Re: [Xen-devel] [PATCH] x86/xstate: don't clobber or leak state when using XSAVES

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 25/04/16 08:07, Jan Beulich wrote:
> Commit 4d27280572 ("x86/xsaves: fix overwriting between non-lazy/lazy
> xsaves") switched to always saving full state when using compacted
> format (which is the only one XSAVES allows). It didn't, however, also
> adjust the restore side: In order to save full state, we also need to
> make sure we always load full state, or else the subject vCPU's state
> would get clobbered by that of the vCPU which happened to last have in
> use the respective component(s).
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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