diff options
| -rw-r--r-- | virtio-v1.0-wd01-part1-specification.txt | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/virtio-v1.0-wd01-part1-specification.txt b/virtio-v1.0-wd01-part1-specification.txt index 734bbf4..2d7a0fe 100644 --- a/virtio-v1.0-wd01-part1-specification.txt +++ b/virtio-v1.0-wd01-part1-specification.txt @@ -798,10 +798,18 @@ supported by the device. The Subsystem Vendor ID should reflect the PCI Vendor ID of the environment (it's currently only used for informational purposes by the guest). +All Drivers must match devices with any Revision ID, this +is to allow devices to be versioned without breaking drivers. + 2.3.1.1.1 Legacy Interfaces: A Note on PCI Device Discovery ------------------------- -Transitional devices must also have a Revision ID of 0 to match -this specification. +Transitional devices must have a Revision ID of 0 to match +legacy drivers. + +Non-transitional devices must have a Revision ID of 1 or higher. + +Both transitional and non-transitional drivers must match +any Revision ID value. 2.3.1.2. PCI Device Layout ------------------------- |