| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. |
| * Authors: Sanjay Lal <sanjayl@kymasys.com> |
| */ |
| |
| #ifndef __MIPS_KVM_HOST_H__ |
| #define __MIPS_KVM_HOST_H__ |
| |
| #include <linux/cpumask.h> |
| #include <linux/mutex.h> |
| #include <linux/hrtimer.h> |
| #include <linux/interrupt.h> |
| #include <linux/types.h> |
| #include <linux/kvm.h> |
| #include <linux/kvm_types.h> |
| #include <linux/threads.h> |
| #include <linux/spinlock.h> |
| |
| #include <asm/asm.h> |
| #include <asm/inst.h> |
| #include <asm/mipsregs.h> |
| |
| #include <kvm/iodev.h> |
| |
| /* MIPS KVM register ids */ |
| #define MIPS_CP0_32(_R, _S) \ |
| (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S))) |
| |
| #define MIPS_CP0_64(_R, _S) \ |
| (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U64 | (8 * (_R) + (_S))) |
| |
| #define KVM_REG_MIPS_CP0_INDEX MIPS_CP0_32(0, 0) |
| #define KVM_REG_MIPS_CP0_ENTRYLO0 MIPS_CP0_64(2, 0) |
| #define KVM_REG_MIPS_CP0_ENTRYLO1 MIPS_CP0_64(3, 0) |
| #define KVM_REG_MIPS_CP0_CONTEXT MIPS_CP0_64(4, 0) |
| #define KVM_REG_MIPS_CP0_CONTEXTCONFIG MIPS_CP0_32(4, 1) |
| #define KVM_REG_MIPS_CP0_USERLOCAL MIPS_CP0_64(4, 2) |
| #define KVM_REG_MIPS_CP0_XCONTEXTCONFIG MIPS_CP0_64(4, 3) |
| #define KVM_REG_MIPS_CP0_PAGEMASK MIPS_CP0_32(5, 0) |
| #define KVM_REG_MIPS_CP0_PAGEGRAIN MIPS_CP0_32(5, 1) |
| #define KVM_REG_MIPS_CP0_SEGCTL0 MIPS_CP0_64(5, 2) |
| #define KVM_REG_MIPS_CP0_SEGCTL1 MIPS_CP0_64(5, 3) |
| #define KVM_REG_MIPS_CP0_SEGCTL2 MIPS_CP0_64(5, 4) |
| #define KVM_REG_MIPS_CP0_PWBASE MIPS_CP0_64(5, 5) |
| #define KVM_REG_MIPS_CP0_PWFIELD MIPS_CP0_64(5, 6) |
| #define KVM_REG_MIPS_CP0_PWSIZE MIPS_CP0_64(5, 7) |
| #define KVM_REG_MIPS_CP0_WIRED MIPS_CP0_32(6, 0) |
| #define KVM_REG_MIPS_CP0_PWCTL MIPS_CP0_32(6, 6) |
| #define KVM_REG_MIPS_CP0_HWRENA MIPS_CP0_32(7, 0) |
| #define KVM_REG_MIPS_CP0_BADVADDR MIPS_CP0_64(8, 0) |
| #define KVM_REG_MIPS_CP0_BADINSTR MIPS_CP0_32(8, 1) |
| #define KVM_REG_MIPS_CP0_BADINSTRP MIPS_CP0_32(8, 2) |
| #define KVM_REG_MIPS_CP0_COUNT MIPS_CP0_32(9, 0) |
| #define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0) |
| #define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0) |
| #define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0) |
| #define KVM_REG_MIPS_CP0_INTCTL MIPS_CP0_32(12, 1) |
| #define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0) |
| #define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0) |
| #define KVM_REG_MIPS_CP0_PRID MIPS_CP0_32(15, 0) |
| #define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1) |
| #define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0) |
| #define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1) |
| #define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2) |
| #define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3) |
| #define KVM_REG_MIPS_CP0_CONFIG4 MIPS_CP0_32(16, 4) |
| #define KVM_REG_MIPS_CP0_CONFIG5 MIPS_CP0_32(16, 5) |
| #define KVM_REG_MIPS_CP0_CONFIG6 MIPS_CP0_32(16, 6) |
| #define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7) |
| #define KVM_REG_MIPS_CP0_MAARI MIPS_CP0_64(17, 2) |
| #define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0) |
| #define KVM_REG_MIPS_CP0_DIAG MIPS_CP0_32(22, 0) |
| #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0) |
| #define KVM_REG_MIPS_CP0_KSCRATCH1 MIPS_CP0_64(31, 2) |
| #define KVM_REG_MIPS_CP0_KSCRATCH2 MIPS_CP0_64(31, 3) |
| #define KVM_REG_MIPS_CP0_KSCRATCH3 MIPS_CP0_64(31, 4) |
| #define KVM_REG_MIPS_CP0_KSCRATCH4 MIPS_CP0_64(31, 5) |
| #define KVM_REG_MIPS_CP0_KSCRATCH5 MIPS_CP0_64(31, 6) |
| #define KVM_REG_MIPS_CP0_KSCRATCH6 MIPS_CP0_64(31, 7) |
| |
| |
| #define KVM_MAX_VCPUS 16 |
| |
| #define KVM_HALT_POLL_NS_DEFAULT 500000 |
| |
| extern unsigned long GUESTID_MASK; |
| extern unsigned long GUESTID_FIRST_VERSION; |
| extern unsigned long GUESTID_VERSION_MASK; |
| |
| #define KVM_INVALID_ADDR 0xdeadbeef |
| |
| /* |
