arch/riscv/include/asm/kvm_host.h - linux - Git at Google


            
            /* SPDX-License-Identifier: GPL-2.0-only */

            
            /*

            
             * Copyright (C) 2019 Western Digital Corporation or its affiliates.

            
             *

            
             * Authors:

            
             *     Anup Patel <anup.patel@wdc.com>

            
             */


            #ifndef __RISCV_KVM_HOST_H__

            
            #define __RISCV_KVM_HOST_H__


            #include <linux/types.h>

            
            #include <linux/kvm.h>

            
            #include <linux/kvm_types.h>

            
            #include <linux/spinlock.h>

            
            #include <asm/hwcap.h>

            
            #include <asm/kvm_aia.h>

            
            #include <asm/ptrace.h>

            
            #include <asm/kvm_vcpu_fp.h>

            
            #include <asm/kvm_vcpu_insn.h>

            
            #include <asm/kvm_vcpu_sbi.h>

            
            #include <asm/kvm_vcpu_timer.h>

            
            #include <asm/kvm_vcpu_pmu.h>


            #define KVM_MAX_VCPUS			1024


            #define KVM_HALT_POLL_NS_DEFAULT	500000


            #define KVM_VCPU_MAX_FEATURES		0


            #define KVM_IRQCHIP_NUM_PINS		1024


            #define KVM_REQ_SLEEP \

            
            	KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)

            
            #define KVM_REQ_VCPU_RESET		KVM_ARCH_REQ(1)

            
            #define KVM_REQ_UPDATE_HGATP		KVM_ARCH_REQ(2)

            
            #define KVM_REQ_FENCE_I			\

            
            	KVM_ARCH_REQ_FLAGS(3, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)

            
            #define KVM_REQ_HFENCE_GVMA_VMID_ALL	KVM_REQ_TLB_FLUSH

            
            #define KVM_REQ_HFENCE_VVMA_ALL		\

            
            	KVM_ARCH_REQ_FLAGS(4, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)

            
            #define KVM_REQ_HFENCE			\

            
            	KVM_ARCH_REQ_FLAGS(5, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)

            
            #define KVM_REQ_STEAL_UPDATE		KVM_ARCH_REQ(6)


            #define KVM_HEDELEG_DEFAULT		(BIT(EXC_INST_MISALIGNED) | \

            
            					 BIT(EXC_BREAKPOINT)      | \

            
            					 BIT(EXC_SYSCALL)         | \

            
            					 BIT(EXC_INST_PAGE_FAULT) | \

            
            					 BIT(EXC_LOAD_PAGE_FAULT) | \

            
            					 BIT(EXC_STORE_PAGE_FAULT))


            #define KVM_HIDELEG_DEFAULT		(BIT(IRQ_VS_SOFT)  | \

            
            					 BIT(IRQ_VS_TIMER) | \

            
            					 BIT(IRQ_VS_EXT))


            enum kvm_riscv_hfence_type {

            
            	KVM_RISCV_HFENCE_UNKNOWN = 0,

            
            	KVM_RISCV_HFENCE_GVMA_VMID_GPA,

            
            	KVM_RISCV_HFENCE_VVMA_ASID_GVA,

            
            	KVM_RISCV_HFENCE_VVMA_ASID_ALL,

            
            	KVM_RISCV_HFENCE_VVMA_GVA,

            
            };


            struct kvm_riscv_hfence {

            
            	enum kvm_riscv_hfence_type type;

            
            	unsigned long asid;

            
            	unsigned long order;

            
            	gpa_t addr;

            
            	gpa_t size;

            
            };


            #define KVM_RISCV_VCPU_MAX_HFENCE	64


            struct kvm_vm_stat {

            
            	struct kvm_vm_stat_generic generic;

            
            };


            struct kvm_vcpu_stat {

            
            	struct kvm_vcpu_stat_generic generic;

            
            	u64 ecall_exit_stat;

            
            	u64 wfi_exit_stat;

            
            	u64 wrs_exit_stat;

            
            	u64 mmio_exit_user;

            
            	u64 mmio_exit_kernel;

            
            	u64 csr_exit_user;

            
            	u64 csr_exit_kernel;

            
            	u64 signal_exits;

            
            	u64 exits;

            
            };


            struct kvm_arch_memory_slot {

            
            };


            struct kvm_vmid {

            
            	/*

            
            	 * Writes to vmid_version and vmid happen with vmid_lock held

            
            	 * whereas reads happen without any lock held.

