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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 <[email protected]>
*/
#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>
#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
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 0
#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 {
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;
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
u64 halt_successful_poll;
u64 halt_attempted_poll;
u64 halt_poll_success_ns;
u64 halt_poll_fail_ns;
u64 halt_poll_invalid;
u64 halt_wakeup;
};
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"
" " __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)
/*
* 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 (*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 (*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 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_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);
#define KVM_ARCH_WANT_MMU_NOTIFIER
/* 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_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 *slot) {}
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) {}
#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB
int kvm_arch_flush_remote_tlb(struct kvm *kvm);
#endif /* __MIPS_KVM_HOST_H__ */
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