blob: 0d8fdb8ec63aa2cb1b2f2ec4e00d54100bcaa434 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-only */
* Copyright (C) 2019 Western Digital Corporation or its affiliates.
* Authors:
* Atish Patra <>
#include <linux/hrtimer.h>
struct kvm_guest_timer {
/* Mult & Shift values to get nanoseconds from cycles */
u32 nsec_mult;
u32 nsec_shift;
/* Time delta value */
u64 time_delta;
struct kvm_vcpu_timer {
/* Flag for whether init is done */
bool init_done;
/* Flag for whether timer event is configured */
bool next_set;
/* Next timer event cycles */
u64 next_cycles;
/* Underlying hrtimer instance */
struct hrtimer hrt;
/* Flag to check if sstc is enabled or not */
bool sstc_enabled;
/* A function pointer to switch between stimecmp or hrtimer at runtime */
int (*timer_next_event)(struct kvm_vcpu *vcpu, u64 ncycles);
int kvm_riscv_vcpu_timer_next_event(struct kvm_vcpu *vcpu, u64 ncycles);
int kvm_riscv_vcpu_get_reg_timer(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_set_reg_timer(struct kvm_vcpu *vcpu,
const struct kvm_one_reg *reg);
int kvm_riscv_vcpu_timer_init(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_timer_deinit(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_timer_reset(struct kvm_vcpu *vcpu);
void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu);
void kvm_riscv_guest_timer_init(struct kvm *kvm);
void kvm_riscv_vcpu_timer_save(struct kvm_vcpu *vcpu);
bool kvm_riscv_vcpu_timer_pending(struct kvm_vcpu *vcpu);