From 96093fe54f4864b07013cf61b847708233832841 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Wed, 19 Feb 2025 17:31:39 -0800 Subject: irqchip: Have CONFIG_IRQ_MSI_IOMMU be selected by irqchips that need it 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. Link: https://patch.msgid.link/r/a2620f67002c5cdf974e89ca3bf905f5c0817be6.1740014950.git.nicolinc@nvidia.com Signed-off-by: Nicolin Chen Reviewed-by: Thomas Gleixner Signed-off-by: Jason Gunthorpe --- kernel/irq/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'kernel') 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 -- cgit v1.2.3