| /* |
| * 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/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> |
| |
| /* 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_USERLOCAL MIPS_CP0_64(4, 2) |
| #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_WIRED MIPS_CP0_32(6, 0) |
| #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_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_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_CONFIG7 MIPS_CP0_32(16, 7) |
| #define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0) |
| #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0) |
| |
| |
| #define KVM_MAX_VCPUS 1 |
| #define KVM_USER_MEM_SLOTS 8 |
| /* memory slots that does not exposed to userspace */ |
| #define KVM_PRIVATE_MEM_SLOTS 0 |
| |
| #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 |
| |
| |
| |
| /* Special address that contains the comm page, used for reducing # of traps */ |
| #define KVM_GUEST_COMMPAGE_ADDR 0x0 |
| |
| #define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \ |
| ((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0)) |
| |
| #define KVM_GUEST_KUSEG 0x00000000UL |
| #define KVM_GUEST_KSEG0 0x40000000UL |
| #define KVM_GUEST_KSEG23 0x60000000UL |
| #define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0x60000000) |
| #define KVM_GUEST_CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff) |
| |
| #define KVM_GUEST_CKSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0) |
| #define KVM_GUEST_CKSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1) |
| #define KVM_GUEST_CKSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23) |
| |
| /* |
| * Map an address to a certain kernel segment |
| */ |
| #define KVM_GUEST_KSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0) |
| #define KVM_GUEST_KSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1) |
| #define KVM_GUEST_KSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23) |
| |
| #define KVM_INVALID_PAGE 0xdeadbeef |
| #define KVM_INVALID_INST 0xdeadbeef |
| #define KVM_INVALID_ADDR 0xdeadbeef |
| |
| #define KVM_MALTA_GUEST_RTC_ADDR 0xb8000070UL |
| |
| #define GUEST_TICKS_PER_JIFFY (40000000/HZ) |
| #define MS_TO_NS(x) (x * 1E6L) |
| |
| #define CAUSEB_DC 27 |
| #define CAUSEF_DC (_ULCAST_(1) << 27) |
| |
| extern atomic_t kvm_mips_instance; |
| extern pfn_t(*kvm_mips_gfn_to_pfn) (struct kvm *kvm, gfn_t gfn); |
| extern void (*kvm_mips_release_pfn_clean) (pfn_t pfn); |
| extern bool(*kvm_mips_is_error_pfn) (pfn_t pfn); |
| |
| struct kvm_vm_stat { |
| u32 remote_tlb_flush; |
| }; |
| |
| struct kvm_vcpu_stat { |
| u32 wait_exits; |
| u32 cache_exits; |
| u32 signal_exits; |
| u32 int_exits; |
| u32 cop_unusable_exits; |
| u32 tlbmod_exits; |
| u32 tlbmiss_ld_exits; |
| u32 tlbmiss_st_exits; |
| u32 addrerr_st_exits; |
| u32 addrerr_ld_exits; |
| u32 syscall_exits; |
| u32 resvd_inst_exits; |
| u32 break_inst_exits; |
| u32 trap_inst_exits; |
| u32 msa_fpe_exits; |
| u32 fpe_exits; |
| u32 msa_disabled_exits; |
| u32 flush_dcache_exits; |
| u32 halt_successful_poll; |
| u32 halt_wakeup; |
| }; |
| |
| enum kvm_mips_exit_types { |
| WAIT_EXITS, |
| CACHE_EXITS, |
| SIGNAL_EXITS, |
| INT_EXITS, |
| COP_UNUSABLE_EXITS, |
| TLBMOD_EXITS, |
| TLBMISS_LD_EXITS, |
| TLBMISS_ST_EXITS, |
| ADDRERR_ST_EXITS, |
| ADDRERR_LD_EXITS, |
| SYSCALL_EXITS, |
| RESVD_INST_EXITS, |
| BREAK_INST_EXITS, |
| TRAP_INST_EXITS, |
| MSA_FPE_EXITS, |
| FPE_EXITS, |
| MSA_DISABLED_EXITS, |
| FLUSH_DCACHE_EXITS, |
| MAX_KVM_MIPS_EXIT_TYPES |
| }; |
| |
| struct kvm_arch_memory_slot { |
| }; |
| |
