| From: |
| Anirudh Rayabharam <anirudh-AT-anirudhrb.com> |
| To: |
| kys-AT-microsoft.com, haiyangz-AT-microsoft.com, wei.liu-AT-kernel.org, decui-AT-microsoft.com, longli-AT-microsoft.com, linux-hyperv-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org |
| Subject: |
| [PATCH v4 0/2] ARM64 support for doorbell and intercept SINTs |
| Date: |
| Wed, 11 Feb 2026 17:07:26 +0000 |
| Message-ID: |
| <20260211170728.3056226-1-anirudh@anirudhrb.com> |
| Cc: |
| anirudh-AT-anirudhrb.com |
| Archive-link: |
| Article |
From: "Anirudh Rayabharam (Microsoft)" <anirudh@anirudhrb.com>
On x86, the HYPERVISOR_CALLBACK_VECTOR is used to receive synthetic
interrupts (SINTs) from the hypervisor for doorbells and intercepts.
There is no such vector reserved for arm64.
On arm64, the hypervisor exposes a synthetic register that can be read
to find the INTID that should be used for SINTs. This INTID is in the
PPI range.
Changes in v4:
- Hypervisor now exposes a synthetic register to read the SINT vector
instead of using an ACPI platform device. So make changes to accomodate that.
Changes in v3:
- Moved the hv_root_partition() check into the reboot notifier
to avoid doing it multiple times.
v2: https://lore.kernel.org/linux-hyperv/20260202182706.64819...
Changes in v2:
Addressed review comments:
- Moved more stuff into mshv_synic.c
- Code simplifications
- Removed unnecessary debug prints
v1: https://lore.kernel.org/linux-hyperv/20260128160437.33421...
Anirudh Rayabharam (Microsoft) (2):
mshv: refactor synic init and cleanup
mshv: add arm64 support for doorbell & intercept SINTs
drivers/hv/mshv_root.h | 5 +-
drivers/hv/mshv_root_main.c | 59 ++----------
drivers/hv/mshv_synic.c | 181 +++++++++++++++++++++++++++++++++---
include/hyperv/hvgdk_mini.h | 2 +
4 files changed, 181 insertions(+), 66 deletions(-)
--
2.34.1
