args; |
| |
| r = -EFAULT; |
| if (copy_from_user(&args, argp, sizeof(args))) |
| break; |
| mutex_lock(&kvm->slots_lock); |
| r = kvm_s390_get_cmma_bits(kvm, &args); |
| mutex_unlock(&kvm->slots_lock); |
| if (!r) { |
| r = copy_to_user(argp, &args, sizeof(args)); |
| if (r) |
| r = -EFAULT; |
| } |
| break; |
| } |
| case KVM_S390_SET_CMMA_BITS: { |
| struct kvm_s390_cmma_log args; |
| |
| r = -EFAULT; |
| if (copy_from_user(&args, argp, sizeof(args))) |
| break; |
| mutex_lock(&kvm->slots_lock); |
| r = kvm_s390_set_cmma_bits(kvm, &args); |
| mutex_unlock(&kvm->slots_lock); |
| break; |
| } |
| case KVM_S390_PV_COMMAND: { |
| struct kvm_pv_cmd args; |
| |
| /* protvirt means user sigp */ |
| kvm->arch.user_cpu_state_ctrl = 1; |
| r = 0; |
| if (!is_prot_virt_host()) { |
| r = -EINVAL; |
| break; |
| } |
| if (copy_from_user(&args, argp, sizeof(args))) { |
| r = -EFAULT; |
| break; |
| } |
| if (args.flags) { |
| r = -EINVAL; |
| break; |
| } |
| mutex_lock(&kvm->lock); |
| r = kvm_s390_handle_pv(kvm, &args); |
| mutex_unlock(&kvm->lock); |
| if (copy_to_user(argp, &args, sizeof(args))) { |
| r = -EFAULT; |
| break; |
| } |
| break; |
| } |
| default: |
| r = -ENOTTY; |
| } |
| |
| return r; |
| } |
| |
| static int kvm_s390_apxa_installed(void) |
| { |
| struct ap_config_info info; |
| |
| if (ap_instructions_available()) { |
| if (ap_qci(&info) == 0) |
| return info.apxa; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * The format of the crypto control block (CRYCB) is specified in the 3 low |
| * order bits of the CRYCB designation (CRYCBD) field as follows: |
| * Format 0: Neither the message security assist extension 3 (MSAX3) nor the |
| * AP extended addressing (APXA) facility are installed. |
| * Format 1: The APXA facility is not installed but the MSAX3 facility is. |
| * Format 2: Both the APXA and MSAX3 facilities are installed |
| */ |
| static void kvm_s390_set_crycb_format(struct kvm *kvm) |
| { |
| kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; |
| |
| /* Clear the CRYCB format bits - i.e., set format 0 by default */ |
| kvm->arch.crypto.crycbd &= ~(CRYCB_FORMAT_MASK); |
| |
| /* Check whether MSAX3 is installed */ |
| if (!test_kvm_facility(kvm, 76)) |
| return; |
| |
| if (kvm_s390_apxa_installed()) |
| kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; |
| else |
| kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; |
| } |
| |
| void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm, |
| unsigned long *aqm, unsigned long *adm) |
| { |
| struct kvm_s390_crypto_cb *crycb = kvm->arch.crypto.crycb; |
| |
| mutex_lock(&kvm->lock); |
| kvm_s390_vcpu_block_all(kvm); |
| |
| switch (kvm->arch.crypto.crycbd & CRYCB_FORMAT_MASK) { |
| case CRYCB_FORMAT2: /* APCB1 use 256 bits */ |
| memcpy(crycb->apcb1.apm, apm, 32); |
| VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx %016lx %016lx %016lx", |
| apm[0], apm[1], apm[2], apm[3]); |
| memcpy(crycb->apcb1.aqm, aqm, 32); |
| VM_EVENT(kvm, 3, "SET CRYCB: aqm %016lx %016lx %016lx %016lx", |
| aqm[0], aqm[1], aqm[2], aqm[3]); |
| memcpy(crycb->apcb1.adm, adm, 32); |
| VM_EVENT(kvm, 3, "SET CRYCB: adm %016lx %016lx %016lx %016lx", |
| adm[0], adm[1], adm[2], adm[3]); |
| break; |
| case CRYCB_FORMAT1: |
| case CRYCB_FORMAT0: /* Fall through both use APCB0 */ |
| memcpy(crycb->apcb0.apm, apm, 8); |
| memcpy(crycb->apcb0.aqm, aqm, 2); |
| memcpy(crycb->apcb0.adm, adm, 2); |
| VM_EVENT(kvm, 3, "SET CRYCB: apm %016lx aqm %04x adm %04x", |
| apm[0], *((unsigned short *)aqm), |
| *((unsigned short *)adm)); |
| break; |
| default: /* Can not happen */ |
| break; |
| } |
| |
| /* recreate the shadow crycb for each vcpu */ |
| kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART); |
| kvm_s390_vcpu_unblock_all(kvm); |
| mutex_unlock(&kvm->lock); |
| } |
| EXPORT_SYMBOL_GPL(kvm_arch_crypto_set_masks); |
| |
| void kvm_arch_crypto_clear_masks(struct kvm *kvm) |
| { |
| mutex_lock(&kvm->lock); |
| kvm_s390_vcpu_block_all(kvm); |
| |
| memset(&kvm->arch.crypto.crycb->apcb0, 0, |
| sizeof(kvm->arch.crypto.crycb->apcb0)); |
| memset(&kvm->arch.crypto.crycb->apcb1, 0, |
| sizeof(kvm->arch.crypto.crycb->apcb1)); |
| |
| VM_EVENT(kvm, 3, "%s", "CLR CRYCB:"); |
| /* recreate the shadow crycb for each vcpu */ |
| kvm_s390_sync_request_broadcast(kvm, KVM_REQ_VSIE_RESTART); |
| kvm_s390_vcpu_unblock_all(kvm); |
| mutex_unlock(&kvm->lock); |
| } |
| EXPORT_SYMBOL_GPL(kvm_arch_crypto_clear_masks); |
| |
| static u64 kvm_s390_get_initial_cpuid(void) |
| { |
| struct cpuid cpuid; |
| |
| get_cpu_id(&cpuid); |
| cpuid.version = 0xff; |
| return *((u64 *) &cpuid); |
| } |
| |
| static void kvm_s390_crypto_init(struct kvm *kvm) |
| { |
| kvm->arch.crypto.crycb = &kvm->arch.sie_page2->crycb; |
| kvm_s390_set_crycb_format(kvm); |
| |
| if (!test_kvm_facility(kvm, 76)) |
| return; |
| |
| /* Enable AES/DEA protected key functions by default */ |
| kvm->arch.crypto.aes_kw = 1; |
| kvm->arch.crypto.dea_kw = 1; |
| get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, |
| sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); |
| get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, |
| sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); |
| } |
| |
| static void sca_dispose(struct kvm *kvm) |
| { |
| if (kvm->arch.use_esca) |
| free_pages_exact(kvm->arch.sca, sizeof(struct esca_block)); |
| else |
| free_page((unsigned long)(kvm->arch.sca)); |
| kvm->arch.sca = NULL; |
| } |
| |
| int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
| { |
| gfp_t alloc_flags = GFP_KERNEL; |
| int i, rc; |
| char debug_name[16]; |
| static unsigned long sca_offset; |
| |
| rc = -EINVAL; |
| #ifdef CONFIG_KVM_S390_UCONTROL |
| if (type & ~KVM_VM_S390_UCONTROL) |
| goto out_err; |
| if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) |
| goto out_err; |
| #else |
| if (type) |
| goto out_err; |
| #endif |
| |
| rc = s390_enable_sie(); |
| if (rc) |
| goto out_err; |
| |
| rc = -ENOMEM; |
| |
| if (!sclp.has_64bscao) |
| alloc_flags |= GFP_DMA; |
| rwlock_init(&kvm->arch.sca_lock); |
| /* start with basic SCA */ |
| kvm->arch.sca = (struct bsca_block *) get_zeroed_page(alloc_flags); |
| if (!kvm->arch.sca) |
| goto out_err; |
| mutex_lock(&kvm_lock); |
| sca_offset += 16; |
| if (sca_offset + sizeof(struct bsca_block) > PAGE_SIZE) |
| sca_offset = 0; |
| kvm->arch.sca = (struct bsca_block *) |
| ((char *) kvm->arch.sca + sca_offset); |
| mutex_unlock(&kvm_lock); |
| |
| sprintf(debug_name, "kvm-%u", current->pid); |
| |
| kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
| if (!kvm->arch.dbf) |
| goto out_err; |
| |
| BUILD_BUG_ON(sizeof(struct sie_page2) != 4096); |
| kvm->arch.sie_page2 = |
| (struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| if (!kvm->arch.sie_page2) |
| goto out_err; |
| |
| kvm->arch.sie_page2->kvm = kvm; |
| kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list; |
| |
| for (i = 0; i < kvm_s390_fac_size(); i++) { |
| kvm->arch.model.fac_mask[i] = S390_lowcore.stfle_fac_list[i] & |
| (kvm_s390_fac_base[i] | |
| kvm_s390_fac_ext[i]); |
| kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] & |
| kvm_s390_fac_base[i]; |
| } |
| kvm->arch.model.subfuncs = kvm_s390_available_subfunc; |
| |
| /* we are always in czam mode - even on pre z14 machines */ |
| set_kvm_facility(kvm->arch.model.fac_mask, 138); |
| set_kvm_facility(kvm->arch.model.fac_list, 138); |
| /* we emulate STHYI in kvm */ |
| set_kvm_facility(kvm->arch.model.fac_mask, 74); |
| set_kvm_facility(kvm->arch.model.fac_list, 74); |
| if (MACHINE_HAS_TLB_GUEST) { |
| set_kvm_facility(kvm->arch.model.fac_mask, 147); |
| set_kvm_facility(kvm->arch.model.fac_list, 147); |
| } |
| |
| if (css_general_characteristics.aiv && test_facility(65)) |
| set_kvm_facility(kvm->arch.model.fac_mask, 65); |
| |
| kvm->arch.model.cpuid = kvm_s390_get_initial_cpuid(); |
| kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
| |
| kvm_s390_crypto_init(kvm); |
| |
| mutex_init(&kvm->arch.float_int.ais_lock); |
| spin_lock_init(&kvm->arch.float_int.lock); |
| for (i = 0; i < FIRQ_LIST_COUNT; i++) |
| INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); |
| init_waitqueue_head(&kvm->arch.ipte_wq); |
| mutex_init(&kvm->arch.ipte_mutex); |
| |
| debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
| VM_EVENT(kvm, 3, "vm created with type %lu", type); |
| |
| if (type & KVM_VM_S390_UCONTROL) { |
| kvm->arch.gmap = NULL; |
| kvm->arch.mem_limit = KVM_S390_NO_MEM_LIMIT; |
| } else { |
| if (sclp.hamax == U64_MAX) |
| kvm->arch.mem_limit = TASK_SIZE_MAX; |
| else |
| kvm->arch.mem_limit = min_t(unsigned long, TASK_SIZE_MAX, |
| sclp.hamax + 1); |
| kvm->arch.gmap = gmap_create(current->mm, kvm->arch.mem_limit - 1); |
| if (!kvm->arch.gmap) |
| goto out_err; |
| kvm->arch.gmap->private = kvm; |
| kvm->arch.gmap->pfault_enabled = 0; |
| } |
| |
| kvm->arch.use_pfmfi = sclp.has_pfmfi; |
| kvm->arch.use_skf = sclp.has_skey; |
| spin_lock_init(&kvm->arch.start_stop_lock); |
| kvm_s390_vsie_init(kvm); |
| if (use_gisa) |
| kvm_s390_gisa_init(kvm); |
| KVM_EVENT(3, "vm 0x%pK created by pid %u", kvm, current->pid); |
| |
| return 0; |
| out_err: |
| free_page((unsigned long)kvm->arch.sie_page2); |
| debug_unregister(kvm->arch.dbf); |
| sca_dispose(kvm); |
| KVM_EVENT(3, "creation of vm failed: %d", rc); |
| return rc; |
| } |
| |
| void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
| { |
| u16 rc, rrc; |
| |
| VCPU_EVENT(vcpu, 3, "%s", "free cpu"); |
| trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
| kvm_s390_clear_local_irqs(vcpu); |
| kvm_clear_async_pf_completion_queue(vcpu); |
| if (!kvm_is_ucontrol(vcpu->kvm)) |
| sca_del_vcpu(vcpu); |
| |
| if (kvm_is_ucontrol(vcpu->kvm)) |