            
            	 */

            
            	unsigned long vmid_version;

            
            	unsigned long vmid;

            
            };


            struct kvm_arch {

            
            	/* G-stage vmid */

            
            	struct kvm_vmid vmid;


            	/* G-stage page table */

            
            	pgd_t *pgd;

            
            	phys_addr_t pgd_phys;


            	/* Guest Timer */

            
            	struct kvm_guest_timer timer;


            	/* AIA Guest/VM context */

            
            	struct kvm_aia aia;

            
            };


            struct kvm_cpu_trap {

            
            	unsigned long sepc;

            
            	unsigned long scause;

            
            	unsigned long stval;

            
            	unsigned long htval;

            
            	unsigned long htinst;

            
            };


            struct kvm_cpu_context {

            
            	unsigned long zero;

            
            	unsigned long ra;

            
            	unsigned long sp;

            
            	unsigned long gp;

            
            	unsigned long tp;

            
            	unsigned long t0;

            
            	unsigned long t1;

            
            	unsigned long t2;

            
            	unsigned long s0;

            
            	unsigned long s1;

            
            	unsigned long a0;

            
            	unsigned long a1;

            
            	unsigned long a2;

            
            	unsigned long a3;

            
            	unsigned long a4;

            
            	unsigned long a5;

            
            	unsigned long a6;

            
            	unsigned long a7;

            
            	unsigned long s2;

            
            	unsigned long s3;

            
            	unsigned long s4;

            
            	unsigned long s5;

            
            	unsigned long s6;

            
            	unsigned long s7;

            
            	unsigned long s8;

            
            	unsigned long s9;

            
            	unsigned long s10;

            
            	unsigned long s11;

            
            	unsigned long t3;

            
            	unsigned long t4;

            
            	unsigned long t5;

            
            	unsigned long t6;

            
            	unsigned long sepc;

            
            	unsigned long sstatus;

            
            	unsigned long hstatus;

            
            	union __riscv_fp_state fp;

            
            	struct __riscv_v_ext_state vector;

            
            };


            struct kvm_vcpu_csr {

            
            	unsigned long vsstatus;

            
            	unsigned long vsie;

            
            	unsigned long vstvec;

            
            	unsigned long vsscratch;

            
            	unsigned long vsepc;

            
            	unsigned long vscause;

            
            	unsigned long vstval;

            
            	unsigned long hvip;

            
            	unsigned long vsatp;

            
            	unsigned long scounteren;

            
            	unsigned long senvcfg;

            
            };


            struct kvm_vcpu_config {

            
            	u64 henvcfg;

            
            	u64 hstateen0;

            
            	unsigned long hedeleg;

            
            };


            struct kvm_vcpu_smstateen_csr {

            
            	unsigned long sstateen0;

            
            };


            struct kvm_vcpu_arch {

            
            	/* VCPU ran at least once */

            
            	bool ran_atleast_once;


            	/* Last Host CPU on which Guest VCPU exited */

            
            	int last_exit_cpu;


            	/* ISA feature bits (similar to MISA) */

            
            	DECLARE_BITMAP(isa, RISCV_ISA_EXT_MAX);


            	/* Vendor, Arch, and Implementation details */

            
            	unsigned long mvendorid;

            
            	unsigned long marchid;

            
            	unsigned long mimpid;


            	/* SSCRATCH, STVEC, and SCOUNTEREN of Host */

            
            	unsigned long host_sscratch;

            
            	unsigned long host_stvec;

            
            	unsigned long host_scounteren;

            
            	unsigned long host_senvcfg;

            
            	unsigned long host_sstateen0;


            	/* CPU context of Host */

            
            	struct kvm_cpu_context host_context;


            	/* CPU context of Guest VCPU */

            
            	struct kvm_cpu_context guest_context;


            	/* CPU CSR context of Guest VCPU */

            
            	struct kvm_vcpu_csr guest_csr;


            	/* CPU Smstateen CSR context of Guest VCPU */

            
            	struct kvm_vcpu_smstateen_csr smstateen_csr;


