| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * definition for kvm on s390 |
| * |
| * Copyright IBM Corp. 2008, 2020 |
| * |
| * Author(s): Carsten Otte <cotte@de.ibm.com> |
| * Christian Borntraeger <borntraeger@de.ibm.com> |
| * Christian Ehrhardt <ehrhardt@de.ibm.com> |
| */ |
| |
| #ifndef ARCH_S390_KVM_S390_H |
| #define ARCH_S390_KVM_S390_H |
| |
| #include <linux/hrtimer.h> |
| #include <linux/kvm.h> |
| #include <linux/kvm_host.h> |
| #include <linux/lockdep.h> |
| #include <asm/facility.h> |
| #include <asm/processor.h> |
| #include <asm/sclp.h> |
| |
| /* Transactional Memory Execution related macros */ |
| #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE)) |
| #define TDB_FORMAT1 1 |
| #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1)) |
| |
| extern debug_info_t *kvm_s390_dbf; |
| extern debug_info_t *kvm_s390_dbf_uv; |
| |
| #define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ |
| do { \ |
| debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \ |
| d_args); \ |
| debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \ |
| "%d: " d_string "\n", (d_kvm)->userspace_pid, \ |
| d_args); \ |
| } while (0) |
| |
| #define KVM_EVENT(d_loglevel, d_string, d_args...)\ |
| do { \ |
| debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \ |
| d_args); \ |
| } while (0) |
| |
| #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ |
| do { \ |
| debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ |
| d_args); \ |
| } while (0) |
| |
| #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ |
| do { \ |
| debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ |
| "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ |
| d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ |
| d_args); \ |
| } while (0) |
| |
| static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags) |
| { |
| atomic_or(flags, &vcpu->arch.sie_block->cpuflags); |
| } |
| |
| static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags) |
| { |
| atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags); |
| } |
| |
| static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags) |
| { |
| return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags; |
| } |
| |
| static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) |
| { |
| return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED); |
| } |
| |
| static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) |
| { |
| return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask); |
| } |
| |
| static inline int kvm_is_ucontrol(struct kvm *kvm) |
| { |
| #ifdef CONFIG_KVM_S390_UCONTROL |
| if (kvm->arch.gmap) |
| return 0; |
| return 1; |
| #else |
| return 0; |
| #endif |
| } |
| |
| #define GUEST_PREFIX_SHIFT 13 |
| static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; |
| } |
| |
| static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) |
| { |
| VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, |
| prefix); |
| vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; |
| kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
| kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); |
| } |
| |
| static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar) |
| { |
| u32 base2 = vcpu->arch.sie_block->ipb >> 28; |
| u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); |
| |
| if (ar) |
| *ar = base2; |
| |
| return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; |
| } |
| |
| static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, |
| u64 *address1, u64 *address2, |
| u8 *ar_b1, u8 *ar_b2) |
| { |
| u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; |
| u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; |
| u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; |
| u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; |
| |
| *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; |
| *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; |
| |
| if (ar_b1) |
| *ar_b1 = base1; |
| if (ar_b2) |
| *ar_b2 = base2; |
| } |
| |
| static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) |
| { |
| if (r1) |
| *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; |
| if (r2) |
| *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; |
| } |
| |
| static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar) |
| { |
| u32 base2 = vcpu->arch.sie_block->ipb >> 28; |
| u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + |
| ((vcpu->arch.sie_block->ipb & 0xff00) << 4); |
| /* The displacement is a 20bit _SIGNED_ value */ |
| if (disp2 & 0x80000) |
| disp2+=0xfff00000; |
| |
| if (ar) |
| *ar = base2; |
| |
| return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; |
| } |
| |
| static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar) |
| { |
| u32 base2 = vcpu->arch.sie_block->ipb >> 28; |
| u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); |
| |
| if (ar) |
| *ar = base2; |
| |
| return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; |
| } |
| |
| /* Set the condition code in the guest program status word */ |
| static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) |
| { |
| vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); |
| vcpu->arch.sie_block->gpsw.mask |= cc << 44; |
| } |
| |
| /* test availability of facility in a kvm instance */ |
| static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) |
| { |
