KVM, pkeys: expose CPUID/CR4 to guest

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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>

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This commit is contained in:

Huaitong Han 2016-03-22 16:51:21 +08:00 • committed by Paolo Bonzini

parent be94f6b710

commit b9baba8614

4 changed files with 37 additions and 6 deletions

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3

arch/x86/include/asm/kvm_host.h

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23

arch/x86/kvm/cpuid.c

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8

arch/x86/kvm/cpuid.h

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9

arch/x86/kvm/x86.c

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