From: Radim Krčmář <rkrcmar@redhat.com>
Date: Tue, 11 Mar 2014 18:11:18 +0000 (+0100)
Subject: KVM: SVM: fix cr8 intercept window
X-Git-Tag: v3.2.56~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6c885403b60fe0fadb3d11319007827617e5bdb0;p=pandora-kernel.git

KVM: SVM: fix cr8 intercept window

commit 596f3142d2b7be307a1652d59e7b93adab918437 upstream.

We always disable cr8 intercept in its handler, but only re-enable it
if handling KVM_REQ_EVENT, so there can be a window where we do not
intercept cr8 writes, which allows an interrupt to disrupt a higher
priority task.

Fix this by disabling intercepts in the same function that re-enables
them when needed. This fixes BSOD in Windows 2008.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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