            	/* CPU context upon Guest VCPU reset */

            
            	struct kvm_cpu_context guest_reset_context;

            
            	spinlock_t reset_cntx_lock;


            	/* CPU CSR context upon Guest VCPU reset */

            
            	struct kvm_vcpu_csr guest_reset_csr;


            	/*

            
            	 * VCPU interrupts

            
            	 *

            
            	 * We have a lockless approach for tracking pending VCPU interrupts

            
            	 * implemented using atomic bitops. The irqs_pending bitmap represent

            
            	 * pending interrupts whereas irqs_pending_mask represent bits changed

            
            	 * in irqs_pending. Our approach is modeled around multiple producer

            
            	 * and single consumer problem where the consumer is the VCPU itself.

            
            	 */

            
            #define KVM_RISCV_VCPU_NR_IRQS	64

            
            	DECLARE_BITMAP(irqs_pending, KVM_RISCV_VCPU_NR_IRQS);

            
            	DECLARE_BITMAP(irqs_pending_mask, KVM_RISCV_VCPU_NR_IRQS);


            	/* VCPU Timer */

            
            	struct kvm_vcpu_timer timer;


            	/* HFENCE request queue */

            
            	spinlock_t hfence_lock;

            
            	unsigned long hfence_head;

            
            	unsigned long hfence_tail;

            
            	struct kvm_riscv_hfence hfence_queue[KVM_RISCV_VCPU_MAX_HFENCE];


            	/* MMIO instruction details */

            
            	struct kvm_mmio_decode mmio_decode;


            	/* CSR instruction details */

            
            	struct kvm_csr_decode csr_decode;


            	/* SBI context */

            
            	struct kvm_vcpu_sbi_context sbi_context;


            	/* AIA VCPU context */

            
            	struct kvm_vcpu_aia aia_context;


            	/* Cache pages needed to program page tables with spinlock held */

            
            	struct kvm_mmu_memory_cache mmu_page_cache;


            	/* VCPU power state */

            
            	struct kvm_mp_state mp_state;

            
            	spinlock_t mp_state_lock;


            	/* Don't run the VCPU (blocked) */

            
            	bool pause;


            	/* Performance monitoring context */

            
            	struct kvm_pmu pmu_context;


            	/* 'static' configurations which are set only once */

            
            	struct kvm_vcpu_config cfg;


            	/* SBI steal-time accounting */

            
            	struct {

            
            		gpa_t shmem;

            
            		u64 last_steal;

            
            	} sta;

            
            };


            static inline void kvm_arch_sync_events(struct kvm *kvm) {}


            #define KVM_RISCV_GSTAGE_TLB_MIN_ORDER		12


            void kvm_riscv_local_hfence_gvma_vmid_gpa(unsigned long vmid,

            
            					  gpa_t gpa, gpa_t gpsz,

            
            					  unsigned long order);

            
            void kvm_riscv_local_hfence_gvma_vmid_all(unsigned long vmid);

            
            void kvm_riscv_local_hfence_gvma_gpa(gpa_t gpa, gpa_t gpsz,

            
            				     unsigned long order);

            
            void kvm_riscv_local_hfence_gvma_all(void);

            
            void kvm_riscv_local_hfence_vvma_asid_gva(unsigned long vmid,

            
            					  unsigned long asid,

            
            					  unsigned long gva,

            
            					  unsigned long gvsz,

            
            					  unsigned long order);

            
            void kvm_riscv_local_hfence_vvma_asid_all(unsigned long vmid,

            
            					  unsigned long asid);

            
            void kvm_riscv_local_hfence_vvma_gva(unsigned long vmid,

            
            				     unsigned long gva, unsigned long gvsz,

            
            				     unsigned long order);

            
            void kvm_riscv_local_hfence_vvma_all(unsigned long vmid);


            void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu);


            void kvm_riscv_fence_i_process(struct kvm_vcpu *vcpu);

            
            void kvm_riscv_hfence_gvma_vmid_all_process(struct kvm_vcpu *vcpu);

            
            void kvm_riscv_hfence_vvma_all_process(struct kvm_vcpu *vcpu);

