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Re: [PATCH v2] x86/pv: Inject #UD for missing SYSCALL callbacks

  • To: Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Wed, 14 Oct 2020 15:26:11 +0100
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  • Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Wei Liu <wl@xxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>
  • Delivery-date: Wed, 14 Oct 2020 14:34:09 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 14/10/2020 15:20, Manuel Bouyer wrote:
> On Wed, Oct 14, 2020 at 04:16:20PM +0200, Roger Pau Monné wrote:
>> [...]
>> Would this result in a regression for NetBSD then? Is it fine to see
>> #UD regardless of the platform? It's not clear to me from the text
>> above whether this change will cause issues with NetBSD.
> AFAIK this should not cause any issue. If I understand it properly,
> SYSCALL in a 32bit context would not work in any case on Intel CPUs.
> The patch just makes if fail on AMD cpus the same way it fails on Intel.





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