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Re: [Xen-devel] [PATCH] x86/suspend: Don't save/restore %cr8
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <JBeulich@xxxxxxxx>
- Date: Tue, 16 Jul 2019 07:03:03 +0000
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- Cc: Juergen Gross <JGross@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Tue, 16 Jul 2019 07:05:36 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH] x86/suspend: Don't save/restore %cr8
On 15.07.2019 19:10, Andrew Cooper wrote:
> %cr8 is an alias of APIC_TASKPRI, which is handled by
> lapic_{suspend,resume}() with the rest of the Local APIC state. Saving
> and restoring the TPR state in isolation is not a clever idea.
>
> Drop it all.
>
> While editing wakeup_prot.S, trim its include list to just the headers
> which are used, which is precicely none of them.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
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