Bug 1549597

Summary: Add support in virtio-balloon Windows driver for VIRTIO_F_IOMMU_PLATFORM virtio feature
Product: Red Hat Enterprise Linux 8 Reporter: Yvugenfi <yvugenfi>
Component: virtio-winAssignee: Yvugenfi <yvugenfi>
virtio-win sub component: virtio-win-prewhql QA Contact: xiagao
Status: CLOSED ERRATA Docs Contact:
Severity: low    
Priority: low CC: ailan, jinzhao, knoel, lijin, lmiksik
Version: 8.0Keywords: FutureFeature
Target Milestone: rc   
Target Release: 8.0   
Hardware: Unspecified   
OS: Windows   
Whiteboard:
Fixed In Version: virtio-win-prewhql-0.1-174 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-04-28 16:05:15 UTC Type: Feature Request
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1682882    
Bug Blocks: 1549577, 1558351    

Description Yvugenfi@redhat.com 2018-02-27 13:30:41 UTC
Description of problem:
virtio-win drivers are not reporting VIRTIO_F_IOMMU_PLATFORM feature.

There are several things that should be done to fix it:

1. Ensure that Windows drivers are using Windows kernel DMA (easier for storage and network drivers that are already using framework specific APIs, additional work should be done for WDF based drivers).

2. Report the feature.

Version-Release number of selected component (if applicable):


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Comment 4 Yvugenfi@redhat.com 2019-12-11 12:59:02 UTC
Changes are in: https://github.com/virtio-win/kvm-guest-drivers-windows/pull/418

Comment 7 xiagao 2019-12-16 05:47:02 UTC
Verify this bug with virtio-win-prewhql-174.

Boot up guest with ',iommu_platform=on,ats=on' for virtio-balloon-pci device,driver is installed successfully and virito-balloon device works well.

Comment 13 errata-xmlrpc 2020-04-28 16:05:15 UTC
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.

https://access.redhat.com/errata/RHEA-2020:1757