vfio: platform: call _RST method when using ACPI

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The device tree code checks for the presence of a reset driver and calls
the of_reset function pointer by looking up the reset driver as a module.

ACPI defines _RST method to perform device level reset. After the _RST
method is executed, the OS can resume using the device. _RST method is
expected to stop DMA transfers and IRQs.

This patch introduces two functions as vfio_platform_acpi_has_reset and
vfio_platform_acpi_call_reset. The has reset method is used to declare
reset capability via the ioctl flag VFIO_DEVICE_FLAGS_RESET. The call
reset function is used to execute the _RST ACPI method.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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Sinan Kaya 2016-07-19 09:01:46 -04:00 • committed by Alex Williamson

parent 5afec27474

commit d30daa33ec

1 changed files with 49 additions and 1 deletions

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drivers/vfio/platform/vfio_platform_common.c

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