Commit edd0351e authored by Jean-Philippe Brucker's avatar Jean-Philippe Brucker Committed by Will Deacon
Browse files

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: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 4ce8da45

drivers/iommu/arm-smmu-v3.c

+3 −2
Original line number Diff line number Diff line
@@ -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,

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