Re: [PATCH for-4.20 v3 0/5] xen/x86: prevent local APIC errors at shutdown

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Tue, Feb 11, 2025 at 12:02:04PM +0100, Roger Pau Monne wrote:
> Hello,
> 
> The following series aims to prevent local APIC errors from stalling the
> shtudown process.  On XenServer testing we have seen reports of AMD
> boxes sporadically getting stuck in a spam of:
> 
> APIC error on CPU0: 00(08), Receive accept error
> 
> Messages during shutdown, as a result of device interrupts targeting
> CPUs that are offline (and have the local APIC disabled).
> 
> First patch strictly solves the issue of shutdown getting stuck, further
> patches aim to quiesce interrupts from all devices (known by Xen) as an
> attempt to prevent a spurious "APIC error on CPU0: 00(00)" plus also
> make kexec more reliable.
> 
> Thanks, Roger.
> 
> Roger Pau Monne (5):
>   x86/shutdown: offline APs with interrupts disabled on all CPUs
>   x86/irq: drop fixup_irqs() parameters
>   x86/smp: perform disabling on interrupts ahead of AP shutdown
>   x86/pci: disable MSI(-X) on all devices at shutdown
>   x86/iommu: disable interrupts at shutdown

This is now fully reviewed, can I get your opinion (and
release-acked-by) on which patches we should take for 4.20?

Thanks, Roger.