            
            void kvm_riscv_hfence_process(struct kvm_vcpu *vcpu);


            void kvm_riscv_fence_i(struct kvm *kvm,

            
            		       unsigned long hbase, unsigned long hmask);

            
            void kvm_riscv_hfence_gvma_vmid_gpa(struct kvm *kvm,

            
            				    unsigned long hbase, unsigned long hmask,

            
            				    gpa_t gpa, gpa_t gpsz,

            
            				    unsigned long order);

            
            void kvm_riscv_hfence_gvma_vmid_all(struct kvm *kvm,

            
            				    unsigned long hbase, unsigned long hmask);

            
            void kvm_riscv_hfence_vvma_asid_gva(struct kvm *kvm,

            
            				    unsigned long hbase, unsigned long hmask,

            
            				    unsigned long gva, unsigned long gvsz,

            
            				    unsigned long order, unsigned long asid);

            
            void kvm_riscv_hfence_vvma_asid_all(struct kvm *kvm,

            
            				    unsigned long hbase, unsigned long hmask,

            
            				    unsigned long asid);

            
            void kvm_riscv_hfence_vvma_gva(struct kvm *kvm,

            
            			       unsigned long hbase, unsigned long hmask,

            
            			       unsigned long gva, unsigned long gvsz,

            
            			       unsigned long order);

            
            void kvm_riscv_hfence_vvma_all(struct kvm *kvm,

            
            			       unsigned long hbase, unsigned long hmask);


            int kvm_riscv_gstage_ioremap(struct kvm *kvm, gpa_t gpa,

            
            			     phys_addr_t hpa, unsigned long size,

            
            			     bool writable, bool in_atomic);

            
            void kvm_riscv_gstage_iounmap(struct kvm *kvm, gpa_t gpa,

            
            			      unsigned long size);

            
            int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu,

            
            			 struct kvm_memory_slot *memslot,

            
            			 gpa_t gpa, unsigned long hva, bool is_write);

            
            int kvm_riscv_gstage_alloc_pgd(struct kvm *kvm);

            
            void kvm_riscv_gstage_free_pgd(struct kvm *kvm);

            
            void kvm_riscv_gstage_update_hgatp(struct kvm_vcpu *vcpu);

            
            void __init kvm_riscv_gstage_mode_detect(void);

            
            unsigned long __init kvm_riscv_gstage_mode(void);

            
            int kvm_riscv_gstage_gpa_bits(void);


            void __init kvm_riscv_gstage_vmid_detect(void);

            
            unsigned long kvm_riscv_gstage_vmid_bits(void);

            
            int kvm_riscv_gstage_vmid_init(struct kvm *kvm);

            
            bool kvm_riscv_gstage_vmid_ver_changed(struct kvm_vmid *vmid);

            
            void kvm_riscv_gstage_vmid_update(struct kvm_vcpu *vcpu);


            int kvm_riscv_setup_default_irq_routing(struct kvm *kvm, u32 lines);


            void __kvm_riscv_unpriv_trap(void);


            unsigned long kvm_riscv_vcpu_unpriv_read(struct kvm_vcpu *vcpu,

            
            					 bool read_insn,

            
            					 unsigned long guest_addr,

            
            					 struct kvm_cpu_trap *trap);

            
            void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,

            
            				  struct kvm_cpu_trap *trap);

            
            int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,

            
            			struct kvm_cpu_trap *trap);


            void __kvm_riscv_switch_to(struct kvm_vcpu_arch *vcpu_arch);


            void kvm_riscv_vcpu_setup_isa(struct kvm_vcpu *vcpu);

            
            unsigned long kvm_riscv_vcpu_num_regs(struct kvm_vcpu *vcpu);

            
            int kvm_riscv_vcpu_copy_reg_indices(struct kvm_vcpu *vcpu,

            
            				    u64 __user *uindices);

            
            int kvm_riscv_vcpu_get_reg(struct kvm_vcpu *vcpu,

            
            			   const struct kvm_one_reg *reg);

            
            int kvm_riscv_vcpu_set_reg(struct kvm_vcpu *vcpu,

            
            			   const struct kvm_one_reg *reg);


            int kvm_riscv_vcpu_set_interrupt(struct kvm_vcpu *vcpu, unsigned int irq);

