mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-13 05:54:23 +08:00
466d27e48d
For a number of historical reasons, the KVM/arm64 hotplug setup is pretty complicated, and we have two extra CPUHP notifiers for vGIC and timers. It looks pretty pointless, and gets in the way of further changes. So let's just expose some helpers that can be called from the core CPUHP callback, and get rid of everything else. This gives us the opportunity to drop a useless notifier entry, as well as tidy-up the timer enable/disable, which was a bit odd. Signed-off-by: Marc Zyngier <maz@kernel.org> Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20221130230934.1014142-17-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
112 lines
3.0 KiB
C
112 lines
3.0 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;
|
|
|
|
/* Timer IRQ */
|
|
struct kvm_irq_level irq;
|
|
|
|
/* 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_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
|