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linux_dsm_epyc7002/arch/mips/include/asm/kvm_host.h
James Hogan c2537ed9fb MIPS: KVM: Add MSA exception handling 
Add guest exception handling for MIPS SIMD Architecture (MSA) floating
point exceptions and MSA disabled exceptions.

MSA floating point exceptions from the guest need passing to the guest
kernel, so for these a guest MSAFPE is emulated.

MSA disabled exceptions are normally handled by passing a reserved
instruction exception to the guest (because no guest MSA was supported),
but the hypervisor can now handle them if the guest has MSA by passing
an MSA disabled exception to the guest, or if the guest has MSA enabled
by transparently restoring the guest MSA context and enabling MSA and
the FPU.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
2015-03-27 21:25:20 +00:00

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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/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) {}
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__ */
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