            
            int kvm_riscv_vcpu_unset_interrupt(struct kvm_vcpu *vcpu, unsigned int irq);

            
            void kvm_riscv_vcpu_flush_interrupts(struct kvm_vcpu *vcpu);

            
            void kvm_riscv_vcpu_sync_interrupts(struct kvm_vcpu *vcpu);

            
            bool kvm_riscv_vcpu_has_interrupts(struct kvm_vcpu *vcpu, u64 mask);

            
            void __kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu);

            
            void kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu);

            
            void __kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu);

            
            void kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu);

            
            bool kvm_riscv_vcpu_stopped(struct kvm_vcpu *vcpu);


            void kvm_riscv_vcpu_sbi_sta_reset(struct kvm_vcpu *vcpu);

            
            void kvm_riscv_vcpu_record_steal_time(struct kvm_vcpu *vcpu);


            #endif /* __RISCV_KVM_HOST_H__ */
	/* SPDX-License-Identifier: GPL-2.0-only */
	/*
	* Copyright (C) 2019 Western Digital Corporation or its affiliates.
	*
	* Authors:
	* Anup Patel <anup.patel@wdc.com>
	*/

	#ifndef __RISCV_KVM_HOST_H__
	#define __RISCV_KVM_HOST_H__

	#include <linux/types.h>
	#include <linux/kvm.h>
	#include <linux/kvm_types.h>
	#include <linux/spinlock.h>
	#include <asm/hwcap.h>
	#include <asm/kvm_aia.h>
	#include <asm/ptrace.h>
	#include <asm/kvm_vcpu_fp.h>
	#include <asm/kvm_vcpu_insn.h>
	#include <asm/kvm_vcpu_sbi.h>
	#include <asm/kvm_vcpu_timer.h>
	#include <asm/kvm_vcpu_pmu.h>

	#define KVM_MAX_VCPUS 1024

	#define KVM_HALT_POLL_NS_DEFAULT 500000

	#define KVM_VCPU_MAX_FEATURES 0

	#define KVM_IRQCHIP_NUM_PINS 1024

	#define KVM_REQ_SLEEP \
	KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT \| KVM_REQUEST_NO_WAKEUP)
	#define KVM_REQ_VCPU_RESET KVM_ARCH_REQ(1)
	#define KVM_REQ_UPDATE_HGATP KVM_ARCH_REQ(2)
	#define KVM_REQ_FENCE_I \
	KVM_ARCH_REQ_FLAGS(3, KVM_REQUEST_WAIT \| KVM_REQUEST_NO_WAKEUP)
	#define KVM_REQ_HFENCE_GVMA_VMID_ALL KVM_REQ_TLB_FLUSH
	#define KVM_REQ_HFENCE_VVMA_ALL \
	KVM_ARCH_REQ_FLAGS(4, KVM_REQUEST_WAIT \| KVM_REQUEST_NO_WAKEUP)
	#define KVM_REQ_HFENCE \
	KVM_ARCH_REQ_FLAGS(5, KVM_REQUEST_WAIT \| KVM_REQUEST_NO_WAKEUP)
	#define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(6)

	#define KVM_HEDELEG_DEFAULT (BIT(EXC_INST_MISALIGNED) \| \
	BIT(EXC_BREAKPOINT) \| \
	BIT(EXC_SYSCALL) \| \
	BIT(EXC_INST_PAGE_FAULT) \| \
	BIT(EXC_LOAD_PAGE_FAULT) \| \
	BIT(EXC_STORE_PAGE_FAULT))

	#define KVM_HIDELEG_DEFAULT (BIT(IRQ_VS_SOFT) \| \
	BIT(IRQ_VS_TIMER) \| \
	BIT(IRQ_VS_EXT))

	enum kvm_riscv_hfence_type {
	KVM_RISCV_HFENCE_UNKNOWN = 0,
	KVM_RISCV_HFENCE_GVMA_VMID_GPA,
	KVM_RISCV_HFENCE_VVMA_ASID_GVA,
	KVM_RISCV_HFENCE_VVMA_ASID_ALL,
	KVM_RISCV_HFENCE_VVMA_GVA,
	};

	struct kvm_riscv_hfence {
	enum kvm_riscv_hfence_type type;
	unsigned long asid;
	unsigned long order;
	gpa_t addr;
	gpa_t size;
	};

