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| author | Huaitong Han <huaitong.han@intel.com> | 2016-03-22 11:51:21 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-22 18:38:17 +0300 |
| commit | b9baba861489041b37b54fc7ee0b0006b5327151 (patch) | |
| tree | 28a3d76b7d602a2b886356b08097e82d4a7169ed /arch/x86/include/asm | |
| parent | be94f6b71067df47d623fc6c6983a8dee504fb4d (diff) | |
| download | linux-b9baba861489041b37b54fc7ee0b0006b5327151.tar.xz | |
KVM, pkeys: expose CPUID/CR4 to guest
X86_FEATURE_PKU is referred to as "PKU" in the hardware documentation:
CPUID.7.0.ECX[3]:PKU. X86_FEATURE_OSPKE is software support for pkeys,
enumerated with CPUID.7.0.ECX[4]:OSPKE, and it reflects the setting of
CR4.PKE(bit 22).
This patch disables CPUID:PKU without ept, because pkeys is not yet
implemented for shadow paging.
Signed-off-by: Huaitong Han <huaitong.han@intel.com>
Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 0d75ecdfa077..f62a9f37f79f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -84,7 +84,8 @@ | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \ | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_FSGSBASE \ - | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE | X86_CR4_SMAP)) + | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE | X86_CR4_SMAP \ + | X86_CR4_PKE)) #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) |