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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
#define KVM_HALT_POLL_NS_DEFAULT 500000
/* 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 kvm_pfn_t (*kvm_mips_gfn_to_pfn)(struct kvm *kvm, gfn_t gfn);
extern void (*kvm_mips_release_pfn_clean)(kvm_pfn_t pfn);
extern bool (*kvm_mips_is_error_pfn)(kvm_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_attempted_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
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