linux-dev/drivers/iommu/Kconfig, branch linus/master

iommu/sva: Rename CONFIG_IOMMU_SVA_LIB to CONFIG_IOMMU_SVA

2022-02-14T18:17:46Z

This CONFIG option originally only referred to the Shared Virtual Address (SVA) library. But it is now also used for non-library portions of code. Drop the "_LIB" suffix so that there is just one configuration option for all code relating to SVA. Signed-off-by: Fenghua Yu Signed-off-by: Borislav Petkov Reviewed-by: Tony Luck Reviewed-by: Thomas Gleixner Reviewed-by: Lu Baolu Link: https://lore.kernel.org/r/20220207230254.3342514-2-fenghua.yu@intel.com

iommu/arm: fix ARM_SMMU_QCOM compilation

2021-10-13T19:28:44Z

My previous bugfix ended up making things worse for the QCOM IOMMU driver when it forgot to add the Kconfig symbol that is getting used to control the compilation of the SMMU implementation specific code for Qualcomm. Fixes: 424953cf3c66 ("qcom_scm: hide Kconfig symbol") Reported-by: Daniel Lezcano Reported-by: Dmitry Baryshkov Reported-by: John Stultz Link: https://lore.kernel.org/lkml/20211010023350.978638-1-dmitry.baryshkov@linaro.org/ Acked-by: Will Deacon Signed-off-by: Arnd Bergmann

qcom_scm: hide Kconfig symbol

2021-10-07T14:51:57Z

Now that SCM can be a loadable module, we have to add another dependency to avoid link failures when ipa or adreno-gpu are built-in: aarch64-linux-ld: drivers/net/ipa/ipa_main.o: in function `ipa_probe': ipa_main.c:(.text+0xfc4): undefined reference to `qcom_scm_is_available' ld.lld: error: undefined symbol: qcom_scm_is_available >>> referenced by adreno_gpu.c >>> gpu/drm/msm/adreno/adreno_gpu.o:(adreno_zap_shader_load) in archive drivers/built-in.a This can happen when CONFIG_ARCH_QCOM is disabled and we don't select QCOM_MDT_LOADER, but some other module selects QCOM_SCM. Ideally we'd use a similar dependency here to what we have for QCOM_RPROC_COMMON, but that causes dependency loops from other things selecting QCOM_SCM. This appears to be an endless problem, so try something different this time: - CONFIG_QCOM_SCM becomes a hidden symbol that nothing 'depends on' but that is simply selected by all of its users - All the stubs in include/linux/qcom_scm.h can go away - arm-smccc.h needs to provide a stub for __arm_smccc_smc() to allow compile-testing QCOM_SCM on all architectures. - To avoid a circular dependency chain involving RESET_CONTROLLER and PINCTRL_SUNXI, drop the 'select RESET_CONTROLLER' statement. According to my testing this still builds fine, and the QCOM platform selects this symbol already. Acked-by: Kalle Valo Acked-by: Alex Elder Signed-off-by: Arnd Bergmann

Merge tag 'iommu-fixes-v5.15-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

2021-09-10T18:42:03Z

Pull iommu fixes from Joerg Roedel: - Intel VT-d: - PASID leakage in intel_svm_unbind_mm() - Deadlock in intel_svm_drain_prq() - AMD IOMMU: Fixes for an unhandled page-fault bug when AVIC is used for a KVM guest. - Make CONFIG_IOMMU_DEFAULT_DMA_LAZY architecture instead of IOMMU driver dependent * tag 'iommu-fixes-v5.15-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: iommu: Clarify default domain Kconfig iommu/vt-d: Fix a deadlock in intel_svm_drain_prq() iommu/vt-d: Fix PASID leak in intel_svm_unbind_mm() iommu/amd: Remove iommu_init_ga() iommu/amd: Relocate GAMSup check to early_enable_iommus

iommu: Clarify default domain Kconfig

2021-09-09T11:18:07Z

Although strictly it is the AMD and Intel drivers which have an existing expectation of lazy behaviour by default, it ends up being rather unintuitive to describe this literally in Kconfig. Express it instead as an architecture dependency, to clarify that it is a valid config-time decision. The end result is the same since virtio-iommu doesn't support lazy mode and thus falls back to strict at runtime regardless. The per-architecture disparity is a matter of historical expectations: the AMD and Intel drivers have been lazy by default since 2008, and changing that gets noticed by people asking where their I/O throughput has gone. Conversely, Arm-based systems with their wider assortment of IOMMU drivers mostly only support strict mode anyway; only the Arm SMMU drivers have later grown support for passthrough and lazy mode, for users who wanted to explicitly trade off isolation for performance. These days, reducing the default level of isolation in a way which may go unnoticed by users who expect otherwise hardly seems worth risking for the sake of one line of Kconfig, so here's where we are. Reported-by: Linus Torvalds Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/69a0c6f17b000b54b8333ee42b3124c1d5a869e2.1631105737.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel

Merge tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

2021-09-03T17:44:35Z

Pull iommu updates from Joerg Roedel: - New DART IOMMU driver for Apple Silicon M1 chips - Optimizations for iommu_[map/unmap] performance - Selective TLB flush support for the AMD IOMMU driver to make it more efficient on emulated IOMMUs - Rework IOVA setup and default domain type setting to move more code out of IOMMU drivers and to support runtime switching between certain types of default domains - VT-d Updates from Lu Baolu: - Update the virtual command related registers - Enable Intel IOMMU scalable mode by default - Preset A/D bits for user space DMA usage - Allow devices to have more than 32 outstanding PRs - Various cleanups - ARM SMMU Updates from Will Deacon: SMMUv3: - Minor optimisation to avoid zeroing struct members on CMD submission - Increased use of batched commands to reduce submission latency - Refactoring in preparation for ECMDQ support SMMUv2: - Fix races when probing devices with identical StreamIDs - Optimise walk cache flushing for Qualcomm implementations - Allow deep sleep states for some Qualcomm SoCs with shared clocks - Various smaller optimizations, cleanups, and fixes * tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (85 commits) iommu/io-pgtable: Abstract iommu_iotlb_gather access iommu/arm-smmu: Fix missing unlock on error in arm_smmu_device_group() iommu/vt-d: Add present bit check in pasid entry setup helpers iommu/vt-d: Use pasid_pte_is_present() helper function iommu/vt-d: Drop the kernel doc annotation iommu/vt-d: Allow devices to have more than 32 outstanding PRs iommu/vt-d: Preset A/D bits for user space DMA usage iommu/vt-d: Enable Intel IOMMU scalable mode by default iommu/vt-d: Refactor Kconfig a bit iommu/vt-d: Remove unnecessary oom message iommu/vt-d: Update the virtual command related registers iommu: Allow enabling non-strict mode dynamically iommu: Merge strictness and domain type configs iommu: Only log strictness for DMA domains iommu: Expose DMA domain strictness via sysfs iommu: Express DMA strictness via the domain type iommu/vt-d: Prepare for multiple DMA domain types iommu/arm-smmu: Prepare for multiple DMA domain types iommu/amd: Prepare for multiple DMA domain types iommu: Introduce explicit type for non-strict DMA domains ...

Merge branches 'apple/dart', 'arm/smmu', 'iommu/fixes', 'x86/amd', 'x86/vt-d' and 'core' into next

2021-08-20T15:14:35Z

iommu: Merge strictness and domain type configs

2021-08-18T11:27:49Z

To parallel the sysfs behaviour, merge the new build-time option for DMA domain strictness into the default domain type choice. Suggested-by: Joerg Roedel Reviewed-by: Lu Baolu Reviewed-by: Jean-Philippe Brucker Reviewed-by: John Garry Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/d04af35b9c0f2a1d39605d7a9b451f5e1f0c7736.1628682049.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel

iommu/dart: APPLE_DART should depend on ARCH_APPLE

2021-08-12T11:23:19Z

The Apple DART (Device Address Resolution Table) IOMMU is only present on Apple ARM SoCs like the M1. Hence add a dependency on ARCH_APPLE, to prevent asking the user about this driver when configuring a kernel without support for the Apple Silicon SoC family. Signed-off-by: Geert Uytterhoeven Acked-by: Sven Peter Link: https://lore.kernel.org/r/44fcf525273b32c9afcd7e99acbd346d47f0e047.1628603162.git.geert+renesas@glider.be Signed-off-by: Joerg Roedel

iommu/dart: Add DART iommu driver

2021-08-12T11:15:02Z

Apple's new SoCs use iommus for almost all peripherals. These Device Address Resolution Tables must be setup before these peripherals can act as DMA masters. Tested-by: Alyssa Rosenzweig Signed-off-by: Sven Peter Link: https://lore.kernel.org/r/20210803121651.61594-4-sven@svenpeter.dev Signed-off-by: Joerg Roedel