Re: [PATCH] add tlbi=off to disable INVLPGB

[Borislav Petkov]

On Fri, Jul 31, 2026 at 10:46:56AM +0200, Peter Zijlstra wrote:
> There is IPMI and other fancy remote management stuff these days. There
> is no reason to suffer hearing loss for entering server rooms anymore
> :-)

Oh but but, there are folks who really really use hearing protection gear and
enter such rooms. I visited one recently.

> Didn't we have a case where INVLPGB was disabled due to firmware or
> something? I was thinking tlbi=broadcast could be used to force enable
> it or something.

I don't think you can force-enable it, no matter how much you wanted. :-)

> Anyway, if that case don't exist, then yeah.

Yeah, let's start minimal.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette