Re: [Xen-devel] [PATCH linux v2 0/9] xen: pvhvm: support bootup on secondary vCPUs

[David Vrabel <david.vrabel@citrix.com>]

On 25/07/16 14:17, Julien Grall wrote:
> Hi David,
> 
> On 25/07/16 13:38, David Vrabel wrote:
>> On 30/06/16 16:56, Vitaly Kuznetsov wrote:
>>> It may happen that Xen's and Linux's ideas of vCPU id diverge. In
>>> particular, when we crash on a secondary vCPU we may want to do kdump
>>> and unlike plain kexec where we do migrate_to_reboot_cpu() we try
>>> booting
>>> on the vCPU which crashed. This doesn't work very well for PVHVM
>>> guests as
>>> we have a number of hypercalls where we pass vCPU id as a parameter.
>>> These
>>> hypercalls either fail or do something unexpected. To solve the issue we
>>> need to have a mapping between Linux's and Xen's vCPU ids.
>>>
>>> This series solves the issue for x86 PVHVM guests. PV guests don't (and
>>> probably won't) support kdump so I always assume Xen's vCPU id ==
>>> Linux's
>>> vCPU id. ARM guests will probably need to get proper mapping once we
>>> start
>>> supporting kexec/kdump there.
>>
>> Applied to for-linus-4.8, thanks.
> 
> It would have been nice to send a ping before applying. This patch
> series is containing Xen ARM code which has not been acked by Stefano,
> nor had feedback from ARM side.

The ARM parts are trivial and such a small part of this series, I saw no
need to wait.

David