| * EVA has overlapping user & kernel address spaces, so user VAs may be > |
| * PAGE_OFFSET. For this reason we can't use the default KVM_HVA_ERR_BAD of |
| * PAGE_OFFSET. |
| */ |
| |
| #define KVM_HVA_ERR_BAD (-1UL) |
| #define KVM_HVA_ERR_RO_BAD (-2UL) |
| |
| static inline bool kvm_is_error_hva(unsigned long addr) |
| { |
| return IS_ERR_VALUE(addr); |
| } |
| |
| struct kvm_vm_stat { |
| struct kvm_vm_stat_generic generic; |
| }; |
| |
| struct kvm_vcpu_stat { |
| struct kvm_vcpu_stat_generic generic; |
| u64 wait_exits; |
| u64 cache_exits; |
| u64 signal_exits; |
| u64 int_exits; |
| u64 cop_unusable_exits; |
| u64 tlbmod_exits; |
| u64 tlbmiss_ld_exits; |
| u64 tlbmiss_st_exits; |
| u64 addrerr_st_exits; |
| u64 addrerr_ld_exits; |
| u64 syscall_exits; |
| u64 resvd_inst_exits; |
| u64 break_inst_exits; |
| u64 trap_inst_exits; |
| u64 msa_fpe_exits; |
| u64 fpe_exits; |
| u64 msa_disabled_exits; |
| u64 flush_dcache_exits; |
| u64 vz_gpsi_exits; |
| u64 vz_gsfc_exits; |
| u64 vz_hc_exits; |
| u64 vz_grr_exits; |
| u64 vz_gva_exits; |
| u64 vz_ghfc_exits; |
| u64 vz_gpa_exits; |
| u64 vz_resvd_exits; |
| #ifdef CONFIG_CPU_LOONGSON64 |
| u64 vz_cpucfg_exits; |
| #endif |
| }; |
| |
| struct kvm_arch_memory_slot { |
| }; |
| |
| #ifdef CONFIG_CPU_LOONGSON64 |
| struct ipi_state { |
| uint32_t status; |
| uint32_t en; |
| uint32_t set; |
| uint32_t clear; |
| uint64_t buf[4]; |
| }; |
| |
| struct loongson_kvm_ipi; |
| |
| struct ipi_io_device { |
| int node_id; |
| struct loongson_kvm_ipi *ipi; |
| struct kvm_io_device device; |
| }; |
| |
| struct loongson_kvm_ipi { |
| spinlock_t lock; |
| struct kvm *kvm; |
| struct ipi_state ipistate[16]; |
| struct ipi_io_device dev_ipi[4]; |
| }; |
| #endif |
| |
| struct kvm_arch { |
| /* Guest physical mm */ |
| struct mm_struct gpa_mm; |
| /* Mask of CPUs needing GPA ASID flush */ |
| cpumask_t asid_flush_mask; |
| #ifdef CONFIG_CPU_LOONGSON64 |
| struct loongson_kvm_ipi ipi; |
| #endif |
| }; |
| |
| #define N_MIPS_COPROC_REGS 32 |
| #define N_MIPS_COPROC_SEL 8 |
| |
| struct mips_coproc { |
| unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; |
| #ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS |
| unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; |
| #endif |
| }; |
| |
| /* |
| * Coprocessor 0 register names |
| */ |
| #define MIPS_CP0_TLB_INDEX 0 |
| #define MIPS_CP0_TLB_RANDOM 1 |
| #define MIPS_CP0_TLB_LOW 2 |
| #define MIPS_CP0_TLB_LO0 2 |
| #define MIPS_CP0_TLB_LO1 3 |
| #define MIPS_CP0_TLB_CONTEXT 4 |
| #define MIPS_CP0_TLB_PG_MASK 5 |
| #define MIPS_CP0_TLB_WIRED 6 |
| #define MIPS_CP0_HWRENA 7 |
| #define MIPS_CP0_BAD_VADDR 8 |
| #define MIPS_CP0_COUNT 9 |
| #define MIPS_CP0_TLB_HI 10 |
| #define MIPS_CP0_COMPARE 11 |
| #define MIPS_CP0_STATUS 12 |
| #define MIPS_CP0_CAUSE 13 |
| #define MIPS_CP0_EXC_PC 14 |
| #define MIPS_CP0_PRID 15 |
| #define MIPS_CP0_CONFIG 16 |
| #define MIPS_CP0_LLADDR 17 |
| #define MIPS_CP0_WATCH_LO 18 |
| #define MIPS_CP0_WATCH_HI 19 |
| #define MIPS_CP0_TLB_XCONTEXT 20 |
| #define MIPS_CP0_DIAG 22 |
| #define MIPS_CP0_ECC 26 |
| #define MIPS_CP0_CACHE_ERR 27 |
| #define MIPS_CP0_TAG_LO 28 |
| #define MIPS_CP0_TAG_HI 29 |
| #define MIPS_CP0_ERROR_PC 30 |
| #define MIPS_CP0_DEBUG 23 |
| #define MIPS_CP0_DEPC 24 |
| #define MIPS_CP0_PERFCNT 25 |
| #define MIPS_CP0_ERRCTL 26 |
| #define MIPS_CP0_DATA_LO 28 |
| #define MIPS_CP0_DATA_HI 29 |
| #define MIPS_CP0_DESAVE 31 |
| |
| #define MIPS_CP0_CONFIG_SEL 0 |
| #define MIPS_CP0_CONFIG1_SEL 1 |
| #define MIPS_CP0_CONFIG2_SEL 2 |
| #define MIPS_CP0_CONFIG3_SEL 3 |
| #define MIPS_CP0_CONFIG4_SEL 4 |
| #define MIPS_CP0_CONFIG5_SEL 5 |
| |
| #define MIPS_CP0_GUESTCTL2 10 |
| #define MIPS_CP0_GUESTCTL2_SEL 5 |
| #define MIPS_CP0_GTOFFSET 12 |
| #define MIPS_CP0_GTOFFSET_SEL 7 |
| |
| /* Resume Flags */ |
| #define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */ |
| #define RESUME_FLAG_HOST (1<<1) /* Resume host? */ |
| |
| #define RESUME_GUEST 0 |
