diff options
| author | mstsirkin <mstsirkin@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2013-09-30 06:04:10 +0000 |
|---|---|---|
| committer | mstsirkin <mstsirkin@0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652> | 2013-09-30 06:04:10 +0000 |
| commit | f9548545a3ec6ce0cf85adbd7fbb4eeab9d23348 (patch) | |
| tree | cc48df759ab8a060f6ab041bcf064914fa1ef5d9 /virtio-v1.0-wd01-part1-specification.txt | |
| parent | bec2c195f829ff5e7a0e741ca254a2bf8a89fcbb (diff) | |
pci: new layout: move footnote
Legacy footnotes belong directly within text.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@47 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
Diffstat (limited to 'virtio-v1.0-wd01-part1-specification.txt')
| -rw-r--r-- | virtio-v1.0-wd01-part1-specification.txt | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/virtio-v1.0-wd01-part1-specification.txt b/virtio-v1.0-wd01-part1-specification.txt index f8751ad..d65e8f2 100644 --- a/virtio-v1.0-wd01-part1-specification.txt +++ b/virtio-v1.0-wd01-part1-specification.txt @@ -858,7 +858,7 @@ When used through the legacy interface, the virtio header looks as follows: If MSI-X is enabled for the device, two additional fields -immediately follow this header:[5] +immediately follow this header: +------------++----------------+--------+ @@ -871,6 +871,12 @@ immediately follow this header:[5] | (MSI-X) || Vector | Vector | +------------++----------------+--------+ +Note: When MSI-X capability is enabled, device specific configuration starts at +byte offset 24 in virtio header structure. When MSI-X capability is not +enabled, device specific configuration starts at byte offset 20 in virtio +header. ie. once you enable MSI-X on the device, the other fields move. +If you turn it off again, they move back! + Immediately following these general headers, there may be device-specific headers: @@ -3388,12 +3394,6 @@ the non-PCI implementations (currently lguest and S/390). This is only allowed if the driver does not use any features which would alter this early use of the device. -[5] When MSI-X capability is enabled, device specific configuration starts at -byte offset 24 in virtio header structure. When MSI-X capability is not -enabled, device specific configuration starts at byte offset 20 in virtio -header. ie. once you enable MSI-X on the device, the other fields move. -If you turn it off again, they move back! - [6] The 4096 is based on the x86 page size, but it's also large enough to ensure that the separate parts of the virtqueue are on separate cache lines. |