linux-kernel - [PATCH v1 1/6] iommu: Add DOMAIN_ATTR

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Date:   Tue, 28 Jan 2020 15:16:05 -0700
From:   Jordan Crouse <jcrouse@...eaurora.org>
To:     iommu@...ts.linux-foundation.org
Cc:     robin.murphy@....com, will@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, Joerg Roedel <joro@...tes.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 1/6] iommu: Add DOMAIN_ATTR_PTBASE

Add an attribute to return the base address of the pagetable. This is used
by auxiliary domains from arm-smmu to return the address of the pagetable
to the domain so that it can set the appropriate pagetable through it's
own means.

Signed-off-by: Jordan Crouse <jcrouse@...eaurora.org>
---

 include/linux/iommu.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index b14398b..0e9bcd9 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -128,6 +128,8 @@ enum iommu_attr {
 	DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
 	/* Enable split pagetables (for example, TTBR1 on arm-smmu) */
 	DOMAIN_ATTR_SPLIT_TABLES,
+	/* Return the pagetable base address */
+	DOMAIN_ATTR_PTBASE,
 	DOMAIN_ATTR_MAX,
 };
 
-- 
2.7.4