x86/cpu: Detect VMX features on Intel, Centaur and Zhaoxin CPUs
Add an entry in struct cpuinfo_x86 to track VMX capabilities and fill
the capabilities during IA32_FEAT_CTL MSR initialization.
Make the VMX capabilities dependent on IA32_FEAT_CTL and
X86_FEATURE_NAMES so as to avoid unnecessary overhead on CPUs that can't
possibly support VMX, or when /proc/cpuinfo is not available.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20191221044513.21680-11-sean.j.christopherson@intel.com
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 526425f..bc3a497 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -391,6 +391,10 @@
def_bool y
depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR || CPU_SUP_ZHAOXIN
+config X86_VMX_FEATURE_NAMES
+ def_bool y
+ depends on IA32_FEAT_CTL && X86_FEATURE_NAMES
+
menuconfig PROCESSOR_SELECT
bool "Supported processor vendors" if EXPERT
---help---
