LXR linux/include/kvm/arm_arch

   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
  79bool kvm_timer_is_pending(struct kvm_vcpu *vcpu);
  80
  81u64 kvm_phys_timer_read(void);
  82
  83void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu);
  84void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu);
  85
  86void kvm_timer_init_vhe(void);
  87
  88bool kvm_arch_timer_get_input_level(int vintid);
  89
  90#define vcpu_timer(v)   (&(v)->arch.timer_cpu)
  91#define vcpu_get_timer(v,t)     (&vcpu_timer(v)->timers[(t)])
  92#define vcpu_vtimer(v)  (&(v)->arch.timer_cpu.timers[TIMER_VTIMER])
  93#define vcpu_ptimer(v)  (&(v)->arch.timer_cpu.timers[TIMER_PTIMER])
  94
  95#define arch_timer_ctx_index(ctx)       ((ctx) - vcpu_timer((ctx)->vcpu)->timers)
  96
  97u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu,
  98                              enum kvm_arch_timers tmr,
  99                              enum kvm_arch_timer_regs treg);
 100void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu,
 101                                enum kvm_arch_timers tmr,
 102                                enum kvm_arch_timer_regs treg,
 103                                u64 val);
 104
 105/* Needed for tracing */
 106u32 timer_get_ctl(struct arch_timer_context *ctxt);
 107u64 timer_get_cval(struct arch_timer_context *ctxt);
 108
 109#endif
 110