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Mon, 13 Jul 2026 04:15:46 -0700 From: Ashish Mhetre To: , , , , , , , CC: , , , , , Ashish Mhetre Subject: [PATCH v6 1/3] iommu/arm-smmu-v3: Factor out CMDQ batch force-sync conditions Date: Mon, 13 Jul 2026 11:15:40 +0000 Message-ID: <20260713111543.1462161-2-amhetre@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260713111543.1462161-1-amhetre@nvidia.com> References: <20260713111543.1462161-1-amhetre@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF00006001:EE_|DS4PR12MB999076:EE_ X-MS-Office365-Filtering-Correlation-Id: 9046e1f4-0140-4364-31fe-08dee0d01eb7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|23010399003|7416014|376014|36860700016|1800799024|18002099003|22082099003|11063799006|56012099006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(23010399003)(7416014)(376014)(36860700016)(1800799024)(18002099003)(22082099003)(11063799006)(56012099006);DIR:OUT;SFP:1101; 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Lift those checks into a new arm_smmu_cmdq_batch_force_sync() helper so that adding another force-sync condition becomes a one-line addition. No functional change. Signed-off-by: Nicolin Chen Signed-off-by: Ashish Mhetre --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 23 +++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) 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 57b750ebcd3d..dd7475c50afc 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -847,16 +847,27 @@ static void arm_smmu_cmdq_batch_init_cmd(struct arm_smmu_device *smmu, cmds->cmdq = arm_smmu_get_cmdq(smmu, cmd); } +static bool arm_smmu_cmdq_batch_force_sync(struct arm_smmu_device *smmu, + struct arm_smmu_cmdq_batch *cmds, + struct arm_smmu_cmd *cmd) +{ + /* The batch's pre-assigned cmdq doesn't support the new command */ + if (!arm_smmu_cmdq_supports_cmd(cmds->cmdq, cmd)) + return true; + + /* Arm erratum 2812531 */ + if (cmds->num == CMDQ_BATCH_ENTRIES - 1 && + (smmu->options & ARM_SMMU_OPT_CMDQ_FORCE_SYNC)) + return true; + + return false; +} + static void arm_smmu_cmdq_batch_add_cmd_p(struct arm_smmu_device *smmu, struct arm_smmu_cmdq_batch *cmds, struct arm_smmu_cmd *cmd) { - bool force_sync = (cmds->num == CMDQ_BATCH_ENTRIES - 1) && - (smmu->options & ARM_SMMU_OPT_CMDQ_FORCE_SYNC); - bool unsupported_cmd; - - unsupported_cmd = !arm_smmu_cmdq_supports_cmd(cmds->cmdq, cmd); - if (force_sync || unsupported_cmd) { + if (arm_smmu_cmdq_batch_force_sync(smmu, cmds, cmd)) { arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmdq, cmds->cmds, cmds->num, true); arm_smmu_cmdq_batch_init_cmd(smmu, cmds, cmd); -- 2.50.1