| gmap_remove(vcpu->arch.gmap); |
| |
| if (vcpu->kvm->arch.use_cmma) |
| kvm_s390_vcpu_unsetup_cmma(vcpu); |
| /* We can not hold the vcpu mutex here, we are already dying */ |
| if (kvm_s390_pv_cpu_get_handle(vcpu)) |
| kvm_s390_pv_destroy_cpu(vcpu, &rc, &rrc); |
| free_page((unsigned long)(vcpu->arch.sie_block)); |
| } |
| |
| static void kvm_free_vcpus(struct kvm *kvm) |
| { |
| unsigned int i; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) |
| kvm_vcpu_destroy(vcpu); |
| |
| mutex_lock(&kvm->lock); |
| for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) |
| kvm->vcpus[i] = NULL; |
| |
| atomic_set(&kvm->online_vcpus, 0); |
| mutex_unlock(&kvm->lock); |
| } |
| |
| void kvm_arch_destroy_vm(struct kvm *kvm) |
| { |
| u16 rc, rrc; |
| |
| kvm_free_vcpus(kvm); |
| sca_dispose(kvm); |
| kvm_s390_gisa_destroy(kvm); |
| /* |
| * We are already at the end of life and kvm->lock is not taken. |
| * This is ok as the file descriptor is closed by now and nobody |
| * can mess with the pv state. To avoid lockdep_assert_held from |
| * complaining we do not use kvm_s390_pv_is_protected. |
| */ |
| if (kvm_s390_pv_get_handle(kvm)) |
| kvm_s390_pv_deinit_vm(kvm, &rc, &rrc); |
| debug_unregister(kvm->arch.dbf); |
| free_page((unsigned long)kvm->arch.sie_page2); |
| if (!kvm_is_ucontrol(kvm)) |
| gmap_remove(kvm->arch.gmap); |
| kvm_s390_destroy_adapters(kvm); |
| kvm_s390_clear_float_irqs(kvm); |
| kvm_s390_vsie_destroy(kvm); |
| KVM_EVENT(3, "vm 0x%pK destroyed", kvm); |
| } |
| |
| /* Section: vcpu related */ |
| static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.gmap = gmap_create(current->mm, -1UL); |
| if (!vcpu->arch.gmap) |
| return -ENOMEM; |
| vcpu->arch.gmap->private = vcpu->kvm; |
| |
| return 0; |
| } |
| |
| static void sca_del_vcpu(struct kvm_vcpu *vcpu) |
| { |
| if (!kvm_s390_use_sca_entries()) |
| return; |
| read_lock(&vcpu->kvm->arch.sca_lock); |
| if (vcpu->kvm->arch.use_esca) { |
| struct esca_block *sca = vcpu->kvm->arch.sca; |
| |
| clear_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
| sca->cpu[vcpu->vcpu_id].sda = 0; |
| } else { |
| struct bsca_block *sca = vcpu->kvm->arch.sca; |
| |
| clear_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
| sca->cpu[vcpu->vcpu_id].sda = 0; |
| } |
| read_unlock(&vcpu->kvm->arch.sca_lock); |
| } |
| |
| static void sca_add_vcpu(struct kvm_vcpu *vcpu) |
| { |
| if (!kvm_s390_use_sca_entries()) { |
| struct bsca_block *sca = vcpu->kvm->arch.sca; |
| |
| /* we still need the basic sca for the ipte control */ |
| vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
| vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; |
| return; |
| } |
| read_lock(&vcpu->kvm->arch.sca_lock); |
| if (vcpu->kvm->arch.use_esca) { |
| struct esca_block *sca = vcpu->kvm->arch.sca; |
| |
| sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
| vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
| vcpu->arch.sie_block->scaol = (__u32)(__u64)sca & ~0x3fU; |
| vcpu->arch.sie_block->ecb2 |= ECB2_ESCA; |
| set_bit_inv(vcpu->vcpu_id, (unsigned long *) sca->mcn); |
| } else { |
| struct bsca_block *sca = vcpu->kvm->arch.sca; |
| |
| sca->cpu[vcpu->vcpu_id].sda = (__u64) vcpu->arch.sie_block; |
| vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32); |
| vcpu->arch.sie_block->scaol = (__u32)(__u64)sca; |
| set_bit_inv(vcpu->vcpu_id, (unsigned long *) &sca->mcn); |
| } |
| read_unlock(&vcpu->kvm->arch.sca_lock); |
| } |
| |
| /* Basic SCA to Extended SCA data copy routines */ |
| static inline void sca_copy_entry(struct esca_entry *d, struct bsca_entry *s) |
| { |
| d->sda = s->sda; |
| d->sigp_ctrl.c = s->sigp_ctrl.c; |
| d->sigp_ctrl.scn = s->sigp_ctrl.scn; |
| } |
| |
| static void sca_copy_b_to_e(struct esca_block *d, struct bsca_block *s) |
| { |
| int i; |
| |
| d->ipte_control = s->ipte_control; |
| d->mcn[0] = s->mcn; |
| for (i = 0; i < KVM_S390_BSCA_CPU_SLOTS; i++) |
| sca_copy_entry(&d->cpu[i], &s->cpu[i]); |
| } |
| |
| static int sca_switch_to_extended(struct kvm *kvm) |
| { |
| struct bsca_block *old_sca = kvm->arch.sca; |
| struct esca_block *new_sca; |
| struct kvm_vcpu *vcpu; |
| unsigned int vcpu_idx; |
| u32 scaol, scaoh; |
| |
| if (kvm->arch.use_esca) |
| return 0; |
| |
| new_sca = alloc_pages_exact(sizeof(*new_sca), GFP_KERNEL|__GFP_ZERO); |
| if (!new_sca) |
| return -ENOMEM; |
| |
| scaoh = (u32)((u64)(new_sca) >> 32); |
| scaol = (u32)(u64)(new_sca) & ~0x3fU; |
| |
| kvm_s390_vcpu_block_all(kvm); |
| write_lock(&kvm->arch.sca_lock); |
| |
| sca_copy_b_to_e(new_sca, old_sca); |
| |
| kvm_for_each_vcpu(vcpu_idx, vcpu, kvm) { |
| vcpu->arch.sie_block->scaoh = scaoh; |
| vcpu->arch.sie_block->scaol = scaol; |
| vcpu->arch.sie_block->ecb2 |= ECB2_ESCA; |
| } |
| kvm->arch.sca = new_sca; |
| kvm->arch.use_esca = 1; |
| |
| write_unlock(&kvm->arch.sca_lock); |
| kvm_s390_vcpu_unblock_all(kvm); |
| |
| free_page((unsigned long)old_sca); |
| |
| VM_EVENT(kvm, 2, "Switched to ESCA (0x%pK -> 0x%pK)", |
| old_sca, kvm->arch.sca); |
| return 0; |
| } |
| |
| static int sca_can_add_vcpu(struct kvm *kvm, unsigned int id) |
| { |
| int rc; |
| |
| if (!kvm_s390_use_sca_entries()) { |
| if (id < KVM_MAX_VCPUS) |
| return true; |
| return false; |
| } |
| if (id < KVM_S390_BSCA_CPU_SLOTS) |
| return true; |
| if (!sclp.has_esca || !sclp.has_64bscao) |
| return false; |
| |
| mutex_lock(&kvm->lock); |
| rc = kvm->arch.use_esca ? 0 : sca_switch_to_extended(kvm); |
| mutex_unlock(&kvm->lock); |
| |
| return rc == 0 && id < KVM_S390_ESCA_CPU_SLOTS; |
| } |
| |
| /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
| static void __start_cpu_timer_accounting(struct kvm_vcpu *vcpu) |
| { |
| WARN_ON_ONCE(vcpu->arch.cputm_start != 0); |
| raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
| vcpu->arch.cputm_start = get_tod_clock_fast(); |
| raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
| } |
| |
| /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
| static void __stop_cpu_timer_accounting(struct kvm_vcpu *vcpu) |
| { |
| WARN_ON_ONCE(vcpu->arch.cputm_start == 0); |
| raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
| vcpu->arch.sie_block->cputm -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
| vcpu->arch.cputm_start = 0; |
| raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
| } |
| |
| /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
| static void __enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) |
| { |
| WARN_ON_ONCE(vcpu->arch.cputm_enabled); |
| vcpu->arch.cputm_enabled = true; |
| __start_cpu_timer_accounting(vcpu); |
| } |
| |
| /* needs disabled preemption to protect from TOD sync and vcpu_load/put */ |
| static void __disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) |
| { |
| WARN_ON_ONCE(!vcpu->arch.cputm_enabled); |
| __stop_cpu_timer_accounting(vcpu); |
| vcpu->arch.cputm_enabled = false; |
| } |
| |
| static void enable_cpu_timer_accounting(struct kvm_vcpu *vcpu) |
| { |
| preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
| __enable_cpu_timer_accounting(vcpu); |
| preempt_enable(); |
| } |
| |
| static void disable_cpu_timer_accounting(struct kvm_vcpu *vcpu) |
| { |
| preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
| __disable_cpu_timer_accounting(vcpu); |
| preempt_enable(); |
| } |
| |
| /* set the cpu timer - may only be called from the VCPU thread itself */ |
| void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm) |
| { |
| preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
| raw_write_seqcount_begin(&vcpu->arch.cputm_seqcount); |
| if (vcpu->arch.cputm_enabled) |
| vcpu->arch.cputm_start = get_tod_clock_fast(); |
| vcpu->arch.sie_block->cputm = cputm; |
| raw_write_seqcount_end(&vcpu->arch.cputm_seqcount); |
| preempt_enable(); |
| } |
| |
| /* update and get the cpu timer - can also be called from other VCPU threads */ |
| __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu) |
| { |
| unsigned int seq; |
| __u64 value; |
| |
| if (unlikely(!vcpu->arch.cputm_enabled)) |
| return vcpu->arch.sie_block->cputm; |
| |
| preempt_disable(); /* protect from TOD sync and vcpu_load/put */ |
| do { |
| seq = raw_read_seqcount(&vcpu->arch.cputm_seqcount); |
| /* |
| * If the writer would ever execute a read in the critical |
| * section, e.g. in irq context, we have a deadlock. |
| */ |
| WARN_ON_ONCE((seq & 1) && smp_processor_id() == vcpu->cpu); |
| value = vcpu->arch.sie_block->cputm; |
| /* if cputm_start is 0, accounting is being started/stopped */ |
| if (likely(vcpu->arch.cputm_start)) |
| value -= get_tod_clock_fast() - vcpu->arch.cputm_start; |
| } while (read_seqcount_retry(&vcpu->arch.cputm_seqcount, seq & ~1)); |
| preempt_enable(); |
| return value; |
| } |
| |
| void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| { |
| |
| gmap_enable(vcpu->arch.enabled_gmap); |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_RUNNING); |
| if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
| __start_cpu_timer_accounting(vcpu); |
| vcpu->cpu = cpu; |
| } |
| |
| void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| { |
| vcpu->cpu = -1; |
| if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu)) |
| __stop_cpu_timer_accounting(vcpu); |
| kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING); |
| vcpu->arch.enabled_gmap = gmap_get_enabled(); |
| gmap_disable(vcpu->arch.enabled_gmap); |
| |
| } |
| |
| void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
| { |
| mutex_lock(&vcpu->kvm->lock); |
| preempt_disable(); |
| vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
| vcpu->arch.sie_block->epdx = vcpu->kvm->arch.epdx; |
| preempt_enable(); |
| mutex_unlock(&vcpu->kvm->lock); |
| if (!kvm_is_ucontrol(vcpu->kvm)) { |
| vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
| sca_add_vcpu(vcpu); |
| } |
| if (test_kvm_facility(vcpu->kvm, 74) || vcpu->kvm->arch.user_instr0) |
| vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; |
| /* make vcpu_load load the right gmap on the first trigger */ |
| vcpu->arch.enabled_gmap = vcpu->arch.gmap; |
| } |
| |
| static bool kvm_has_pckmo_subfunc(struct kvm *kvm, unsigned long nr) |
| { |
| if (test_bit_inv(nr, (unsigned long *)&kvm->arch.model.subfuncs.pckmo) && |
| test_bit_inv(nr, (unsigned long *)&kvm_s390_available_subfunc.pckmo)) |
| return true; |
| return false; |
| } |
| |
| static bool kvm_has_pckmo_ecc(struct kvm *kvm) |
| { |
| /* At least one ECC subfunction must be present */ |
| return kvm_has_pckmo_subfunc(kvm, 32) || |
| kvm_has_pckmo_subfunc(kvm, 33) || |
| kvm_has_pckmo_subfunc(kvm, 34) || |
| kvm_has_pckmo_subfunc(kvm, 40) || |
| kvm_has_pckmo_subfunc(kvm, 41); |
| |
| } |
| |
| static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
| { |
| /* |
| * If the AP instructions are not being interpreted and the MSAX3 |
| * facility is not configured for the guest, there is nothing to set up. |
| */ |
| if (!vcpu->kvm->arch.crypto.apie && !test_kvm_facility(vcpu->kvm, 76)) |
| return; |
| |
| vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
| vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
| vcpu->arch.sie_block->eca &= ~ECA_APIE; |
| vcpu->arch.sie_block->ecd &= ~ECD_ECC; |
| |
| if (vcpu->kvm->arch.crypto.apie) |
| vcpu->arch.sie_block->eca |= ECA_APIE; |
| |
| /* Set up protected key support */ |
| if (vcpu->kvm->arch.crypto.aes_kw) { |
| vcpu->arch.sie_block->ecb3 |= ECB3_AES; |
| /* ecc is also wrapped with AES key */ |
| if (kvm_has_pckmo_ecc(vcpu->kvm)) |
| vcpu->arch.sie_block->ecd |= ECD_ECC; |
| } |
| |
| if (vcpu->kvm->arch.crypto.dea_kw) |
| vcpu->arch.sie_block->ecb3 |= ECB3_DEA; |
| } |
| |
| void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
| { |
| free_page(vcpu->arch.sie_block->cbrlo); |
| vcpu->arch.sie_block->cbrlo = 0; |
| } |
| |
| int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); |
| if (!vcpu->arch.sie_block->cbrlo) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; |
| |
| vcpu->arch.sie_block->ibc = model->ibc; |
| if (test_kvm_facility(vcpu->kvm, 7)) |
| vcpu->arch.sie_block->fac = (u32)(u64) model->fac_list; |
| } |
| |
| static int kvm_s390_vcpu_setup(struct kvm_vcpu *vcpu) |
| { |
| int rc = 0; |
| u16 uvrc, uvrrc; |
| |
| atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
| CPUSTAT_SM | |
| CPUSTAT_STOPPED); |
| |
| if (test_kvm_facility(vcpu->kvm, 78)) |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED2); |
| else if (test_kvm_facility(vcpu->kvm, 8)) |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_GED); |
| |
| kvm_s390_vcpu_setup_model(vcpu); |
| |
| /* pgste_set_pte has special handling for !MACHINE_HAS_ESOP */ |
| if (MACHINE_HAS_ESOP) |
| vcpu->arch.sie_block->ecb |= ECB_HOSTPROTINT; |
| if (test_kvm_facility(vcpu->kvm, 9)) |
| vcpu->arch.sie_block->ecb |= ECB_SRSI; |
| if (test_kvm_facility(vcpu->kvm, 73)) |
| vcpu->arch.sie_block->ecb |= ECB_TE; |
| |
| if (test_kvm_facility(vcpu->kvm, 8) && vcpu->kvm->arch.use_pfmfi) |
| vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI; |
| if (test_kvm_facility(vcpu->kvm, 130)) |
| vcpu->arch.sie_block->ecb2 |= ECB2_IEP; |
| vcpu->arch.sie_block->eca = ECA_MVPGI | ECA_PROTEXCI; |
| if (sclp.has_cei) |
| vcpu->arch.sie_block->eca |= ECA_CEI; |
| if (sclp.has_ib) |
| vcpu->arch.sie_block->eca |= ECA_IB; |
| if (sclp.has_siif) |
| vcpu->arch.sie_block->eca |= ECA_SII; |
| if (sclp.has_sigpif) |
| vcpu->arch.sie_block->eca |= ECA_SIGPI; |
| if (test_kvm_facility(vcpu->kvm, 129)) { |
| vcpu->arch.sie_block->eca |= ECA_VX; |
| vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT; |
| } |
| if (test_kvm_facility(vcpu->kvm, 139)) |
| vcpu->arch.sie_block->ecd |= ECD_MEF; |
| if (test_kvm_facility(vcpu->kvm, 156)) |
| vcpu->arch.sie_block->ecd |= ECD_ETOKENF; |
| if (vcpu->arch.sie_block->gd) { |
| vcpu->arch.sie_block->eca |= ECA_AIV; |
| VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u", |
| vcpu->arch.sie_block->gd & 0x3, vcpu->vcpu_id); |
| } |
| vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx) |
| | SDNXC; |
| vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb; |
| |
| if (sclp.has_kss) |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_KSS); |
| else |
| vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
| |
| if (vcpu->kvm->arch.use_cmma) { |
| rc = kvm_s390_vcpu_setup_cmma(vcpu); |
| if (rc) |
| return rc; |
| } |
| hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
| vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
| |
| vcpu->arch.sie_block->hpid = HPID_KVM; |
| |
| kvm_s390_vcpu_crypto_setup(vcpu); |
| |
| mutex_lock(&vcpu->kvm->lock); |
| if (kvm_s390_pv_is_protected(vcpu->kvm)) { |
| rc = kvm_s390_pv_create_cpu(vcpu, &uvrc, &uvrrc); |
| if (rc) |
| kvm_s390_vcpu_unsetup_cmma(vcpu); |
| } |
| mutex_unlock(&vcpu->kvm->lock); |
| |
| return rc; |
| } |
| |
| int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) |
| { |
| if (!kvm_is_ucontrol(kvm) && !sca_can_add_vcpu(kvm, id)) |
| return -EINVAL; |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) |
| { |
| struct sie_page *sie_page; |
| int rc; |
| |
| BUILD_BUG_ON(sizeof(struct sie_page) != 4096); |
| sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
| if (!sie_page) |
| return -ENOMEM; |
| |
| vcpu->arch.sie_block = &sie_page->sie_block; |
| vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; |
| |
| /* the real guest size will always be smaller than msl */ |
| vcpu->arch.sie_block->mso = 0; |
| vcpu->arch.sie_block->msl = sclp.hamax; |
| |
| vcpu->arch.sie_block->icpua = vcpu->vcpu_id; |
| spin_lock_init(&vcpu->arch.local_int.lock); |
| vcpu->arch.sie_block->gd = (u32)(u64)vcpu->kvm->arch.gisa_int.origin; |
| if (vcpu->arch.sie_block->gd && sclp.has_gisaf) |
| vcpu->arch.sie_block->gd |= GISA_FORMAT1; |
| seqcount_init(&vcpu->arch.cputm_seqcount); |
| |
| vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| kvm_clear_async_pf_completion_queue(vcpu); |
| vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
| KVM_SYNC_GPRS | |
| KVM_SYNC_ACRS | |
| KVM_SYNC_CRS | |
| KVM_SYNC_ARCH0 | |
| KVM_SYNC_PFAULT; |
| kvm_s390_set_prefix(vcpu, 0); |
| if (test_kvm_facility(vcpu->kvm, 64)) |
| vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB; |
| if (test_kvm_facility(vcpu->kvm, 82)) |
| vcpu->run->kvm_valid_regs |= KVM_SYNC_BPBC; |
| if (test_kvm_facility(vcpu->kvm, 133)) |
| vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB; |
| if (test_kvm_facility(vcpu->kvm, 156)) |
| vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN; |
| /* fprs can be synchronized via vrs, even if the guest has no vx. With |
| * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format. |
| */ |
| if (MACHINE_HAS_VX) |
| vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; |
| else |
| vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS; |
| |
| if (kvm_is_ucontrol(vcpu->kvm)) { |
| rc = __kvm_ucontrol_vcpu_init(vcpu); |
| if (rc) |
| goto out_free_sie_block; |
| } |
| |
| VM_EVENT(vcpu->kvm, 3, "create cpu %d at 0x%pK, sie block at 0x%pK", |
| vcpu->vcpu_id, vcpu, vcpu->arch.sie_block); |
| trace_kvm_s390_create_vcpu(vcpu->vcpu_id, vcpu, vcpu->arch.sie_block); |
| |
| rc = kvm_s390_vcpu_setup(vcpu); |
| if (rc) |
| goto out_ucontrol_uninit; |
| return 0; |
| |
| out_ucontrol_uninit: |
| if (kvm_is_ucontrol(vcpu->kvm)) |
| gmap_remove(vcpu->arch.gmap); |
| out_free_sie_block: |
| free_page((unsigned long)(vcpu->arch.sie_block)); |
| return rc; |
| } |
| |
| int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
| { |
| return kvm_s390_vcpu_has_irq(vcpu, 0); |
| } |
| |
| bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) |
| { |
| return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE); |
| } |
| |
| void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
| { |
| atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| exit_sie(vcpu); |
| } |
| |
| void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
| { |
| atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
| } |
| |
| static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
| { |
| atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
| exit_sie(vcpu); |
| } |
| |
| bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu) |
| { |
| return atomic_read(&vcpu->arch.sie_block->prog20) & |
| (PROG_BLOCK_SIE | PROG_REQUEST); |
| } |
| |
| static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) |
| { |
| atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
| } |
| |
| /* |
| * Kick a guest cpu out of (v)SIE and wait until (v)SIE is not running. |
| * If the CPU is not running (e.g. waiting as idle) the function will |
| * return immediately. */ |
| void exit_sie(struct kvm_vcpu *vcpu) |
| { |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); |
| kvm_s390_vsie_kick(vcpu); |
| while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
| cpu_relax(); |
| } |
| |
| /* Kick a guest cpu out of SIE to process a request synchronously */ |
| void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) |
| { |
| kvm_make_request(req, vcpu); |
| kvm_s390_vcpu_request(vcpu); |
| } |
| |
| static void kvm_gmap_notifier(struct gmap *gmap, unsigned long start, |
| unsigned long end) |
| { |
| struct kvm *kvm = gmap->private; |
| struct kvm_vcpu *vcpu; |
| unsigned long prefix; |
| int i; |
| |
| if (gmap_is_shadow(gmap)) |
| return; |
| if (start >= 1UL << 31) |
| /* We are only interested in prefix pages */ |
| return; |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| /* match against both prefix pages */ |
