iommu/vt-d: Drop pasid requirement for prq initialization

PASID support within the IOMMU is not required to enable the Page
Request Queue, only the PRS capability.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Joel Granados <joel.granados@kernel.org>
Link: https://lore.kernel.org/r/20241015-jag-iopfv8-v4-5-b696ca89ba29@kernel.org
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 0ac4ce192baae5b8399f03ed087fa8360a4b0e25..74cf84e3e4e093e65c5fda9b3a54c004aa46751f 100644 (file)
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -1329,10 +1329,8 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
        /* free context mapping */
        free_context_table(iommu);
 
-       if (pasid_supported(iommu)) {
-               if (ecap_prs(iommu->ecap))
-                       intel_iommu_finish_prq(iommu);
-       }
+       if (ecap_prs(iommu->ecap))
+               intel_iommu_finish_prq(iommu);
 }
 
 /*
@@ -2192,7 +2190,7 @@ static int __init init_dmars(void)
 
                iommu_flush_write_buffer(iommu);
 
-               if (pasid_supported(iommu) && ecap_prs(iommu->ecap)) {
+               if (ecap_prs(iommu->ecap)) {
                        /*
                         * Call dmar_alloc_hwirq() with dmar_global_lock held,
                         * could cause possible lock race condition.
@@ -2616,7 +2614,7 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
        intel_iommu_init_qi(iommu);
        iommu_flush_write_buffer(iommu);
 
-       if (pasid_supported(iommu) && ecap_prs(iommu->ecap)) {
+       if (ecap_prs(iommu->ecap)) {
                ret = intel_iommu_enable_prq(iommu);
                if (ret)
                        goto disable_iommu;