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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2023-08-09 15:47:58 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-08-09 18:44:37 +0300 |
| commit | 154786235d0156ddce9575f13e23f3169e688435 (patch) | |
| tree | b897ce29b0b28f73590e25d46d3e9fa82bb0ef42 /drivers/iommu/intel/iommu.c | |
| parent | b61701881f2ff809e9cd229f129bdc4e09ca688e (diff) | |
| download | linux-154786235d0156ddce9575f13e23f3169e688435.tar.xz | |
iommu/vt-d: Make prq draining code generic
Currently draining page requests and responses for a pasid is part of SVA
implementation. This is because the driver only supports attaching an SVA
domain to a device pasid. As we are about to support attaching other types
of domains to a device pasid, the prq draining code becomes generic.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20230802212427.1497170-6-jacob.jun.pan@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel/iommu.c')
| -rw-r--r-- | drivers/iommu/intel/iommu.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index ecb7e44377a8..574021c36db5 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4727,21 +4727,29 @@ static void intel_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid) struct intel_iommu *iommu = device_to_iommu(dev, NULL, NULL); struct iommu_domain *domain; - /* Domain type specific cleanup: */ domain = iommu_get_domain_for_dev_pasid(dev, pasid, 0); - if (domain) { - switch (domain->type) { - case IOMMU_DOMAIN_SVA: - intel_svm_remove_dev_pasid(dev, pasid); - break; - default: - /* should never reach here */ - WARN_ON(1); - break; - } + if (WARN_ON_ONCE(!domain)) + goto out_tear_down; + + /* + * The SVA implementation needs to handle its own stuffs like the mm + * notification. Before consolidating that code into iommu core, let + * the intel sva code handle it. + */ + if (domain->type == IOMMU_DOMAIN_SVA) { + intel_svm_remove_dev_pasid(dev, pasid); + goto out_tear_down; } + /* + * Should never reach here until we add support for attaching + * non-SVA domain to a pasid. + */ + WARN_ON(1); + +out_tear_down: intel_pasid_tear_down_entry(iommu, dev, pasid, false); + intel_drain_pasid_prq(dev, pasid); } const struct iommu_ops intel_iommu_ops = { |