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[Xen-changelog] [xen-unstable] svm: Properly mask unsupported bits in CP

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Subject:	[Xen-changelog] [xen-unstable] svm: Properly mask unsupported bits in CPUID_80000001_ECX.
From:	Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>
Date:	Sat, 12 Jan 2008 06:30:13 -0800
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# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1200130178 0
# Node ID a30aabe3c84a71404202f6b18d06cb313842ee23
# Parent  51aa2f884f6446b7e376a749ead8038359b70ec1
svm: Properly mask unsupported bits in CPUID_80000001_ECX.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/arch/x86/hvm/svm/svm.c |    6 ++++++
 1 files changed, 6 insertions(+)

diff -r 51aa2f884f64 -r a30aabe3c84a xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c        Fri Jan 11 11:01:36 2008 +0000
+++ b/xen/arch/x86/hvm/svm/svm.c        Sat Jan 12 09:29:38 2008 +0000
@@ -1009,6 +1009,12 @@ static void svm_vmexit_do_cpuid(struct v
         __clear_bit(X86_FEATURE_PSE36 & 31, &edx);
 
         /* Filter all other features according to a whitelist. */
+        ecx &= (bitmaskof(X86_FEATURE_LAHF_LM) |
+                bitmaskof(X86_FEATURE_ALTMOVCR) |
+                bitmaskof(X86_FEATURE_ABM) |
+                bitmaskof(X86_FEATURE_SSE4A) |
+                bitmaskof(X86_FEATURE_MISALIGNSSE) |
+                bitmaskof(X86_FEATURE_3DNOWPF));
         edx &= (0x0183f3ff | /* features shared with 0x00000001:EDX */
                 bitmaskof(X86_FEATURE_NX) |
                 bitmaskof(X86_FEATURE_LM) |

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