linux-kernel - [PATCH 31/47] KVM: SVM: check for nested VINTR flag in svm_interrupt

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Message-Id: <1251282609-12835-32-git-send-email-avi@redhat.com>
Date:	Wed, 26 Aug 2009 13:29:53 +0300
From:	Avi Kivity <avi@...hat.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 31/47] KVM: SVM: check for nested VINTR flag in svm_interrupt_allowed

From: Joerg Roedel <joerg.roedel@....com>

Not checking for this flag breaks any nested hypervisor that does not
set VINTR. So fix it with this patch.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
Signed-off-by: Avi Kivity <avi@...hat.com>
---
 arch/x86/kvm/svm.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ff04a4b..825035e 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2466,7 +2466,7 @@ static int svm_interrupt_allowed(struct kvm_vcpu *vcpu)
 	return (vmcb->save.rflags & X86_EFLAGS_IF) &&
 		!(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) &&
 		gif_set(svm) &&
-		!is_nested(svm);
+		!(is_nested(svm) && (svm->vcpu.arch.hflags & HF_VINTR_MASK));
 }
 
 static void enable_irq_window(struct kvm_vcpu *vcpu)
-- 
1.6.4.1

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