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| author |   Robin Murphy <robin.murphy@arm.com> | 2025-08-14 17:47:16 +0100 |
|---|---|---|
| committer |   Joerg Roedel <joerg.roedel@amd.com> | 2025-08-22 08:43:23 +0200 |
| commit | 72b6f7cd89cea8251979b65528d302f9c0ed37bf (patch) | |
| tree | 54386f086e2a4d61ad495443b6ab1376f16282d5 /tools/perf/scripts/python/Perf-Trace-Util/lib | |
| parent | iommu/arm-smmu-v3: Fix smmu_domain->nr_ats_masters decrement (diff) | |
| download | wireguard-linux-72b6f7cd89cea8251979b65528d302f9c0ed37bf.tar.xz wireguard-linux-72b6f7cd89cea8251979b65528d302f9c0ed37bf.zip | |
iommu/virtio: Make instance lookup robust
Much like arm-smmu in commit 7d835134d4e1 ("iommu/arm-smmu: Make
instance lookup robust"), virtio-iommu appears to have the same issue
where iommu_device_register() makes the IOMMU instance visible to other
API callers (including itself) straight away, but internally the
instance isn't ready to recognise itself for viommu_probe_device() to
work correctly until after viommu_probe() has returned. This matters a
lot more now that bus_iommu_probe() has the DT/VIOT knowledge to probe
client devices the way that was always intended. Tweak the lookup and
initialisation in much the same way as for arm-smmu, to ensure that what
we register is functional and ready to go.
Cc: stable@vger.kernel.org
Fixes: bcb81ac6ae3c ("iommu: Get DT/ACPI parsing into the proper probe path")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/308911aaa1f5be32a3a709996c7bd6cf71d30f33.1755190036.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib')
0 files changed, 0 insertions, 0 deletions