diff options
| author | rusty <rusty@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2014-03-03 01:56:32 +0000 |
|---|---|---|
| committer | rusty <rusty@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2014-03-03 01:56:32 +0000 |
| commit | 1bf79ad447c726af521961c55561bcfeed95618b (patch) | |
| tree | 66423ce01198599f974716272e5217e076fb2ec6 | |
| parent | 64d4d1a8d09fff84b5de6cc30eda359ba5275faf (diff) | |
PCI: Tighten requirements.
1) make it clear that queue_enable is 0 on reset.
2) device MUST present a VIRTIO_PCI_CAP_DEVICE_CFG if needed for type.
Signed-off-by: Rusty Russell <rusty@au1.ibm.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@308 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
| -rw-r--r-- | content.tex | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/content.tex b/content.tex index b0876b5..f265172 100644 --- a/content.tex +++ b/content.tex @@ -1231,6 +1231,8 @@ configuration, increment \field{config_generation} and clear the flag. The device MUST reset when 0 is written to \field{device_status}. +The device MUST present a 0 in \field{queue_enable} on reset. + The device MUST present a 0 in \field{queue_size} if the virtqueue corresponding to the current \field{queue_select} is unavailable. @@ -1335,8 +1337,8 @@ is enabled. \subsubsection{Device specific structure}\label{sec:Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Device specific structure} -The device MAY present at least one VIRTIO_PCI_CAP_DEVICE_CFG capability (some -devices may not have any device specific structure). +The device MUST present at least one VIRTIO_PCI_CAP_DEVICE_CFG capability for +any device type which has a device specific structure. \devicenormative{\paragraph}{Device specific structure}{Virtio Transport Options / Virtio Over PCI Bus / PCI Device Layout / Device specific structure} |