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Re: [PATCH 1/3] x86/HVM: permit CLFLUSH{,OPT} on execute-only code segments

To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: "Durrant, Paul" <xadimgnik@xxxxxxxxx>
Date: Fri, 10 Dec 2021 04:53:41 -0800
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Paul Durrant <paul@xxxxxxx>
Delivery-date: Fri, 10 Dec 2021 12:54:01 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 03/12/2021 03:21, Jan Beulich wrote:

The SDM explicitly permits this, and since that's sensible behavior
don't special case AMD (where the PM doesn't explicitly say so).

Fixes: 52dba7bd0b36 ("x86emul: generalize wbinvd() hook")
Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>


Acked-by: Paul Durrant <paul@xxxxxxx>

References:
- [PATCH 0/3] x86: insn-fetch related emulation adjustments
  - From: Jan Beulich
- [PATCH 1/3] x86/HVM: permit CLFLUSH{,OPT} on execute-only code segments
  - From: Jan Beulich

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