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Re: [PATCH v2 2/2] x86/time: prefer CMOS over EFI_GET_TIME


  • To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Mon, 2 Sep 2024 10:56:03 +0200
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  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Delivery-date: Mon, 02 Sep 2024 08:56:04 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 02.09.2024 10:45, Roger Pau Monné wrote:
> Is #PF the only fault that we can expect from EFI_GET_TIME?  That's
> what I've seen on some of the systems, but I wouldn't for example
> discard #GP or #UD as also possible outcomes?

I've definitely seen #GP in stack traces. What I can't say for sure is
whether those were _only_ because of our originally wrong stack
alignment, when firmware code wants to use XMM registers.

Jan




 


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