iommu/arm-smmu-v3: Batch context descriptor invalidation

Rather than publishing one command at a time when invalidating a context
descriptor, batch the commands for all SIDs in the domain.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index beeec366bc41e63a2f13bfe15e4db8d16131a1fc..12b2a0fa747e5373a41611d3dcd91b8c3bd89cb2 100644 (file)
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1512,6 +1512,7 @@ static void arm_smmu_sync_cd(struct arm_smmu_domain *smmu_domain,
        size_t i;
        unsigned long flags;
        struct arm_smmu_master *master;
+       struct arm_smmu_cmdq_batch cmds = {};
        struct arm_smmu_device *smmu = smmu_domain->smmu;
        struct arm_smmu_cmdq_ent cmd = {
                .opcode = CMDQ_OP_CFGI_CD,
@@ -1525,12 +1526,12 @@ static void arm_smmu_sync_cd(struct arm_smmu_domain *smmu_domain,
        list_for_each_entry(master, &smmu_domain->devices, domain_head) {
                for (i = 0; i < master->num_sids; i++) {
                        cmd.cfgi.sid = master->sids[i];
-                       arm_smmu_cmdq_issue_cmd(smmu, &cmd);
+                       arm_smmu_cmdq_batch_add(smmu, &cmds, &cmd);
                }
        }
        spin_unlock_irqrestore(&smmu_domain->devices_lock, flags);
 
-       arm_smmu_cmdq_issue_sync(smmu);
+       arm_smmu_cmdq_batch_submit(smmu, &cmds);
 }
 
 static int arm_smmu_alloc_cd_leaf_table(struct arm_smmu_device *smmu,