| struct kvm_arch { |
| /* Guest GVA->HPA page table */ |
| unsigned long *guest_pmap; |
| unsigned long guest_pmap_npages; |
| |
| /* Wired host TLB used for the commpage */ |
| int commpage_tlb; |
| }; |
| |
| #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_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 |
| |
| /* Config0 register bits */ |
| #define CP0C0_M 31 |
| #define CP0C0_K23 28 |
| #define CP0C0_KU 25 |
| #define CP0C0_MDU 20 |
| #define CP0C0_MM 17 |
| #define CP0C0_BM 16 |
| #define CP0C0_BE 15 |
| #define CP0C0_AT 13 |
| #define CP0C0_AR 10 |
| #define CP0C0_MT 7 |
| #define CP0C0_VI 3 |
| #define CP0C0_K0 0 |
| |
| /* Config1 register bits */ |
| #define CP0C1_M 31 |
| #define CP0C1_MMU 25 |
| #define CP0C1_IS 22 |
| #define CP0C1_IL 19 |
| #define CP0C1_IA 16 |
| #define CP0C1_DS 13 |
| #define CP0C1_DL 10 |
| #define CP0C1_DA 7 |
| #define CP0C1_C2 6 |
| #define CP0C1_MD 5 |
| #define CP0C1_PC 4 |
| #define CP0C1_WR 3 |
| #define CP0C1_CA 2 |
| #define CP0C1_EP 1 |
| #define CP0C1_FP 0 |
| |
| /* Config2 Register bits */ |
| #define CP0C2_M 31 |
| #define CP0C2_TU 28 |
| #define CP0C2_TS 24 |
| #define CP0C2_TL 20 |
| #define CP0C2_TA 16 |
| #define CP0C2_SU 12 |
| #define CP0C2_SS 8 |
| #define CP0C2_SL 4 |
| #define CP0C2_SA 0 |
| |
| /* Config3 Register bits */ |
| #define CP0C3_M 31 |
| #define CP0C3_ISA_ON_EXC 16 |
| #define CP0C3_ULRI 13 |
| #define CP0C3_DSPP 10 |
| #define CP0C3_LPA 7 |
| #define CP0C3_VEIC 6 |
| #define CP0C3_VInt 5 |
| #define CP0C3_SP 4 |
| #define CP0C3_MT 2 |
| #define CP0C3_SM 1 |
| #define CP0C3_TL 0 |
| |
| /* MMU types, the first four entries have the same layout as the |
| CP0C0_MT field. */ |
| enum mips_mmu_types { |
| MMU_TYPE_NONE, |
| MMU_TYPE_R4000, |
| MMU_TYPE_RESERVED, |
| MMU_TYPE_FMT, |
| MMU_TYPE_R3000, |
| MMU_TYPE_R6000, |
| MMU_TYPE_R8000 |
| }; |
| |
| /* |
| * Trap codes |
| */ |
| #define T_INT 0 /* Interrupt pending */ |
| #define T_TLB_MOD 1 /* TLB modified fault */ |
| #define T_TLB_LD_MISS 2 /* TLB miss on load or ifetch */ |
| #define T_TLB_ST_MISS 3 /* TLB miss on a store */ |
| #define T_ADDR_ERR_LD 4 /* Address error on a load or ifetch */ |
| #define T_ADDR_ERR_ST 5 /* Address error on a store */ |
| #define T_BUS_ERR_IFETCH 6 /* Bus error on an ifetch */ |
| #define T_BUS_ERR_LD_ST 7 /* Bus error on a load or store */ |
| #define T_SYSCALL 8 /* System call */ |
| #define T_BREAK 9 /* Breakpoint */ |
| #define T_RES_INST 10 /* Reserved instruction exception */ |
| #define T_COP_UNUSABLE 11 /* Coprocessor unusable */ |
| #define T_OVFLOW 12 /* Arithmetic overflow */ |
| |
| /* |
| * Trap definitions added for r4000 port. |
| */ |
| #define T_TRAP 13 /* Trap instruction */ |
| #define T_VCEI 14 /* Virtual coherency exception */ |
| #define T_MSAFPE 14 /* MSA floating point exception */ |
| #define T_FPE 15 /* Floating point exception */ |
| #define T_MSADIS 21 /* MSA disabled exception */ |
| #define T_WATCH 23 /* Watch address reference */ |
| #define T_VCED 31 /* Virtual coherency data */ |
| |
| /* 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, |
| }; |
| |
| #define MIPS3_PG_G 0x00000001 /* Global; ignore ASID if in lo0 & lo1 */ |
| #define MIPS3_PG_V 0x00000002 /* Valid */ |
| #define MIPS3_PG_NV 0x00000000 |
| #define MIPS3_PG_D 0x00000004 /* Dirty */ |
| |
| #define mips3_paddr_to_tlbpfn(x) \ |
| (((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME) |
| #define mips3_tlbpfn_to_paddr(x) \ |
| ((unsigned long)((x) & MIPS3_PG_FRAME) << MIPS3_PG_SHIFT) |
| |
| #define MIPS3_PG_SHIFT 6 |
| #define MIPS3_PG_FRAME 0x3fffffc0 |
