Re: [PATCH v4 0/9] arm64: Expose CPUID registers via emulation

[Will Deacon]

On Mon, Jan 09, 2017 at 05:28:23PM +0000, Suzuki K Poulose wrote:
> This series adds a new ABI to expose the CPU feature registers
> to the user space via emulation of MRS instruction. The system exposes
> only a limited set of feature values (See the documentation patch)
> from the cpufeature infrastructure. The feature bits that are not
> exposed are set to the 'safe value' which implies 'not supported'.
> 
> Apart from the selected feature registers, we expose MIDR_EL1 (Main
> ID Register). The user should be aware that, reading MIDR_EL1 can be
> tricky on a heterogeneous system (just like getcpu()). We export the
> value of the current CPU where 'MRS' is executed.
> 
> Applies on v4.10-rc3.

Thanks, I'll queue this for 4.11.

Will