According to the SDM, "interrupt-window exiting" VM-exits wake a
logical processor from the same inactive states as would an external
interrupt. Specifically, they wake a logical processor from the states
entered using the HLT and MWAIT instructions.
Fixes: 6dfacadd5858 ("KVM: nVMX: Add support for activity state HLT")
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
Reviewed-by: Peter Shier <pshier@xxxxxxxxxx>
---
arch/x86/kvm/vmx.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 5f5c79e72a49..2dfd150f83bd 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -13432,6 +13432,18 @@ static bool nested_vmx_nmi_window_exit(struct kvm_vcpu *vcpu)
(GUEST_INTR_STATE_NMI | GUEST_INTR_STATE_MOV_SS));
}
+static bool nested_vmx_intr_window_exit(struct kvm_vcpu *vcpu)
+{
+ struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
+
+ return (vmcs12->cpu_based_vm_exec_control &
+ CPU_BASED_VIRTUAL_INTR_PENDING) &&
+ vmcs12->guest_activity_state != GUEST_ACTIVITY_WAIT_SIPI &&
+ (vmcs12->guest_rflags & X86_EFLAGS_IF) &&
+ !(vmcs12->guest_interruptibility_info &
+ (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS));
+}
+
/*
* nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1
* for running an L2 nested guest.
@@ -13524,12 +13536,13 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
/*
* If we're entering a halted L2 vcpu and the L2 vcpu won't be
- * awakened by event injection or by an NMI-window VM-exit,
- * halt the vcpu.
+ * awakened by event injection or by an NMI-window VM-exit or
+ * by an interrupt-window VM-exit, halt the vcpu.
*/
if ((vmcs12->guest_activity_state == GUEST_ACTIVITY_HLT) &&
!(vmcs12->vm_entry_intr_info_field & INTR_INFO_VALID_MASK) &&
- !nested_vmx_nmi_window_exit(vcpu)) {
+ !nested_vmx_nmi_window_exit(vcpu) &&
+ !nested_vmx_intr_window_exit(vcpu)) {
vmx->nested.nested_run_pending = 0;
return kvm_vcpu_halt(vcpu);
}
--
2.19.1.1215.g8438c0b245-goog
