From: Robin Murphy <robin.murphy@arm.com>
To: will@kernel.org, joro@8bytes.org
Cc: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org
Subject: [PATCH] iommu/arm-smmu: Update impl quirks comment
Date: Wed, 24 Jun 2020 11:24:51 +0100 [thread overview]
Message-ID: <1e742177e084621f3454fbaf768325a6c215656a.1592994291.git.robin.murphy@arm.com> (raw)
The comment about implementation and integration quirks being
mutually-exclusive is out of date, and in fact the code is already
structured for the case it anticipates, so document that properly.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-impl.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index c75b9d957b70..1fb4bb994dbf 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -153,10 +153,9 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
const struct device_node *np = smmu->dev->of_node;
/*
- * We will inevitably have to combine model-specific implementation
- * quirks with platform-specific integration quirks, but everything
- * we currently support happens to work out as straightforward
- * mutually-exclusive assignments.
+ * Set the impl for model-specific implementation quirks first,
+ * such that platform integration quirks can pick it up and
+ * inherit from it if necessary.
*/
switch (smmu->model) {
case ARM_MMU500:
@@ -168,6 +167,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
break;
}
+ /* This is implicitly MMU-400 */
if (of_property_read_bool(np, "calxeda,smmu-secure-config-access"))
smmu->impl = &calxeda_impl;
--
2.23.0.dirty
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next reply other threads:[~2020-06-24 10:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-24 10:24 Robin Murphy [this message]
2020-07-08 22:02 ` [PATCH] iommu/arm-smmu: Update impl quirks comment Will Deacon
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