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-rw-r--r--arch/mips/include/asm/kvm_host.h1158
1 files changed, 1158 insertions, 0 deletions
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
new file mode 100644
index 000000000..24f3d0f99
--- /dev/null
+++ b/arch/mips/include/asm/kvm_host.h
@@ -0,0 +1,1158 @@
+/*
+* 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>
+
+#include <kvm/iodev.h>
+
+/* MIPS KVM register ids */
+#define MIPS_CP0_32(_R, _S) \
+ (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S)))
+
+#define MIPS_CP0_64(_R, _S) \
+ (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U64 | (8 * (_R) + (_S)))
+
+#define KVM_REG_MIPS_CP0_INDEX MIPS_CP0_32(0, 0)
+#define KVM_REG_MIPS_CP0_ENTRYLO0 MIPS_CP0_64(2, 0)
+#define KVM_REG_MIPS_CP0_ENTRYLO1 MIPS_CP0_64(3, 0)
+#define KVM_REG_MIPS_CP0_CONTEXT MIPS_CP0_64(4, 0)
+#define KVM_REG_MIPS_CP0_CONTEXTCONFIG MIPS_CP0_32(4, 1)
+#define KVM_REG_MIPS_CP0_USERLOCAL MIPS_CP0_64(4, 2)
+#define KVM_REG_MIPS_CP0_XCONTEXTCONFIG MIPS_CP0_64(4, 3)
+#define KVM_REG_MIPS_CP0_PAGEMASK MIPS_CP0_32(5, 0)
+#define KVM_REG_MIPS_CP0_PAGEGRAIN MIPS_CP0_32(5, 1)
+#define KVM_REG_MIPS_CP0_SEGCTL0 MIPS_CP0_64(5, 2)
+#define KVM_REG_MIPS_CP0_SEGCTL1 MIPS_CP0_64(5, 3)
+#define KVM_REG_MIPS_CP0_SEGCTL2 MIPS_CP0_64(5, 4)
+#define KVM_REG_MIPS_CP0_PWBASE MIPS_CP0_64(5, 5)
+#define KVM_REG_MIPS_CP0_PWFIELD MIPS_CP0_64(5, 6)
+#define KVM_REG_MIPS_CP0_PWSIZE MIPS_CP0_64(5, 7)
+#define KVM_REG_MIPS_CP0_WIRED MIPS_CP0_32(6, 0)
+#define KVM_REG_MIPS_CP0_PWCTL MIPS_CP0_32(6, 6)
+#define KVM_REG_MIPS_CP0_HWRENA MIPS_CP0_32(7, 0)
+#define KVM_REG_MIPS_CP0_BADVADDR MIPS_CP0_64(8, 0)
+#define KVM_REG_MIPS_CP0_BADINSTR MIPS_CP0_32(8, 1)
+#define KVM_REG_MIPS_CP0_BADINSTRP MIPS_CP0_32(8, 2)
+#define KVM_REG_MIPS_CP0_COUNT MIPS_CP0_32(9, 0)
+#define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0)
+#define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0)
+#define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0)
+#define KVM_REG_MIPS_CP0_INTCTL MIPS_CP0_32(12, 1)
+#define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0)
+#define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0)
+#define KVM_REG_MIPS_CP0_PRID MIPS_CP0_32(15, 0)
+#define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1)
+#define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0)
+#define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1)
+#define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2)
+#define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3)
+#define KVM_REG_MIPS_CP0_CONFIG4 MIPS_CP0_32(16, 4)
+#define KVM_REG_MIPS_CP0_CONFIG5 MIPS_CP0_32(16, 5)
+#define KVM_REG_MIPS_CP0_CONFIG6 MIPS_CP0_32(16, 6)
+#define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7)
+#define KVM_REG_MIPS_CP0_MAARI MIPS_CP0_64(17, 2)
+#define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0)
+#define KVM_REG_MIPS_CP0_DIAG MIPS_CP0_32(22, 0)
+#define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0)
+#define KVM_REG_MIPS_CP0_KSCRATCH1 MIPS_CP0_64(31, 2)
+#define KVM_REG_MIPS_CP0_KSCRATCH2 MIPS_CP0_64(31, 3)
+#define KVM_REG_MIPS_CP0_KSCRATCH3 MIPS_CP0_64(31, 4)
+#define KVM_REG_MIPS_CP0_KSCRATCH4 MIPS_CP0_64(31, 5)
+#define KVM_REG_MIPS_CP0_KSCRATCH5 MIPS_CP0_64(31, 6)
+#define KVM_REG_MIPS_CP0_KSCRATCH6 MIPS_CP0_64(31, 7)
+
+
+#define KVM_MAX_VCPUS 16
+#define KVM_USER_MEM_SLOTS 16
+/* 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;
+#ifdef CONFIG_CPU_LOONGSON64
+ u64 vz_cpucfg_exits;
+#endif
+#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 */
+};
+
+#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
+
+#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
+
+#define KVM_MIPS_GUEST_TLB_SIZE 64
+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;
+
+ /* 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_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 */
+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_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);
+#ifdef CONFIG_CPU_LOONGSON64
+void kvm_loongson_clear_guest_vtlb(void);
+void kvm_loongson_clear_guest_ftlb(void);
+#endif
+#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, unsigned flags);
+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_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_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_tlbinv_ld(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_tlbmiss_st(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_tlbinv_st(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_tlbmod(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_fpu_exc(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_handle_ri(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_ri_exc(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_bp_exc(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_trap_exc(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_msafpe_exc(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_fpe_exc(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+extern enum emulation_result kvm_mips_emulate_msadis_exc(u32 cause,
+ u32 *opc,
+ struct kvm_vcpu *vcpu);
+
+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);
+
+#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_vcpu *vcpu);
+
+enum emulation_result kvm_mips_emulate_cache(union mips_instruction inst,
+ u32 *opc,
+ u32 cause,
+ struct kvm_vcpu *vcpu);
+enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst,
+ u32 *opc,
+ u32 cause,
+ 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);
+
+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);
+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) {}
+
+#endif /* __MIPS_KVM_HOST_H__ */