1 files changed, 85 insertions, 28 deletions

diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 95cba0799828..2e43f9d42bd5 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -27,6 +27,8 @@
 #include <linux/mman.h>
 #include <linux/sched.h>
 #include <linux/kvm.h>
+#include <linux/kvm_irqfd.h>
+#include <linux/irqbypass.h>
 #include <trace/events/kvm.h>
 #include <kvm/arm_pmu.h>
 
@@ -175,6 +177,8 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
 {
 	int i;
 
+	kvm_vgic_destroy(kvm);
+
 	free_percpu(kvm->arch.last_vcpu_ran);
 	kvm->arch.last_vcpu_ran = NULL;
 
@@ -184,8 +188,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
 			kvm->vcpus[i] = NULL;
 		}
 	}
-
-	kvm_vgic_destroy(kvm);
+	atomic_set(&kvm->online_vcpus, 0);
 }
 
 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
@@ -294,7 +297,6 @@ void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 {
 	kvm_mmu_free_memory_caches(vcpu);
 	kvm_timer_vcpu_terminate(vcpu);
-	kvm_vgic_vcpu_destroy(vcpu);
 	kvm_pmu_vcpu_destroy(vcpu);
 	kvm_vcpu_uninit(vcpu);
 	kmem_cache_free(kvm_vcpu_cache, vcpu);
@@ -307,18 +309,19 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 {
-	return kvm_timer_should_fire(vcpu_vtimer(vcpu)) ||
-	       kvm_timer_should_fire(vcpu_ptimer(vcpu));
+	return kvm_timer_is_pending(vcpu);
 }
 
 void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
 {
 	kvm_timer_schedule(vcpu);
+	kvm_vgic_v4_enable_doorbell(vcpu);
 }
 
 void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
 {
 	kvm_timer_unschedule(vcpu);
+	kvm_vgic_v4_disable_doorbell(vcpu);
 }
 
 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
@@ -354,18 +357,18 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 	vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state);
 
 	kvm_arm_set_running_vcpu(vcpu);
-
 	kvm_vgic_load(vcpu);
+	kvm_timer_vcpu_load(vcpu);
 }
 
 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 {
+	kvm_timer_vcpu_put(vcpu);
 	kvm_vgic_put(vcpu);
 
 	vcpu->cpu = -1;
 
 	kvm_arm_set_running_vcpu(NULL);
-	kvm_timer_vcpu_put(vcpu);
 }
 
 static void vcpu_power_off(struct kvm_vcpu *vcpu)
@@ -612,7 +615,6 @@ static void check_vcpu_requests(struct kvm_vcpu *vcpu)
 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 {
 	int ret;
-	sigset_t sigsaved;
 
 	if (unlikely(!kvm_vcpu_initialized(vcpu)))
 		return -ENOEXEC;
@@ -625,13 +627,15 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		ret = kvm_handle_mmio_return(vcpu, vcpu->run);
 		if (ret)
 			return ret;
+		if (kvm_arm_handle_step_debug(vcpu, vcpu->run))
+			return 0;
+
 	}
 
 	if (run->immediate_exit)
 		return -EINTR;
 
-	if (vcpu->sigset_active)
-		sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
+	kvm_sigset_activate(vcpu);
 
 	ret = 1;
 	run->exit_reason = KVM_EXIT_UNKNOWN;
@@ -652,13 +656,15 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		 */
 		preempt_disable();
 
-		kvm_pmu_flush_hwstate(vcpu);
+		/* Flush FP/SIMD state that can't survive guest entry/exit */
+		kvm_fpsimd_flush_cpu_state();
 
-		kvm_timer_flush_hwstate(vcpu);
-		kvm_vgic_flush_hwstate(vcpu);
+		kvm_pmu_flush_hwstate(vcpu);
 
 		local_irq_disable();
 