| |
| #define VPN2_MASK 0xffffe000 |
| #define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && \ |
| ((x).tlb_lo1 & MIPS3_PG_G)) |
| #define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK) |
| #define TLB_ASID(x) ((x).tlb_hi & ASID_MASK) |
| #define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) \ |
| ? ((x).tlb_lo1 & MIPS3_PG_V) \ |
| : ((x).tlb_lo0 & MIPS3_PG_V)) |
| #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) & ASID_MASK)) |
| |
| struct kvm_mips_tlb { |
| long tlb_mask; |
| long tlb_hi; |
| long tlb_lo0; |
| long tlb_lo1; |
| }; |
| |
| #define KVM_MIPS_FPU_FPU 0x1 |
| #define KVM_MIPS_FPU_MSA 0x2 |
| |
| #define KVM_MIPS_GUEST_TLB_SIZE 64 |
| struct kvm_vcpu_arch { |
| void *host_ebase, *guest_ebase; |
| unsigned long host_stack; |
| unsigned long host_gp; |
| |
| /* Host CP0 registers used when handling exits from guest */ |
| unsigned long host_cp0_badvaddr; |
| unsigned long host_cp0_cause; |
| unsigned long host_cp0_epc; |
| unsigned long host_cp0_entryhi; |
| uint32_t guest_inst; |
| |
| /* GPRS */ |
| unsigned long gprs[32]; |
| unsigned long hi; |
| unsigned long lo; |
| unsigned long pc; |
| |
| /* FPU State */ |
| struct mips_fpu_struct fpu; |
| /* Which FPU state is loaded (KVM_MIPS_FPU_*) */ |
| unsigned int fpu_inuse; |
| |
| /* COP0 State */ |
| struct mips_coproc *cop0; |
| |
| /* Host KSEG0 address of the EI/DI offset */ |
| void *kseg0_commpage; |
| |
| u32 io_gpr; /* GPR used as IO source/target */ |
| |
| struct hrtimer comparecount_timer; |
| /* Count timer control KVM register */ |
| uint32_t count_ctl; |
| /* Count bias from the raw time */ |
| uint32_t count_bias; |
| /* Frequency of timer in Hz */ |
| uint32_t 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; |
| |
| unsigned long pending_load_cause; |
| |
| /* Save/Restore the entryhi register when are are preempted/scheduled back in */ |
| unsigned long preempt_entryhi; |
| |
| /* S/W Based TLB for guest */ |
| struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE]; |
| |
| /* Cached guest kernel/user ASIDs */ |
| uint32_t guest_user_asid[NR_CPUS]; |
| uint32_t guest_kernel_asid[NR_CPUS]; |
| struct mm_struct guest_kernel_mm, guest_user_mm; |
| |
| int last_sched_cpu; |
| |
| /* WAIT executed */ |
| int wait; |
| |
| u8 fpu_enabled; |
| u8 msa_enabled; |
| }; |
| |
| |
| #define kvm_read_c0_guest_index(cop0) (cop0->reg[MIPS_CP0_TLB_INDEX][0]) |
| #define kvm_write_c0_guest_index(cop0, val) (cop0->reg[MIPS_CP0_TLB_INDEX][0] = val) |
| #define kvm_read_c0_guest_entrylo0(cop0) (cop0->reg[MIPS_CP0_TLB_LO0][0]) |
| #define kvm_read_c0_guest_entrylo1(cop0) (cop0->reg[MIPS_CP0_TLB_LO1][0]) |
| #define kvm_read_c0_guest_context(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0]) |
| #define kvm_write_c0_guest_context(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0] = (val)) |
| #define kvm_read_c0_guest_userlocal(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2]) |
| #define kvm_write_c0_guest_userlocal(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2] = (val)) |
| #define kvm_read_c0_guest_pagemask(cop0) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0]) |
| #define kvm_write_c0_guest_pagemask(cop0, val) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0] = (val)) |
| #define kvm_read_c0_guest_wired(cop0) (cop0->reg[MIPS_CP0_TLB_WIRED][0]) |
| #define kvm_write_c0_guest_wired(cop0, val) (cop0->reg[MIPS_CP0_TLB_WIRED][0] = (val)) |
| #define kvm_read_c0_guest_hwrena(cop0) (cop0->reg[MIPS_CP0_HWRENA][0]) |
| #define kvm_write_c0_guest_hwrena(cop0, val) (cop0->reg[MIPS_CP0_HWRENA][0] = (val)) |
