1 files changed, 107 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..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 <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);
+
+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