| prefix = kvm_s390_get_prefix(vcpu); |
| if (prefix <= end && start <= prefix + 2*PAGE_SIZE - 1) { |
| VCPU_EVENT(vcpu, 2, "gmap notifier for %lx-%lx", |
| start, end); |
| kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
| } |
| } |
| } |
| |
| bool kvm_arch_no_poll(struct kvm_vcpu *vcpu) |
| { |
| /* do not poll with more than halt_poll_max_steal percent of steal time */ |
| if (S390_lowcore.avg_steal_timer * 100 / (TICK_USEC << 12) >= |
| halt_poll_max_steal) { |
| vcpu->stat.halt_no_poll_steal++; |
| return true; |
| } |
| return false; |
| } |
| |
| int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
| { |
| /* kvm common code refers to this, but never calls it */ |
| BUG(); |
| return 0; |
| } |
| |
| static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
| struct kvm_one_reg *reg) |
| { |
| int r = -EINVAL; |
| |
| switch (reg->id) { |
| case KVM_REG_S390_TODPR: |
| r = put_user(vcpu->arch.sie_block->todpr, |
| (u32 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_EPOCHDIFF: |
| r = put_user(vcpu->arch.sie_block->epoch, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_CPU_TIMER: |
| r = put_user(kvm_s390_get_cpu_timer(vcpu), |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_CLOCK_COMP: |
| r = put_user(vcpu->arch.sie_block->ckc, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_PFTOKEN: |
| r = put_user(vcpu->arch.pfault_token, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_PFCOMPARE: |
| r = put_user(vcpu->arch.pfault_compare, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_PFSELECT: |
| r = put_user(vcpu->arch.pfault_select, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_PP: |
| r = put_user(vcpu->arch.sie_block->pp, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_GBEA: |
| r = put_user(vcpu->arch.sie_block->gbea, |
| (u64 __user *)reg->addr); |
| break; |
| default: |
| break; |
| } |
| |
| return r; |
| } |
| |
| static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, |
| struct kvm_one_reg *reg) |
| { |
| int r = -EINVAL; |
| __u64 val; |
| |
| switch (reg->id) { |
| case KVM_REG_S390_TODPR: |
| r = get_user(vcpu->arch.sie_block->todpr, |
| (u32 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_EPOCHDIFF: |
| r = get_user(vcpu->arch.sie_block->epoch, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_CPU_TIMER: |
| r = get_user(val, (u64 __user *)reg->addr); |
| if (!r) |
| kvm_s390_set_cpu_timer(vcpu, val); |
| break; |
| case KVM_REG_S390_CLOCK_COMP: |
| r = get_user(vcpu->arch.sie_block->ckc, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_PFTOKEN: |
| r = get_user(vcpu->arch.pfault_token, |
| (u64 __user *)reg->addr); |
| if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
| kvm_clear_async_pf_completion_queue(vcpu); |
| break; |
| case KVM_REG_S390_PFCOMPARE: |
| r = get_user(vcpu->arch.pfault_compare, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_PFSELECT: |
| r = get_user(vcpu->arch.pfault_select, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_PP: |
| r = get_user(vcpu->arch.sie_block->pp, |
| (u64 __user *)reg->addr); |
| break; |
| case KVM_REG_S390_GBEA: |
| r = get_user(vcpu->arch.sie_block->gbea, |
| (u64 __user *)reg->addr); |
| break; |
| default: |
| break; |
| } |
| |
| return r; |
| } |
| |
| static void kvm_arch_vcpu_ioctl_normal_reset(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.sie_block->gpsw.mask &= ~PSW_MASK_RI; |
| vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
| memset(vcpu->run->s.regs.riccb, 0, sizeof(vcpu->run->s.regs.riccb)); |
| |
| kvm_clear_async_pf_completion_queue(vcpu); |
| if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
| kvm_s390_vcpu_stop(vcpu); |
| kvm_s390_clear_local_irqs(vcpu); |
| } |
| |
| static void kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
| { |
| /* Initial reset is a superset of the normal reset */ |
| kvm_arch_vcpu_ioctl_normal_reset(vcpu); |
| |
| /* |
| * This equals initial cpu reset in pop, but we don't switch to ESA. |
| * We do not only reset the internal data, but also ... |
| */ |
| vcpu->arch.sie_block->gpsw.mask = 0; |
| vcpu->arch.sie_block->gpsw.addr = 0; |
| kvm_s390_set_prefix(vcpu, 0); |
| kvm_s390_set_cpu_timer(vcpu, 0); |
| vcpu->arch.sie_block->ckc = 0; |
| memset(vcpu->arch.sie_block->gcr, 0, sizeof(vcpu->arch.sie_block->gcr)); |
| vcpu->arch.sie_block->gcr[0] = CR0_INITIAL_MASK; |
| vcpu->arch.sie_block->gcr[14] = CR14_INITIAL_MASK; |
| |
| /* ... the data in sync regs */ |
| memset(vcpu->run->s.regs.crs, 0, sizeof(vcpu->run->s.regs.crs)); |
| vcpu->run->s.regs.ckc = 0; |
| vcpu->run->s.regs.crs[0] = CR0_INITIAL_MASK; |
| vcpu->run->s.regs.crs[14] = CR14_INITIAL_MASK; |
| vcpu->run->psw_addr = 0; |
| vcpu->run->psw_mask = 0; |
| vcpu->run->s.regs.todpr = 0; |
| vcpu->run->s.regs.cputm = 0; |
| vcpu->run->s.regs.ckc = 0; |
| vcpu->run->s.regs.pp = 0; |
| vcpu->run->s.regs.gbea = 1; |
| vcpu->run->s.regs.fpc = 0; |
| /* |
| * Do not reset these registers in the protected case, as some of |
| * them are overlayed and they are not accessible in this case |
| * anyway. |
| */ |
| if (!kvm_s390_pv_cpu_is_protected(vcpu)) { |
| vcpu->arch.sie_block->gbea = 1; |
| vcpu->arch.sie_block->pp = 0; |
| vcpu->arch.sie_block->fpf &= ~FPF_BPBC; |
| vcpu->arch.sie_block->todpr = 0; |
| } |
| } |
| |
| static void kvm_arch_vcpu_ioctl_clear_reset(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_sync_regs *regs = &vcpu->run->s.regs; |
| |
| /* Clear reset is a superset of the initial reset */ |
| kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
| |
| memset(®s->gprs, 0, sizeof(regs->gprs)); |
| memset(®s->vrs, 0, sizeof(regs->vrs)); |
| memset(®s->acrs, 0, sizeof(regs->acrs)); |
| memset(®s->gscb, 0, sizeof(regs->gscb)); |
| |
| regs->etoken = 0; |
| regs->etoken_extension = 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| { |
| vcpu_load(vcpu); |
| memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
| vcpu_put(vcpu); |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
| { |
| vcpu_load(vcpu); |
| memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
| vcpu_put(vcpu); |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| vcpu_load(vcpu); |
| |
| memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
| memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
| |
| vcpu_put(vcpu); |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
| struct kvm_sregs *sregs) |
| { |
| vcpu_load(vcpu); |
| |
| memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
| memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
| |
| vcpu_put(vcpu); |
| return 0; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| { |
| int ret = 0; |
| |
| vcpu_load(vcpu); |
| |
| if (test_fp_ctl(fpu->fpc)) { |
| ret = -EINVAL; |
| goto out; |
| } |
| vcpu->run->s.regs.fpc = fpu->fpc; |
| if (MACHINE_HAS_VX) |
| convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs, |
| (freg_t *) fpu->fprs); |
| else |
| memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
| |
| out: |
| vcpu_put(vcpu); |
| return ret; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
| { |
| vcpu_load(vcpu); |
| |
| /* make sure we have the latest values */ |
| save_fpu_regs(); |
| if (MACHINE_HAS_VX) |
| convert_vx_to_fp((freg_t *) fpu->fprs, |
| (__vector128 *) vcpu->run->s.regs.vrs); |
| else |
| memcpy(fpu->fprs, vcpu->run->s.regs.fprs, sizeof(fpu->fprs)); |
| fpu->fpc = vcpu->run->s.regs.fpc; |
| |
| vcpu_put(vcpu); |
| return 0; |
| } |
| |
| static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) |
| { |
| int rc = 0; |
| |
| if (!is_vcpu_stopped(vcpu)) |
| rc = -EBUSY; |
| else { |
| vcpu->run->psw_mask = psw.mask; |
| vcpu->run->psw_addr = psw.addr; |
| } |
| return rc; |
| } |
| |
| int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
| struct kvm_translation *tr) |
| { |
| return -EINVAL; /* not implemented yet */ |
| } |
| |
| #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
| KVM_GUESTDBG_USE_HW_BP | \ |
| KVM_GUESTDBG_ENABLE) |
| |
| int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
| struct kvm_guest_debug *dbg) |
| { |
| int rc = 0; |
| |
| vcpu_load(vcpu); |
| |
| vcpu->guest_debug = 0; |
| kvm_s390_clear_bp_data(vcpu); |
| |
| if (dbg->control & ~VALID_GUESTDBG_FLAGS) { |
| rc = -EINVAL; |
| goto out; |
| } |
| if (!sclp.has_gpere) { |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| if (dbg->control & KVM_GUESTDBG_ENABLE) { |
| vcpu->guest_debug = dbg->control; |
| /* enforce guest PER */ |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_P); |
| |
| if (dbg->control & KVM_GUESTDBG_USE_HW_BP) |
| rc = kvm_s390_import_bp_data(vcpu, dbg); |
| } else { |
| kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P); |
| vcpu->arch.guestdbg.last_bp = 0; |
| } |
| |
| if (rc) { |
| vcpu->guest_debug = 0; |
| kvm_s390_clear_bp_data(vcpu); |
| kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P); |
| } |
| |
| out: |
| vcpu_put(vcpu); |
| return rc; |
| } |
| |
| int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| struct kvm_mp_state *mp_state) |
| { |
| int ret; |
| |
| vcpu_load(vcpu); |
| |
| /* CHECK_STOP and LOAD are not supported yet */ |
| ret = is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : |
| KVM_MP_STATE_OPERATING; |
| |
| vcpu_put(vcpu); |
| return ret; |
| } |
| |
| int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| struct kvm_mp_state *mp_state) |
| { |
| int rc = 0; |
| |
| vcpu_load(vcpu); |
| |
| /* user space knows about this interface - let it control the state */ |
| vcpu->kvm->arch.user_cpu_state_ctrl = 1; |
| |
| switch (mp_state->mp_state) { |
| case KVM_MP_STATE_STOPPED: |
| rc = kvm_s390_vcpu_stop(vcpu); |
| break; |
| case KVM_MP_STATE_OPERATING: |
