Re: [RFC PATCH 00/16] x86/split_lock: Enable #AC exception for split locked accesses

[Dave Hansen]

On 05/27/2018 08:45 AM, Fenghua Yu wrote:
> ==Detect Split Lock==
> 
> To detect split lock, a new control bit (bit 29) in per-core TEST_CTL
> MSR 0x33 will be introduced in future x86 processors. When the bit 29
> is set, the processor causes #AC exception for split locked accesses at
> all CPL.
> 
> The bit 29 specification in MSR TEST_CTL is published in the latest
> Intel Architecture Instruction Set Extensions and Future Features
> Programming Reference.

The fact that this is per-core is pretty important, right?  Where does
that get mentioned?