Messages in this thread | | | Date | Thu, 14 Oct 2021 17:34:14 +0300 | From | Ville Syrjälä <> | Subject | Re: [regression] commit d298b03506d3 ("x86/fpu: Restore the masking out of reserved MXCSR bits") |
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On Thu, Oct 14, 2021 at 04:27:07PM +0200, Borislav Petkov wrote: > On Thu, Oct 14, 2021 at 02:44:33PM +0300, Ville Syrjälä wrote: > > I have a 32bit installation here that stopped working. Bisected it > > to commit d298b03506d3 ("x86/fpu: Restore the masking out of reserved > > MXCSR bits"). > > Lemme make sure I understand this correctly: this patch is bad and with > it reverted it works?
Yes.
> > Because before this patch, the restoring would be a more restrictive > than before and this patch reverts the code to the old behavior for > invalid MXCSR bits. > > > 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.
-- Ville Syrjälä Intel
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