diff options
| author | Yang, Wei Y <wei.y.yang@intel.com> | 2011-06-03 11:14:03 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-12 13:16:14 +0300 |
| commit | 611c120f7486a19e7df2225f875a52ef0b599ae8 (patch) | |
| tree | 52f8d2ce975953d081bdd1176a4ab32cd548bd48 /arch/x86/kvm/x86.c | |
| parent | c68b734fba402b9bfdd49e23b776c42dbeaf1f5b (diff) | |
| download | linux-611c120f7486a19e7df2225f875a52ef0b599ae8.tar.bz2 | |
KVM: Mask function7 ebx against host capability word9
This patch masks CPUID leaf 7 ebx against host capability word9.
Signed-off-by: Yang, Wei <wei.y.yang@intel.com>
Signed-off-by: Shan, Haitao <haitao.shan@intel.com>
Signed-off-by: Li, Xin <xin.li@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index ba5cd27b429a..ff4623b1b102 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2359,6 +2359,10 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, F(ACE2) | F(ACE2_EN) | F(PHE) | F(PHE_EN) | F(PMM) | F(PMM_EN); + /* cpuid 7.0.ebx */ + const u32 kvm_supported_word9_x86_features = + F(SMEP); + /* all calls to cpuid_count() should be made on the same cpu */ get_cpu(); do_cpuid_1_ent(entry, function, index); @@ -2393,7 +2397,7 @@ 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; @@ -2410,8 +2414,22 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, } break; } + case 7: { + entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; + /* Mask ebx against host capbability word 9 */ + if (index == 0) { + entry->ebx &= kvm_supported_word9_x86_features; + cpuid_mask(&entry->ebx, 9); + } else + entry->ebx = 0; + entry->eax = 0; + entry->ecx = 0; + entry->edx = 0; + break; + } case 9: break; + /* function 0xb has additional index. */ case 0xb: { int i, level_type; |