+		kvm_vgic_flush_hwstate(vcpu);
+
 		/*
 		 * If we have a singal pending, or need to notify a userspace
 		 * irqchip about timer or PMU level changes, then we exit (and
@@ -683,10 +689,10 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		if (ret <= 0 || need_new_vmid_gen(vcpu->kvm) ||
 		    kvm_request_pending(vcpu)) {
 			vcpu->mode = OUTSIDE_GUEST_MODE;
-			local_irq_enable();
 			kvm_pmu_sync_hwstate(vcpu);
 			kvm_timer_sync_hwstate(vcpu);
 			kvm_vgic_sync_hwstate(vcpu);
+			local_irq_enable();
 			preempt_enable();
 			continue;
 		}
@@ -710,6 +716,27 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		kvm_arm_clear_debug(vcpu);
 
 		/*
+		 * We must sync the PMU state before the vgic state so
+		 * that the vgic can properly sample the updated state of the
+		 * interrupt line.
+		 */
+		kvm_pmu_sync_hwstate(vcpu);
+
+		/*
+		 * Sync the vgic state before syncing the timer state because
+		 * the timer code needs to know if the virtual timer
+		 * interrupts are active.
+		 */
+		kvm_vgic_sync_hwstate(vcpu);
+
+		/*
+		 * Sync the timer hardware state before enabling interrupts as
+		 * we don't want vtimer interrupts to race with syncing the
+		 * timer virtual interrupt state.
+		 */
+		kvm_timer_sync_hwstate(vcpu);
+
+		/*
 		 * We may have taken a host interrupt in HYP mode (ie
 		 * while executing the guest). This interrupt is still
 		 * pending, as we haven't serviced it yet!
@@ -732,16 +759,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		guest_exit();
 		trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
 
-		/*
-		 * We must sync the PMU and timer state before the vgic state so
-		 * that the vgic can properly sample the updated state of the
-		 * interrupt line.
-		 */
-		kvm_pmu_sync_hwstate(vcpu);
-		kvm_timer_sync_hwstate(vcpu);
-
-		kvm_vgic_sync_hwstate(vcpu);
-
 		preempt_enable();
 
 		ret = handle_exit(vcpu, run, ret);
@@ -753,8 +770,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		kvm_pmu_update_run(vcpu);
 	}
 
-	if (vcpu->sigset_active)
-		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+	kvm_sigset_deactivate(vcpu);
+
 	return ret;
 }
 
@@ -1309,7 +1326,7 @@ static int init_subsystems(void)
 	/*
 	 * Init HYP architected timer support
 	 */
-	err = kvm_timer_hyp_init();
+	err = kvm_timer_hyp_init(vgic_present);
 	if (err)
 		goto out;
 
@@ -1438,6 +1455,46 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
 	return NULL;
 }
 
+bool kvm_arch_has_irq_bypass(void)
+{
+	return true;
+}
+
+int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
+				      struct irq_bypass_producer *prod)
+{
+	struct kvm_kernel_irqfd *irqfd =
+		container_of(cons, struct kvm_kernel_irqfd, consumer);
+
+	return kvm_vgic_v4_set_forwarding(irqfd->kvm, prod->irq,
+					  &irqfd->irq_entry);
+}
+void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
+				      struct irq_bypass_producer *prod)
+{
+	struct kvm_kernel_irqfd *irqfd =
+		container_of(cons, struct kvm_kernel_irqfd, consumer);
+
+	kvm_vgic_v4_unset_forwarding(irqfd->kvm, prod->irq,
+				     &irqfd->irq_entry);
+}
+
+void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons)
+{
+	struct kvm_kernel_irqfd *irqfd =
+		container_of(cons, struct kvm_kernel_irqfd, consumer);
+
+	kvm_arm_halt_guest(irqfd->kvm);
+}
+
+void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons)
+{
+	struct kvm_kernel_irqfd *irqfd =
+		container_of(cons, struct kvm_kernel_irqfd, consumer);
+
+	kvm_arm_resume_guest(irqfd->kvm);
+}
+
 /**
  * Initialize Hyp-mode and memory mappings on all CPUs.
  */
@@ -1448,7 +1505,7 @@ int kvm_arch_init(void *opaque)
 	bool in_hyp_mode;
 
 	if (!is_hyp_mode_available()) {
-		kvm_err("HYP mode not available\n");
+		kvm_info("HYP mode not available\n");
 		return -ENODEV;
 	}