Re: [PATCH v3 09/10] x86/split_lock: Define #AC for split lock feature

[Dave Hansen]

On 2/1/19 9:14 PM, Fenghua Yu wrote:
> --- a/arch/x86/include/asm/cpufeatures.h
> +++ b/arch/x86/include/asm/cpufeatures.h
> @@ -221,6 +221,7 @@
>  #define X86_FEATURE_ZEN			( 7*32+28) /* "" CPU is AMD family 0x17 (Zen) */
>  #define X86_FEATURE_L1TF_PTEINV		( 7*32+29) /* "" L1TF workaround PTE inversion */
>  #define X86_FEATURE_IBRS_ENHANCED	( 7*32+30) /* Enhanced IBRS */
> +#define X86_FEATURE_AC_SPLIT_LOCK	( 7*32+31) /* #AC for split lock */

The last time this was posted, we (Intel) promised to go get the proper
(CPUID or MSR-based) enumeration of this feature documented.  Did we do
that?  If so, where is that documentation?