| rc = kvm_s390_vcpu_start(vcpu); |
| break; |
| case KVM_MP_STATE_LOAD: |
| if (!kvm_s390_pv_cpu_is_protected(vcpu)) { |
| rc = -ENXIO; |
| break; |
| } |
| rc = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR_LOAD); |
| break; |
| case KVM_MP_STATE_CHECK_STOP: |
| fallthrough; /* CHECK_STOP and LOAD are not supported yet */ |
| default: |
| rc = -ENXIO; |
| } |
| |
| vcpu_put(vcpu); |
| return rc; |
| } |
| |
| static bool ibs_enabled(struct kvm_vcpu *vcpu) |
| { |
| return kvm_s390_test_cpuflags(vcpu, CPUSTAT_IBS); |
| } |
| |
| static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
| { |
| retry: |
| kvm_s390_vcpu_request_handled(vcpu); |
| if (!kvm_request_pending(vcpu)) |
| return 0; |
| /* |
| * We use MMU_RELOAD just to re-arm the ipte notifier for the |
| * guest prefix page. gmap_mprotect_notify will wait on the ptl lock. |
| * This ensures that the ipte instruction for this request has |
| * already finished. We might race against a second unmapper that |
| * wants to set the blocking bit. Lets just retry the request loop. |
| */ |
| if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
| int rc; |
| rc = gmap_mprotect_notify(vcpu->arch.gmap, |
| kvm_s390_get_prefix(vcpu), |
| PAGE_SIZE * 2, PROT_WRITE); |
| if (rc) { |
| kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); |
| return rc; |
| } |
| goto retry; |
| } |
| |
| if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
| vcpu->arch.sie_block->ihcpu = 0xffff; |
| goto retry; |
| } |
| |
| if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
| if (!ibs_enabled(vcpu)) { |
| trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_IBS); |
| } |
| goto retry; |
| } |
| |
| if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { |
| if (ibs_enabled(vcpu)) { |
| trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); |
| kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS); |
| } |
| goto retry; |
| } |
| |
| if (kvm_check_request(KVM_REQ_ICPT_OPEREXC, vcpu)) { |
| vcpu->arch.sie_block->ictl |= ICTL_OPEREXC; |
| goto retry; |
| } |
| |
| if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) { |
| /* |
| * Disable CMM virtualization; we will emulate the ESSA |
| * instruction manually, in order to provide additional |
| * functionalities needed for live migration. |
| */ |
| vcpu->arch.sie_block->ecb2 &= ~ECB2_CMMA; |
| goto retry; |
| } |
| |
| if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) { |
| /* |
| * Re-enable CMM virtualization if CMMA is available and |
| * CMM has been used. |
| */ |
| if ((vcpu->kvm->arch.use_cmma) && |
| (vcpu->kvm->mm->context.uses_cmm)) |
| vcpu->arch.sie_block->ecb2 |= ECB2_CMMA; |
| goto retry; |
| } |
| |
| /* nothing to do, just clear the request */ |
| kvm_clear_request(KVM_REQ_UNHALT, vcpu); |
| /* we left the vsie handler, nothing to do, just clear the request */ |
| kvm_clear_request(KVM_REQ_VSIE_RESTART, vcpu); |
| |
| return 0; |
| } |
| |
| void kvm_s390_set_tod_clock(struct kvm *kvm, |
| const struct kvm_s390_vm_tod_clock *gtod) |
| { |
| struct kvm_vcpu *vcpu; |
| struct kvm_s390_tod_clock_ext htod; |
| int i; |
| |
| mutex_lock(&kvm->lock); |
| preempt_disable(); |
| |
| get_tod_clock_ext((char *)&htod); |
| |
| kvm->arch.epoch = gtod->tod - htod.tod; |
| kvm->arch.epdx = 0; |
| if (test_kvm_facility(kvm, 139)) { |
| kvm->arch.epdx = gtod->epoch_idx - htod.epoch_idx; |
| if (kvm->arch.epoch > gtod->tod) |
| kvm->arch.epdx -= 1; |
| } |
| |
| kvm_s390_vcpu_block_all(kvm); |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| vcpu->arch.sie_block->epoch = kvm->arch.epoch; |
| vcpu->arch.sie_block->epdx = kvm->arch.epdx; |
| } |
| |
| kvm_s390_vcpu_unblock_all(kvm); |
| preempt_enable(); |
| mutex_unlock(&kvm->lock); |
| } |
| |
| /** |
| * kvm_arch_fault_in_page - fault-in guest page if necessary |
| * @vcpu: The corresponding virtual cpu |
| * @gpa: Guest physical address |
| * @writable: Whether the page should be writable or not |
| * |
| * Make sure that a guest page has been faulted-in on the host. |
| * |
| * Return: Zero on success, negative error code otherwise. |
| */ |
| long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) |
| { |
| return gmap_fault(vcpu->arch.gmap, gpa, |
| writable ? FAULT_FLAG_WRITE : 0); |
| } |
| |
| static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
| unsigned long token) |
| { |
| struct kvm_s390_interrupt inti; |
| struct kvm_s390_irq irq; |
| |
| if (start_token) { |
| irq.u.ext.ext_params2 = token; |
| irq.type = KVM_S390_INT_PFAULT_INIT; |
| WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); |
| } else { |
| inti.type = KVM_S390_INT_PFAULT_DONE; |
| inti.parm64 = token; |
| WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
| } |
| } |
| |
| bool kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, |
| struct kvm_async_pf *work) |
| { |
| trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); |
| __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); |
| |
| return true; |
| } |
| |
| void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, |
| struct kvm_async_pf *work) |
| { |
| trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); |
| __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); |
| } |
| |
| void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, |
| struct kvm_async_pf *work) |
| { |
| /* s390 will always inject the page directly */ |
| } |
| |
| bool kvm_arch_can_dequeue_async_page_present(struct kvm_vcpu *vcpu) |
| { |
| /* |
| * s390 will always inject the page directly, |
| * but we still want check_async_completion to cleanup |
| */ |
| return true; |
| } |
| |
| static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) |
| { |
| hva_t hva; |
| struct kvm_arch_async_pf arch; |
| int rc; |
| |
| if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
| return 0; |
| if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != |
| vcpu->arch.pfault_compare) |
| return 0; |
| if (psw_extint_disabled(vcpu)) |
| return 0; |
| if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
| return 0; |
| if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK)) |
| return 0; |
| if (!vcpu->arch.gmap->pfault_enabled) |
| return 0; |
| |
| hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
| hva += current->thread.gmap_addr & ~PAGE_MASK; |
| if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) |
| return 0; |
| |
| rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); |
| return rc; |
| } |
| |
| static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
| { |
| int rc, cpuflags; |
| |
| /* |
| * On s390 notifications for arriving pages will be delivered directly |
| * to the guest but the house keeping for completed pfaults is |
| * handled outside the worker. |
| */ |
| kvm_check_async_pf_completion(vcpu); |
| |
| vcpu->arch.sie_block->gg14 = vcpu->run->s.regs.gprs[14]; |
| vcpu->arch.sie_block->gg15 = vcpu->run->s.regs.gprs[15]; |
| |
| if (need_resched()) |
| schedule(); |
| |
| if (!kvm_is_ucontrol(vcpu->kvm)) { |
| rc = kvm_s390_deliver_pending_interrupts(vcpu); |
| if (rc) |
| return rc; |
| } |
| |
| rc = kvm_s390_handle_requests(vcpu); |
| if (rc) |
| return rc; |
| |
| if (guestdbg_enabled(vcpu)) { |
| kvm_s390_backup_guest_per_regs(vcpu); |
| kvm_s390_patch_guest_per_regs(vcpu); |
| } |
| |
| clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask); |
| |
| vcpu->arch.sie_block->icptcode = 0; |
| cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
| VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); |
| trace_kvm_s390_sie_enter(vcpu, cpuflags); |
| |
| return 0; |
| } |
| |
| static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_s390_pgm_info pgm_info = { |
| .code = PGM_ADDRESSING, |
| }; |
| u8 opcode, ilen; |
| int rc; |
| |
| VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
| trace_kvm_s390_sie_fault(vcpu); |
| |
| /* |
| * We want to inject an addressing exception, which is defined as a |
| * suppressing or terminating exception. However, since we came here |
| * by a DAT access exception, the PSW still points to the faulting |
| * instruction since DAT exceptions are nullifying. So we've got |
| * to look up the current opcode to get the length of the instruction |
| * to be able to forward the PSW. |
| */ |
| rc = read_guest_instr(vcpu, vcpu->arch.sie_block->gpsw.addr, &opcode, 1); |
| ilen = insn_length(opcode); |
| if (rc < 0) { |
| return rc; |
| } else if (rc) { |
| /* Instruction-Fetching Exceptions - we can't detect the ilen. |
| * Forward by arbitrary ilc, injection will take care of |
| * nullification if necessary. |
| */ |
| pgm_info = vcpu->arch.pgm; |
| ilen = 4; |
| } |
| pgm_info.flags = ilen | KVM_S390_PGM_FLAGS_ILC_VALID; |
| kvm_s390_forward_psw(vcpu, ilen); |
| return kvm_s390_inject_prog_irq(vcpu, &pgm_info); |
| } |
| |
| static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
| { |
| struct mcck_volatile_info *mcck_info; |
| struct sie_page *sie_page; |
| |
| VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
| vcpu->arch.sie_block->icptcode); |
| trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
| |
| if (guestdbg_enabled(vcpu)) |
| kvm_s390_restore_guest_per_regs(vcpu); |
| |
| vcpu->run->s.regs.gprs[14] = vcpu->arch.sie_block->gg14; |
| vcpu->run->s.regs.gprs[15] = vcpu->arch.sie_block->gg15; |
| |
| if (exit_reason == -EINTR) { |
| VCPU_EVENT(vcpu, 3, "%s", "machine check"); |
| sie_page = container_of(vcpu->arch.sie_block, |
| struct sie_page, sie_block); |
| mcck_info = &sie_page->mcck_info; |
| kvm_s390_reinject_machine_check(vcpu, mcck_info); |
| return 0; |
| } |
| |
| if (vcpu->arch.sie_block->icptcode > 0) { |
| int rc = kvm_handle_sie_intercept(vcpu); |
| |
| if (rc != -EOPNOTSUPP) |
