Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 16 Jun 2020 20:01:23 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH] x86/fpu: Reset MXCSR to default in kernel_fpu_begin() |
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On Tue, Jun 16, 2020 at 09:53:39AM -0700, Andy Lutomirski wrote: > On Tue, Jun 16, 2020 at 2:53 AM Borislav Petkov <bp@alien8.de> wrote: > > > > Ok, > > > > here's the fix first so that it goes in. I'll hammer on the test case later. > > Does the 32-bit case need FNINIT?
Pasting from IRC:
I'm thinking if you'd need to reinit the FPU, then you need to do it for both, not only 32-bit or do you mean something else? Also, if you end up doing FNSAVE (old CPU) that one reinits state.
Whatever we decide doing, this should be a separate patch anyway.
Thx.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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