Re: [PATCH v7 07/26] x86/fpu/xstate: Warn if kernel dynamic xfeatures detected in normal fpstate

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On 11/28/2023 11:25 PM, Edgecombe, Rick P wrote:
On Fri, 2023-11-24 at 00:53 -0500, Yang Weijiang wrote:
Kernel dynamic xfeatures now are __ONLY__ enabled for guest fpstate,
i.e.,
none for normal kernel fpstate. The bits are added when guest FPU
   ^never?

Sure, will change it, thank you!

config
is initialized. Guest fpstate is allocated with fpstate->is_guest set
to
%true.

For normal fpstate, the bits should have been removed when
initializes
kernel FPU config settings, WARN_ONCE() if kernel detects normal
fpstate
xfeatures contains kernel dynamic xfeatures before executes xsaves.

Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx>
Otherwise...

Reviewed-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>





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