From: joaopeixoto@osyx.tech
To: linux-kernel@vger.kernel.org
Cc: ajd@linux.ibm.com, alex@ghiti.fr, aou@eecs.berkeley.edu,
bagasdotme@gmail.com, catalin.marinas@arm.com,
conor+dt@kernel.org, corbet@lwn.net, dan.j.williams@intel.com,
davidmcerdeira@osyx.tech, devicetree@vger.kernel.org,
dev@kael-k.io, gregkh@linuxfoundation.org, haren@linux.ibm.com,
heiko@sntech.de, joaopeixoto@osyx.tech, jose@osyx.tech,
kever.yang@rock-chips.com, krzk+dt@kernel.org,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
linux-riscv@lists.infradead.org, maddy@linux.ibm.com,
mani@kernel.org, nathan@kernel.org, neil.armstrong@linaro.org,
palmer@dabbelt.com, pjw@kernel.org,
prabhakar.mahadev-lad.rj@bp.renesas.com, robh@kernel.org,
will@kernel.org
Subject: [PATCH v2 0/6] virt: Add Bao hypervisor IPC and I/O dispatcher drivers
Date: Wed, 7 Jan 2026 16:28:23 +0000 [thread overview]
Message-ID: <20260107162829.416885-1-joaopeixoto@osyx.tech> (raw)
In-Reply-To: <20251224135217.25350-1-joaopeixoto@osyx.tech>
From: João Peixoto <joaopeixoto@osyx.tech>
This series introduces support for Bao hypervisor guest-side drivers
under drivers/virt/bao, along with the associated Device Tree bindings,
UAPI headers, and MAINTAINERS entries.
Bao is a lightweight static-partitioning hypervisor for embedded and
safety-critical systems. This series adds:
- Bao IPC shared memory driver: Enables Linux guests to communicate
with each other via shared memory regions.
- Bao I/O Dispatcher driver: Allows Bao VMs to share I/O devices using
device paravirtualization (VirtIO).
Key updates in this version to align with upstream requirements:
1. Switched to misc device API: Removed all cdev, class, and
alloc_chrdev_region code in favor of misc_register() for simpler,
standard device management.
2. Clean kernel style and formatting: All code passes checkpatch.pl,
with consistent variable declaration, function naming, and comment style.
3. Architecture abstraction: Consolidated ARM, ARM64, and RISC-V hypercall
logic into architecture-specific headers, removing in-driver #ifdefs.
4. Commit messages: Now concise and Linux-kernel-style, describing
behavior and impact clearly.
5. Device Tree compliance: Fixed all make dt_binding_check errors to
ensure DT binding correctness.
This series has been validated on Linux guests running under Bao
hypervisor, confirming correct initialization, IPC shared-memory
read/write operations, and I/O Dispatcher functionality for
backend VMs.
Feedback and review from maintainers of virtualization,
architecture-specific code (ARM, ARM64, RISC-V), Device Tree
bindings, and UAPI are welcome.
João Peixoto (6):
dt-bindings: Add Bao IPC shared memory driver binding
virt: bao: Add Bao IPC shared memory driver
dt-bindings: Add Bao I/O dispatcher driver binding
virt: bao: Add Bao I/O dispatcher driver
virt: bao: Move BAO_IPCSHMEM_HYPERCALL_ID to common header
MAINTAINERS: Add entries for Bao hypervisor drivers, headers, and DT
bindings
.../bindings/bao/bao,io-dispatcher.yaml | 75 ++++
.../devicetree/bindings/bao/bao,ipcshmem.yaml | 82 ++++
.../devicetree/bindings/vendor-prefixes.yaml | 2 +
.../userspace-api/ioctl/ioctl-number.rst | 2 +
MAINTAINERS | 13 +
arch/arm/include/asm/bao.h | 60 +++
arch/arm64/include/asm/bao.h | 60 +++
arch/riscv/include/asm/bao.h | 60 +++
drivers/virt/Kconfig | 2 +
drivers/virt/Makefile | 2 +
drivers/virt/bao/Kconfig | 5 +
drivers/virt/bao/Makefile | 4 +
drivers/virt/bao/io-dispatcher/Kconfig | 15 +
drivers/virt/bao/io-dispatcher/Makefile | 4 +
drivers/virt/bao/io-dispatcher/bao_drv.h | 361 ++++++++++++++++
drivers/virt/bao/io-dispatcher/dm.c | 405 ++++++++++++++++++
drivers/virt/bao/io-dispatcher/driver.c | 185 ++++++++
drivers/virt/bao/io-dispatcher/intc.c | 64 +++
drivers/virt/bao/io-dispatcher/io_client.c | 405 ++++++++++++++++++
