Re: [PATCH] x86/mm: Disable INVLPGB when PTI is enabled

[Dave Hansen]

On 6/10/25 17:43, Rik van Riel wrote:
> On Tue, 2025-06-10 at 15:24 -0700, Dave Hansen wrote:
>> Disable INVLPGB if PTI is enabled. Avoid overrunning the small
>> bitmap.
>>
>> Note: this will be fixed up properly by making the bitmap bigger.
>> For now, just avoid the mostly theoretical bug.
>>
> Does that mean the patch to make the bitmap bigger
> is a dependency that needs to be in place before
> the RAR code (hoping to send out v4 later this week)
> can be merged?

That's what I was thinking. Your series to fix this all up properly from
last week looks like the right way. It just seems like a wee bit more
work than I want to see getting backported. It's not a huge lift, though.