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Commit 5ac11cac authored by Suresh Vankadara's avatar Suresh Vankadara
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msm: camera: smmu: Use force guard page for IPE 



IPE hardware access the address beyond allocation
leads to SMMU page fault.

Use extra guard page to avoid this issue.

Change-Id: Ifcf4d46e1c6f9b2fc3e7c90fb8c88a8f303c898a
Signed-off-by: default avatarSuresh Vankadara <svankada@codeaurora.org>
parent c2e909ac

drivers/media/platform/msm/camera/cam_smmu/cam_smmu_api.c

+10 −0
Original line number Diff line number Diff line
@@ -141,6 +141,7 @@ struct cam_iommu_cb_set { 
	struct mutex payload_list_lock;

	struct list_head payload_list;

	u32 non_fatal_fault;

	u32 enable_iova_guard;

};



static const struct of_device_id msm_cam_smmu_dt_match[] = {
@@ -2912,6 +2913,15 @@ static int cam_smmu_setup_cb(struct cam_context_bank_info *cb, 
				"Error: failed to set non fatal fault attribute");

		}



		if (!strcmp(cb->name, "icp")) {

			iommu_cb_set.enable_iova_guard = 1;

			if (iommu_domain_set_attr(cb->mapping->domain,

				DOMAIN_ATTR_FORCE_IOVA_GUARD_PAGE,

				&iommu_cb_set.enable_iova_guard) < 0) {

				CAM_ERR(CAM_SMMU,

					"Failed to set iova guard pagei attr");

			}

		}

	} else {

		CAM_ERR(CAM_SMMU, "Context bank does not have IO region");

		rc = -ENODEV;