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IOMMU/PCI: respect device specifics
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 15 Sep 2021 11:10:07 +0200
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- Cc: Paul Durrant <paul@xxxxxxx>, Kevin Tian <kevin.tian@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Delivery-date: Wed, 15 Sep 2021 09:10:23 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
While making the first change here it occurred to me that the recent
vPCI-related discussion about hidden devices has some relevance also
elsewhere. In the course I then came to also notice a phantom device
related quirk.
1: VT-d: defer "no DRHD" check when (un)mapping devices
2: VT-d: consider hidden devices when unmapping
3: VT-d: skip IOMMU bitmap cleanup for phantom devices
4: AMD/IOMMU: consider hidden devices when flushing device I/O TLBs
Jan
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