Messages in this thread | | | Date | Thu, 16 Feb 2017 19:13:55 +0100 | From | Borislav Petkov <> | Subject | Re: [RFC PATCH v4 03/28] x86: Add the Secure Memory Encryption CPU feature |
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On Thu, Feb 16, 2017 at 09:42:36AM -0600, Tom Lendacky wrote: > Update the CPU features to include identifying and reporting on the > Secure Memory Encryption (SME) feature. SME is identified by CPUID > 0x8000001f, but requires BIOS support to enable it (set bit 23 of > SYS_CFG MSR). Only show the SME feature as available if reported by > CPUID and enabled by BIOS. > > Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> > --- > arch/x86/include/asm/cpufeature.h | 7 +++++-- > arch/x86/include/asm/cpufeatures.h | 5 ++++- > arch/x86/include/asm/disabled-features.h | 3 ++- > arch/x86/include/asm/msr-index.h | 2 ++ > arch/x86/include/asm/required-features.h | 3 ++- > arch/x86/kernel/cpu/common.c | 19 +++++++++++++++++++ > 6 files changed, 34 insertions(+), 5 deletions(-)
What happened here?
You had it already:
https://lkml.kernel.org/r/20161110003459.3280.25796.stgit@tlendack-t1.amdoffice.net
The bit in get_cpu_cap() with checking the MSR you can add at the end of init_amd() for example.
-- Regards/Gruss, Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
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