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Re: [PATCH] x86: determine MXCSR mask in all cases

  • To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Mon, 18 May 2020 14:43:13 +0100
  • Authentication-results: esa4.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none
  • Cc: Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Delivery-date: Mon, 18 May 2020 13:43:23 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 18/05/2020 14:16, Jan Beulich wrote:
> For its use(s) by the emulator to be correct in all cases, the filling
> of the variable needs to be independent of XSAVE availability. As
> there's no suitable function in i387.c to put the logic in, keep it in
> xstate_init(), arrange for the function to be called unconditionally,
> and pull the logic ahead of all return paths there.
>
> Fixes: 9a4496a35b20 ("x86emul: support {,V}{LD,ST}MXCSR")
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

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

 

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