linux-kernel - [PATCH 0/2] ARM64 support for doorbell and intercept SINTs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20260128160437.3342167-1-anirudh@anirudhrb.com>
Date: Wed, 28 Jan 2026 16:04:35 +0000
From: Anirudh Rayabharam <anirudh@...rudhrb.com>
To: kys@...rosoft.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	longli@...rosoft.com,
	linux-hyperv@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: anirudh@...rudhrb.com
Subject: [PATCH 0/2] ARM64 support for doorbell and intercept SINTs

From: "Anirudh Rayabharam (Microsoft)" <anirudh@...rudhrb.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 INTID for SINTs should be in the SGI or PPI range. The
hypervisor exposes a virtual device in the ACPI that reserves a
PPI for this use. Introduce a platform_driver that binds to this ACPI
device and obtains the interrupt vector that can be used for SINTs.

Anirudh Rayabharam (Microsoft) (2):
  mshv: rename synic per-cpu init/cleanup functions
  mshv: add arm64 support for doorbell & intercept SINTs

 drivers/hv/mshv_root.h      |   6 +-
 drivers/hv/mshv_root_main.c |  15 +++-
 drivers/hv/mshv_synic.c     | 156 ++++++++++++++++++++++++++++++++++--
 3 files changed, 164 insertions(+), 13 deletions(-)

-- 
2.34.1