cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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arm_arch_timer.h (2945B)

      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_H
      8#define __ASM_ARM_KVM_ARCH_TIMER_H
      9
     10#include <linux/clocksource.h>
     11#include <linux/hrtimer.h>
     12
     13enum kvm_arch_timers {
     14	TIMER_PTIMER,
     15	TIMER_VTIMER,
     16	NR_KVM_TIMERS
     17};
     18
     19enum kvm_arch_timer_regs {
     20	TIMER_REG_CNT,
     21	TIMER_REG_CVAL,
     22	TIMER_REG_TVAL,
     23	TIMER_REG_CTL,
     24};
     25
     26struct arch_timer_context {
     27	struct kvm_vcpu			*vcpu;
     28
     29	/* Timer IRQ */
     30	struct kvm_irq_level		irq;
     31
     32	/* Emulated Timer (may be unused) */
     33	struct hrtimer			hrtimer;
     34
     35	/*
     36	 * We have multiple paths which can save/restore the timer state onto
     37	 * the hardware, so we need some way of keeping track of where the
     38	 * latest state is.
     39	 */
     40	bool				loaded;
     41
     42	/* Duplicated state from arch_timer.c for convenience */
     43	u32				host_timer_irq;
     44	u32				host_timer_irq_flags;
     45};
     46
     47struct timer_map {
     48	struct arch_timer_context *direct_vtimer;
     49	struct arch_timer_context *direct_ptimer;
     50	struct arch_timer_context *emul_ptimer;
     51};
     52
     53struct arch_timer_cpu {
     54	struct arch_timer_context timers[NR_KVM_TIMERS];
     55
     56	/* Background timer used when the guest is not running */
     57	struct hrtimer			bg_timer;
     58
     59	/* Is the timer enabled */
     60	bool			enabled;
     61};
     62
     63int kvm_timer_hyp_init(bool);
     64int kvm_timer_enable(struct kvm_vcpu *vcpu);
     65int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
     66void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
     67void kvm_timer_sync_user(struct kvm_vcpu *vcpu);
     68bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu);
     69void kvm_timer_update_run(struct kvm_vcpu *vcpu);
     70void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu);
     71
     72u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
     73int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
     74
     75int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
     76int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
     77int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr);
     78
     79u64 kvm_phys_timer_read(void);
     80
     81void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
     82void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
     83
     84void kvm_timer_init_vhe(void);
     85
     86bool kvm_arch_timer_get_input_level(int vintid);
     87
     88#define vcpu_timer(v)	(&(v)->arch.timer_cpu)
     89#define vcpu_get_timer(v,t)	(&vcpu_timer(v)->timers[(t)])
     90#define vcpu_vtimer(v)	(&(v)->arch.timer_cpu.timers[TIMER_VTIMER])
     91#define vcpu_ptimer(v)	(&(v)->arch.timer_cpu.timers[TIMER_PTIMER])
     92
     93#define arch_timer_ctx_index(ctx)	((ctx) - vcpu_timer((ctx)->vcpu)->timers)
     94
     95u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu,
     96			      enum kvm_arch_timers tmr,
     97			      enum kvm_arch_timer_regs treg);
     98void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu,
     99				enum kvm_arch_timers tmr,
    100				enum kvm_arch_timer_regs treg,
    101				u64 val);
    102
    103/* Needed for tracing */
    104u32 timer_get_ctl(struct arch_timer_context *ctxt);
    105u64 timer_get_cval(struct arch_timer_context *ctxt);
    106
    107#endif