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Commit 4a3ab87a authored by Shiraz Hashim's avatar Shiraz Hashim Committed by Gerrit - the friendly Code Review server
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iommu/arm-smmu: Initialize smmu on first attach 



For slave side secure architecture, kernel need to call
into TZ to initialize smmu on first context bank attach.

Change-Id: Ib587275e7826e4264f4cf813cc2ec76b192ec9d1
Signed-off-by: default avatarShiraz Hashim <shashim@codeaurora.org>
Signed-off-by: default avatarCharan Teja Reddy <charante@codeaurora.org>
parent 99e7cd32

drivers/iommu/arm-smmu.c

+17 −0
Original line number Diff line number Diff line
@@ -1394,6 +1394,19 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev) 
	return IRQ_HANDLED;

}



static bool arm_smmu_master_attached(struct arm_smmu_device *smmu,

				     struct iommu_fwspec *fwspec)

{

	int i, idx;



	for_each_cfg_sme(fwspec, i, idx) {

		if (smmu->s2crs[idx].attach_count)

			return true;

	}



	return false;

}



static int arm_smmu_set_pt_format(struct arm_smmu_domain *smmu_domain,

				  struct io_pgtable_cfg *pgtbl_cfg)

{
@@ -1847,6 +1860,10 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain, 


	/* Publish page table ops for map/unmap */

	smmu_domain->pgtbl_ops = pgtbl_ops;

	if (arm_smmu_is_slave_side_secure(smmu_domain) &&

			!arm_smmu_master_attached(smmu, dev->iommu_fwspec))

		arm_smmu_restore_sec_cfg(smmu, cfg->cbndx);



	return 0;



out_clear_smmu: