On Fri, Oct 05, 2018 at 08:56:09PM +0000, Moger, Babu wrote: > From: Sherry Hurwitz <sherry.hurw...@amd.com> > > The feature bit X86_FEATURE_MBA is detected via CPUID leaf 0x80000008 > EBX Bit 06. This bit indicates the support of AMD's MBA feature. > > This feature is supported by both Intel and AMD. But they are detected > different CPUID leaves. > > Signed-off-by: Babu Moger <babu.mo...@amd.com> > Signed-off-by: Sherry Hurwitz <sherry.hurw...@amd.com>
This SOB chain should be the other way around - first Sherry, then you. > --- > arch/x86/kernel/cpu/scattered.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c > index 772c219b6889..bd7853334b27 100644 > --- a/arch/x86/kernel/cpu/scattered.c > +++ b/arch/x86/kernel/cpu/scattered.c > @@ -17,7 +17,11 @@ struct cpuid_bit { > u32 sub_leaf; > }; > > -/* Please keep the leaf sorted by cpuid_bit.level for faster search. */ > +/* > + * Please keep the leaf sorted by cpuid_bit.level for faster search. > + * X86_FEATURE_MBA supported by both Intel and AMD. But the cpuid > + * levels are different. Add a separate enty for each. > + */ > static const struct cpuid_bit cpuid_bits[] = { > { X86_FEATURE_APERFMPERF, CPUID_ECX, 0, 0x00000006, 0 }, > { X86_FEATURE_EPB, CPUID_ECX, 3, 0x00000006, 0 }, > @@ -29,6 +33,7 @@ static const struct cpuid_bit cpuid_bits[] = { > { X86_FEATURE_HW_PSTATE, CPUID_EDX, 7, 0x80000007, 0 }, > { X86_FEATURE_CPB, CPUID_EDX, 9, 0x80000007, 0 }, > { X86_FEATURE_PROC_FEEDBACK, CPUID_EDX, 11, 0x80000007, 0 }, > + { X86_FEATURE_MBA, CPUID_EBX, 6, 0x80000008, 0 }, > { X86_FEATURE_SME, CPUID_EAX, 0, 0x8000001f, 0 }, > { X86_FEATURE_SEV, CPUID_EAX, 1, 0x8000001f, 0 }, > { 0, 0, 0, 0, 0 } > -- With that fixed: Reviewed-by: Borislav Petkov <b...@suse.de> -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.