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Re: [Xen-devel] [PATCH v2] x86emul: avoid triggering assertions with VME/PVI early #GP check


  • To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Tue, 18 Dec 2018 13:52:11 +0000
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  • Cc: Wei Liu <wei.liu2@xxxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
  • Delivery-date: Tue, 18 Dec 2018 13:52:47 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 11/12/2018 08:47, Jan Beulich wrote:
> In commit efe9cba66c ("x86emul: VME and PVI modes require a #GP(0) check
> first thing") I neglected the fact that the retire flags get zapped only
> in x86_decode(), which hasn't been invoked yet at the point of the #GP(0)
> check added. Move output state initialization into a helper function,
> and invoke it from the callers of x86_decode() instead of doing it
> (possibly too late) in that function.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

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

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