lkml.org 
[lkml]   [2008]   [Apr]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 04/31] KVM: SVM: align shadow CR4.MCE with host
Date
From: Joerg Roedel <joerg.roedel@amd.com>

This patch aligns the host version of the CR4.MCE bit with the CR4 active in
the guest. This is necessary to get MCE exceptions when the guest is running.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
arch/x86/kvm/svm.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index d7439ce..8af463b 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -878,9 +878,12 @@ set:

static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
+ unsigned long host_cr4_mce = read_cr4() & X86_CR4_MCE;
+
vcpu->arch.cr4 = cr4;
if (!npt_enabled)
cr4 |= X86_CR4_PAE;
+ cr4 |= host_cr4_mce;
to_svm(vcpu)->vmcb->save.cr4 = cr4;
}

--
1.5.5


\
 
 \ /
  Last update: 2008-04-21 12:33    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site