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Re: [PATCH v1 0/4] Implement CPU hotplug on Arm
- To: Julien Grall <julien@xxxxxxx>, Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Grygorii Strashko <grygorii_strashko@xxxxxxxx>
- Date: Thu, 25 Sep 2025 11:45:54 +0300
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>
- Delivery-date: Thu, 25 Sep 2025 08:46:24 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 23.09.25 21:38, Julien Grall wrote:
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?
Only because this series is for ARM, if it could be generic (at least
partially) - even better.
--
Best regards,
-grygorii
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