| return __test_facility(nr, kvm->arch.model.fac_mask) && |
| __test_facility(nr, kvm->arch.model.fac_list); |
| } |
| |
| static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) |
| { |
| unsigned char *ptr; |
| |
| if (nr >= MAX_FACILITY_BIT) |
| return -EINVAL; |
| ptr = (unsigned char *) fac_list + (nr >> 3); |
| *ptr |= (0x80UL >> (nr & 7)); |
| return 0; |
| } |
| |
| static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr) |
| { |
| WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS); |
| return test_bit_inv(nr, kvm->arch.cpu_feat); |
| } |
| |
| /* are cpu states controlled by user space */ |
| static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) |
| { |
| return kvm->arch.user_cpu_state_ctrl != 0; |
| } |
| |
| static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm) |
| { |
| if (kvm->arch.user_cpu_state_ctrl) |
| return; |
| |
| VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control"); |
| kvm->arch.user_cpu_state_ctrl = 1; |
| } |
| |
| /* implemented in pv.c */ |
| int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc); |
| int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc); |
| int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc); |
| int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc); |
| int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc, |
| u16 *rrc); |
| int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size, |
| unsigned long tweak, u16 *rc, u16 *rrc); |
| int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state); |
| |
| static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm) |
| { |
| return kvm->arch.pv.handle; |
| } |
| |
| static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.pv.handle; |
| } |
| |
| static inline bool kvm_s390_pv_is_protected(struct kvm *kvm) |
| { |
| lockdep_assert_held(&kvm->lock); |
| return !!kvm_s390_pv_get_handle(kvm); |
| } |
| |
| static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu) |
| { |
| lockdep_assert_held(&vcpu->mutex); |
| return !!kvm_s390_pv_cpu_get_handle(vcpu); |
| } |
| |
| /* implemented in interrupt.c */ |
| int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); |
| void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); |
| enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); |
| int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); |
| void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); |
| void kvm_s390_clear_float_irqs(struct kvm *kvm); |
| int __must_check kvm_s390_inject_vm(struct kvm *kvm, |
| struct kvm_s390_interrupt *s390int); |
| int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, |
| struct kvm_s390_irq *irq); |
| static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, |
| struct kvm_s390_pgm_info *pgm_info) |
| { |
| struct kvm_s390_irq irq = { |
| .type = KVM_S390_PROGRAM_INT, |
| .u.pgm = *pgm_info, |
| }; |
| |
| return kvm_s390_inject_vcpu(vcpu, &irq); |
| } |
| static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) |
| { |
| struct kvm_s390_irq irq = { |
| .type = KVM_S390_PROGRAM_INT, |
| .u.pgm.code = code, |
| }; |
| |
| return kvm_s390_inject_vcpu(vcpu, &irq); |
| } |
| struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
| u64 isc_mask, u32 schid); |
| int kvm_s390_reinject_io_int(struct kvm *kvm, |
| struct kvm_s390_interrupt_info *inti); |
| int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); |
| |
| /* implemented in intercept.c */ |
| u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); |
| int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); |
| static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) |
| { |
| struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; |
| |
| sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); |
| } |
| static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) |
| { |
| kvm_s390_rewind_psw(vcpu, -ilen); |
| } |
| static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) |
| { |
| /* don't inject PER events if we re-execute the instruction */ |
| vcpu->arch.sie_block->icptstatus &= ~0x02; |
| kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); |
| } |
| |
| int handle_sthyi(struct kvm_vcpu *vcpu); |
| |
| /* implemented in priv.c */ |
| int is_valid_psw(psw_t *psw); |
| int kvm_s390_handle_aa(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_e3(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_01(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); |
| int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu); |
| |
| /* implemented in vsie.c */ |
| int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu); |
| void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu); |
| void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, |
| unsigned long end); |
| void kvm_s390_vsie_init(struct kvm *kvm); |
| void kvm_s390_vsie_destroy(struct kvm *kvm); |
| |
| /* implemented in sigp.c */ |
| int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); |
| |
| /* implemented in kvm-s390.c */ |
| void kvm_s390_set_tod_clock(struct kvm *kvm, |
| const struct kvm_s390_vm_tod_clock *gtod); |
| long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable); |
| int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); |
| int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); |
| int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); |
