On Thu, Sep 08, 2016 at 02:57:01AM -0700, Fenghua Yu wrote:
> From: Vikas Shivappa <[email protected]>
>
> This patch includes CPUID enumeration routines for Cache allocation and
> new values to track resources to the cpuinfo_x86 structure.
>
> Cache allocation provides a way for the Software (OS/VMM) to restrict
> cache allocation to a defined 'subset' of cache which may be overlapping
> with other 'subsets'. This feature is used when allocating a line in
> cache ie when pulling new data into the cache. The programming of the
> hardware is done via programming MSRs (model specific registers).
>
> Signed-off-by: Vikas Shivappa <[email protected]>
> Signed-off-by: Fenghua Yu <[email protected]>
> Reviewed-by: Tony Luck <[email protected]>
> ---
...
> diff --git a/arch/x86/include/asm/cpufeatures.h
> b/arch/x86/include/asm/cpufeatures.h
> index 92a8308..62d979b9 100644
> --- a/arch/x86/include/asm/cpufeatures.h
> +++ b/arch/x86/include/asm/cpufeatures.h
> @@ -12,7 +12,7 @@
> /*
> * Defines x86 CPU feature bits
> */
> -#define NCAPINTS 18 /* N 32-bit words worth of info */
> +#define NCAPINTS 19 /* N 32-bit words worth of info */
> #define NBUGINTS 1 /* N 32-bit bug flags */
>
> /*
> @@ -220,6 +220,7 @@
> #define X86_FEATURE_RTM ( 9*32+11) /* Restricted Transactional
> Memory */
> #define X86_FEATURE_CQM ( 9*32+12) /* Cache QoS Monitoring */
> #define X86_FEATURE_MPX ( 9*32+14) /* Memory Protection
> Extension */
> +#define X86_FEATURE_RDT ( 9*32+15) /* Resource Director
> Technology */
> #define X86_FEATURE_AVX512F ( 9*32+16) /* AVX-512 Foundation */
> #define X86_FEATURE_AVX512DQ ( 9*32+17) /* AVX-512 DQ (Double/Quad granular)
> Instructions */
> #define X86_FEATURE_RDSEED ( 9*32+18) /* The RDSEED instruction */
> @@ -286,6 +287,9 @@
> #define X86_FEATURE_SUCCOR (17*32+1) /* Uncorrectable error containment
> and recovery */
> #define X86_FEATURE_SMCA (17*32+3) /* Scalable MCA */
>
> +/* Intel-defined CPU features, CPUID level 0x00000010:0 (ebx), word 18 */
Seems like this leaf is dedicated to CAT and has only 2 feature bits
defined in the SDM. Please use init_scattered_cpuid_features() instead
of adding a whole CAP word.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284
(AG Nürnberg)
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