	#define KVM_RISCV_VCPU_MAX_HFENCE 64

	struct kvm_vm_stat {
	struct kvm_vm_stat_generic generic;
	};

	struct kvm_vcpu_stat {
	struct kvm_vcpu_stat_generic generic;
	u64 ecall_exit_stat;
	u64 wfi_exit_stat;
	u64 wrs_exit_stat;
	u64 mmio_exit_user;
	u64 mmio_exit_kernel;
	u64 csr_exit_user;
	u64 csr_exit_kernel;
	u64 signal_exits;
	u64 exits;
	};

	struct kvm_arch_memory_slot {
	};

	struct kvm_vmid {
	/*
	* Writes to vmid_version and vmid happen with vmid_lock held
	* whereas reads happen without any lock held.
	*/
	unsigned long vmid_version;
	unsigned long vmid;
	};

	struct kvm_arch {
	/* G-stage vmid */
	struct kvm_vmid vmid;

	/* G-stage page table */
	pgd_t *pgd;
	phys_addr_t pgd_phys;

	/* Guest Timer */
	struct kvm_guest_timer timer;

	/* AIA Guest/VM context */
	struct kvm_aia aia;
	};

	struct kvm_cpu_trap {
	unsigned long sepc;
	unsigned long scause;
	unsigned long stval;
	unsigned long htval;
	unsigned long htinst;
	};

	struct kvm_cpu_context {
	unsigned long zero;
	unsigned long ra;
	unsigned long sp;
	unsigned long gp;
	unsigned long tp;
	unsigned long t0;
	unsigned long t1;
	unsigned long t2;
	unsigned long s0;
	unsigned long s1;
	unsigned long a0;
	unsigned long a1;
	unsigned long a2;
	unsigned long a3;
	unsigned long a4;
	unsigned long a5;
	unsigned long a6;
	unsigned long a7;
	unsigned long s2;
	unsigned long s3;
	unsigned long s4;
	unsigned long s5;
	unsigned long s6;
	unsigned long s7;
	unsigned long s8;
	unsigned long s9;
	unsigned long s10;
	unsigned long s11;
	unsigned long t3;
	unsigned long t4;
	unsigned long t5;
	unsigned long t6;
	unsigned long sepc;
	unsigned long sstatus;
	unsigned long hstatus;
	union __riscv_fp_state fp;
	struct __riscv_v_ext_state vector;
	};

	struct kvm_vcpu_csr {
	unsigned long vsstatus;
	unsigned long vsie;
	unsigned long vstvec;
	unsigned long vsscratch;
	unsigned long vsepc;
	unsigned long vscause;
	unsigned long vstval;
	unsigned long hvip;
	unsigned long vsatp;
	unsigned long scounteren;
	unsigned long senvcfg;
	};

	struct kvm_vcpu_config {
	u64 henvcfg;
	u64 hstateen0;
	unsigned long hedeleg;
	};

	struct kvm_vcpu_smstateen_csr {
	unsigned long sstateen0;
	};

	struct kvm_vcpu_arch {
	/* VCPU ran at least once */
	bool ran_atleast_once;

	/* Last Host CPU on which Guest VCPU exited */
	int last_exit_cpu;

	/* ISA feature bits (similar to MISA) */
	DECLARE_BITMAP(isa, RISCV_ISA_EXT_MAX);

	/* Vendor, Arch, and Implementation details */
	unsigned long mvendorid;
	unsigned long marchid;
	unsigned long mimpid;

	/* SSCRATCH, STVEC, and SCOUNTEREN of Host */
	unsigned long host_sscratch;
	unsigned long host_stvec;
	unsigned long host_scounteren;
	unsigned long host_senvcfg;
	unsigned long host_sstateen0;

	/* CPU context of Host */
	struct kvm_cpu_context host_context;

	/* CPU context of Guest VCPU */
	struct kvm_cpu_context guest_context;

	/* CPU CSR context of Guest VCPU */
	struct kvm_vcpu_csr guest_csr;

	/* CPU Smstateen CSR context of Guest VCPU */
	struct kvm_vcpu_smstateen_csr smstateen_csr;

