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Merge branches 'arm/exynos', 'arm/mediatek', 'arm/msm', 'arm/smmu', 'virtio', 'x86/vt-d', 'x86/amd' and 'core' into next

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This commit is contained in:
Joerg Roedel
2022-07-29 12:06:56 +02:00
parent e0dccc3b76 7fee5d6f41 3168010d2a f066b8f7d9 d4ebd11f32 7e62edd7a3 25357900f4 be280ea763 de0269765b
commit c10100a416
59 changed files with 2530 additions and 1493 deletions
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36
drivers/iommu/Kconfig
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@@ -144,6 +144,32 @@ config IOMMU_DMA
select IRQ_MSI_IOMMU
select NEED_SG_DMA_LENGTH
config IOMMU_DMA_PCI_SAC
bool "Enable 64-bit legacy PCI optimisation by default"
depends on IOMMU_DMA
help
Enable by default an IOMMU optimisation for 64-bit legacy PCI devices,
wherein the DMA API layer will always first try to allocate a 32-bit
DMA address suitable for a single address cycle, before falling back
to allocating from the device's full usable address range. If your
system has 64-bit legacy PCI devices in 32-bit slots where using dual
address cycles reduces DMA throughput significantly, this may be
beneficial to overall performance.
If you have a modern PCI Express based system, this feature mostly just
represents extra overhead in the allocation path for no practical
benefit, and it should usually be preferable to say "n" here.
However, beware that this feature has also historically papered over
bugs where the IOMMU address width and/or device DMA mask is not set
correctly. If device DMA problems and IOMMU faults start occurring
after disabling this option, it is almost certainly indicative of a
latent driver or firmware/BIOS bug, which would previously have only
manifested with several gigabytes worth of concurrent DMA mappings.
If this option is not set, the feature can still be re-enabled at
boot time with the "iommu.forcedac=0" command-line argument.
# Shared Virtual Addressing
config IOMMU_SVA
bool
@@ -363,6 +389,16 @@ config ARM_SMMU_QCOM
When running on a Qualcomm platform that has the custom variant
of the ARM SMMU, this needs to be built into the SMMU driver.
config ARM_SMMU_QCOM_DEBUG
bool "ARM SMMU QCOM implementation defined debug support"
depends on ARM_SMMU_QCOM
help
Support for implementation specific debug features in ARM SMMU
hardware found in QTI platforms.
Say Y here to enable debug for issues such as TLB sync timeouts
which requires implementation defined register dumps.
config ARM_SMMU_V3
tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"
depends on ARM64