| return rc; |
| vcpu->run->exit_reason = KVM_EXIT_S390_SIEIC; |
| vcpu->run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; |
| vcpu->run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
| vcpu->run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; |
| return -EREMOTE; |
| } else if (exit_reason != -EFAULT) { |
| vcpu->stat.exit_null++; |
| return 0; |
| } else if (kvm_is_ucontrol(vcpu->kvm)) { |
| vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; |
| vcpu->run->s390_ucontrol.trans_exc_code = |
| current->thread.gmap_addr; |
| vcpu->run->s390_ucontrol.pgm_code = 0x10; |
| return -EREMOTE; |
| } else if (current->thread.gmap_pfault) { |
| trace_kvm_s390_major_guest_pfault(vcpu); |
| current->thread.gmap_pfault = 0; |
| if (kvm_arch_setup_async_pf(vcpu)) |
| return 0; |
| return kvm_arch_fault_in_page(vcpu, current->thread.gmap_addr, 1); |
| } |
| return vcpu_post_run_fault_in_sie(vcpu); |
| } |
| |
| #define PSW_INT_MASK (PSW_MASK_EXT | PSW_MASK_IO | PSW_MASK_MCHECK) |
| static int __vcpu_run(struct kvm_vcpu *vcpu) |
| { |
| int rc, exit_reason; |
| struct sie_page *sie_page = (struct sie_page *)vcpu->arch.sie_block; |
| |
| /* |
| * We try to hold kvm->srcu during most of vcpu_run (except when run- |
| * ning the guest), so that memslots (and other stuff) are protected |
| */ |
| vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| |
| do { |
| rc = vcpu_pre_run(vcpu); |
| if (rc) |
| break; |
| |
| srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
| /* |
| * As PF_VCPU will be used in fault handler, between |
| * guest_enter and guest_exit should be no uaccess. |
| */ |
| local_irq_disable(); |
| guest_enter_irqoff(); |
| __disable_cpu_timer_accounting(vcpu); |
| local_irq_enable(); |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| memcpy(sie_page->pv_grregs, |
| vcpu->run->s.regs.gprs, |
| sizeof(sie_page->pv_grregs)); |
| } |
| exit_reason = sie64a(vcpu->arch.sie_block, |
| vcpu->run->s.regs.gprs); |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| memcpy(vcpu->run->s.regs.gprs, |
| sie_page->pv_grregs, |
| sizeof(sie_page->pv_grregs)); |
| /* |
| * We're not allowed to inject interrupts on intercepts |
| * that leave the guest state in an "in-between" state |
| * where the next SIE entry will do a continuation. |
| * Fence interrupts in our "internal" PSW. |
| */ |
| if (vcpu->arch.sie_block->icptcode == ICPT_PV_INSTR || |
| vcpu->arch.sie_block->icptcode == ICPT_PV_PREF) { |
| vcpu->arch.sie_block->gpsw.mask &= ~PSW_INT_MASK; |
| } |
| } |
| local_irq_disable(); |
| __enable_cpu_timer_accounting(vcpu); |
| guest_exit_irqoff(); |
| local_irq_enable(); |
| vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| |
| rc = vcpu_post_run(vcpu, exit_reason); |
| } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
| |
| srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
| return rc; |
| } |
| |
| static void sync_regs_fmt2(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| { |
| struct runtime_instr_cb *riccb; |
| struct gs_cb *gscb; |
| |
| riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb; |
| gscb = (struct gs_cb *) &kvm_run->s.regs.gscb; |
| vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
| vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; |
| if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { |
| vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; |
| vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; |
| vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; |
| } |
| if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { |
| vcpu->arch.pfault_token = kvm_run->s.regs.pft; |
| vcpu->arch.pfault_select = kvm_run->s.regs.pfs; |
| vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; |
| if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
| kvm_clear_async_pf_completion_queue(vcpu); |
| } |
| /* |
| * If userspace sets the riccb (e.g. after migration) to a valid state, |
| * we should enable RI here instead of doing the lazy enablement. |
| */ |
| if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) && |
| test_kvm_facility(vcpu->kvm, 64) && |
| riccb->v && |
| !(vcpu->arch.sie_block->ecb3 & ECB3_RI)) { |
| VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)"); |
| vcpu->arch.sie_block->ecb3 |= ECB3_RI; |
| } |
| /* |
| * If userspace sets the gscb (e.g. after migration) to non-zero, |
| * we should enable GS here instead of doing the lazy enablement. |
| */ |
| if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) && |
| test_kvm_facility(vcpu->kvm, 133) && |
| gscb->gssm && |
| !vcpu->arch.gs_enabled) { |
| VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)"); |
| vcpu->arch.sie_block->ecb |= ECB_GS; |
| vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT; |
| vcpu->arch.gs_enabled = 1; |
| } |
| if ((kvm_run->kvm_dirty_regs & KVM_SYNC_BPBC) && |
| test_kvm_facility(vcpu->kvm, 82)) { |
| vcpu->arch.sie_block->fpf &= ~FPF_BPBC; |
| vcpu->arch.sie_block->fpf |= kvm_run->s.regs.bpbc ? FPF_BPBC : 0; |
| } |
| if (MACHINE_HAS_GS) { |
| preempt_disable(); |
| __ctl_set_bit(2, 4); |
| if (current->thread.gs_cb) { |
| vcpu->arch.host_gscb = current->thread.gs_cb; |
| save_gs_cb(vcpu->arch.host_gscb); |
| } |
| if (vcpu->arch.gs_enabled) { |
| current->thread.gs_cb = (struct gs_cb *) |
| &vcpu->run->s.regs.gscb; |
| restore_gs_cb(current->thread.gs_cb); |
| } |
| preempt_enable(); |
| } |
| /* SIE will load etoken directly from SDNX and therefore kvm_run */ |
| } |
| |
| static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| { |
| if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) |
| kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); |
| if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
| memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); |
| /* some control register changes require a tlb flush */ |
| kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
| } |
| if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { |
| kvm_s390_set_cpu_timer(vcpu, kvm_run->s.regs.cputm); |
| vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; |
| } |
| save_access_regs(vcpu->arch.host_acrs); |
| restore_access_regs(vcpu->run->s.regs.acrs); |
| /* save host (userspace) fprs/vrs */ |
| save_fpu_regs(); |
| vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc; |
| vcpu->arch.host_fpregs.regs = current->thread.fpu.regs; |
| if (MACHINE_HAS_VX) |
| current->thread.fpu.regs = vcpu->run->s.regs.vrs; |
| else |
| current->thread.fpu.regs = vcpu->run->s.regs.fprs; |
| current->thread.fpu.fpc = vcpu->run->s.regs.fpc; |
| if (test_fp_ctl(current->thread.fpu.fpc)) |
| /* User space provided an invalid FPC, let's clear it */ |
| current->thread.fpu.fpc = 0; |
| |
| /* Sync fmt2 only data */ |
| if (likely(!kvm_s390_pv_cpu_is_protected(vcpu))) { |
| sync_regs_fmt2(vcpu, kvm_run); |
| } else { |
| /* |
| * In several places we have to modify our internal view to |
| * not do things that are disallowed by the ultravisor. For |
| * example we must not inject interrupts after specific exits |
| * (e.g. 112 prefix page not secure). We do this by turning |
| * off the machine check, external and I/O interrupt bits |
| * of our PSW copy. To avoid getting validity intercepts, we |
| * do only accept the condition code from userspace. |
| */ |
| vcpu->arch.sie_block->gpsw.mask &= ~PSW_MASK_CC; |
| vcpu->arch.sie_block->gpsw.mask |= kvm_run->psw_mask & |
| PSW_MASK_CC; |
| } |
| |
| kvm_run->kvm_dirty_regs = 0; |
| } |
| |
| static void store_regs_fmt2(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| { |
| kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; |
| kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; |
| kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; |
| kvm_run->s.regs.bpbc = (vcpu->arch.sie_block->fpf & FPF_BPBC) == FPF_BPBC; |
| if (MACHINE_HAS_GS) { |
| __ctl_set_bit(2, 4); |
| if (vcpu->arch.gs_enabled) |
| save_gs_cb(current->thread.gs_cb); |
| preempt_disable(); |
| current->thread.gs_cb = vcpu->arch.host_gscb; |
| restore_gs_cb(vcpu->arch.host_gscb); |
| preempt_enable(); |
| if (!vcpu->arch.host_gscb) |
| __ctl_clear_bit(2, 4); |
| vcpu->arch.host_gscb = NULL; |
| } |
| /* SIE will save etoken directly into SDNX and therefore kvm_run */ |
| } |
| |
| static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
| { |
| kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
| kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; |
| kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); |
| memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
| kvm_run->s.regs.cputm = kvm_s390_get_cpu_timer(vcpu); |
| kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; |
| kvm_run->s.regs.pft = vcpu->arch.pfault_token; |
| kvm_run->s.regs.pfs = vcpu->arch.pfault_select; |
| kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; |
| save_access_regs(vcpu->run->s.regs.acrs); |
| restore_access_regs(vcpu->arch.host_acrs); |
| /* Save guest register state */ |
| save_fpu_regs(); |
| vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
| /* Restore will be done lazily at return */ |
| current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc; |
| current->thread.fpu.regs = vcpu->arch.host_fpregs.regs; |
| if (likely(!kvm_s390_pv_cpu_is_protected(vcpu))) |
| store_regs_fmt2(vcpu, kvm_run); |
| } |
| |
| int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) |
| { |
| struct kvm_run *kvm_run = vcpu->run; |
| int rc; |
| |
| if (kvm_run->immediate_exit) |
| return -EINTR; |
| |
| if (kvm_run->kvm_valid_regs & ~KVM_SYNC_S390_VALID_FIELDS || |
| kvm_run->kvm_dirty_regs & ~KVM_SYNC_S390_VALID_FIELDS) |
| return -EINVAL; |
| |
| vcpu_load(vcpu); |
| |
| if (guestdbg_exit_pending(vcpu)) { |
