Re: [Xen-devel] [Patch] X86: expose HLE/RTM features to pv and hvm

["Liu, Jinsong" <jinsong.liu@xxxxxxxxx>]

Ian,

any comments?

Thanks,
Jinsong


Liu, Jinsong wrote:
> X86: expose HLE/RTM features to pv and hvm
> 
> Intel recently release 2 new features, HLE and TRM.
> Refer to http://software.intel.com/file/41417.
> This patch expose them to pv and hvm
> 
> Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
> 
> diff -r 8174412310fa tools/libxc/xc_cpufeature.h
> --- a/tools/libxc/xc_cpufeature.h     Mon Feb 27 02:23:43 2012 +0800
> +++ b/tools/libxc/xc_cpufeature.h     Mon Feb 27 03:41:13 2012 +0800
> @@ -129,10 +129,12 @@
>  /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx) */
>  #define X86_FEATURE_FSGSBASE     0 /* {RD,WR}{FS,GS}BASE
>  instructions */ #define X86_FEATURE_BMI1         3 /* 1st group bit
> manipulation extensions */ +#define X86_FEATURE_HLE          4 /*
>  Hardware Lock Elision */ #define X86_FEATURE_AVX2         5 /* AVX2
>  instructions */ #define X86_FEATURE_SMEP         7 /* Supervisor
>  Mode Execution Protection */ #define X86_FEATURE_BMI2         8 /*
>  2nd group bit manipulation extensions */ #define X86_FEATURE_ERMS   
>  9 /* Enhanced REP MOVSB/STOSB */ #define X86_FEATURE_INVPCID     10
> /* Invalidate Process Context ID */ +#define X86_FEATURE_RTM        
> 11 /* Restricted Transactional Memory */ 
> 
>  #endif /* __LIBXC_CPUFEATURE_H */
> diff -r 8174412310fa tools/libxc/xc_cpuid_x86.c
> --- a/tools/libxc/xc_cpuid_x86.c      Mon Feb 27 02:23:43 2012 +0800
> +++ b/tools/libxc/xc_cpuid_x86.c      Mon Feb 27 03:41:13 2012 +0800
> @@ -362,11 +362,13 @@
>      case 0x00000007: /* Intel-defined CPU features */
>          if ( input[1] == 0 ) {
>              regs[1] &= (bitmaskof(X86_FEATURE_BMI1) |
> +                        bitmaskof(X86_FEATURE_HLE)  |
>                          bitmaskof(X86_FEATURE_AVX2) |
>                          bitmaskof(X86_FEATURE_SMEP) |
>                          bitmaskof(X86_FEATURE_BMI2) |
>                          bitmaskof(X86_FEATURE_ERMS) |
>                          bitmaskof(X86_FEATURE_INVPCID) |
> +                        bitmaskof(X86_FEATURE_RTM)  |
>                          bitmaskof(X86_FEATURE_FSGSBASE));
>          } else
>              regs[1] = 0;
> @@ -495,9 +497,11 @@
>      case 0x00000007:
>          if ( input[1] == 0 )
>              regs[1] &= (bitmaskof(X86_FEATURE_BMI1) |
> +                        bitmaskof(X86_FEATURE_HLE)  |
>                          bitmaskof(X86_FEATURE_AVX2) |
>                          bitmaskof(X86_FEATURE_BMI2) |
>                          bitmaskof(X86_FEATURE_ERMS) |
> +                        bitmaskof(X86_FEATURE_RTM)  |
>                          bitmaskof(X86_FEATURE_FSGSBASE));
>          else
>              regs[1] = 0;

Attachment: expose_hlertm_for_pvhvm.patch
Description: expose_hlertm_for_pvhvm.patch

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