Hello,

This patchset adds toolstack support for I2C and GPIO virtio devices. This is
inspired from the work done by Oleksandr for the Disk device.

This is developed as part of Linaro's Project Stratos, where we are working
towards Hypervisor agnostic Rust based backend [1].

This is based of origin/staging (commit 01ca29f0b17a ("sched: dom0_vcpus_pin
should only affect dom0")) which already has Oleksandr's patches applied.

V3->V4:
- Update virtio_enabled independently of all devices, so we don't miss setting
  it to true.

- Add iommu handling for i2c/gpio and move it as part of
  make_virtio_mmio_node_common(), which gets backend_domid parameter as a
  result.

V2->V3:
- Rebased over latest tree and made changes according to changes in Oleksandr's
  patches from sometime back.
- Minor cleanups.

V1->V2:
- Patches 3/6 and 4/6 are new.
- Patches 5/6 and 6/6 updated based on the above two patches.
- Added link to the bindings for I2C and GPIO.
- Rebased over latest master branch.


Thanks.

--
Viresh

[1] https://lore.kernel.org/xen-devel/20220414092358.kepxbmnrtycz7mhe@vireshk-i7/

Viresh Kumar (6):
  libxl: Add support for Virtio I2C device
  libxl: Add support for Virtio GPIO device
  libxl: arm: Create alloc_virtio_mmio_params()
  libxl: arm: Split make_virtio_mmio_node()
  libxl: Allocate MMIO params for I2c device and update DT
  libxl: Allocate MMIO params for GPIO device and update DT

 tools/golang/xenlight/helpers.gen.go      | 212 ++++++++++++++++++++
 tools/golang/xenlight/types.gen.go        |  54 ++++++
 tools/include/libxl.h                     |  64 ++++++
 tools/include/libxl_utils.h               |   6 +
 tools/libs/light/Makefile                 |   2 +
 tools/libs/light/libxl_arm.c              | 166 +++++++++++++---
 tools/libs/light/libxl_create.c           |  26 +++
 tools/libs/light/libxl_dm.c               |  34 +++-
 tools/libs/light/libxl_gpio.c             | 226 ++++++++++++++++++++++
 tools/libs/light/libxl_i2c.c              | 226 ++++++++++++++++++++++
 tools/libs/light/libxl_internal.h         |   2 +
 tools/libs/light/libxl_types.idl          |  48 +++++
 tools/libs/light/libxl_types_internal.idl |   2 +
 tools/ocaml/libs/xl/genwrap.py            |   2 +
 tools/ocaml/libs/xl/xenlight_stubs.c      |   2 +
 tools/xl/Makefile                         |   2 +-
 tools/xl/xl.h                             |   6 +
 tools/xl/xl_cmdtable.c                    |  30 +++
 tools/xl/xl_gpio.c                        | 142 ++++++++++++++
 tools/xl/xl_i2c.c                         | 142 ++++++++++++++
 tools/xl/xl_parse.c                       | 160 +++++++++++++++
 tools/xl/xl_parse.h                       |   2 +
 tools/xl/xl_sxp.c                         |   4 +
 23 files changed, 1530 insertions(+), 30 deletions(-)
 create mode 100644 tools/libs/light/libxl_gpio.c
 create mode 100644 tools/libs/light/libxl_i2c.c
 create mode 100644 tools/xl/xl_gpio.c
 create mode 100644 tools/xl/xl_i2c.c

-- 
2.31.1.272.g89b43f80a514

On 09-08-22, 11:04, Viresh Kumar wrote:
> Hello,
> 
> This patchset adds toolstack support for I2C and GPIO virtio devices. This is
> inspired from the work done by Oleksandr for the Disk device.
> 
> This is developed as part of Linaro's Project Stratos, where we are working
> towards Hypervisor agnostic Rust based backend [1].
> 
> This is based of origin/staging (commit 01ca29f0b17a ("sched: dom0_vcpus_pin
> should only affect dom0")) which already has Oleksandr's patches applied.
> 
> V3->V4:
> - Update virtio_enabled independently of all devices, so we don't miss setting
>   it to true.
> 
> - Add iommu handling for i2c/gpio and move it as part of
>   make_virtio_mmio_node_common(), which gets backend_domid parameter as a
>   result.

Hi Anthony / Juergen,

Do you have any feedback for me on these patches ? It would be very
helpful to know if I am on the right track or not.

Thanks.

-- 
viresh