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[PATCH v3 0/5] Implement CPU hotplug on Arm
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>
- Date: Fri, 10 Oct 2025 09:21:50 +0000
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- Cc: Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Fri, 10 Oct 2025 09:22:01 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHcOcdPI3ki3mxsgkWwwomwd2VOcg==
- Thread-topic: [PATCH v3 0/5] Implement CPU hotplug on Arm
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.
v2->v3:
* add docs
v1->v2:
* see individual patches
Mykyta Poturai (5):
arm/time: Use static irqaction
arm/gic: Use static irqaction
arm/sysctl: Implement cpu hotplug ops
tools: Allow building xen-hptool without CONFIG_MIGRATE
docs: Document CPU hotplug
config/Tools.mk.in | 1 +
docs/misc/cpu-hotplug.txt | 51 ++++++++++++++++++++++++++++++++
tools/configure | 30 +++++++++++++++++++
tools/configure.ac | 1 +
tools/libs/guest/Makefile.common | 4 +++
tools/misc/Makefile | 2 +-
xen/arch/arm/gic.c | 11 +++++--
xen/arch/arm/sysctl.c | 45 ++++++++++++++++++++++++++++
xen/arch/arm/time.c | 21 ++++++++++---
9 files changed, 159 insertions(+), 7 deletions(-)
create mode 100644 docs/misc/cpu-hotplug.txt
mode change 100755 => 100644 tools/configure
--
2.34.1
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