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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 ARM Ltd.
* Author: Marc Zyngier <marc.zyngier@arm.com>
*/
#ifndef __ASM_ARM_KVM_ARCH_TIMER_H
#define __ASM_ARM_KVM_ARCH_TIMER_H
#include <linux/clocksource.h>
#include <linux/hrtimer.h>
enum kvm_arch_timers {
TIMER_PTIMER,
TIMER_VTIMER,
NR_KVM_TIMERS
};
enum kvm_arch_timer_regs {
TIMER_REG_CNT,
TIMER_REG_CVAL,
TIMER_REG_TVAL,
TIMER_REG_CTL,
};
struct arch_timer_offset {
/*
* If set, pointer to one of the offsets in the kvm's offset
* structure. If NULL, assume a zero offset.
*/
u64 *vm_offset;
};
struct arch_timer_vm_data {
/* Offset applied to the virtual timer/counter */
u64 voffset;
};
struct arch_timer_context {
struct kvm_vcpu *vcpu;
/* Timer IRQ */
struct kvm_irq_level irq;
/* Emulated Timer (may be unused) */
struct hrtimer hrtimer;
u64 ns_frac;
/* Offset for this counter/timer */
struct arch_timer_offset offset;
/*
* We have multiple paths which can save/restore the timer state onto
* the hardware, so we need some way of keeping track of where the
* latest state is.
*/
bool loaded;
/* Duplicated state from arch_timer.c for convenience */
u32 host_timer_irq;
u32 host_timer_irq_flags;
};
struct timer_map {
struct arch_timer_context *direct_vtimer;
struct arch_timer_context *direct_ptimer;
struct arch_timer_context *emul_ptimer;
};
struct arch_timer_cpu {
struct arch_timer_context timers[NR_KVM_TIMERS];
/* Background timer used when the guest is not running */
struct hrtimer bg_timer;
/* Is the timer enabled */
bool enabled;
};
int __init kvm_timer_hyp_init(bool has_gic);
int kvm_timer_enable(struct kvm_vcpu *vcpu);
int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
void kvm_timer_sync_user(struct kvm_vcpu *vcpu);
bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);
void kvm_timer_update_run(struct kvm_vcpu *vcpu);
void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
u64 kvm_phys_timer_read(void);
void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
void kvm_timer_init_vhe(void);
bool kvm_arch_timer_get_input_level(int vintid);
#define vcpu_timer(v) (&(v)->arch.timer_cpu)
#define vcpu_get_timer(v,t) (&vcpu_timer(v)->timers[(t)])
#define vcpu_vtimer(v) (&(v)->arch.timer_cpu.timers[TIMER_VTIMER])
#define vcpu_ptimer(v) (&(v)->arch.timer_cpu.timers[TIMER_PTIMER])
#define arch_timer_ctx_index(ctx) ((ctx) - vcpu_timer((ctx)->vcpu)->timers)
u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu,
enum kvm_arch_timers tmr,
enum kvm_arch_timer_regs treg);
void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu,
enum kvm_arch_timers tmr,
enum kvm_arch_timer_regs treg,
u64 val);
/* Needed for tracing */
u32 timer_get_ctl(struct arch_timer_context *ctxt);
u64 timer_get_cval(struct arch_timer_context *ctxt);
/* CPU HP callbacks */
void kvm_timer_cpu_up(void);
void kvm_timer_cpu_down(void);
#endif
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