Re: [PATCH v4 1/6] x86/bugs: Add asm helpers for executing VERW

[Josh Poimboeuf]

On Fri, Dec 01, 2023 at 07:39:05PM +0000, Andrew Cooper wrote:
> On 01/12/2023 7:36 pm, Josh Poimboeuf wrote:
> > On Fri, Oct 27, 2023 at 07:38:40AM -0700, Pawan Gupta wrote:
> >> +.pushsection .entry.text, "ax"
> >> +
> >> +.align L1_CACHE_BYTES, 0xcc
> >> +SYM_CODE_START_NOALIGN(mds_verw_sel)
> >> +	UNWIND_HINT_UNDEFINED
> >> +	ANNOTATE_NOENDBR
> >> +	.word __KERNEL_DS
> >> +.align L1_CACHE_BYTES, 0xcc
> >> +SYM_CODE_END(mds_verw_sel);
> >> +/* For KVM */
> >> +EXPORT_SYMBOL_GPL(mds_verw_sel);
> >> +
> >> +.popsection
> > This is data, so why is it "CODE" in .entry.text?
> 
> Because KPTI.

Urgh... Pawan please add a comment.

-- 
Josh