This patch masks CPUID leaf 7 ebx against host capability word9.
Signed-off-by: Yang, Wei <wei.y.yang@xxxxxxxxx>
Signed-off-by: Shan, Haitao <haitao.shan@xxxxxxxxx>
Signed-off-by: Li, Xin <xin.li@xxxxxxxxx>
---
arch/x86/kvm/x86.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 91bfc40..6e90d71 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2387,7 +2387,7 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
}
break;
}
- /* function 4 and 0xb have additional index. */
+ /* function 4 has additional index. */
case 4: {
int i, cache_type;
@@ -2404,6 +2404,11 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
}
break;
}
+ case 7:
+ /* Mask ebx against host capability word 9 */
+ if (index == 0) cpuid_mask(&entry->ebx, 9);
+ break;
+ /* function 0xb has additional index. */
case 0xb: {
int i, level_type;
--
1.7.4.1
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