Re: [Xen-devel] [PATCH linux v2 0/9] xen: pvhvm: support bootup on secondary vCPUs
From: David Vrabel
Date: Mon Jul 25 2016 - 08:38:42 EST
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.