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virtio-devices: Map previously attached endpoints

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Ensures that any endpoints already attached to the domain are properly
mapped to a new endpoint on said endpoint's attach request. This is done
by search for all previous mappings in the domain and then issuing map
requests for the newly attached endpoint.

Signed-off-by: Andrew Carp <acarp@crusoeenergy.com>
This commit is contained in:
Andrew Carp 2024-03-21 16:22:31 -07:00 committed by Rob Bradford
parent 045964deee
commit 5668f02eb6
1 changed files with 13 additions and 0 deletions
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13
virtio-devices/src/iommu.rs
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@ -414,6 +414,19 @@ impl Request {
.unwrap()
.insert(endpoint, domain_id);
// If any other mappings exist in the domain for other containers,
// make sure to issue these mappings for the new endpoint/container
if let Some(domain_mappings) = &mapping.domains.read().unwrap().get(&domain_id)
{
if let Some(ext_map) = ext_mapping.get(&endpoint) {
for (virt_start, addr_map) in &domain_mappings.mappings {
ext_map
.map(*virt_start, addr_map.gpa, addr_map.size)
.map_err(Error::ExternalUnmapping)?;
}
}
}
// Add new domain with no mapping if the entry didn't exist yet
let mut domains = mapping.domains.write().unwrap();
let domain = Domain {