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[PATCH 0/6] VT-d: domain ID mapping improvements
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 12 Nov 2021 10:46:48 +0100
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- Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
- Delivery-date: Fri, 12 Nov 2021 09:47:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Two bug fixes, some cleanup, and a simplification for modern hardware.
1: properly reserve DID 0 for caching mode IOMMUs
2: split domid map cleanup check into a function
3: don't leak domid mapping on error path
4: tidy domid map handling
5: introduce helper to convert DID to domid_t
6: avoid allocating domid_{bit,}map[] when possible
This depends on the previously submitted (and already approved, except
for a possible release ack) "VT-d: per-domain IOMMU bitmap needs to
have dynamic size".
Jan
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