Re: [RFCv1 2/7] x86/kvm: Introduce KVM memory protection feature

2021-04-09 Thread Borislav Petkov
On Fri, Apr 09, 2021 at 04:36:01PM +0300, Kirill A. Shutemov wrote: > The patchset is still in path-finding stage. I'll be more specific once we > settle on how the feature works. This is not why I'm asking: these feature bits are visible to userspace in /proc/cpuinfo and if you don't have a use c

Re: [RFCv1 2/7] x86/kvm: Introduce KVM memory protection feature

2021-04-09 Thread Kirill A. Shutemov
On Thu, Apr 08, 2021 at 11:52:35AM +0200, Borislav Petkov wrote: > On Fri, Apr 02, 2021 at 06:26:40PM +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. > > > > Signe

Re: [RFCv1 2/7] x86/kvm: Introduce KVM memory protection feature

2021-04-08 Thread Borislav Petkov
On Fri, Apr 02, 2021 at 06:26:40PM +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 > --- > arch/x86/include/asm/cpufeatures.h |

[RFCv1 2/7] x86/kvm: Introduce KVM memory protection feature

2021-04-02 Thread Kirill A. Shutemov
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 --- arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/kvm_para.h | 5 + arch/x86/include/uapi/asm/