[PATCH v4 15/17] kvm: x86: Report CORE_CAPABILITY on GET_SUPPORTED_CPUID

Fenghua Yu
2019-03-02T02:45:09Z

From: Xiaoyao Li <xiaoyao.li@linux.intel.com>

In the latest Intel SDM, CPUID.(EAX=7H,ECX=0):EDX[30] will enumerate
the presence of the IA32_CORE_CAPABILITY MSR.

Update GET_SUPPORTED_CPUID to expose this feature bit to user space, so
that user space know this bit can be enabled in CPUID.

Signed-off-by: Xiaoyao Li <xiaoyao.li@linux.intel.com>
---
arch/x86/kvm/cpuid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index c07958b59f50..e0e17b9c65da 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -410,7 +410,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
/* cpuid 7.0.edx*/
const u32 kvm_cpuid_7_0_edx_x86_features =
F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) |
- F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(INTEL_STIBP);
+ F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(CORE_CAPABILITY) |
+ F(INTEL_STIBP);

/* all calls to cpuid_count() should be made on the same cpu */
get_cpu();
--
2.7.4