Messages in this thread | | | Date | Tue, 4 Oct 2022 07:18:43 -0700 | Subject | Re: [PATCH v2 06/39] x86/fpu: Add helper for modifying xstate | From | Dave Hansen <> |
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On 10/3/22 13:05, Edgecombe, Rick P wrote: > The CET state is xsaves managed. It gets lazily restored before > returning to userspace with the rest of the fpu stuff. This function > will force restore all the fpu state to the registers early and lock > them from being automatically saved/restored. Then the tasks CET state > can be modified in the MSRs, before unlocking the fpregs. Last time I > tried to modify the state directly in the xsave buffer when it was > efficient, but it had issues and Thomas suggested this.
Can you get the gist of this in a comment, please?
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