From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- include/kvm/arm_arch_timer.h | 107 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 include/kvm/arm_arch_timer.h (limited to 'include/kvm/arm_arch_timer.h') diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h new file mode 100644 index 000000000..cd6d8f260 --- /dev/null +++ b/include/kvm/arm_arch_timer.h @@ -0,0 +1,107 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2012 ARM Ltd. + * Author: Marc Zyngier + */ + +#ifndef __ASM_ARM_KVM_ARCH_TIMER_H +#define __ASM_ARM_KVM_ARCH_TIMER_H + +#include +#include + +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); + +#endif -- cgit v1.2.3