linux-kernel - [PATCH v8 8/9] iommu/arm-smmu-v3: Update comment about STE liveness

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Date:   Fri, 15 Sep 2023 21:17:39 +0800
From:   Michael Shavit <mshavit@...gle.com>
To:     iommu@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     nicolinc@...dia.com, jgg@...dia.com, jean-philippe@...aro.org,
        robin.murphy@....com, will@...nel.org,
        Michael Shavit <mshavit@...gle.com>,
        Alistair Popple <apopple@...dia.com>,
        Dawei Li <set_pte_at@...look.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Jason Gunthorpe <jgg@...pe.ca>, Joerg Roedel <joro@...tes.org>,
        Kevin Tian <kevin.tian@...el.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Tomas Krcka <krckatom@...zon.de>
Subject: [PATCH v8 8/9] iommu/arm-smmu-v3: Update comment about STE liveness

Update the comment to reflect the fact that the STE is not always
installed. arm_smmu_domain_finalise_s1 intentionnaly calls
arm_smmu_write_ctx_desc while the STE is not installed.

Reviewed-by: Nicolin Chen <nicolinc@...dia.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Michael Shavit <mshavit@...gle.com>
---

(no changes since v6)

Changes in v6:
- New commit

 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index f9bfa2c8ab1e3..86e4e2df9e2fa 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1091,7 +1091,7 @@ int arm_smmu_write_ctx_desc(struct arm_smmu_master *master, int ssid,
 		cdptr[3] = cpu_to_le64(cd->mair);
 
 		/*
-		 * STE is live, and the SMMU might read dwords of this CD in any
+		 * STE may be live, and the SMMU might read dwords of this CD in any
 		 * order. Ensure that it observes valid values before reading
 		 * V=1.
 		 */
-- 
2.42.0.459.ge4e396fd5e-goog