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Virtio: Add CONFIG_VIRTIO_MMIO_POLL_RESET

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Add CONFIG_VIRTIO_MMIO_POLL_RESET to as an option to enable
synchronous reset for the MMIO based transport for virtio.

Change-Id: Ide5f69aa083bee2189f4d417d95f2c8fdf61bcdb
Signed-off-by: Jianguo Sun <quic_jianguos@quicinc.com>
This commit is contained in:
Jianguo Sun 2024-05-18 10:42:02 +08:00
parent a33e7a7ec9
commit f8d51a3599
1 changed files with 9 additions and 0 deletions
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9
drivers/virtio/Kconfig
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@ -194,4 +194,13 @@ config VIRTIO_DMA_SHARED_BUFFER
This option adds a flavor of dma buffers that are backed by
virtio resources.
config VIRTIO_MMIO_POLL_RESET
bool "Virti-mmio device synchronous reset support"
depends on VIRTIO_MMIO
help
Say y here to enable synchronous reset for the MMIO transport based
virtio device. After writing 0 to device_status, the driver must
wait for a read of device_status to return 0 before reinitializing
the device.
endif # VIRTIO_MENU