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[9/9] KVM, pkeys: disable PKU feature without ept

Message ID 1447070055-4207-10-git-send-email-huaitong.han@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Huaitong Han Nov. 9, 2015, 11:54 a.m. UTC 
This patch disables CPUID:PKU without ept.

Signed-off-by: Huaitong Han <huaitong.han@intel.com>
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Patch

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index ece687b..e1113ae 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -447,6 +447,8 @@  static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
 			entry->ebx |= F(TSC_ADJUST);
 			entry->ecx &= kvm_supported_word11_x86_features;
 			cpuid_mask(&entry->ecx, 13);
+			if (!tdp_enabled)
+				entry->ecx &= ~F(PKU);
 		} else {
 			entry->ebx = 0;
 			entry->ecx = 0;