Hi all,
This patch series allows to export generic devices in DT using
vfio-platform, providing direct access from a QEMU+KVM guest to the
exported devices.
- Patches 1-2 (submitted before by Eric Auger) make the vfio-platform
device non-abstract, incl. matching using a compatible string.
- Patch 3 allows dynamic sysbus devices again, without needing to
create device-specific vfio types for each and every new device.
- Patch 4 adds code to instantiate device nodes for generic DT
devices, copying a set of generic properties from the host.
This avoids having to write device-specific instantation methods for
each and every "simple" device using only a set of generic properties.
Devices that need more specialized handling can still provide their own
instantation method.
Changes compared to v2 (not submitted to the mailing list):
- Use the compatible values from sysfs instead of user-supplied
manufacturer and model options,
- Replace "hw/arm/sysbus-fdt: Enable rcar-gen3-gpio dynamic
instatiation" by generic "hw/arm/sysbus-fdt: Add support for
instantiating generic devices",
- Reword patch descriptions,
- Drop RFC state,
- Drop "vfio: No-IOMMU mode support".
Changes compared to v1 ("R-Car Gen3 GPIO Pass-Through Prototype (QEMU)",
https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg02716.html):
- Restrict dynamic sysbus devices to TYPE_VFIO_PLATFORM, as suggested
by Eric Auger.
For proper operation, this depends on "hw/arm/sysbus-fdt: Fix assertion
in copy_properties_from_host()"
(https://lists.gnu.org/archive/html/qemu-devel/2018-07/msg04922.html).
Thanks!
For testing, this patch series and all prerequisites are available in
the topic/rcar3-virt-gpio-passthrough-v3 branch of my git repository at
https://github.com/geertu/qemu.git.
This has been tested on a Renesas Salvator-XS board with R-Car H3 ES2.0
with SATA:
-device vfio-platform,host=ee300000.sata
and GPIO (needs VFIO No-IOMMU support):
-device vfio-platform,host=e6055400.gpio
Thanks!
Auger Eric (2):
vfio/platform: Make the vfio-platform device non-abstract
hw/arm/sysbus-fdt: Allow device matching with DT compatible value
Geert Uytterhoeven (2):
hw/arm/virt: Allow dynamic sysbus devices again
hw/arm/sysbus-fdt: Add support for instantiating generic devices
hw/arm/sysbus-fdt.c | 163 +++++++++++++++++++++++++++++---
hw/arm/virt.c | 1 +
hw/vfio/amd-xgbe.c | 1 +
hw/vfio/calxeda-xgmac.c | 1 +
hw/vfio/platform.c | 22 ++++-
include/hw/vfio/vfio-platform.h | 3 +-
6 files changed, 175 insertions(+), 16 deletions(-)
--
2.17.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