| int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); |
| void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); |
| void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); |
| bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu); |
| void exit_sie(struct kvm_vcpu *vcpu); |
| void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); |
| int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); |
| void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); |
| void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); |
| __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); |
| |
| /* implemented in diag.c */ |
| int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); |
| |
| static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) |
| { |
| unsigned long i; |
| struct kvm_vcpu *vcpu; |
| |
| WARN_ON(!mutex_is_locked(&kvm->lock)); |
| kvm_for_each_vcpu(i, vcpu, kvm) |
| kvm_s390_vcpu_block(vcpu); |
| } |
| |
| static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) |
| { |
| unsigned long i; |
| struct kvm_vcpu *vcpu; |
| |
| kvm_for_each_vcpu(i, vcpu, kvm) |
| kvm_s390_vcpu_unblock(vcpu); |
| } |
| |
| static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) |
| { |
| u64 rc; |
| |
| preempt_disable(); |
| rc = get_tod_clock_fast() + kvm->arch.epoch; |
| preempt_enable(); |
| return rc; |
| } |
| |
| /** |
| * kvm_s390_inject_prog_cond - conditionally inject a program check |
| * @vcpu: virtual cpu |
| * @rc: original return/error code |
| * |
| * This function is supposed to be used after regular guest access functions |
| * failed, to conditionally inject a program check to a vcpu. The typical |
| * pattern would look like |
| * |
| * rc = write_guest(vcpu, addr, data, len); |
| * if (rc) |
| * return kvm_s390_inject_prog_cond(vcpu, rc); |
| * |
| * A negative return code from guest access functions implies an internal error |
| * like e.g. out of memory. In these cases no program check should be injected |
| * to the guest. |
| * A positive value implies that an exception happened while accessing a guest's |
| * memory. In this case all data belonging to the corresponding program check |
| * has been stored in vcpu->arch.pgm and can be injected with |
| * kvm_s390_inject_prog_irq(). |
| * |
| * Returns: - the original @rc value if @rc was negative (internal error) |
| * - zero if @rc was already zero |
| * - zero or error code from injecting if @rc was positive |
| * (program check injected to @vcpu) |
| */ |
| static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) |
| { |
| if (rc <= 0) |
| return rc; |
| return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); |
| } |
| |
| int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
| struct kvm_s390_irq *s390irq); |
| |
| /* implemented in interrupt.c */ |
| int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); |
| int psw_extint_disabled(struct kvm_vcpu *vcpu); |
| void kvm_s390_destroy_adapters(struct kvm *kvm); |
| int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); |
| extern struct kvm_device_ops kvm_flic_ops; |
| int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); |
| void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); |
| int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, |
| void __user *buf, int len); |
| int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, |
| __u8 __user *buf, int len); |
| void kvm_s390_gisa_init(struct kvm *kvm); |
| void kvm_s390_gisa_clear(struct kvm *kvm); |
| void kvm_s390_gisa_destroy(struct kvm *kvm); |
| int kvm_s390_gib_init(u8 nisc); |
| void kvm_s390_gib_destroy(void); |
| |
| /* implemented in guestdbg.c */ |
| void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); |
| void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); |
| void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); |
| int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, |
| struct kvm_guest_debug *dbg); |
| void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); |
| void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); |
| int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); |
| |
| /* support for Basic/Extended SCA handling */ |
| static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) |
| { |
| struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ |
| |
| return &sca->ipte_control; |
| } |
| static inline int kvm_s390_use_sca_entries(void) |
| { |
| /* |
| * Without SIGP interpretation, only SRS interpretation (if available) |
| * might use the entries. By not setting the entries and keeping them |
| * invalid, hardware will not access them but intercept. |
| */ |
| return sclp.has_sigpif; |
| } |
| void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, |
| struct mcck_volatile_info *mcck_info); |
| |
| /** |
| * kvm_s390_vcpu_crypto_reset_all |
| * |
| * Reset the crypto attributes for each vcpu. This can be done while the vcpus |
| * are running as each vcpu will be removed from SIE before resetting the crypt |
| * attributes and restored to SIE afterward. |
| * |
| * Note: The kvm->lock must be held while calling this function |
| * |
| * @kvm: the KVM guest |
| */ |
| void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm); |
| |
| /** |
| * diag9c_forwarding_hz |
| * |
| * Set the maximum number of diag9c forwarding per second |
| */ |
| extern unsigned int diag9c_forwarding_hz; |
| |
| #endif |