	/* CPU context upon Guest VCPU reset */
	struct kvm_cpu_context guest_reset_context;
	spinlock_t reset_cntx_lock;

	/* CPU CSR context upon Guest VCPU reset */
	struct kvm_vcpu_csr guest_reset_csr;

	/*
	* VCPU interrupts
	*
	* We have a lockless approach for tracking pending VCPU interrupts
	* implemented using atomic bitops. The irqs_pending bitmap represent
	* pending interrupts whereas irqs_pending_mask represent bits changed
	* in irqs_pending. Our approach is modeled around multiple producer
	* and single consumer problem where the consumer is the VCPU itself.
	*/
	#define KVM_RISCV_VCPU_NR_IRQS 64
	DECLARE_BITMAP(irqs_pending, KVM_RISCV_VCPU_NR_IRQS);
	DECLARE_BITMAP(irqs_pending_mask, KVM_RISCV_VCPU_NR_IRQS);

	/* VCPU Timer */
	struct kvm_vcpu_timer timer;

	/* HFENCE request queue */
	spinlock_t hfence_lock;
	unsigned long hfence_head;
	unsigned long hfence_tail;
	struct kvm_riscv_hfence hfence_queue[KVM_RISCV_VCPU_MAX_HFENCE];

	/* MMIO instruction details */
	struct kvm_mmio_decode mmio_decode;

	/* CSR instruction details */
	struct kvm_csr_decode csr_decode;

	/* SBI context */
	struct kvm_vcpu_sbi_context sbi_context;

	/* AIA VCPU context */
	struct kvm_vcpu_aia aia_context;

	/* Cache pages needed to program page tables with spinlock held */
	struct kvm_mmu_memory_cache mmu_page_cache;

	/* VCPU power state */
	struct kvm_mp_state mp_state;
	spinlock_t mp_state_lock;

	/* Don't run the VCPU (blocked) */
	bool pause;

	/* Performance monitoring context */
	struct kvm_pmu pmu_context;

	/* 'static' configurations which are set only once */
	struct kvm_vcpu_config cfg;

	/* SBI steal-time accounting */
	struct {
	gpa_t shmem;
	u64 last_steal;
	} sta;
	};

	static inline void kvm_arch_sync_events(struct kvm *kvm) {}

	#define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12

	void kvm_riscv_local_hfence_gvma_vmid_gpa(unsigned long vmid,
	gpa_t gpa, gpa_t gpsz,
	unsigned long order);
	void kvm_riscv_local_hfence_gvma_vmid_all(unsigned long vmid);
	void kvm_riscv_local_hfence_gvma_gpa(gpa_t gpa, gpa_t gpsz,
	unsigned long order);
	void kvm_riscv_local_hfence_gvma_all(void);
	void kvm_riscv_local_hfence_vvma_asid_gva(unsigned long vmid,
	unsigned long asid,
	unsigned long gva,
	unsigned long gvsz,
	unsigned long order);
	void kvm_riscv_local_hfence_vvma_asid_all(unsigned long vmid,
	unsigned long asid);
	void kvm_riscv_local_hfence_vvma_gva(unsigned long vmid,
	unsigned long gva, unsigned long gvsz,
	unsigned long order);
	void kvm_riscv_local_hfence_vvma_all(unsigned long vmid);

	void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu);

	void kvm_riscv_fence_i_process(struct kvm_vcpu *vcpu);
	void kvm_riscv_hfence_gvma_vmid_all_process(struct kvm_vcpu *vcpu);
	void kvm_riscv_hfence_vvma_all_process(struct kvm_vcpu *vcpu);
	void kvm_riscv_hfence_process(struct kvm_vcpu *vcpu);

