Re: [PATCH v1 0/4] Implement CPU hotplug on Arm

[Julien Grall <julien@xxxxxxx>]

Hi Grygorii,

On 23/09/2025 17:09, Grygorii Strashko wrote:
> On 18.09.25 15:16, Mykyta Poturai wrote:
> > This series implements support for CPU hotplug/unplug on Arm. To 
> > achieve this,
> > several things need to be done:
> >
> > 1. XEN_SYSCTL_CPU_HOTPLUG_* calls implemented.
> > 2. timer and GIC maintenance interrupts switched to static irqactions 
> > to remove
> > the need for freeing them during release_irq.
> > 3. Enabled the build of xen-hptool on Arm.
> >
> > Tested on QEMU.
> >
> > Mykyta Poturai (4):
> >    arm/time: Use static irqaction
> >    arm/gic: Use static irqaction
> >    arm/sysctl: Implement cpu hotplug ops
> >    tools: Allow building xen-hptool without CONFIG_MIGRATE
> >
> >   config/arm64.mk                  |  1 +
> >   config/x86_32.mk                 |  1 +
> >   config/x86_64.mk                 |  1 +
> >   tools/libs/guest/Makefile.common |  4 +-
> >   tools/misc/Makefile              |  2 +-
> >   xen/arch/arm/gic.c               | 10 ++++-
> >   xen/arch/arm/sysctl.c            | 67 ++++++++++++++++++++++++++++++++
> >   xen/arch/arm/time.c              | 20 ++++++++--
> >   8 files changed, 98 insertions(+), 8 deletions(-)
> Hence you introducing new feature for ARM I'd very much appreciated if you
> add corresponding documentation under docs/hypervisor-guide/arm/.
I think some documentation is good. But why does this need to be Arm 
specific?
Cheers,

--
Julien Grall