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virtio-devices: Removing all mappings found in an unmap request

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According to the virtio iommu spec (section 5.13.6.6), all mappings
within the entire range from virt_start to virt_end in an unmap
request must be removed. This change adds this functionality,
iterating through all mappings that fall within an unmap request
for that domain and removing them.

Signed-off-by: Andrew Carp <acarp@crusoeenergy.com>
This commit is contained in:
Andrew Carp 2024-03-21 12:21:34 -07:00 committed by Bo Chen
parent 6bee8ac702
commit fbdc5d4487
1 changed files with 2 additions and 2 deletions
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4
virtio-devices/src/iommu.rs
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@ -563,7 +563,7 @@ impl Request {
} }
} }
// Remove mapping associated with the domain // Remove all mappings associated with the domain within the requested range
mapping mapping
.domains .domains
.write() .write()
@ -571,7 +571,7 @@ impl Request {
.get_mut(&domain_id) .get_mut(&domain_id)
.unwrap() .unwrap()
.mappings .mappings
.remove(&virt_start); .retain(|&x, _| (x < req.virt_start || x > req.virt_end));
} }
VIRTIO_IOMMU_T_PROBE => { VIRTIO_IOMMU_T_PROBE => {
if desc_size_left != size_of::<VirtioIommuReqProbe>() { if desc_size_left != size_of::<VirtioIommuReqProbe>() {