[OASIS Issue Tracker] (VIRTIO-103) PCI Common configuration layout

Rusty Russell created VIRTIO-103:

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Summary: PCI Common configuration layout
Key: VIRTIO-103
URL:  https://tools.oasis-open.org/issues/browse/VIRTIO-103
Project: OASIS Virtual I/O Device (VIRTIO)

TC
Issue Type: Sub-task
Affects Versions: virtio 1.0 csprd01
Reporter: Rusty Russell
Assignee: Rusty Russell
4.1.2.1 Common Configuration structure layout  device_status  ?The spec states "? Writing 0 resets the device ?".  H ow does the driver know when its complete.  Proposal ?:? the resetting driver will poll this register for a non-zero value until the reset is complete after which DMA and interrupts will not occur.  queue_size  Is there a way to find the maximum queue size without resetting the whole device?  queue_enable  What happens to the state of the queue when queue_enable transitions from non-zero to zero?  queue_desc/queue_avail/queue_used?  Does a zero address indicate a disabled queue?  This is how current devices work but spec clarification would be useful.

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