| #define RESUME_GUEST_DR RESUME_FLAG_DR |
| #define RESUME_HOST RESUME_FLAG_HOST |
| |
| enum emulation_result { |
| EMULATE_DONE, /* no further processing */ |
| EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */ |
| EMULATE_FAIL, /* can't emulate this instruction */ |
| EMULATE_WAIT, /* WAIT instruction */ |
| EMULATE_PRIV_FAIL, |
| EMULATE_EXCEPT, /* A guest exception has been generated */ |
| EMULATE_HYPERCALL, /* HYPCALL instruction */ |
| }; |
| |
| #if defined(CONFIG_64BIT) |
| #define VPN2_MASK GENMASK(cpu_vmbits - 1, 13) |
| #else |
| #define VPN2_MASK 0xffffe000 |
| #endif |
| #define KVM_ENTRYHI_ASID cpu_asid_mask(&boot_cpu_data) |
| #define TLB_IS_GLOBAL(x) ((x).tlb_lo[0] & (x).tlb_lo[1] & ENTRYLO_G) |
| #define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK) |
| #define TLB_ASID(x) ((x).tlb_hi & KVM_ENTRYHI_ASID) |
| #define TLB_LO_IDX(x, va) (((va) >> PAGE_SHIFT) & 1) |
| #define TLB_IS_VALID(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_V) |
| #define TLB_IS_DIRTY(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_D) |
| #define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \ |
| ((y) & VPN2_MASK & ~(x).tlb_mask)) |
| #define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \ |
| TLB_ASID(x) == ((y) & KVM_ENTRYHI_ASID)) |
| |
| struct kvm_mips_tlb { |
| long tlb_mask; |
| long tlb_hi; |
| long tlb_lo[2]; |
| }; |
| |
| #define KVM_MIPS_AUX_FPU 0x1 |
| #define KVM_MIPS_AUX_MSA 0x2 |
| |
| struct kvm_vcpu_arch { |
| void *guest_ebase; |
| int (*vcpu_run)(struct kvm_vcpu *vcpu); |
| |
| /* Host registers preserved across guest mode execution */ |
| unsigned long host_stack; |
| unsigned long host_gp; |
| unsigned long host_pgd; |
| unsigned long host_entryhi; |
| |
| /* Host CP0 registers used when handling exits from guest */ |
| unsigned long host_cp0_badvaddr; |
| unsigned long host_cp0_epc; |
| u32 host_cp0_cause; |
| u32 host_cp0_guestctl0; |
| u32 host_cp0_badinstr; |
| u32 host_cp0_badinstrp; |
| |
| /* GPRS */ |
| unsigned long gprs[32]; |
| unsigned long hi; |
| unsigned long lo; |
| unsigned long pc; |
| |
| /* FPU State */ |
| struct mips_fpu_struct fpu; |
| /* Which auxiliary state is loaded (KVM_MIPS_AUX_*) */ |
| unsigned int aux_inuse; |
| |
| /* COP0 State */ |
| struct mips_coproc cop0; |
| |
| /* Resume PC after MMIO completion */ |
| unsigned long io_pc; |
| /* GPR used as IO source/target */ |
| u32 io_gpr; |
| |
| struct hrtimer comparecount_timer; |
| /* Count timer control KVM register */ |
| u32 count_ctl; |
| /* Count bias from the raw time */ |
| u32 count_bias; |
| /* Frequency of timer in Hz */ |
| u32 count_hz; |
| /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */ |
| s64 count_dyn_bias; |
| /* Resume time */ |
| ktime_t count_resume; |
| /* Period of timer tick in ns */ |
| u64 count_period; |
| |
| /* Bitmask of exceptions that are pending */ |
| unsigned long pending_exceptions; |
| |
| /* Bitmask of pending exceptions to be cleared */ |
| unsigned long pending_exceptions_clr; |
| |
| /* Cache some mmu pages needed inside spinlock regions */ |
| struct kvm_mmu_memory_cache mmu_page_cache; |
| |
| /* vcpu's vzguestid is different on each host cpu in an smp system */ |
| u32 vzguestid[NR_CPUS]; |
| |
| /* wired guest TLB entries */ |
| struct kvm_mips_tlb *wired_tlb; |
| unsigned int wired_tlb_limit; |
| unsigned int wired_tlb_used; |
| |
| /* emulated guest MAAR registers */ |
| unsigned long maar[6]; |
| |
| /* Last CPU the VCPU state was loaded on */ |
| int last_sched_cpu; |
| /* Last CPU the VCPU actually executed guest code on */ |
| int last_exec_cpu; |
| |
| /* WAIT executed */ |
| int wait; |
| |
| u8 fpu_enabled; |
| u8 msa_enabled; |
| }; |
| |
| static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg, |
| unsigned long val) |
| { |
| unsigned long temp; |
| do { |
| __asm__ __volatile__( |
| " .set push \n" |
| " .set "MIPS_ISA_ARCH_LEVEL" \n" |
| " "__stringify(LONG_LL) " %0, %1 \n" |
| " or %0, %2 \n" |
