Re: [Xen-devel] [xen-4.13.0-rc] kexec/kdump failure with cpu Intel(R) Xeon(R) Gold 6242 CPU

[Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>]

On 12/11/2019 11:38, Dietmar Hahn wrote:
> Hi,
> 
> on a new machine with cpu Intel(R) Xeon(R) Gold 6242 CPU the kexec/kdump
> doesn't work with current xen-4.13.0-rc.
> The last output of the xen console is:
> 
> (XEN) Hardware Dom0 crashed: Executing kexec image on cpu5
> (XEN) Shot down all CPUs
> 
> After short delay the system reboots.
> 
> It seems the fixes mentioned in the thread
> https://lists.xenproject.org/archives/html/xen-devel/2019-10/msg01948.html
> aren't enough.
> 
> I built xen-4.11 with the patches but no success.
> On an older system with xen-4.4 the kdump works.

For 4.11 you need this fix as well: 12c36f577d45 ("iommu: leave IOMMU
enabled by default during kexec crash transition"). I'm pretty certain
xen-4.4 wouldn't work on your new system as well.

Igor

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