| #define kvm_read_c0_guest_badvaddr(cop0) (cop0->reg[MIPS_CP0_BAD_VADDR][0]) |
| #define kvm_write_c0_guest_badvaddr(cop0, val) (cop0->reg[MIPS_CP0_BAD_VADDR][0] = (val)) |
| #define kvm_read_c0_guest_count(cop0) (cop0->reg[MIPS_CP0_COUNT][0]) |
| #define kvm_write_c0_guest_count(cop0, val) (cop0->reg[MIPS_CP0_COUNT][0] = (val)) |
| #define kvm_read_c0_guest_entryhi(cop0) (cop0->reg[MIPS_CP0_TLB_HI][0]) |
| #define kvm_write_c0_guest_entryhi(cop0, val) (cop0->reg[MIPS_CP0_TLB_HI][0] = (val)) |
| #define kvm_read_c0_guest_compare(cop0) (cop0->reg[MIPS_CP0_COMPARE][0]) |
| #define kvm_write_c0_guest_compare(cop0, val) (cop0->reg[MIPS_CP0_COMPARE][0] = (val)) |
| #define kvm_read_c0_guest_status(cop0) (cop0->reg[MIPS_CP0_STATUS][0]) |
| #define kvm_write_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] = (val)) |
| #define kvm_read_c0_guest_intctl(cop0) (cop0->reg[MIPS_CP0_STATUS][1]) |
| #define kvm_write_c0_guest_intctl(cop0, val) (cop0->reg[MIPS_CP0_STATUS][1] = (val)) |
| #define kvm_read_c0_guest_cause(cop0) (cop0->reg[MIPS_CP0_CAUSE][0]) |
| #define kvm_write_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] = (val)) |
| #define kvm_read_c0_guest_epc(cop0) (cop0->reg[MIPS_CP0_EXC_PC][0]) |
| #define kvm_write_c0_guest_epc(cop0, val) (cop0->reg[MIPS_CP0_EXC_PC][0] = (val)) |
| #define kvm_read_c0_guest_prid(cop0) (cop0->reg[MIPS_CP0_PRID][0]) |
| #define kvm_write_c0_guest_prid(cop0, val) (cop0->reg[MIPS_CP0_PRID][0] = (val)) |
| #define kvm_read_c0_guest_ebase(cop0) (cop0->reg[MIPS_CP0_PRID][1]) |
| #define kvm_write_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] = (val)) |
| #define kvm_read_c0_guest_config(cop0) (cop0->reg[MIPS_CP0_CONFIG][0]) |
| #define kvm_read_c0_guest_config1(cop0) (cop0->reg[MIPS_CP0_CONFIG][1]) |
| #define kvm_read_c0_guest_config2(cop0) (cop0->reg[MIPS_CP0_CONFIG][2]) |
| #define kvm_read_c0_guest_config3(cop0) (cop0->reg[MIPS_CP0_CONFIG][3]) |
| #define kvm_read_c0_guest_config4(cop0) (cop0->reg[MIPS_CP0_CONFIG][4]) |
| #define kvm_read_c0_guest_config5(cop0) (cop0->reg[MIPS_CP0_CONFIG][5]) |
| #define kvm_read_c0_guest_config7(cop0) (cop0->reg[MIPS_CP0_CONFIG][7]) |
| #define kvm_write_c0_guest_config(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][0] = (val)) |
| #define kvm_write_c0_guest_config1(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][1] = (val)) |
| #define kvm_write_c0_guest_config2(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][2] = (val)) |
| #define kvm_write_c0_guest_config3(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][3] = (val)) |
| #define kvm_write_c0_guest_config4(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][4] = (val)) |
| #define kvm_write_c0_guest_config5(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][5] = (val)) |
| #define kvm_write_c0_guest_config7(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][7] = (val)) |
| #define kvm_read_c0_guest_errorepc(cop0) (cop0->reg[MIPS_CP0_ERROR_PC][0]) |
| #define kvm_write_c0_guest_errorepc(cop0, val) (cop0->reg[MIPS_CP0_ERROR_PC][0] = (val)) |
| |
| /* |
| * Some of the guest registers may be modified asynchronously (e.g. from a |
| * hrtimer callback in hard irq context) and therefore need stronger atomicity |
| * guarantees than other registers. |
| */ |
| |
| static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg, |
| unsigned long val) |
| { |
| unsigned long temp; |
| do { |
| __asm__ __volatile__( |
| " .set mips3 \n" |
| " " __LL "%0, %1 \n" |
| " or %0, %2 \n" |
| " " __SC "%0, %1 \n" |
| " .set mips0 \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 mips3 \n" |
| " " __LL "%0, %1 \n" |
| " and %0, %2 \n" |
| " " __SC "%0, %1 \n" |
| " .set mips0 \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 mips3 \n" |
| " " __LL "%0, %1 \n" |
| " and %0, %2 \n" |
| " or %0, %3 \n" |
| " " __SC "%0, %1 \n" |
| " .set mips0 \n" |
| : "=&r" (temp), "+m" (*reg) |
| : "r" (~change), "r" (val & change)); |
| } while (unlikely(!temp)); |
| } |
| |
| #define kvm_set_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] |= (val)) |
| #define kvm_clear_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] &= ~(val)) |
| |
| /* Cause can be modified asynchronously from hardirq hrtimer callback */ |
| #define kvm_set_c0_guest_cause(cop0, val) \ |
| _kvm_atomic_set_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val) |
| #define kvm_clear_c0_guest_cause(cop0, val) \ |
| _kvm_atomic_clear_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val) |
| #define kvm_change_c0_guest_cause(cop0, change, val) \ |
| _kvm_atomic_change_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], \ |
| change, val) |
| |
| #define kvm_set_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] |= (val)) |
| #define kvm_clear_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] &= ~(val)) |
| #define kvm_change_c0_guest_ebase(cop0, change, val) \ |
| { \ |
| kvm_clear_c0_guest_ebase(cop0, change); \ |
| kvm_set_c0_guest_ebase(cop0, ((val) & (change))); \ |
| } |
| |
| /* Helpers */ |
| |
| static inline bool kvm_mips_guest_can_have_fpu(struct kvm_vcpu_arch *vcpu) |
| { |
| return (!__builtin_constant_p(cpu_has_fpu) || 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 (*vm_init)(struct kvm *kvm); |
| int (*vcpu_init)(struct kvm_vcpu *vcpu); |
| int (*vcpu_setup)(struct kvm_vcpu *vcpu); |
| 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, |
| uint32_t cause); |
| int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority, |
| uint32_t cause); |
| 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_get_regs)(struct kvm_vcpu *vcpu); |
| int (*vcpu_set_regs)(struct kvm_vcpu *vcpu); |
| }; |
| extern struct kvm_mips_callbacks *kvm_mips_callbacks; |
| int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks); |
| |
| /* Debug: dump vcpu state */ |
| int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu); |
| |
| /* Trampoline ASM routine to start running in "Guest" context */ |
| extern int __kvm_mips_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu); |
| |
| /* 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 */ |
| uint32_t kvm_get_kernel_asid(struct kvm_vcpu *vcpu); |
| |
| uint32_t kvm_get_user_asid(struct kvm_vcpu *vcpu); |
| |
| uint32_t kvm_get_commpage_asid (struct kvm_vcpu *vcpu); |
| |
| extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr, |
| struct kvm_vcpu *vcpu); |
| |
| extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, |
| struct kvm_vcpu *vcpu); |
| |
| extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, |
| struct kvm_mips_tlb *tlb, |
| unsigned long *hpa0, |
| unsigned long *hpa1); |
| |
| extern enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern void kvm_mips_dump_host_tlbs(void); |
| extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu); |
| extern void kvm_mips_flush_host_tlb(int skip_kseg0); |
| extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi); |
| extern int kvm_mips_host_tlb_inv_index(struct kvm_vcpu *vcpu, int index); |
| |
| extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, |
| unsigned long entryhi); |