.../virt/bao/io-dispatcher/io_dispatcher.c | 179 ++++++++
drivers/virt/bao/io-dispatcher/ioeventfd.c | 323 ++++++++++++++
drivers/virt/bao/io-dispatcher/irqfd.c | 314 ++++++++++++++
drivers/virt/bao/ipcshmem/Kconfig | 8 +
drivers/virt/bao/ipcshmem/Makefile | 3 +
drivers/virt/bao/ipcshmem/ipcshmem.c | 252 +++++++++++
include/linux/bao.h | 44 ++
include/uapi/linux/bao.h | 98 +++++
27 files changed, 3027 insertions(+)
create mode 100644 Documentation/devicetree/bindings/bao/bao,io-dispatcher.yaml
create mode 100644 Documentation/devicetree/bindings/bao/bao,ipcshmem.yaml
create mode 100644 arch/arm/include/asm/bao.h
create mode 100644 arch/arm64/include/asm/bao.h
create mode 100644 arch/riscv/include/asm/bao.h
create mode 100644 drivers/virt/bao/Kconfig
create mode 100644 drivers/virt/bao/Makefile
create mode 100644 drivers/virt/bao/io-dispatcher/Kconfig
create mode 100644 drivers/virt/bao/io-dispatcher/Makefile
create mode 100644 drivers/virt/bao/io-dispatcher/bao_drv.h
create mode 100644 drivers/virt/bao/io-dispatcher/dm.c
create mode 100644 drivers/virt/bao/io-dispatcher/driver.c
create mode 100644 drivers/virt/bao/io-dispatcher/intc.c
create mode 100644 drivers/virt/bao/io-dispatcher/io_client.c
create mode 100644 drivers/virt/bao/io-dispatcher/io_dispatcher.c
create mode 100644 drivers/virt/bao/io-dispatcher/ioeventfd.c
create mode 100644 drivers/virt/bao/io-dispatcher/irqfd.c
create mode 100644 drivers/virt/bao/ipcshmem/Kconfig
create mode 100644 drivers/virt/bao/ipcshmem/Makefile
create mode 100644 drivers/virt/bao/ipcshmem/ipcshmem.c
create mode 100644 include/linux/bao.h
create mode 100644 include/uapi/linux/bao.h
--
2.43.0
next prev parent reply other threads:[~2026-01-07 16:29 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-24 13:52 [PATCH 0/5] virt: Add Bao hypervisor IPC and I/O dispatcher drivers joaopeixoto
2025-12-24 13:52 ` [PATCH 1/5] dt-bindings: Add Bao IPC shared memory driver binding joaopeixoto
2025-12-24 16:18 ` Rob Herring (Arm)
2025-12-25 8:57 ` Krzysztof Kozlowski
2025-12-24 13:52 ` [PATCH 2/5] virt: add Bao IPC shared memory driver joaopeixoto
2025-12-24 15:53 ` Greg KH
2025-12-24 15:54 ` Greg KH
2025-12-25 9:02 ` Krzysztof Kozlowski
2025-12-24 13:52 ` [PATCH 3/5] dt-bindings: Add Bao I/O dispatcher driver binding joaopeixoto
2025-12-24 16:18 ` Rob Herring (Arm)
2025-12-25 8:58 ` Krzysztof Kozlowski
2025-12-24 13:52 ` [PATCH 5/5] MAINTAINERS: Add entries for Bao hypervisor drivers, headers, and DT bindings joaopeixoto
2025-12-25 8:52 ` Krzysztof Kozlowski
2025-12-25 8:51 ` [PATCH 0/5] virt: Add Bao hypervisor IPC and I/O dispatcher drivers Krzysztof Kozlowski
[not found] ` <20251224135217.25350-5-joaopeixoto@osyx.tech>
2025-12-25 9:12 ` [PATCH 4/5] virt: add Bao I/O dispatcher driver Krzysztof Kozlowski
2026-01-07 16:28 ` joaopeixoto [this message]
2026-01-07 16:28 ` [PATCH 1/6] dt-bindings: Add Bao IPC shared memory driver binding joaopeixoto
2026-01-07 16:46 ` Krzysztof Kozlowski
2026-01-07 16:28 ` [PATCH 2/6] virt: bao: Add Bao IPC shared memory driver joaopeixoto
2026-01-07 18:54 ` Randy Dunlap
2026-01-14 20:37 ` Andrew Jones
2026-01-07 16:28 ` [PATCH 3/6] dt-bindings: Add Bao I/O dispatcher driver binding joaopeixoto
2026-01-07 16:47 ` Krzysztof Kozlowski
2026-01-07 16:28 ` [PATCH 4/6] virt: bao: Add Bao I/O dispatcher driver joaopeixoto
2026-01-14 20:32 ` Andrew Jones
2026-01-07 16:28 ` [PATCH 5/6] virt: bao: Move BAO_IPCSHMEM_HYPERCALL_ID to common header joaopeixoto
2026-01-07 19:36 ` Greg KH
2026-01-14 20:34 ` Andrew Jones
2026-01-07 16:28 ` [PATCH 6/6] MAINTAINERS: Add entries for Bao hypervisor drivers, headers, and DT bindings joaopeixoto
2026-01-07 19:37 ` [PATCH v2 0/6] virt: Add Bao hypervisor IPC and I/O dispatcher drivers Greg KH
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