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| author | Gleb Natapov <gleb@redhat.com> | 2013-09-25 12:51:33 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-09-30 09:14:23 +0200 |
| commit | e0b890d35cdff506b72129b55a166d22fc9bfa64 (patch) | |
| tree | 103b203c928e87b11c163a202e0441edda2b5e8a /arch/x86/kvm/vmx.c | |
| parent | 6a3f95a6b04cd5efaa45269e453ef30b8680062e (diff) | |
| download | lwn-e0b890d35cdff506b72129b55a166d22fc9bfa64.tar.gz lwn-e0b890d35cdff506b72129b55a166d22fc9bfa64.zip | |
KVM: nVMX: Amend nested_run_pending logic
EXIT_REASON_VMLAUNCH/EXIT_REASON_VMRESUME exit does not mean that nested
VM will actually run during next entry. Move setting nested_run_pending
closer to vmentry emulation code and move its clearing close to vmexit to
minimize amount of code that will erroneously run with nested_run_pending
set.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e6e8fbc02d5e..7eb05126b44c 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6742,20 +6742,6 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu) if (vmx->emulation_required) return handle_invalid_guest_state(vcpu); - /* - * the KVM_REQ_EVENT optimization bit is only on for one entry, and if - * we did not inject a still-pending event to L1 now because of - * nested_run_pending, we need to re-enable this bit. - */ - if (vmx->nested.nested_run_pending) - kvm_make_request(KVM_REQ_EVENT, vcpu); - - if (!is_guest_mode(vcpu) && (exit_reason == EXIT_REASON_VMLAUNCH || - exit_reason == EXIT_REASON_VMRESUME)) - vmx->nested.nested_run_pending = 1; - else - vmx->nested.nested_run_pending = 0; - if (is_guest_mode(vcpu) && nested_vmx_exit_handled(vcpu)) { nested_vmx_vmexit(vcpu); return 1; @@ -7290,6 +7276,16 @@ static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu) vmx->exit_reason = vmcs_read32(VM_EXIT_REASON); trace_kvm_exit(vmx->exit_reason, vcpu, KVM_ISA_VMX); + /* + * the KVM_REQ_EVENT optimization bit is only on for one entry, and if + * we did not inject a still-pending event to L1 now because of + * nested_run_pending, we need to re-enable this bit. + */ + if (vmx->nested.nested_run_pending) + kvm_make_request(KVM_REQ_EVENT, vcpu); + + vmx->nested.nested_run_pending = 0; + vmx_complete_atomic_exit(vmx); vmx_recover_nmi_blocking(vmx); vmx_complete_interrupts(vmx); @@ -7948,6 +7944,8 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch) enter_guest_mode(vcpu); + vmx->nested.nested_run_pending = 1; + vmx->nested.vmcs01_tsc_offset = vmcs_read64(TSC_OFFSET); cpu = get_cpu(); |