| " "__stringify(LONG_SC) " %0, %1 \n" |
| " .set pop \n" |
| : "=&r" (temp), "+m" (*reg) |
| : "r" (val)); |
| } while (unlikely(!temp)); |
| } |
| |
| static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg, |
| unsigned long val) |
| { |
| unsigned long temp; |
| do { |
| __asm__ __volatile__( |
| " .set push \n" |
| " .set "MIPS_ISA_ARCH_LEVEL" \n" |
| " "__stringify(LONG_LL) " %0, %1 \n" |
| " and %0, %2 \n" |
| " "__stringify(LONG_SC) " %0, %1 \n" |
| " .set pop \n" |
| : "=&r" (temp), "+m" (*reg) |
| : "r" (~val)); |
| } while (unlikely(!temp)); |
| } |
| |
| static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg, |
| unsigned long change, |
| unsigned long val) |
| { |
| unsigned long temp; |
| do { |
| __asm__ __volatile__( |
| " .set push \n" |
| " .set "MIPS_ISA_ARCH_LEVEL" \n" |
| " "__stringify(LONG_LL) " %0, %1 \n" |
| " and %0, %2 \n" |
| " or %0, %3 \n" |
| " "__stringify(LONG_SC) " %0, %1 \n" |
| " .set pop \n" |
| : "=&r" (temp), "+m" (*reg) |
| : "r" (~change), "r" (val & change)); |
| } while (unlikely(!temp)); |
| } |
| |
| /* Guest register types, used in accessor build below */ |
| #define __KVMT32 u32 |
| #define __KVMTl unsigned long |
| |
| /* |
| * __BUILD_KVM_$ops_SAVED(): kvm_$op_sw_gc0_$reg() |
| * These operate on the saved guest C0 state in RAM. |
| */ |
| |
| /* Generate saved context simple accessors */ |
| #define __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \ |
| static inline __KVMT##type kvm_read_sw_gc0_##name(struct mips_coproc *cop0) \ |
| { \ |
| return cop0->reg[(_reg)][(sel)]; \ |
| } \ |
| static inline void kvm_write_sw_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| cop0->reg[(_reg)][(sel)] = val; \ |
| } |
| |
| /* Generate saved context bitwise modifiers */ |
| #define __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \ |
| static inline void kvm_set_sw_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| cop0->reg[(_reg)][(sel)] |= val; \ |
| } \ |
| static inline void kvm_clear_sw_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| cop0->reg[(_reg)][(sel)] &= ~val; \ |
| } \ |
| static inline void kvm_change_sw_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type mask, \ |
| __KVMT##type val) \ |
| { \ |
| unsigned long _mask = mask; \ |
| cop0->reg[(_reg)][(sel)] &= ~_mask; \ |
| cop0->reg[(_reg)][(sel)] |= val & _mask; \ |
| } |
| |
| /* Generate saved context atomic bitwise modifiers */ |
| #define __BUILD_KVM_ATOMIC_SAVED(name, type, _reg, sel) \ |
| static inline void kvm_set_sw_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| _kvm_atomic_set_c0_guest_reg(&cop0->reg[(_reg)][(sel)], val); \ |
| } \ |
| static inline void kvm_clear_sw_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| _kvm_atomic_clear_c0_guest_reg(&cop0->reg[(_reg)][(sel)], val); \ |
| } \ |
| static inline void kvm_change_sw_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type mask, \ |
| __KVMT##type val) \ |
| { \ |
| _kvm_atomic_change_c0_guest_reg(&cop0->reg[(_reg)][(sel)], mask, \ |
| val); \ |
| } |
| |
| /* |
| * __BUILD_KVM_$ops_VZ(): kvm_$op_vz_gc0_$reg() |
| * These operate on the VZ guest C0 context in hardware. |
| */ |
| |
| /* Generate VZ guest context simple accessors */ |
| #define __BUILD_KVM_RW_VZ(name, type, _reg, sel) \ |
| static inline __KVMT##type kvm_read_vz_gc0_##name(struct mips_coproc *cop0) \ |
| { \ |
| return read_gc0_##name(); \ |
| } \ |
| static inline void kvm_write_vz_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| write_gc0_##name(val); \ |
| } |
| |
| /* Generate VZ guest context bitwise modifiers */ |
| #define __BUILD_KVM_SET_VZ(name, type, _reg, sel) \ |
| static inline void kvm_set_vz_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| set_gc0_##name(val); \ |
| } \ |
| static inline void kvm_clear_vz_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| clear_gc0_##name(val); \ |
| } \ |
| static inline void kvm_change_vz_gc0_##name(struct mips_coproc *cop0, \ |
