113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
|
/* 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_context {
|
||
|
|
struct kvm_vcpu *vcpu;
|
||
|
|
|
||
|
|
/* Registers: control register, timer value */
|
||
|
|
u32 cnt_ctl;
|
||
|
|
u64 cnt_cval;
|
||
|
|
|
||
|
|
/* Timer IRQ */
|
||
|
|
struct kvm_irq_level irq;
|
||
|
|
|
||
|
|
/* Virtual offset */
|
||
|
|
u64 cntvoff;
|
||
|
|
|
||
|
|
/* Emulated Timer (may be unused) */
|
||
|
|
struct hrtimer hrtimer;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 kvm_timer_hyp_init(bool);
|
||
|
|
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_hwstate(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);
|
||
|
|
|
||
|
|
bool kvm_timer_is_pending(struct kvm_vcpu *vcpu);
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
#endif
|