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authorJason Gunthorpe <jgg@nvidia.com>2023-10-27 08:05:20 +0800
committerJoerg Roedel <jroedel@suse.de>2023-12-12 10:11:27 +0100
commit8f23f5dba6b4693448144bde4dd6f537543442c2 (patch)
tree2d3c317c082ccbd7b038ccfb7ed22cfcc7679d0a /arch/Kconfig
parent61f054f3c8a6d6081e078e93aba144760aed17c9 (diff)
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iommu: Change kconfig around IOMMU_SVA
Linus suggested that the kconfig here is confusing: https://lore.kernel.org/all/CAHk-=wgUiAtiszwseM1p2fCJ+sC4XWQ+YN4TanFhUgvUqjr9Xw@mail.gmail.com/ Let's break it into three kconfigs controlling distinct things: - CONFIG_IOMMU_MM_DATA controls if the mm_struct has the additional fields for the IOMMU. Currently only PASID, but later patches store a struct iommu_mm_data * - CONFIG_ARCH_HAS_CPU_PASID controls if the arch needs the scheduling bit for keeping track of the ENQCMD instruction. x86 will select this if IOMMU_SVA is enabled - IOMMU_SVA controls if the IOMMU core compiles in the SVA support code for iommu driver use and the IOMMU exported API This way ARM will not enable CONFIG_ARCH_HAS_CPU_PASID Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/20231027000525.1278806-2-tina.zhang@intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index f4b210ab0612..3e49f862670e 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -301,6 +301,11 @@ config ARCH_HAS_DMA_CLEAR_UNCACHED
config ARCH_HAS_CPU_FINALIZE_INIT
bool
+# The architecture has a per-task state that includes the mm's PASID
+config ARCH_HAS_CPU_PASID
+ bool
+ select IOMMU_MM_DATA
+
# Select if arch init_task must go in the __init_task_data section
config ARCH_TASK_STRUCT_ON_STACK
bool