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 13 enum kvm_arch_timers { 14 TIMER_PTIMER, 15 TIMER_VTIMER, 16 NR_KVM_TIMERS 17 }; 18 19 enum kvm_arch_timer_regs { 20 TIMER_REG_CNT, 21 TIMER_REG_CVAL, 22 TIMER_REG_TVAL, 23 TIMER_REG_CTL, 24 }; 25 26 struct 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 47 struct 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 53 struct 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 63 int kvm_timer_hyp_init(bool); 64 int kvm_timer_enable(struct kvm_vcpu *vcpu); 65 int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu); 66 void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); 67 void kvm_timer_sync_user(struct kvm_vcpu *vcpu); 68 bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu); 69 void kvm_timer_update_run(struct kvm_vcpu *vcpu); 70 void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu); 71 72 u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid); 73 int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value); 74 75 int kvm_arm_timer_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); 76 int kvm_arm_timer_get_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); 77 int kvm_arm_timer_has_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr); 78 79 bool kvm_timer_is_pending(struct kvm_vcpu *vcpu); 80 81 u64 kvm_phys_timer_read(void); 82 83 void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu); 84 void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu); 85 86 void kvm_timer_init_vhe(void); 87 88 bool 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 97 u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu, 98 enum kvm_arch_timers tmr, 99 enum kvm_arch_timer_regs treg); 100 void 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 */ 106 u32 timer_get_ctl(struct arch_timer_context *ctxt); 107 u64 timer_get_cval(struct arch_timer_context *ctxt); 108 109 #endif 110