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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (C) 2012 ARM Ltd.4 * Author: Marc Zyngier <marc.zyngier@arm.com>5 */6 7#ifndef __ASM_ARM_KVM_ARCH_TIMER_H8#define __ASM_ARM_KVM_ARCH_TIMER_H9 10#include <linux/clocksource.h>11#include <linux/hrtimer.h>12 13enum kvm_arch_timers {14 TIMER_PTIMER,15 TIMER_VTIMER,16 NR_KVM_EL0_TIMERS,17 TIMER_HVTIMER = NR_KVM_EL0_TIMERS,18 TIMER_HPTIMER,19 NR_KVM_TIMERS20};21 22enum kvm_arch_timer_regs {23 TIMER_REG_CNT,24 TIMER_REG_CVAL,25 TIMER_REG_TVAL,26 TIMER_REG_CTL,27 TIMER_REG_VOFF,28};29 30struct arch_timer_offset {31 /*32 * If set, pointer to one of the offsets in the kvm's offset33 * structure. If NULL, assume a zero offset.34 */35 u64 *vm_offset;36 /*37 * If set, pointer to one of the offsets in the vcpu's sysreg38 * array. If NULL, assume a zero offset.39 */40 u64 *vcpu_offset;41};42 43struct arch_timer_vm_data {44 /* Offset applied to the virtual timer/counter */45 u64 voffset;46 /* Offset applied to the physical timer/counter */47 u64 poffset;48 49 /* The PPI for each timer, global to the VM */50 u8 ppi[NR_KVM_TIMERS];51};52 53struct arch_timer_context {54 struct kvm_vcpu *vcpu;55 56 /* Emulated Timer (may be unused) */57 struct hrtimer hrtimer;58 u64 ns_frac;59 60 /* Offset for this counter/timer */61 struct arch_timer_offset offset;62 /*63 * We have multiple paths which can save/restore the timer state onto64 * the hardware, so we need some way of keeping track of where the65 * latest state is.66 */67 bool loaded;68 69 /* Output level of the timer IRQ */70 struct {71 bool level;72 } irq;73 74 /* Duplicated state from arch_timer.c for convenience */75 u32 host_timer_irq;76};77 78struct timer_map {79 struct arch_timer_context *direct_vtimer;80 struct arch_timer_context *direct_ptimer;81 struct arch_timer_context *emul_vtimer;82 struct arch_timer_context *emul_ptimer;83};84 85void get_timer_map(struct kvm_vcpu *vcpu, struct timer_map *map);86 87struct arch_timer_cpu {88 struct arch_timer_context timers[NR_KVM_TIMERS];89 90 /* Background timer used when the guest is not running */91 struct hrtimer bg_timer;92 93 /* Is the timer enabled */94 bool enabled;95};96 97int __init kvm_timer_hyp_init(bool has_gic);98int kvm_timer_enable(struct kvm_vcpu *vcpu);99void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);100void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);101void kvm_timer_sync_user(struct kvm_vcpu *vcpu);102bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);103void kvm_timer_update_run(struct kvm_vcpu *vcpu);104void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);105 106void kvm_timer_init_vm(struct kvm *kvm);107 108u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);109int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);110 111int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);112int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);113int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);114 115u64 kvm_phys_timer_read(void);116 117void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);118void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);119 120void kvm_timer_init_vhe(void);121 122#define vcpu_timer(v) (&(v)->arch.timer_cpu)123#define vcpu_get_timer(v,t) (&vcpu_timer(v)->timers[(t)])124#define vcpu_vtimer(v) (&(v)->arch.timer_cpu.timers[TIMER_VTIMER])125#define vcpu_ptimer(v) (&(v)->arch.timer_cpu.timers[TIMER_PTIMER])126#define vcpu_hvtimer(v) (&(v)->arch.timer_cpu.timers[TIMER_HVTIMER])127#define vcpu_hptimer(v) (&(v)->arch.timer_cpu.timers[TIMER_HPTIMER])128 129#define arch_timer_ctx_index(ctx) ((ctx) - vcpu_timer((ctx)->vcpu)->timers)130 131#define timer_vm_data(ctx) (&(ctx)->vcpu->kvm->arch.timer_data)132#define timer_irq(ctx) (timer_vm_data(ctx)->ppi[arch_timer_ctx_index(ctx)])133 134u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu,135 enum kvm_arch_timers tmr,136 enum kvm_arch_timer_regs treg);137void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu,138 enum kvm_arch_timers tmr,139 enum kvm_arch_timer_regs treg,140 u64 val);141 142/* Needed for tracing */143u32 timer_get_ctl(struct arch_timer_context *ctxt);144u64 timer_get_cval(struct arch_timer_context *ctxt);145 146/* CPU HP callbacks */147void kvm_timer_cpu_up(void);148void kvm_timer_cpu_down(void);149 150static inline bool has_cntpoff(void)151{152 return (has_vhe() && cpus_have_final_cap(ARM64_HAS_ECV_CNTPOFF));153}154 155#endif156