Messages in this thread | | | Subject | Re: [PATCH v4 10/10] x86/xsaves: Re-enable XSAVES | From | Dave Hansen <> | Date | Wed, 4 May 2016 15:46:45 -0700 |
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On 05/04/2016 03:41 PM, Dave Hansen wrote: > But, since we *always* call XSAVES with an instruction mask of -1 and > end up with a requested feature bitmap (RFBM) equal to XCR0, I think we > can do a shortcut because we'll practically *always* have an > xcomp_bv==RFBM==XCR0, which means that all (present) components will > always have an address.
Actually, we depend on that anyway. xstate_comp_offsets[] is completely bogus if we don't have xcomp_bv==RFBM==XCR0.
Perhaps we need to add those checks anyway.
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