@@ -501,11 +501,18 @@ static int idxd_probe(struct idxd_device *idxd)
dev_dbg(dev, "IDXD reset complete\n");
if (IS_ENABLED(CONFIG_INTEL_IDXD_SVM) && sva) {
- rc = idxd_enable_system_pasid(idxd);
- if (rc < 0)
- dev_warn(dev, "Failed to enable PASID. No SVA support: %d\n", rc);
- else
- set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
+ rc = iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA);
+ if (rc == 0) {
+ rc = idxd_enable_system_pasid(idxd);
+ if (rc < 0) {
+ iommu_dev_disable_feature(dev, IOMMU_DEV_FEAT_SVA);
+ dev_warn(dev, "Failed to enable PASID. No SVA support: %d\n", rc);
+ } else {
+ set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
+ }
+ } else {
+ dev_warn(dev, "Unable to turn on SVA feature.\n");
+ }
} else if (!sva) {
dev_warn(dev, "User forced SVA off via module param.\n");
}
@@ -539,6 +546,7 @@ static int idxd_probe(struct idxd_device *idxd)
err:
if (device_pasid_enabled(idxd))
idxd_disable_system_pasid(idxd);
+ iommu_dev_disable_feature(dev, IOMMU_DEV_FEAT_SVA);
return rc;
}
@@ -699,6 +707,7 @@ static void idxd_remove(struct pci_dev *pdev)
if (device_pasid_enabled(idxd))
idxd_disable_system_pasid(idxd);
idxd_unregister_devices(idxd);
+ iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_SVA);
}
static struct pci_driver idxd_pci_driver = {
Enable IOMMU_DEV_FEAT_SVA before attempt to bind pasid. This is needed according to iommu_sva_bind_device() comment. Currently Intel IOMMU code does this before bind call. It really needs to be controlled by the driver. Signed-off-by: Dave Jiang <dave.jiang@intel.com> --- drivers/dma/idxd/init.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)