| __KVMT##type mask, \ |
| __KVMT##type val) \ |
| { \ |
| change_gc0_##name(mask, val); \ |
| } |
| |
| /* Generate VZ guest context save/restore to/from saved context */ |
| #define __BUILD_KVM_SAVE_VZ(name, _reg, sel) \ |
| static inline void kvm_restore_gc0_##name(struct mips_coproc *cop0) \ |
| { \ |
| write_gc0_##name(cop0->reg[(_reg)][(sel)]); \ |
| } \ |
| static inline void kvm_save_gc0_##name(struct mips_coproc *cop0) \ |
| { \ |
| cop0->reg[(_reg)][(sel)] = read_gc0_##name(); \ |
| } |
| |
| /* |
| * __BUILD_KVM_$ops_WRAP(): kvm_$op_$name1() -> kvm_$op_$name2() |
| * These wrap a set of operations to provide them with a different name. |
| */ |
| |
| /* Generate simple accessor wrapper */ |
| #define __BUILD_KVM_RW_WRAP(name1, name2, type) \ |
| static inline __KVMT##type kvm_read_##name1(struct mips_coproc *cop0) \ |
| { \ |
| return kvm_read_##name2(cop0); \ |
| } \ |
| static inline void kvm_write_##name1(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| kvm_write_##name2(cop0, val); \ |
| } |
| |
| /* Generate bitwise modifier wrapper */ |
| #define __BUILD_KVM_SET_WRAP(name1, name2, type) \ |
| static inline void kvm_set_##name1(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| kvm_set_##name2(cop0, val); \ |
| } \ |
| static inline void kvm_clear_##name1(struct mips_coproc *cop0, \ |
| __KVMT##type val) \ |
| { \ |
| kvm_clear_##name2(cop0, val); \ |
| } \ |
| static inline void kvm_change_##name1(struct mips_coproc *cop0, \ |
| __KVMT##type mask, \ |
| __KVMT##type val) \ |
| { \ |
| kvm_change_##name2(cop0, mask, val); \ |
| } |
| |
| /* |
| * __BUILD_KVM_$ops_SW(): kvm_$op_c0_guest_$reg() -> kvm_$op_sw_gc0_$reg() |
| * These generate accessors operating on the saved context in RAM, and wrap them |
| * with the common guest C0 accessors (for use by common emulation code). |
| */ |
| |
| #define __BUILD_KVM_RW_SW(name, type, _reg, sel) \ |
| __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \ |
| __BUILD_KVM_RW_WRAP(c0_guest_##name, sw_gc0_##name, type) |
| |
| #define __BUILD_KVM_SET_SW(name, type, _reg, sel) \ |
| __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \ |
| __BUILD_KVM_SET_WRAP(c0_guest_##name, sw_gc0_##name, type) |
| |
| #define __BUILD_KVM_ATOMIC_SW(name, type, _reg, sel) \ |
| __BUILD_KVM_ATOMIC_SAVED(name, type, _reg, sel) \ |
| __BUILD_KVM_SET_WRAP(c0_guest_##name, sw_gc0_##name, type) |
| |
| /* |
| * VZ (hardware assisted virtualisation) |
| * These macros use the active guest state in VZ mode (hardware registers), |
| */ |
| |
| /* |
| * __BUILD_KVM_$ops_HW(): kvm_$op_c0_guest_$reg() -> kvm_$op_vz_gc0_$reg() |
| * These generate accessors operating on the VZ guest context in hardware, and |
| * wrap them with the common guest C0 accessors (for use by common emulation |
| * code). |
| * |
| * Accessors operating on the saved context in RAM are also generated to allow |
| * convenient explicit saving and restoring of the state. |
| */ |
| |
| #define __BUILD_KVM_RW_HW(name, type, _reg, sel) \ |
| __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \ |
| __BUILD_KVM_RW_VZ(name, type, _reg, sel) \ |
| __BUILD_KVM_RW_WRAP(c0_guest_##name, vz_gc0_##name, type) \ |
| __BUILD_KVM_SAVE_VZ(name, _reg, sel) |
| |
| #define __BUILD_KVM_SET_HW(name, type, _reg, sel) \ |
| __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \ |
| __BUILD_KVM_SET_VZ(name, type, _reg, sel) \ |
| __BUILD_KVM_SET_WRAP(c0_guest_##name, vz_gc0_##name, type) |
| |
| /* |
| * We can't do atomic modifications of COP0 state if hardware can modify it. |
| * Races must be handled explicitly. |
| */ |
| #define __BUILD_KVM_ATOMIC_HW __BUILD_KVM_SET_HW |
| |
| /* |
| * Define accessors for CP0 registers that are accessible to the guest. These |
| * are primarily used by common emulation code, which may need to access the |
| * registers differently depending on the implementation. |
| * |
| * fns_hw/sw name type reg num select |
| */ |
