Re: [regression] commit d298b03506d3 ("x86/fpu: Restore the masking out of reserved MXCSR bits")

[Borislav Petkov]

On Thu, Oct 14, 2021 at 05:34:14PM +0300, Ville Syrjälä wrote:
> > > Tested the same disk on on both a 64bit capable Pentium D
> > > and a 32bit only Pentium 4 just to rule out the specific CPU.
> > > Busted on both.
> > 
> > So that's a purely 32-bit installation and a 32-bit kernel and you've
> > booted it on two different machines?
> 
> Yes.

This is insane, grrr!

So Ser's report was about an old 32-bit Intel CPU failing:

https://lore.kernel.org/all/YVtA67jImg3KlBTw@xxxxxxx/T/#u

so if we revert, it'll break booting on his machine.

Can you give /proc/cpuinfo from your machines?

Thx.

-- 
Regards/Gruss,
    Boris.

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