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linux-stable/arch/mips/include/asm/kvm_host.h
Sean Christopherson 152482580a KVM: Call kvm_arch_memslots_updated() before updating memslots 
kvm_arch_memslots_updated() is at this point in time an x86-specific
hook for handling MMIO generation wraparound.  x86 stashes 19 bits of
the memslots generation number in its MMIO sptes in order to avoid
full page fault walks for repeat faults on emulated MMIO addresses.
Because only 19 bits are used, wrapping the MMIO generation number is
possible, if unlikely.  kvm_arch_memslots_updated() alerts x86 that
the generation has changed so that it can invalidate all MMIO sptes in
case the effective MMIO generation has wrapped so as to avoid using a
stale spte, e.g. a (very) old spte that was created with generation==0.

Given that the purpose of kvm_arch_memslots_updated() is to prevent
consuming stale entries, it needs to be called before the new generation
is propagated to memslots.  Invalidating the MMIO sptes after updating
memslots means that there is a window where a vCPU could dereference
the new memslots generation, e.g. 0, and incorrectly reuse an old MMIO
spte that was created with (pre-wrap) generation==0.

Fixes: e59dbe09f8 ("KVM: Introduce kvm_arch_memslots_updated()")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-02-20 22:48:32 +01:00

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/*
* 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/inst.h>
#include <asm/mipsregs.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_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_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 8
#define KVM_USER_MEM_SLOTS 8
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 0
#define KVM_HALT_POLL_NS_DEFAULT 500000
#ifdef CONFIG_KVM_MIPS_VZ
extern unsigned long GUESTID_MASK;
extern unsigned long GUESTID_FIRST_VERSION;
extern unsigned long GUESTID_VERSION_MASK;
#endif
/*
* Special address that contains the comm page, used for reducing # of traps
* This needs to be within 32Kb of 0x0 (so the zero register can be used), but
* preferably not at 0x0 so that most kernel NULL pointer dereferences can be
* caught.
*/
#define KVM_GUEST_COMMPAGE_ADDR ((PAGE_SIZE > 0x8000) ? 0 : \
(0x8000 - PAGE_SIZE))
#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_KSEG1 0x40000000UL
#define KVM_GUEST_KSEG23 0x60000000UL
#define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0xe0000000)
#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_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 {
ulong remote_tlb_flush;
};
struct kvm_vcpu_stat {
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;
#ifdef CONFIG_KVM_MIPS_VZ
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;
#endif
u64 halt_successful_poll;
u64 halt_attempted_poll;
u64 halt_poll_invalid;
u64 halt_wakeup;
};
struct kvm_arch_memory_slot {
};
struct kvm_arch {
/* Guest physical mm */
struct mm_struct gpa_mm;
/* Mask of CPUs needing GPA ASID flush */
cpumask_t asid_flush_mask;
};
#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
#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 */
};
#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 KVM_ENTRYHI_ASID MIPS_ENTRYHI_ASID
#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_NR_MEM_OBJS 4
/*
* We don't want allocation failures within the mmu code, so we preallocate
* enough memory for a single page fault in a cache.
*/
struct kvm_mmu_memory_cache {
int nobjs;
void *objects[KVM_NR_MEM_OBJS];
};
#define KVM_MIPS_AUX_FPU 0x1
#define KVM_MIPS_AUX_MSA 0x2
#define KVM_MIPS_GUEST_TLB_SIZE 64
struct kvm_vcpu_arch {
void *guest_ebase;
int (*vcpu_run)(struct kvm_run *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;
/* Host KSEG0 address of the EI/DI offset */
void *kseg0_commpage;
/* 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;
/* S/W Based TLB for guest */
struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE];
/* Guest kernel/user [partial] mm */
struct mm_struct guest_kernel_mm, guest_user_mm;
/* Guest ASID of last user mode execution */
unsigned int last_user_gasid;
/* Cache some mmu pages needed inside spinlock regions */
struct kvm_mmu_memory_cache mmu_page_cache;
#ifdef CONFIG_KVM_MIPS_VZ
/* 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];
#endif
/* 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"
" " __LL "%0, %1 \n"
" or %0, %2 \n"
" " __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"
" " __LL "%0, %1 \n"
" and %0, %2 \n"
" " __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"
" " __LL "%0, %1 \n"
" and %0, %2 \n"
" or %0, %3 \n"
" " __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)
#ifndef CONFIG_KVM_MIPS_VZ
/*
* T&E (trap & emulate software based virtualisation)
* We generate the common accessors operating exclusively on the saved context
* in RAM.
*/
#define __BUILD_KVM_RW_HW __BUILD_KVM_RW_SW
#define __BUILD_KVM_SET_HW __BUILD_KVM_SET_SW
#define __BUILD_KVM_ATOMIC_HW __BUILD_KVM_ATOMIC_SW
#else
/*
* 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
#endif
/*
* 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 (*hardware_enable)(void);
void (*hardware_disable)(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 (*flush_shadow_all)(struct kvm *kvm);
/*
* Must take care of flushing any cached GPA PTEs (e.g. guest entries in
* VZ root TLB, or T&E GVA page tables and corresponding root TLB
