| Subject | Re: [PATCH v5 14/28] x86/fpu/xstate: Prevent unauthorised use of dynamic user state | From | Dave Hansen <> | Date | Wed, 16 Jun 2021 09:17:12 -0700 |
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On 5/23/21 12:32 PM, Chang S. Bae wrote: > Intel's Extended Feature Disable (XFD) feature is an extension of the XSAVE > architecture. XFD allows the kernel to enable a feature state in XCR0 and > to receive a #NM trap when a task uses instructions accessing that state. > In this way, Linux can control the access to that state.
Please change the subject of this patch. It's a crime to not have it say XFD, "feature" or "disable".
I'd suggest:
x86/fpu/xstate: use feature disable (XFD) to protect dynamic user state
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