Messages in this thread | | | Date | Fri, 16 Apr 2021 18:10:30 +0200 | From | Borislav Petkov <> | Subject | Re: [RFCv2 02/13] x86/kvm: Introduce KVM memory protection feature |
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On Fri, Apr 16, 2021 at 06:40:55PM +0300, Kirill A. Shutemov wrote: > Provide basic helpers, KVM_FEATURE, CPUID flag and a hypercall. > > Host side doesn't provide the feature yet, so it is a dead code for now. > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> > --- > arch/x86/include/asm/cpufeatures.h | 1 + > arch/x86/include/asm/kvm_para.h | 5 +++++ > arch/x86/include/uapi/asm/kvm_para.h | 3 ++- > arch/x86/kernel/kvm.c | 17 +++++++++++++++++ > include/uapi/linux/kvm_para.h | 3 ++- > 5 files changed, 27 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h > index 84b887825f12..d8f3d2619913 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -238,6 +238,7 @@ > #define X86_FEATURE_VMW_VMMCALL ( 8*32+19) /* "" VMware prefers VMMCALL hypercall instruction */ > #define X86_FEATURE_SEV_ES ( 8*32+20) /* AMD Secure Encrypted Virtualization - Encrypted State */ > #define X86_FEATURE_VM_PAGE_FLUSH ( 8*32+21) /* "" VM Page Flush MSR is supported */ > +#define X86_FEATURE_KVM_MEM_PROTECTED ( 8*32+22) /* "" KVM memory protection extension */
That feature bit is still unused.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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