| kvm_s390_prepare_debug_exit(vcpu); |
| rc = 0; |
| goto out; |
| } |
| |
| kvm_sigset_activate(vcpu); |
| |
| /* |
| * no need to check the return value of vcpu_start as it can only have |
| * an error for protvirt, but protvirt means user cpu state |
| */ |
| if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
| kvm_s390_vcpu_start(vcpu); |
| } else if (is_vcpu_stopped(vcpu)) { |
| pr_err_ratelimited("can't run stopped vcpu %d\n", |
| vcpu->vcpu_id); |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| sync_regs(vcpu, kvm_run); |
| enable_cpu_timer_accounting(vcpu); |
| |
| might_fault(); |
| rc = __vcpu_run(vcpu); |
| |
| if (signal_pending(current) && !rc) { |
| kvm_run->exit_reason = KVM_EXIT_INTR; |
| rc = -EINTR; |
| } |
| |
| if (guestdbg_exit_pending(vcpu) && !rc) { |
| kvm_s390_prepare_debug_exit(vcpu); |
| rc = 0; |
| } |
| |
| if (rc == -EREMOTE) { |
| /* userspace support is needed, kvm_run has been prepared */ |
| rc = 0; |
| } |
| |
| disable_cpu_timer_accounting(vcpu); |
| store_regs(vcpu, kvm_run); |
| |
| kvm_sigset_deactivate(vcpu); |
| |
| vcpu->stat.exit_userspace++; |
| out: |
| vcpu_put(vcpu); |
| return rc; |
| } |
| |
| /* |
| * store status at address |
| * we use have two special cases: |
| * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit |
| * KVM_S390_STORE_STATUS_PREFIXED: -> prefix |
| */ |
| int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
| { |
| unsigned char archmode = 1; |
| freg_t fprs[NUM_FPRS]; |
| unsigned int px; |
| u64 clkcomp, cputm; |
| int rc; |
| |
| px = kvm_s390_get_prefix(vcpu); |
| if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
| if (write_guest_abs(vcpu, 163, &archmode, 1)) |
| return -EFAULT; |
| gpa = 0; |
| } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { |
| if (write_guest_real(vcpu, 163, &archmode, 1)) |
| return -EFAULT; |
| gpa = px; |
| } else |
| gpa -= __LC_FPREGS_SAVE_AREA; |
| |
| /* manually convert vector registers if necessary */ |
| if (MACHINE_HAS_VX) { |
| convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
| rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
| fprs, 128); |
| } else { |
| rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA, |
| vcpu->run->s.regs.fprs, 128); |
| } |
| rc |= write_guest_abs(vcpu, gpa + __LC_GPREGS_SAVE_AREA, |
| vcpu->run->s.regs.gprs, 128); |
| rc |= write_guest_abs(vcpu, gpa + __LC_PSW_SAVE_AREA, |
| &vcpu->arch.sie_block->gpsw, 16); |
| rc |= write_guest_abs(vcpu, gpa + __LC_PREFIX_SAVE_AREA, |
| &px, 4); |
| rc |= write_guest_abs(vcpu, gpa + __LC_FP_CREG_SAVE_AREA, |
| &vcpu->run->s.regs.fpc, 4); |
| rc |= write_guest_abs(vcpu, gpa + __LC_TOD_PROGREG_SAVE_AREA, |
| &vcpu->arch.sie_block->todpr, 4); |
| cputm = kvm_s390_get_cpu_timer(vcpu); |
| rc |= write_guest_abs(vcpu, gpa + __LC_CPU_TIMER_SAVE_AREA, |
| &cputm, 8); |
| clkcomp = vcpu->arch.sie_block->ckc >> 8; |
| rc |= write_guest_abs(vcpu, gpa + __LC_CLOCK_COMP_SAVE_AREA, |
| &clkcomp, 8); |
| rc |= write_guest_abs(vcpu, gpa + __LC_AREGS_SAVE_AREA, |
| &vcpu->run->s.regs.acrs, 64); |
| rc |= write_guest_abs(vcpu, gpa + __LC_CREGS_SAVE_AREA, |
| &vcpu->arch.sie_block->gcr, 128); |
| return rc ? -EFAULT : 0; |
| } |
| |
| int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
| { |
| /* |
| * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy |
| * switch in the run ioctl. Let's update our copies before we save |
| * it into the save area |
| */ |
| save_fpu_regs(); |
| vcpu->run->s.regs.fpc = current->thread.fpu.fpc; |
| save_access_regs(vcpu->run->s.regs.acrs); |
| |
| return kvm_s390_store_status_unloaded(vcpu, addr); |
| } |
| |
| static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
| { |
| kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); |
| kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
| } |
| |
| static void __disable_ibs_on_all_vcpus(struct kvm *kvm) |
| { |
| unsigned int i; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) { |
| __disable_ibs_on_vcpu(vcpu); |
| } |
| } |
| |
| static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
| { |
| if (!sclp.has_ibs) |
| return; |
| kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); |
| kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
| } |
| |
| int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
| { |
| int i, online_vcpus, r = 0, started_vcpus = 0; |
| |
| if (!is_vcpu_stopped(vcpu)) |
| return 0; |
| |
| trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
| /* Only one cpu at a time may enter/leave the STOPPED state. */ |
| spin_lock(&vcpu->kvm->arch.start_stop_lock); |
| online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
| |
| /* Let's tell the UV that we want to change into the operating state */ |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| r = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_OPR); |
| if (r) { |
| spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
| return r; |
| } |
| } |
| |
| for (i = 0; i < online_vcpus; i++) { |
| if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) |
| started_vcpus++; |
| } |
| |
| if (started_vcpus == 0) { |
| /* we're the only active VCPU -> speed it up */ |
| __enable_ibs_on_vcpu(vcpu); |
| } else if (started_vcpus == 1) { |
| /* |
| * As we are starting a second VCPU, we have to disable |
| * the IBS facility on all VCPUs to remove potentially |
| * oustanding ENABLE requests. |
| */ |
| __disable_ibs_on_all_vcpus(vcpu->kvm); |
| } |
| |
| kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED); |
| /* |
| * The real PSW might have changed due to a RESTART interpreted by the |
| * ultravisor. We block all interrupts and let the next sie exit |
| * refresh our view. |
| */ |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) |
| vcpu->arch.sie_block->gpsw.mask &= ~PSW_INT_MASK; |
| /* |
| * Another VCPU might have used IBS while we were offline. |
| * Let's play safe and flush the VCPU at startup. |
| */ |
| kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
| spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
| return 0; |
| } |
| |
| int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) |
| { |
| int i, online_vcpus, r = 0, started_vcpus = 0; |
| struct kvm_vcpu *started_vcpu = NULL; |
| |
| if (is_vcpu_stopped(vcpu)) |
| return 0; |
| |
| trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
| /* Only one cpu at a time may enter/leave the STOPPED state. */ |
| spin_lock(&vcpu->kvm->arch.start_stop_lock); |
| online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
| |
| /* Let's tell the UV that we want to change into the stopped state */ |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| r = kvm_s390_pv_set_cpu_state(vcpu, PV_CPU_STATE_STP); |
| if (r) { |
| spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
| return r; |
| } |
| } |
| |
| /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
| kvm_s390_clear_stop_irq(vcpu); |
| |
| kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOPPED); |
| __disable_ibs_on_vcpu(vcpu); |
| |
| for (i = 0; i < online_vcpus; i++) { |
| if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { |
| started_vcpus++; |
| started_vcpu = vcpu->kvm->vcpus[i]; |
| } |
| } |
| |
| if (started_vcpus == 1) { |
| /* |
| * As we only have one VCPU left, we want to enable the |
| * IBS facility for that VCPU to speed it up. |
| */ |
| __enable_ibs_on_vcpu(started_vcpu); |
| } |
| |
| spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
| return 0; |
| } |
| |
| static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
| struct kvm_enable_cap *cap) |
| { |
| int r; |
| |
| if (cap->flags) |
| return -EINVAL; |
| |
| switch (cap->cap) { |
| case KVM_CAP_S390_CSS_SUPPORT: |
| if (!vcpu->kvm->arch.css_support) { |
| vcpu->kvm->arch.css_support = 1; |
| VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
| trace_kvm_s390_enable_css(vcpu->kvm); |
| } |
| r = 0; |
| break; |
| default: |
| r = -EINVAL; |
| break; |
| } |
| return r; |
| } |
| |
| static long kvm_s390_guest_sida_op(struct kvm_vcpu *vcpu, |
| struct kvm_s390_mem_op *mop) |
| { |
| void __user *uaddr = (void __user *)mop->buf; |
| int r = 0; |
| |
| if (mop->flags || !mop->size) |
| return -EINVAL; |
| if (mop->size + mop->sida_offset < mop->size) |
| return -EINVAL; |
| if (mop->size + mop->sida_offset > sida_size(vcpu->arch.sie_block)) |
| return -E2BIG; |
| |
| switch (mop->op) { |
| case KVM_S390_MEMOP_SIDA_READ: |
| if (copy_to_user(uaddr, (void *)(sida_origin(vcpu->arch.sie_block) + |
| mop->sida_offset), mop->size)) |
| r = -EFAULT; |
| |
| break; |
| case KVM_S390_MEMOP_SIDA_WRITE: |
| if (copy_from_user((void *)(sida_origin(vcpu->arch.sie_block) + |
| mop->sida_offset), uaddr, mop->size)) |
| r = -EFAULT; |
| break; |
| } |
| return r; |
| } |
| static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
| struct kvm_s390_mem_op *mop) |
| { |
| void __user *uaddr = (void __user *)mop->buf; |
| void *tmpbuf = NULL; |
| int r = 0; |
| const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION |
| | KVM_S390_MEMOP_F_CHECK_ONLY; |
| |
| if (mop->flags & ~supported_flags || mop->ar >= NUM_ACRS || !mop->size) |
| return -EINVAL; |
| |
| if (mop->size > MEM_OP_MAX_SIZE) |
| return -E2BIG; |
| |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) |
| return -EINVAL; |
| |
| if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { |
| tmpbuf = vmalloc(mop->size); |
| if (!tmpbuf) |
| return -ENOMEM; |
| } |
| |
| switch (mop->op) { |
| case KVM_S390_MEMOP_LOGICAL_READ: |
| if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { |
| r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
| mop->size, GACC_FETCH); |
| break; |
| } |
| r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); |
