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Wed, 19 Feb 2025 17:32:29 -0800 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , Subject: [PATCH v2 4/7] irqchip: Have CONFIG_IRQ_MSI_IOMMU be selected by irqchips that need it Date: Wed, 19 Feb 2025 17:31:39 -0800 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF00022575:EE_|BL1PR12MB5876:EE_ X-MS-Office365-Filtering-Correlation-Id: 75f82c24-1be5-4307-fe12-08dd514e78a2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(7416014)(82310400026)(1800799024)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Feb 2025 01:32:42.7381 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 75f82c24-1be5-4307-fe12-08dd514e78a2 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF00022575.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5876 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250219_173254_207255_F0E73652 X-CRM114-Status: GOOD ( 12.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Jason Gunthorpe Currently, IRQ_MSI_IOMMU is selected if DMA_IOMMU is available to provide an implementation for iommu_dma_prepare/compose_msi_msg(). However, it'll make more sense for irqchips that call prepare/compose to select it, and that will trigger all the additional code and data to be compiled into the kernel. If IRQ_MSI_IOMMU is selected with no IOMMU side implementation, then the prepare/compose() will be NOP stubs. If IRQ_MSI_IOMMU is not selected by an irqchip, then the related code on the iommu side is compiled out. Signed-off-by: Jason Gunthorpe Signed-off-by: Nicolin Chen Reviewed-by: Thomas Gleixner --- drivers/iommu/Kconfig | 1 - drivers/irqchip/Kconfig | 4 ++++ kernel/irq/Kconfig | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index ec1b5e32b972..5124e7431fe3 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -154,7 +154,6 @@ config IOMMU_DMA select DMA_OPS_HELPERS select IOMMU_API select IOMMU_IOVA - select IRQ_MSI_IOMMU select NEED_SG_DMA_LENGTH select NEED_SG_DMA_FLAGS if SWIOTLB diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index c11b9965c4ad..64658a1c3aa1 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -28,6 +28,7 @@ config ARM_GIC_V2M select ARM_GIC select IRQ_MSI_LIB select PCI_MSI + select IRQ_MSI_IOMMU config GIC_NON_BANKED bool @@ -38,12 +39,14 @@ config ARM_GIC_V3 select PARTITION_PERCPU select GENERIC_IRQ_EFFECTIVE_AFF_MASK if SMP select HAVE_ARM_SMCCC_DISCOVERY + select IRQ_MSI_IOMMU config ARM_GIC_V3_ITS bool select GENERIC_MSI_IRQ select IRQ_MSI_LIB default ARM_GIC_V3 + select IRQ_MSI_IOMMU config ARM_GIC_V3_ITS_FSL_MC bool @@ -408,6 +411,7 @@ config LS_EXTIRQ config LS_SCFG_MSI def_bool y if SOC_LS1021A || ARCH_LAYERSCAPE + select IRQ_MSI_IOMMU depends on PCI_MSI config PARTITION_PERCPU diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 5432418c0fea..9636aed20401 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -100,6 +100,7 @@ config GENERIC_MSI_IRQ bool select IRQ_DOMAIN_HIERARCHY +# irqchip drivers should select this if they call iommu_dma_prepare_msi() config IRQ_MSI_IOMMU bool