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-rw-r--r--include/kvm/arm_arch_timer.h109
1 files changed, 109 insertions, 0 deletions
diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h
new file mode 100644
index 000000000..51c193811
--- /dev/null
+++ b/include/kvm/arm_arch_timer.h
@@ -0,0 +1,109 @@
+/* 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);
+
+bool kvm_timer_is_pending(struct kvm_vcpu *vcpu);
+
+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