This patch series improves reset support for vfio-platform:
- The first patch fixes a bug I ran into while working on this.
- The second patch implements generic DT reset controller support, for
devices that are connected to an SoC-internal reset controller and
can be reset in a generic way. This avoids having to write/change a
vfio-specific reset driver for each and every device to be
passed-through to a guest.
Changes compared to v1:
- Add Reviewed-by,
- Don't store error values in vdev->reset_control,
- Use of_reset_control_get_exclusive() instead of
- Improve description.
This has been tested on R-Car H3/Salvator-XS by exporting a GPIO module
to a QEMU+KWM guest: the GPIO module is reset before QEMU opens the vfio
device, and reset again after QEMU has released it, as can be witnessed
by the LEDs connected to the GPIOs.
Geert Uytterhoeven (2):
vfio: platform: Fix reset module leak in error path
vfio: platform: Add generic DT reset controller support
drivers/vfio/platform/vfio_platform_common.c | 41 ++++++++++++++++++++++-----
drivers/vfio/platform/vfio_platform_private.h | 1 +
2 files changed, 35 insertions(+), 7 deletions(-)
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
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