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Bug 908725 - virtio win inf does not specify revision ID
virtio win inf does not specify revision ID
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: virtio-win (Show other bugs)
6.4
Unspecified Unspecified
unspecified Severity unspecified
: rc
: ---
Assigned To: Vadim Rozenfeld
Virtualization Bugs
:
Depends On:
Blocks:
  Show dependency tree / graph
 
Reported: 2013-02-07 06:46 EST by Michael S. Tsirkin
Modified: 2013-11-21 19:03 EST (History)
8 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Cause: inf files come without explicit specification of revision ID. Consequence: perfectly fine from Windows point of view but violates some virtio spec requirements. Fix: add revision id to inf files. Result: inf files explicitly specify revision id as part of HW identification string.
Story Points: ---
Clone Of:
Environment:
Last Closed: 2013-11-21 19:03:29 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2013:1729 normal SHIPPED_LIVE virtio-win bug fix and enhancement update 2013-11-20 19:39:25 EST

  None (edit)
Description Michael S. Tsirkin 2013-02-07 06:46:59 EST 
Description of problem:
virtio spec says that drivers should not bind to devices unless
revision ID is 0x0.

virtio-win drivers violate this spec, which will create
backwards compatibility problems down the road.

Version-Release number of selected component (if applicable):
WHQL version from 6.4

How reproducible:
always

Steps to Reproduce:
1. open qemu source, edit hw/virtio-pci.c, change
      revision from VIRTIO_PCI_ABI_VERSION to 0x1.
2. start windows guest with any virtio devices besides baloon,
   and with virtio drivers loaded

  
Actual results:
guest driver loads

Expected results:
driver should not load, should prompt with no driver found dialog

Additional info:
Comment 4 Mike Cao 2013-03-29 02:55:49 EDT 
Pls show me how to verify it ,Will something be added in XXX.inf ?
Comment 5 Vadim Rozenfeld 2013-03-29 03:33:36 EDT 
(In reply to comment #4)
> Pls show me how to verify it ,Will something be added in XXX.inf ?

yes, it's in INFs

For example for virtio-scsi inf specifies the full
HW id string as:
%RHELScsi.DeviceDesc% = rhelscsi_inst, PCI\VEN_1AF4&DEV_1004&SUBSYS_00081AF4&REV_00

where the last 7 symbols ('REV_00') is the revision ID.
Comment 13 errata-xmlrpc 2013-11-21 19:03:29 EST 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-1729.html
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