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Diffstat (limited to 'arch/arm/kvm/arm.c')
-rw-r--r--arch/arm/kvm/arm.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index d9631ecdd..bc738d2b8 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -171,7 +171,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
int r;
switch (ext) {
case KVM_CAP_IRQCHIP:
- case KVM_CAP_IRQFD:
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
case KVM_CAP_USER_MEMORY:
@@ -532,6 +531,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
kvm_vgic_flush_hwstate(vcpu);
kvm_timer_flush_hwstate(vcpu);
+ preempt_disable();
local_irq_disable();
/*
@@ -544,6 +544,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) {
local_irq_enable();
+ preempt_enable();
kvm_timer_sync_hwstate(vcpu);
kvm_vgic_sync_hwstate(vcpu);
continue;
@@ -553,14 +554,16 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
* Enter the guest
*/
trace_kvm_entry(*vcpu_pc(vcpu));
- kvm_guest_enter();
+ __kvm_guest_enter();
vcpu->mode = IN_GUEST_MODE;
ret = kvm_call_hyp(__kvm_vcpu_run, vcpu);
vcpu->mode = OUTSIDE_GUEST_MODE;
- kvm_guest_exit();
- trace_kvm_exit(kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
+ /*
+ * Back from guest
+ *************************************************************/
+
/*
* We may have taken a host interrupt in HYP mode (ie
* while executing the guest). This interrupt is still
@@ -574,8 +577,17 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
local_irq_enable();
/*
- * Back from guest
- *************************************************************/
+ * We do local_irq_enable() before calling kvm_guest_exit() so
+ * that if a timer interrupt hits while running the guest we
+ * account that tick as being spent in the guest. We enable
+ * preemption after calling kvm_guest_exit() so that if we get
+ * preempted we make sure ticks after that is not counted as
+ * guest time.
+ */
+ kvm_guest_exit();
+ trace_kvm_exit(kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
+ preempt_enable();
+
kvm_timer_sync_hwstate(vcpu);
kvm_vgic_sync_hwstate(vcpu);