| extern int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr); |
| extern unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu, |
| unsigned long gva); |
| extern void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu, |
| struct kvm_vcpu *vcpu); |
| extern void kvm_local_flush_tlb_all(void); |
| extern void kvm_mips_alloc_new_mmu_context(struct kvm_vcpu *vcpu); |
| extern void kvm_mips_vcpu_load(struct kvm_vcpu *vcpu, int cpu); |
| extern void kvm_mips_vcpu_put(struct kvm_vcpu *vcpu); |
| |
| /* Emulation */ |
| uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu); |
| enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause); |
| |
| extern enum emulation_result kvm_mips_emulate_inst(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_syscall(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_handle_ri(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_trap_exc(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_msafpe_exc(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_fpe_exc(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_emulate_msadis_exc(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, |
| struct kvm_run *run); |
| |
| uint32_t kvm_mips_read_count(struct kvm_vcpu *vcpu); |
| void kvm_mips_write_count(struct kvm_vcpu *vcpu, uint32_t count); |
| void kvm_mips_write_compare(struct kvm_vcpu *vcpu, uint32_t compare); |
| void kvm_mips_init_count(struct kvm_vcpu *vcpu); |
| 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); |
| |
| enum emulation_result kvm_mips_check_privilege(unsigned long cause, |
| uint32_t *opc, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| enum emulation_result kvm_mips_emulate_cache(uint32_t inst, |
| uint32_t *opc, |
| uint32_t cause, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, |
| uint32_t *opc, |
| uint32_t cause, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| enum emulation_result kvm_mips_emulate_store(uint32_t inst, |
| uint32_t cause, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| enum emulation_result kvm_mips_emulate_load(uint32_t inst, |
| uint32_t cause, |
| struct kvm_run *run, |
| struct kvm_vcpu *vcpu); |
| |
| unsigned int kvm_mips_config1_wrmask(struct kvm_vcpu *vcpu); |
| unsigned int kvm_mips_config3_wrmask(struct kvm_vcpu *vcpu); |
| unsigned int kvm_mips_config4_wrmask(struct kvm_vcpu *vcpu); |
| unsigned int kvm_mips_config5_wrmask(struct kvm_vcpu *vcpu); |
| |
| /* Dynamic binary translation */ |
| extern int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc, |
| struct kvm_vcpu *vcpu); |
| extern int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc, |
| struct kvm_vcpu *vcpu); |
| extern int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, |
| struct kvm_vcpu *vcpu); |
| extern int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, |
| 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); |
| |
| static inline void kvm_arch_hardware_disable(void) {} |
| static inline void kvm_arch_hardware_unsetup(void) {} |
| static inline void kvm_arch_sync_events(struct kvm *kvm) {} |
| static inline void kvm_arch_free_memslot(struct kvm *kvm, |
| struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {} |
| static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {} |
| static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {} |
| static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
| struct kvm_memory_slot *slot) {} |
| static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} |
| static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} |
| |
| #endif /* __MIPS_KVM_HOST_H__ */ |
