From: Joerg Roedel <joerg.roedel@amd.com>
To: Avi Kivity <avi@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>
Cc: <kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Joerg Roedel <joerg.roedel@amd.com>
Subject: [PATCH 1/2] KVM: SVM: Sync efer back into nested vmcb
Date: Tue, 27 Jul 2010 18:14:20 +0200 [thread overview]
Message-ID: <1280247261-19115-2-git-send-email-joerg.roedel@amd.com> (raw)
In-Reply-To: <1280247261-19115-1-git-send-email-joerg.roedel@amd.com>
This patch fixes a bug in a nested hypervisor that heavily
switches between real-mode and long-mode. The problem is
fixed by syncing back efer into the guest vmcb on emulated
vmexit.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kvm/svm.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 56c9b6b..7d10f2c 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1897,6 +1897,7 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
nested_vmcb->save.ds = vmcb->save.ds;
nested_vmcb->save.gdtr = vmcb->save.gdtr;
nested_vmcb->save.idtr = vmcb->save.idtr;
+ nested_vmcb->save.efer = svm->vcpu.arch.efer;
nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
nested_vmcb->save.cr3 = svm->vcpu.arch.cr3;
nested_vmcb->save.cr2 = vmcb->save.cr2;
--
1.7.0.4
next prev parent reply other threads:[~2010-07-27 16:14 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-27 16:14 [PATCH 0/2] Nested SVM fix and next_rip emulation Joerg Roedel
2010-07-27 16:14 ` Joerg Roedel [this message]
2010-07-27 19:07 ` [PATCH 1/2] KVM: SVM: Sync efer back into nested vmcb Avi Kivity
2010-07-28 7:54 ` Roedel, Joerg
2010-07-27 16:14 ` [PATCH 2/2] KVM: SVM: Emulate next_rip svm feature Joerg Roedel
2010-07-27 18:32 ` Avi Kivity
2010-07-28 9:37 ` Roedel, Joerg
2010-07-28 10:28 ` Avi Kivity
2010-07-28 11:25 ` Roedel, Joerg
2010-07-28 11:34 ` Avi Kivity
2010-07-28 11:51 ` Roedel, Joerg
2010-07-28 11:57 ` Avi Kivity
2010-07-28 12:18 ` Roedel, Joerg
2010-07-28 12:25 ` Avi Kivity
2010-07-28 10:28 ` [PATCH 0/2] Nested SVM fix and next_rip emulation Avi Kivity
2010-07-28 16:53 ` Marcelo Tosatti
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