	void kvm_riscv_fence_i(struct kvm *kvm,
	unsigned long hbase, unsigned long hmask);
	void kvm_riscv_hfence_gvma_vmid_gpa(struct kvm *kvm,
	unsigned long hbase, unsigned long hmask,
	gpa_t gpa, gpa_t gpsz,
	unsigned long order);
	void kvm_riscv_hfence_gvma_vmid_all(struct kvm *kvm,
	unsigned long hbase, unsigned long hmask);
	void kvm_riscv_hfence_vvma_asid_gva(struct kvm *kvm,
	unsigned long hbase, unsigned long hmask,
	unsigned long gva, unsigned long gvsz,
	unsigned long order, unsigned long asid);
	void kvm_riscv_hfence_vvma_asid_all(struct kvm *kvm,
	unsigned long hbase, unsigned long hmask,
	unsigned long asid);
	void kvm_riscv_hfence_vvma_gva(struct kvm *kvm,
	unsigned long hbase, unsigned long hmask,
	unsigned long gva, unsigned long gvsz,
	unsigned long order);
	void kvm_riscv_hfence_vvma_all(struct kvm *kvm,
	unsigned long hbase, unsigned long hmask);

	int kvm_riscv_gstage_ioremap(struct kvm *kvm, gpa_t gpa,
	phys_addr_t hpa, unsigned long size,
	bool writable, bool in_atomic);
	void kvm_riscv_gstage_iounmap(struct kvm *kvm, gpa_t gpa,
	unsigned long size);
	int kvm_riscv_gstage_map(struct kvm_vcpu *vcpu,
	struct kvm_memory_slot *memslot,
	gpa_t gpa, unsigned long hva, bool is_write);
	int kvm_riscv_gstage_alloc_pgd(struct kvm *kvm);
	void kvm_riscv_gstage_free_pgd(struct kvm *kvm);
	void kvm_riscv_gstage_update_hgatp(struct kvm_vcpu *vcpu);
	void __init kvm_riscv_gstage_mode_detect(void);
	unsigned long __init kvm_riscv_gstage_mode(void);
	int kvm_riscv_gstage_gpa_bits(void);

	void __init kvm_riscv_gstage_vmid_detect(void);
	unsigned long kvm_riscv_gstage_vmid_bits(void);
	int kvm_riscv_gstage_vmid_init(struct kvm *kvm);
	bool kvm_riscv_gstage_vmid_ver_changed(struct kvm_vmid *vmid);
	void kvm_riscv_gstage_vmid_update(struct kvm_vcpu *vcpu);

	int kvm_riscv_setup_default_irq_routing(struct kvm *kvm, u32 lines);

	void __kvm_riscv_unpriv_trap(void);

	unsigned long kvm_riscv_vcpu_unpriv_read(struct kvm_vcpu *vcpu,
	bool read_insn,
	unsigned long guest_addr,
	struct kvm_cpu_trap *trap);
	void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
	struct kvm_cpu_trap *trap);
	int kvm_riscv_vcpu_exit(struct kvm_vcpu vcpu, struct kvm_run run,
	struct kvm_cpu_trap *trap);

	void __kvm_riscv_switch_to(struct kvm_vcpu_arch *vcpu_arch);

	void kvm_riscv_vcpu_setup_isa(struct kvm_vcpu *vcpu);
	unsigned long kvm_riscv_vcpu_num_regs(struct kvm_vcpu *vcpu);
	int kvm_riscv_vcpu_copy_reg_indices(struct kvm_vcpu *vcpu,
	u64 __user *uindices);
	int kvm_riscv_vcpu_get_reg(struct kvm_vcpu *vcpu,
	const struct kvm_one_reg *reg);
	int kvm_riscv_vcpu_set_reg(struct kvm_vcpu *vcpu,
	const struct kvm_one_reg *reg);

	int kvm_riscv_vcpu_set_interrupt(struct kvm_vcpu *vcpu, unsigned int irq);
	int kvm_riscv_vcpu_unset_interrupt(struct kvm_vcpu *vcpu, unsigned int irq);
	void kvm_riscv_vcpu_flush_interrupts(struct kvm_vcpu *vcpu);
	void kvm_riscv_vcpu_sync_interrupts(struct kvm_vcpu *vcpu);
	bool kvm_riscv_vcpu_has_interrupts(struct kvm_vcpu *vcpu, u64 mask);
	void __kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu);
	void kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu);
	void __kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu);
	void kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu);
	bool kvm_riscv_vcpu_stopped(struct kvm_vcpu *vcpu);

	void kvm_riscv_vcpu_sbi_sta_reset(struct kvm_vcpu *vcpu);
	void kvm_riscv_vcpu_record_steal_time(struct kvm_vcpu *vcpu);

	#endif /* __RISCV_KVM_HOST_H__ */