| __BUILD_KVM_RW_HW(index, 32, MIPS_CP0_TLB_INDEX, 0) |
| __BUILD_KVM_RW_HW(entrylo0, l, MIPS_CP0_TLB_LO0, 0) |
| __BUILD_KVM_RW_HW(entrylo1, l, MIPS_CP0_TLB_LO1, 0) |
| __BUILD_KVM_RW_HW(context, l, MIPS_CP0_TLB_CONTEXT, 0) |
| __BUILD_KVM_RW_HW(contextconfig, 32, MIPS_CP0_TLB_CONTEXT, 1) |
| __BUILD_KVM_RW_HW(userlocal, l, MIPS_CP0_TLB_CONTEXT, 2) |
| __BUILD_KVM_RW_HW(xcontextconfig, l, MIPS_CP0_TLB_CONTEXT, 3) |
| __BUILD_KVM_RW_HW(pagemask, l, MIPS_CP0_TLB_PG_MASK, 0) |
| __BUILD_KVM_RW_HW(pagegrain, 32, MIPS_CP0_TLB_PG_MASK, 1) |
| __BUILD_KVM_RW_HW(segctl0, l, MIPS_CP0_TLB_PG_MASK, 2) |
| __BUILD_KVM_RW_HW(segctl1, l, MIPS_CP0_TLB_PG_MASK, 3) |
| __BUILD_KVM_RW_HW(segctl2, l, MIPS_CP0_TLB_PG_MASK, 4) |
| __BUILD_KVM_RW_HW(pwbase, l, MIPS_CP0_TLB_PG_MASK, 5) |
| __BUILD_KVM_RW_HW(pwfield, l, MIPS_CP0_TLB_PG_MASK, 6) |
| __BUILD_KVM_RW_HW(pwsize, l, MIPS_CP0_TLB_PG_MASK, 7) |
| __BUILD_KVM_RW_HW(wired, 32, MIPS_CP0_TLB_WIRED, 0) |
| __BUILD_KVM_RW_HW(pwctl, 32, MIPS_CP0_TLB_WIRED, 6) |
| __BUILD_KVM_RW_HW(hwrena, 32, MIPS_CP0_HWRENA, 0) |
| __BUILD_KVM_RW_HW(badvaddr, l, MIPS_CP0_BAD_VADDR, 0) |
| __BUILD_KVM_RW_HW(badinstr, 32, MIPS_CP0_BAD_VADDR, 1) |
| __BUILD_KVM_RW_HW(badinstrp, 32, MIPS_CP0_BAD_VADDR, 2) |
| __BUILD_KVM_RW_SW(count, 32, MIPS_CP0_COUNT, 0) |
| __BUILD_KVM_RW_HW(entryhi, l, MIPS_CP0_TLB_HI, 0) |
| __BUILD_KVM_RW_HW(compare, 32, MIPS_CP0_COMPARE, 0) |
| __BUILD_KVM_RW_HW(status, 32, MIPS_CP0_STATUS, 0) |
| __BUILD_KVM_RW_HW(intctl, 32, MIPS_CP0_STATUS, 1) |
| __BUILD_KVM_RW_HW(cause, 32, MIPS_CP0_CAUSE, 0) |
| __BUILD_KVM_RW_HW(epc, l, MIPS_CP0_EXC_PC, 0) |
| __BUILD_KVM_RW_SW(prid, 32, MIPS_CP0_PRID, 0) |
| __BUILD_KVM_RW_HW(ebase, l, MIPS_CP0_PRID, 1) |
| __BUILD_KVM_RW_HW(config, 32, MIPS_CP0_CONFIG, 0) |
| __BUILD_KVM_RW_HW(config1, 32, MIPS_CP0_CONFIG, 1) |
| __BUILD_KVM_RW_HW(config2, 32, MIPS_CP0_CONFIG, 2) |
| __BUILD_KVM_RW_HW(config3, 32, MIPS_CP0_CONFIG, 3) |
| __BUILD_KVM_RW_HW(config4, 32, MIPS_CP0_CONFIG, 4) |
| __BUILD_KVM_RW_HW(config5, 32, MIPS_CP0_CONFIG, 5) |
| __BUILD_KVM_RW_HW(config6, 32, MIPS_CP0_CONFIG, 6) |
| __BUILD_KVM_RW_HW(config7, 32, MIPS_CP0_CONFIG, 7) |
| __BUILD_KVM_RW_SW(maari, l, MIPS_CP0_LLADDR, 2) |
| __BUILD_KVM_RW_HW(xcontext, l, MIPS_CP0_TLB_XCONTEXT, 0) |
| __BUILD_KVM_RW_HW(errorepc, l, MIPS_CP0_ERROR_PC, 0) |
| __BUILD_KVM_RW_HW(kscratch1, l, MIPS_CP0_DESAVE, 2) |
| __BUILD_KVM_RW_HW(kscratch2, l, MIPS_CP0_DESAVE, 3) |
| __BUILD_KVM_RW_HW(kscratch3, l, MIPS_CP0_DESAVE, 4) |
| __BUILD_KVM_RW_HW(kscratch4, l, MIPS_CP0_DESAVE, 5) |
| __BUILD_KVM_RW_HW(kscratch5, l, MIPS_CP0_DESAVE, 6) |
| __BUILD_KVM_RW_HW(kscratch6, l, MIPS_CP0_DESAVE, 7) |
| |
| /* Bitwise operations (on HW state) */ |
| __BUILD_KVM_SET_HW(status, 32, MIPS_CP0_STATUS, 0) |
| /* Cause can be modified asynchronously from hardirq hrtimer callback */ |
| __BUILD_KVM_ATOMIC_HW(cause, 32, MIPS_CP0_CAUSE, 0) |
| __BUILD_KVM_SET_HW(ebase, l, MIPS_CP0_PRID, 1) |
| |
| /* Bitwise operations (on saved state) */ |
| __BUILD_KVM_SET_SAVED(config, 32, MIPS_CP0_CONFIG, 0) |
| __BUILD_KVM_SET_SAVED(config1, 32, MIPS_CP0_CONFIG, 1) |
| __BUILD_KVM_SET_SAVED(config2, 32, MIPS_CP0_CONFIG, 2) |
| __BUILD_KVM_SET_SAVED(config3, 32, MIPS_CP0_CONFIG, 3) |
| __BUILD_KVM_SET_SAVED(config4, 32, MIPS_CP0_CONFIG, 4) |
| __BUILD_KVM_SET_SAVED(config5, 32, MIPS_CP0_CONFIG, 5) |
| |
| /* Helpers */ |
| |
| static inline bool kvm_mips_guest_can_have_fpu(struct kvm_vcpu_arch *vcpu) |
| { |
| return (!__builtin_constant_p(raw_cpu_has_fpu) || raw_cpu_has_fpu) && |
| vcpu->fpu_enabled; |
| } |
| |
| static inline bool kvm_mips_guest_has_fpu(struct kvm_vcpu_arch *vcpu) |
| { |
| return kvm_mips_guest_can_have_fpu(vcpu) && |
| kvm_read_c0_guest_config1(&vcpu->cop0) & MIPS_CONF1_FP; |
| } |
| |
| static inline bool kvm_mips_guest_can_have_msa(struct kvm_vcpu_arch *vcpu) |
| { |
| return (!__builtin_constant_p(cpu_has_msa) || cpu_has_msa) && |
| vcpu->msa_enabled; |
| } |
| |
| static inline bool kvm_mips_guest_has_msa(struct kvm_vcpu_arch *vcpu) |
