/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2019 Western Digital Corporation or its affiliates. * * Authors: * Atish Patra <atish.patra@wdc.com> */ #ifndef __KVM_VCPU_RISCV_TIMER_H #define __KVM_VCPU_RISCV_TIMER_H #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_sync(struct kvm_vcpu *vcpu); void kvm_riscv_vcpu_timer_save(struct kvm_vcpu *vcpu); bool kvm_riscv_vcpu_timer_pending(struct kvm_vcpu *vcpu); #endif