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Re: [PATCH] x86/mm: avoid playing with directmap when self-snoop can be relied upon


  • To: Jan Beulich <jbeulich@xxxxxxxx>
  • From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Date: Wed, 21 Oct 2020 17:23:21 +0200
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  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
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On Tue, Oct 20, 2020 at 03:51:18PM +0200, Jan Beulich wrote:
> The set of systems affected by XSA-345 would have been smaller is we had
> this in place already: When the processor is capable of dealing with
> mismatched cacheability, there's no extra work we need to carry out.
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

I guess it's not worth using the alternative framework to patch this
up at boot in order to avoid the call in the first place?

Thanks, Roger.



 


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