Re: [PATCH] x86/cpu: Add INVLPGB CPU feature flag to /proc/cpuinfo

[Dave Hansen]

On 3/18/26 10:52, Yongting Lin wrote:
> commit 767ae437a32d ("x86/mm: Add INVLPGB feature and Kconfig entry")
> introduced support for the INVLPGB instruction as a fast TLB
> invalidation mechanism. However, no corresponding CPU feature flag is
> exposed via /proc/cpuinfo.

The patch is probably OK, but the changelog is insufficient. Could you
please read through:

	Documentation/arch/x86/cpuinfo.rst

and use that structure to construct a justification for why this feature
is needed?

I'd also just appreciate a blurb on why you care. Why did you bother to
send this patch?