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iommu/sva: Add PASID helpers

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Let IOMMU drivers allocate a single PASID per mm. Store the mm in the
IOASID set to allow refcounting and searching mm by PASID, when handling
an I/O page fault.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20201106155048.997886-3-jean-philippe@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Jean-Philippe Brucker
2020-11-06 16:50:48 +01:00
committed by Will Deacon
parent cb4789b0d1
commit cfc78dfd9b
4 changed files with 107 additions and 0 deletions
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5
drivers/iommu/Kconfig
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@@ -103,6 +103,11 @@ config IOMMU_DMA
select IRQ_MSI_IOMMU
select NEED_SG_DMA_LENGTH
# Shared Virtual Addressing library
config IOMMU_SVA_LIB
bool
select IOASID
config FSL_PAMU
bool "Freescale IOMMU support"
depends on PCI