* mappings).
*/
void (*flush_shadow_memslot)(struct kvm *kvm,
const struct kvm_memory_slot *slot);
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_run *run, struct kvm_vcpu *vcpu);
void (*vcpu_reenter)(struct kvm_run *run, 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);
extern int kvm_mips_handle_exit(struct kvm_run *run, 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 */
u32 kvm_get_kernel_asid(struct kvm_vcpu *vcpu);
u32 kvm_get_user_asid(struct kvm_vcpu *vcpu);
u32 kvm_get_commpage_asid (struct kvm_vcpu *vcpu);
#ifdef CONFIG_KVM_MIPS_VZ
int kvm_mips_handle_vz_root_tlb_fault(unsigned long badvaddr,
struct kvm_vcpu *vcpu, bool write_fault);
#endif
extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr,
struct kvm_vcpu *vcpu,
bool write_fault);
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 gva,
bool write_fault);
extern enum emulation_result kvm_mips_handle_tlbmiss(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu,
bool write_fault);
extern void kvm_mips_dump_host_tlbs(void);
extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu);
extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi,
bool user, bool kernel);
extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu,
unsigned long entryhi);
#ifdef CONFIG_KVM_MIPS_VZ
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);
#endif
void kvm_mips_suspend_mm(int cpu);
void kvm_mips_resume_mm(int cpu);
/* MMU handling */
/**
* enum kvm_mips_flush - Types of MMU flushes.
* @KMF_USER: Flush guest user virtual memory mappings.
* Guest USeg only.
* @KMF_KERN: Flush guest kernel virtual memory mappings.
* Guest USeg and KSeg2/3.
* @KMF_GPA: Flush guest physical memory mappings.
* Also includes KSeg0 if KMF_KERN is set.
*/
enum kvm_mips_flush {
KMF_USER = 0x0,
KMF_KERN = 0x1,
KMF_GPA = 0x2,
};
void kvm_mips_flush_gva_pt(pgd_t *pgd, enum kvm_mips_flush flags);
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);
void kvm_trap_emul_invalidate_gva(struct kvm_vcpu *vcpu, unsigned long addr,
bool user);
void kvm_trap_emul_gva_lockless_begin(struct kvm_vcpu *vcpu);
void kvm_trap_emul_gva_lockless_end(struct kvm_vcpu *vcpu);
enum kvm_mips_fault_result {
KVM_MIPS_MAPPED = 0,
KVM_MIPS_GVA,
KVM_MIPS_GPA,
KVM_MIPS_TLB,
KVM_MIPS_TLBINV,
KVM_MIPS_TLBMOD,
};
enum kvm_mips_fault_result kvm_trap_emul_gva_fault(struct kvm_vcpu *vcpu,
unsigned long gva,
bool write);
#define KVM_ARCH_WANT_MMU_NOTIFIER
int kvm_unmap_hva_range(struct kvm *kvm,
unsigned long start, unsigned long end);
int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
/* Emulation */
int kvm_get_inst(u32 *opc, struct kvm_vcpu *vcpu, u32 *out);
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_emulate_inst(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
long kvm_mips_guest_exception_base(struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_syscall(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbinv_ld(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbmiss_st(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbinv_st(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_tlbmod(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_fpu_exc(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_handle_ri(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_ri_exc(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_bp_exc(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_trap_exc(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_msafpe_exc(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_fpe_exc(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
extern enum emulation_result kvm_mips_emulate_msadis_exc(u32 cause,
u32 *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);
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);
#ifdef CONFIG_KVM_MIPS_VZ
void kvm_vz_acquire_htimer(struct kvm_vcpu *vcpu);
void kvm_vz_lose_htimer(struct kvm_vcpu *vcpu);
#else
static inline void kvm_vz_acquire_htimer(struct kvm_vcpu *vcpu) {}
static inline void kvm_vz_lose_htimer(struct kvm_vcpu *vcpu) {}
#endif
enum emulation_result kvm_mips_check_privilege(u32 cause,
u32 *opc,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_cache(union mips_instruction inst,
u32 *opc,
u32 cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst,
u32 *opc,
u32 cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_store(union mips_instruction inst,
u32 cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
enum emulation_result kvm_mips_emulate_load(union mips_instruction inst,
u32 cause,
struct kvm_run *run,
struct kvm_vcpu *vcpu);
/* COP0 */
enum emulation_result kvm_mips_emul_wait(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);
/* 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);
/* Dynamic binary translation */
extern int kvm_mips_trans_cache_index(union mips_instruction inst,
u32 *opc, struct kvm_vcpu *vcpu);
extern int kvm_mips_trans_cache_va(union mips_instruction inst, u32 *opc,
struct kvm_vcpu *vcpu);
extern int kvm_mips_trans_mfc0(union mips_instruction inst, u32 *opc,
struct kvm_vcpu *vcpu);
extern int kvm_mips_trans_mtc0(union mips_instruction inst, u32 *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_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, u64 gen) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
#endif /* __MIPS_KVM_HOST_H__ */
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