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From: Jason Gunthorpe <jgg@nvidia.com>
To: iommu@lists.linux.dev, Joerg Roedel <joro@8bytes.org>,
	linux-arm-kernel@lists.infradead.org,
	Will Deacon <will@kernel.org>
Cc: kernel test robot <lkp@intel.com>,
	Michael Shavit <mshavit@google.com>,
	patches@lists.linux.dev, Robin Murphy <robin.murphy@arm.com>
Subject: [PATCH] iommu/arm-smmu-v3: Add cpu_to_le64() around STRTAB_STE_0_V
Date: Mon,  4 Mar 2024 15:50:08 -0400	[thread overview]
Message-ID: <0-v1-98b23ebb0c84+9f-smmu_cputole_jgg@nvidia.com> (raw)

STRTAB_STE_0_V is a CPU value, it needs conversion for sparse to be clean.

The missing annotation was a mistake introduced by splitting the ops out
from the STE writer.

Fixes: 7da51af9125c ("iommu/arm-smmu-v3: Make STE programming independent of the callers")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403011441.5WqGrYjp-lkp@intel.com/
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Unclear why 0-day did not notice this when it covered my github..

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 b7938f17222b4d..d1bc151a5dff8c 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1144,7 +1144,8 @@ static void arm_smmu_write_ste(struct arm_smmu_master *master, u32 sid,
 		 * requires a breaking update, zero the V bit, write all qwords
 		 * but 0, then set qword 0
 		 */
-		unused_update.data[0] = entry->data[0] & (~STRTAB_STE_0_V);
+		unused_update.data[0] = entry->data[0] &
+					cpu_to_le64(~STRTAB_STE_0_V);
 		entry_set(smmu, sid, entry, &unused_update, 0, 1);
 		entry_set(smmu, sid, entry, target, 1, num_entry_qwords - 1);
 		entry_set(smmu, sid, entry, target, 0, 1);

base-commit: faa6bc241bb0cd181f557d67bfd1de8223014f9e
-- 
2.43.2


WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@nvidia.com>
To: iommu@lists.linux.dev, Joerg Roedel <joro@8bytes.org>,
	linux-arm-kernel@lists.infradead.org,
	Will Deacon <will@kernel.org>
Cc: kernel test robot <lkp@intel.com>,
	Michael Shavit <mshavit@google.com>,
	patches@lists.linux.dev, Robin Murphy <robin.murphy@arm.com>
Subject: [PATCH] iommu/arm-smmu-v3: Add cpu_to_le64() around STRTAB_STE_0_V
Date: Mon,  4 Mar 2024 15:50:08 -0400	[thread overview]
Message-ID: <0-v1-98b23ebb0c84+9f-smmu_cputole_jgg@nvidia.com> (raw)

STRTAB_STE_0_V is a CPU value, it needs conversion for sparse to be clean.

The missing annotation was a mistake introduced by splitting the ops out
from the STE writer.

Fixes: 7da51af9125c ("iommu/arm-smmu-v3: Make STE programming independent of the callers")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403011441.5WqGrYjp-lkp@intel.com/
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Unclear why 0-day did not notice this when it covered my github..

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 b7938f17222b4d..d1bc151a5dff8c 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -1144,7 +1144,8 @@ static void arm_smmu_write_ste(struct arm_smmu_master *master, u32 sid,
 		 * requires a breaking update, zero the V bit, write all qwords
 		 * but 0, then set qword 0
 		 */
-		unused_update.data[0] = entry->data[0] & (~STRTAB_STE_0_V);
+		unused_update.data[0] = entry->data[0] &
+					cpu_to_le64(~STRTAB_STE_0_V);
 		entry_set(smmu, sid, entry, &unused_update, 0, 1);
 		entry_set(smmu, sid, entry, target, 1, num_entry_qwords - 1);
 		entry_set(smmu, sid, entry, target, 0, 1);

base-commit: faa6bc241bb0cd181f557d67bfd1de8223014f9e
-- 
2.43.2


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             reply	other threads:[~2024-03-04 19:50 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-04 19:50 Jason Gunthorpe [this message]
2024-03-04 19:50 ` [PATCH] iommu/arm-smmu-v3: Add cpu_to_le64() around STRTAB_STE_0_V Jason Gunthorpe
2024-03-26 17:23 ` Will Deacon
2024-03-26 17:23   ` Will Deacon

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