| { |
| return kvm_mips_guest_can_have_msa(vcpu) && |
| kvm_read_c0_guest_config3(&vcpu->cop0) & MIPS_CONF3_MSA; |
| } |
| |
| struct kvm_mips_callbacks { |
| int (*handle_cop_unusable)(struct kvm_vcpu *vcpu); |
| int (*handle_tlb_mod)(struct kvm_vcpu *vcpu); |
| int (*handle_tlb_ld_miss)(struct kvm_vcpu *vcpu); |
| int (*handle_tlb_st_miss)(struct kvm_vcpu *vcpu); |
| int (*handle_addr_err_st)(struct kvm_vcpu *vcpu); |
| int (*handle_addr_err_ld)(struct kvm_vcpu *vcpu); |
| int (*handle_syscall)(struct kvm_vcpu *vcpu); |
| int (*handle_res_inst)(struct kvm_vcpu *vcpu); |
| int (*handle_break)(struct kvm_vcpu *vcpu); |
| int (*handle_trap)(struct kvm_vcpu *vcpu); |
| int (*handle_msa_fpe)(struct kvm_vcpu *vcpu); |
| int (*handle_fpe)(struct kvm_vcpu *vcpu); |
| int (*handle_msa_disabled)(struct kvm_vcpu *vcpu); |
| int (*handle_guest_exit)(struct kvm_vcpu *vcpu); |
| int (*enable_virtualization_cpu)(void); |
| void (*disable_virtualization_cpu)(void); |
| int (*check_extension)(struct kvm *kvm, long ext); |
| int (*vcpu_init)(struct kvm_vcpu *vcpu); |
| void (*vcpu_uninit)(struct kvm_vcpu *vcpu); |
| int (*vcpu_setup)(struct kvm_vcpu *vcpu); |
| void (*prepare_flush_shadow)(struct kvm *kvm); |
| gpa_t (*gva_to_gpa)(gva_t gva); |
| void (*queue_timer_int)(struct kvm_vcpu *vcpu); |
| void (*dequeue_timer_int)(struct kvm_vcpu *vcpu); |
| void (*queue_io_int)(struct kvm_vcpu *vcpu, |
| struct kvm_mips_interrupt *irq); |
| void (*dequeue_io_int)(struct kvm_vcpu *vcpu, |
| struct kvm_mips_interrupt *irq); |
| int (*irq_deliver)(struct kvm_vcpu *vcpu, unsigned int priority, |
| u32 cause); |
| int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority, |
| u32 cause); |
| unsigned long (*num_regs)(struct kvm_vcpu *vcpu); |
| int (*copy_reg_indices)(struct kvm_vcpu *vcpu, u64 __user *indices); |
| int (*get_one_reg)(struct kvm_vcpu *vcpu, |
| const struct kvm_one_reg *reg, s64 *v); |
| int (*set_one_reg)(struct kvm_vcpu *vcpu, |
| const struct kvm_one_reg *reg, s64 v); |
| int (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); |
| int (*vcpu_put)(struct kvm_vcpu *vcpu, int cpu); |
| int (*vcpu_run)(struct kvm_vcpu *vcpu); |
| void (*vcpu_reenter)(struct kvm_vcpu *vcpu); |
| }; |
| extern const struct kvm_mips_callbacks * const kvm_mips_callbacks; |
| int kvm_mips_emulation_init(void); |
| |
| /* Debug: dump vcpu state */ |
| int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu); |
| |
| extern int kvm_mips_handle_exit(struct kvm_vcpu *vcpu); |
| |
| /* Building of entry/exception code */ |
| int kvm_mips_entry_setup(void); |
| void *kvm_mips_build_vcpu_run(void *addr); |
| void *kvm_mips_build_tlb_refill_exception(void *addr, void *handler); |
| void *kvm_mips_build_exception(void *addr, void *handler); |
| void *kvm_mips_build_exit(void *addr); |
| |
| /* FPU/MSA context management */ |
| void __kvm_save_fpu(struct kvm_vcpu_arch *vcpu); |
| void __kvm_restore_fpu(struct kvm_vcpu_arch *vcpu); |
| void __kvm_restore_fcsr(struct kvm_vcpu_arch *vcpu); |
| void __kvm_save_msa(struct kvm_vcpu_arch *vcpu); |
| void __kvm_restore_msa(struct kvm_vcpu_arch *vcpu); |
| void __kvm_restore_msa_upper(struct kvm_vcpu_arch *vcpu); |
| void __kvm_restore_msacsr(struct kvm_vcpu_arch *vcpu); |
| void kvm_own_fpu(struct kvm_vcpu *vcpu); |
| void kvm_own_msa(struct kvm_vcpu *vcpu); |
| void kvm_drop_fpu(struct kvm_vcpu *vcpu); |
| void kvm_lose_fpu(struct kvm_vcpu *vcpu); |
| |
| /* TLB handling */ |
| int kvm_mips_handle_vz_root_tlb_fault(unsigned long badvaddr, |
| struct kvm_vcpu *vcpu, bool write_fault); |
| |
| int kvm_vz_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi); |
| int kvm_vz_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long gva, |
| unsigned long *gpa); |
| void kvm_vz_local_flush_roottlb_all_guests(void); |
| void kvm_vz_local_flush_guesttlb_all(void); |
| void kvm_vz_save_guesttlb(struct kvm_mips_tlb *buf, unsigned int index, |
