[libvirt] [PATCH qom-cpu 07/11] target-i386: check/enforce: Check all CPUID.80000001H.EDX bits

Eduardo Habkost
2013-01-04T22:01:08Z

I have no idea why PPRO_FEATURES was being ignored on the check of the
CPUID.80000001H.EDX bits. I believe it was a mistake, and it was
supposed to be ~(PPRO_FEATURES & CPUID_EXT2_AMD_ALIASES) or just
~CPUID_EXT2_AMD_ALIASES, because some time ago kvm_cpu_fill_host() used
the CPUID instruction directly (instead of
kvm_arch_get_supported_cpuid()).

But now kvm_cpu_fill_host() use kvm_arch_get_supported_cpuid(), and
kvm_arch_get_supported_cpuid() returns all supported bits for
CPUID.80000001H.EDX, even the AMD aliases (that are explicitly copied
from CPUID.01H.EDX), so we can make the code check/enforce all the
CPUID.80000001H.EDX bits.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
target-i386/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 42c4c99..ce64b98 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -972,7 +972,7 @@ static int kvm_check_features_against_host(x86_def_t *guest_def)
{&guest_def->ext_features, &host_def.ext_features,
~0, ext_feature_name, 0x00000001, R_ECX},
{&guest_def->ext2_features, &host_def.ext2_features,
- ~PPRO_FEATURES, ext2_feature_name, 0x80000001, R_EDX},
+ ~0, ext2_feature_name, 0x80000001, R_EDX},
{&guest_def->ext3_features, &host_def.ext3_features,
~CPUID_EXT3_SVM, ext3_feature_name, 0x80000001, R_ECX}
};
--
1.7.11.7