Messages in this thread | | | Date | Mon, 1 Mar 2021 11:00:37 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 02/25] x86/cpufeatures: Add SGX1 and SGX2 sub-features |
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On Mon, Mar 01, 2021 at 10:44:29PM +1300, Kai Huang wrote: > From: Sean Christopherson <seanjc@google.com> > > Add SGX1 and SGX2 feature flags, via CPUID.0x12.0x0.EAX, as scattered > features, since adding a new leaf for only two bits would be wasteful. > As part of virtualizing SGX, KVM will expose the SGX CPUID leafs to its > guest, and to do so correctly needs to query hardware and kernel support > for SGX1 and SGX2. > > Signed-off-by: Sean Christopherson <seanjc@google.com> > Acked-by: Dave Hansen <dave.hansen@intel.com> > Signed-off-by: Kai Huang <kai.huang@intel.com> > --- > arch/x86/include/asm/cpufeatures.h | 2 ++ > arch/x86/kernel/cpu/cpuid-deps.c | 2 ++ > arch/x86/kernel/cpu/scattered.c | 2 ++ > 3 files changed, 6 insertions(+) > > diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h > index cc96e26d69f7..9502c445a3e9 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -290,6 +290,8 @@ > #define X86_FEATURE_FENCE_SWAPGS_KERNEL (11*32+ 5) /* "" LFENCE in kernel entry SWAPGS path */ > #define X86_FEATURE_SPLIT_LOCK_DETECT (11*32+ 6) /* #AC for split lock */ > #define X86_FEATURE_PER_THREAD_MBA (11*32+ 7) /* "" Per-thread Memory Bandwidth Allocation */ > +#define X86_FEATURE_SGX1 (11*32+ 8) /* "" Basic SGX */ > +#define X86_FEATURE_SGX2 (11*32+ 9) /* SGX Enclave Dynamic Memory Management (EDMM) */
"sgx1" is not gonna show in /proc/cpuinfo but "sgx2" will. Because...?
Also, you send a patchset once a week - not after two days. Please limit your spamming.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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