| unsigned int count); |
| void kvm_vz_load_guesttlb(const struct kvm_mips_tlb *buf, unsigned int index, |
| unsigned int count); |
| #ifdef CONFIG_CPU_LOONGSON64 |
| void kvm_loongson_clear_guest_vtlb(void); |
| void kvm_loongson_clear_guest_ftlb(void); |
| #endif |
| |
| /* MMU handling */ |
| |
| bool kvm_mips_flush_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn); |
| int kvm_mips_mkclean_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn); |
| pgd_t *kvm_pgd_alloc(void); |
| void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu); |
| |
| /* Emulation */ |
| enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause); |
| int kvm_get_badinstr(u32 *opc, struct kvm_vcpu *vcpu, u32 *out); |
| int kvm_get_badinstrp(u32 *opc, struct kvm_vcpu *vcpu, u32 *out); |
| |
| /** |
| * kvm_is_ifetch_fault() - Find whether a TLBL exception is due to ifetch fault. |
| * @vcpu: Virtual CPU. |
| * |
| * Returns: Whether the TLBL exception was likely due to an instruction |
| * fetch fault rather than a data load fault. |
| */ |
| static inline bool kvm_is_ifetch_fault(struct kvm_vcpu_arch *vcpu) |
| { |
| unsigned long badvaddr = vcpu->host_cp0_badvaddr; |
| unsigned long epc = msk_isa16_mode(vcpu->pc); |
| u32 cause = vcpu->host_cp0_cause; |
| |
| if (epc == badvaddr) |
| return true; |
| |
| /* |
| * Branches may be 32-bit or 16-bit instructions. |
| * This isn't exact, but we don't really support MIPS16 or microMIPS yet |
| * in KVM anyway. |
| */ |
| if ((cause & CAUSEF_BD) && badvaddr - epc <= 4) |
| return true; |
| |
| return false; |
| } |
| |
| extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu); |
| |
| u32 kvm_mips_read_count(struct kvm_vcpu *vcpu); |
| void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count); |
| void kvm_mips_write_compare(struct kvm_vcpu *vcpu, u32 compare, bool ack); |
| void kvm_mips_init_count(struct kvm_vcpu *vcpu, unsigned long count_hz); |
| int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl); |
| int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume); |
| int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz); |
| void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu); |
| void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu); |
| enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu); |
| |
| /* fairly internal functions requiring some care to use */ |
| int kvm_mips_count_disabled(struct kvm_vcpu *vcpu); |
| ktime_t kvm_mips_freeze_hrtimer(struct kvm_vcpu *vcpu, u32 *count); |
| int kvm_mips_restore_hrtimer(struct kvm_vcpu *vcpu, ktime_t before, |
| u32 count, int min_drift); |
| |
| void kvm_vz_acquire_htimer(struct kvm_vcpu *vcpu); |
| void kvm_vz_lose_htimer(struct kvm_vcpu *vcpu); |
| |
| enum emulation_result kvm_mips_emulate_store(union mips_instruction inst, |
| u32 cause, |
| struct kvm_vcpu *vcpu); |
| enum emulation_result kvm_mips_emulate_load(union mips_instruction inst, |
| u32 cause, |
| struct kvm_vcpu *vcpu); |
| |
| /* COP0 */ |
| enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu); |
| |
| /* Hypercalls (hypcall.c) */ |
| |
| enum emulation_result kvm_mips_emul_hypcall(struct kvm_vcpu *vcpu, |
| union mips_instruction inst); |
| int kvm_mips_handle_hypcall(struct kvm_vcpu *vcpu); |
| |
| /* Misc */ |
| extern void kvm_mips_dump_stats(struct kvm_vcpu *vcpu); |
| extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm); |
| extern int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
| struct kvm_mips_interrupt *irq); |
| |
| static inline void kvm_arch_sync_events(struct kvm *kvm) {} |
| static inline void kvm_arch_free_memslot(struct kvm *kvm, |
| struct kvm_memory_slot *slot) {} |
| static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {} |
| static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {} |
| static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {} |
| |
| #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS |
| |
| #endif /* __MIPS_KVM_HOST_H__ */ |