| if (r == 0) { |
| if (copy_to_user(uaddr, tmpbuf, mop->size)) |
| r = -EFAULT; |
| } |
| break; |
| case KVM_S390_MEMOP_LOGICAL_WRITE: |
| if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { |
| r = check_gva_range(vcpu, mop->gaddr, mop->ar, |
| mop->size, GACC_STORE); |
| break; |
| } |
| if (copy_from_user(tmpbuf, uaddr, mop->size)) { |
| r = -EFAULT; |
| break; |
| } |
| r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); |
| break; |
| } |
| |
| if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) |
| kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); |
| |
| vfree(tmpbuf); |
| return r; |
| } |
| |
| static long kvm_s390_guest_memsida_op(struct kvm_vcpu *vcpu, |
| struct kvm_s390_mem_op *mop) |
| { |
| int r, srcu_idx; |
| |
| srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
| |
| switch (mop->op) { |
| case KVM_S390_MEMOP_LOGICAL_READ: |
| case KVM_S390_MEMOP_LOGICAL_WRITE: |
| r = kvm_s390_guest_mem_op(vcpu, mop); |
| break; |
| case KVM_S390_MEMOP_SIDA_READ: |
| case KVM_S390_MEMOP_SIDA_WRITE: |
| /* we are locked against sida going away by the vcpu->mutex */ |
| r = kvm_s390_guest_sida_op(vcpu, mop); |
| break; |
| default: |
| r = -EINVAL; |
| } |
| |
| srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); |
| return r; |
| } |
| |
| long kvm_arch_vcpu_async_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| struct kvm_vcpu *vcpu = filp->private_data; |
| void __user *argp = (void __user *)arg; |
| |
| switch (ioctl) { |
| case KVM_S390_IRQ: { |
| struct kvm_s390_irq s390irq; |
| |
| if (copy_from_user(&s390irq, argp, sizeof(s390irq))) |
| return -EFAULT; |
| return kvm_s390_inject_vcpu(vcpu, &s390irq); |
| } |
| case KVM_S390_INTERRUPT: { |
| struct kvm_s390_interrupt s390int; |
| struct kvm_s390_irq s390irq = {}; |
| |
| if (copy_from_user(&s390int, argp, sizeof(s390int))) |
| return -EFAULT; |
| if (s390int_to_s390irq(&s390int, &s390irq)) |
| return -EINVAL; |
| return kvm_s390_inject_vcpu(vcpu, &s390irq); |
| } |
| } |
| return -ENOIOCTLCMD; |
| } |
| |
| long kvm_arch_vcpu_ioctl(struct file *filp, |
| unsigned int ioctl, unsigned long arg) |
| { |
| struct kvm_vcpu *vcpu = filp->private_data; |
| void __user *argp = (void __user *)arg; |
| int idx; |
| long r; |
| u16 rc, rrc; |
| |
| vcpu_load(vcpu); |
| |
| switch (ioctl) { |
| case KVM_S390_STORE_STATUS: |
| idx = srcu_read_lock(&vcpu->kvm->srcu); |
| r = kvm_s390_store_status_unloaded(vcpu, arg); |
| srcu_read_unlock(&vcpu->kvm->srcu, idx); |
| break; |
| case KVM_S390_SET_INITIAL_PSW: { |
| psw_t psw; |
| |
| r = -EFAULT; |
| if (copy_from_user(&psw, argp, sizeof(psw))) |
| break; |
| r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); |
| break; |
| } |
| case KVM_S390_CLEAR_RESET: |
| r = 0; |
| kvm_arch_vcpu_ioctl_clear_reset(vcpu); |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| r = uv_cmd_nodata(kvm_s390_pv_cpu_get_handle(vcpu), |
| UVC_CMD_CPU_RESET_CLEAR, &rc, &rrc); |
| VCPU_EVENT(vcpu, 3, "PROTVIRT RESET CLEAR VCPU: rc %x rrc %x", |
| rc, rrc); |
| } |
| break; |
| case KVM_S390_INITIAL_RESET: |
| r = 0; |
| kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| r = uv_cmd_nodata(kvm_s390_pv_cpu_get_handle(vcpu), |
| UVC_CMD_CPU_RESET_INITIAL, |
| &rc, &rrc); |
| VCPU_EVENT(vcpu, 3, "PROTVIRT RESET INITIAL VCPU: rc %x rrc %x", |
| rc, rrc); |
| } |
| break; |
| case KVM_S390_NORMAL_RESET: |
| r = 0; |
| kvm_arch_vcpu_ioctl_normal_reset(vcpu); |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
| r = uv_cmd_nodata(kvm_s390_pv_cpu_get_handle(vcpu), |
| UVC_CMD_CPU_RESET, &rc, &rrc); |
| VCPU_EVENT(vcpu, 3, "PROTVIRT RESET NORMAL VCPU: rc %x rrc %x", |
| rc, rrc); |
| } |
| break; |
| case KVM_SET_ONE_REG: |
| case KVM_GET_ONE_REG: { |
| struct kvm_one_reg reg; |
| r = -EINVAL; |
| if (kvm_s390_pv_cpu_is_protected(vcpu)) |
| break; |
| r = -EFAULT; |
| if (copy_from_user(®, argp, sizeof(reg))) |
| break; |
| if (ioctl == KVM_SET_ONE_REG) |
| r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); |
| else |
| r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); |
| break; |
| } |
| #ifdef CONFIG_KVM_S390_UCONTROL |
| case KVM_S390_UCAS_MAP: { |
| struct kvm_s390_ucas_mapping ucasmap; |
| |
| if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| r = -EFAULT; |
| break; |
| } |
| |
| if (!kvm_is_ucontrol(vcpu->kvm)) { |
| r = -EINVAL; |
| break; |
| } |
| |
| r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, |
| ucasmap.vcpu_addr, ucasmap.length); |
| break; |
| } |
| case KVM_S390_UCAS_UNMAP: { |
| struct kvm_s390_ucas_mapping ucasmap; |
| |
| if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { |
| r = -EFAULT; |
| break; |
| } |
| |
| if (!kvm_is_ucontrol(vcpu->kvm)) { |
| r = -EINVAL; |
| break; |
| } |
| |
| r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, |
| ucasmap.length); |
| break; |
| } |
| #endif |
| case KVM_S390_VCPU_FAULT: { |
| r = gmap_fault(vcpu->arch.gmap, arg, 0); |
| break; |
| } |
| case KVM_ENABLE_CAP: |
| { |
| struct kvm_enable_cap cap; |
| r = -EFAULT; |
| if (copy_from_user(&cap, argp, sizeof(cap))) |
| break; |
| r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); |
| break; |
| } |
| case KVM_S390_MEM_OP: { |
| struct kvm_s390_mem_op mem_op; |
| |
| if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) |
| r = kvm_s390_guest_memsida_op(vcpu, &mem_op); |
| else |
| r = -EFAULT; |
| break; |
| } |
| case KVM_S390_SET_IRQ_STATE: { |
| struct kvm_s390_irq_state irq_state; |
| |
| r = -EFAULT; |
| if (copy_from_user(&irq_state, argp, sizeof(irq_state))) |
| break; |
| if (irq_state.len > VCPU_IRQS_MAX_BUF || |
| irq_state.len == 0 || |
| irq_state.len % sizeof(struct kvm_s390_irq) > 0) { |
| r = -EINVAL; |
| break; |
| } |
| /* do not use irq_state.flags, it will break old QEMUs */ |
| r = kvm_s390_set_irq_state(vcpu, |
| (void __user *) irq_state.buf, |
| irq_state.len); |
| break; |
| } |
| case KVM_S390_GET_IRQ_STATE: { |
| struct kvm_s390_irq_state irq_state; |
| |
| r = -EFAULT; |
| if (copy_from_user(&irq_state, argp, sizeof(irq_state))) |
| break; |
| if (irq_state.len == 0) { |
| r = -EINVAL; |
| break; |
| } |
| /* do not use irq_state.flags, it will break old QEMUs */ |
| r = kvm_s390_get_irq_state(vcpu, |
| (__u8 __user *) irq_state.buf, |
| irq_state.len); |
| break; |
| } |
| default: |
| r = -ENOTTY; |
| } |
| |
| vcpu_put(vcpu); |
| return r; |
| } |
| |
| vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
| { |
| #ifdef CONFIG_KVM_S390_UCONTROL |
| if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) |
| && (kvm_is_ucontrol(vcpu->kvm))) { |
| vmf->page = virt_to_page(vcpu->arch.sie_block); |
| get_page(vmf->page); |
| return 0; |
| } |
| #endif |
| return VM_FAULT_SIGBUS; |
| } |
| |
| /* Section: memory related */ |
| int kvm_arch_prepare_memory_region(struct kvm *kvm, |
| struct kvm_memory_slot *memslot, |
| const struct kvm_userspace_memory_region *mem, |
| enum kvm_mr_change change) |
| { |
| /* A few sanity checks. We can have memory slots which have to be |
| located/ended at a segment boundary (1MB). The memory in userland is |
| ok to be fragmented into various different vmas. It is okay to mmap() |
| and munmap() stuff in this slot after doing this call at any time */ |
| |
| if (mem->userspace_addr & 0xffffful) |
| return -EINVAL; |
| |
| if (mem->memory_size & 0xffffful) |
| return -EINVAL; |
| |
| if (mem->guest_phys_addr + mem->memory_size > kvm->arch.mem_limit) |
| return -EINVAL; |
| |
| /* When we are protected, we should not change the memory slots */ |
| if (kvm_s390_pv_get_handle(kvm)) |
| return -EINVAL; |
| return 0; |
| } |
| |
| void kvm_arch_commit_memory_region(struct kvm *kvm, |
| const struct kvm_userspace_memory_region *mem, |
| struct kvm_memory_slot *old, |
| const struct kvm_memory_slot *new, |
| enum kvm_mr_change change) |
| { |
| int rc = 0; |
| |
| switch (change) { |
| case KVM_MR_DELETE: |
| rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE, |
| old->npages * PAGE_SIZE); |
| break; |
| case KVM_MR_MOVE: |
| rc = gmap_unmap_segment(kvm->arch.gmap, old->base_gfn * PAGE_SIZE, |
| old->npages * PAGE_SIZE); |
| if (rc) |
| break; |
| fallthrough; |
| case KVM_MR_CREATE: |
| rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, |
| mem->guest_phys_addr, mem->memory_size); |
| break; |
| case KVM_MR_FLAGS_ONLY: |
| break; |
| default: |
| WARN(1, "Unknown KVM MR CHANGE: %d\n", change); |
| } |
| if (rc) |
| pr_warn("failed to commit memory region\n"); |
| return; |
| } |
| |
| static inline unsigned long nonhyp_mask(int i) |
| { |
| unsigned int nonhyp_fai = (sclp.hmfai << i * 2) >> 30; |
| |
| return 0x0000ffffffffffffUL >> (nonhyp_fai << 4); |
| } |
| |
| void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) |
| { |
| vcpu->valid_wakeup = false; |
| } |
| |
| static int __init kvm_s390_init(void) |
| { |
| int i; |
| |
| if (!sclp.has_sief2) { |
| pr_info("SIE is not available\n"); |
| return -ENODEV; |
| } |
| |
| if (nested && hpage) { |
| pr_info("A KVM host that supports nesting cannot back its KVM guests with huge pages\n"); |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < 16; i++) |
| kvm_s390_fac_base[i] |= |
| S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i); |
| |
| return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
| } |
| |
| static void __exit kvm_s390_exit(void) |
| { |
| kvm_exit(); |
| } |
| |
| module_init(kvm_s390_init); |
| module_exit(kvm_s390_exit); |
| |
| /* |
| * Enable autoloading of the kvm module. |
| * Note that we add the module alias here instead of virt/kvm/kvm_main.c |
| * since x86 takes a different approach. |
| */ |
| #include <linux/miscdevice.h> |
| MODULE_ALIAS_MISCDEV(KVM_MINOR); |
| MODULE_ALIAS("devname:kvm"); |