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| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-10-27 08:05:20 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-12-12 10:11:27 +0100 |
| commit | 8f23f5dba6b4693448144bde4dd6f537543442c2 (patch) | |
| tree | 2d3c317c082ccbd7b038ccfb7ed22cfcc7679d0a /arch/Kconfig | |
| parent | 61f054f3c8a6d6081e078e93aba144760aed17c9 (diff) | |
| download | linux-stable-8f23f5dba6b4693448144bde4dd6f537543442c2.tar.gz linux-stable-8f23f5dba6b4693448144bde4dd6f537543442c2.tar.bz2 linux-stable-8f23f5dba6b4693448144bde4dd6f537543442c2.zip | |
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/Kconfig | 5 |
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 |