Re: [Xen-devel] [PATCH 1/4] x86/xstate: fix xcomp_bv initialization

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 29/01/16 10:26, Jan Beulich wrote:
> We must not clear the compaction bit when using XSAVES/XRSTORS. And
> we need to guarantee that xcomp_bv never has any bits clear which
> are set in xstate_bv (which requires partly undoing commit 83ae0bb226
> ["x86/xsave: simplify xcomp_bv initialization"]). Split initialization
> of xcomp_bv from the other FPU/SSE/AVX related state setup in
> arch_set_info_guest() and hvm_load_cpu_ctxt().
>
> Reported-by: Harmandeep Kaur <write.harmandeep@xxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

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

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