linux-dev/drivers/iommu/Makefile, branch master

iommu/io-pgtable: Move Apple DART support to its own file

2022-09-26T11:48:40Z

The pte format used by the DARTs found in the Apple M1 (t8103) is not fully compatible with io-pgtable-arm. The 24 MSB are used for subpage protection (mapping only parts of page) and conflict with the address mask. In addition bit 1 is not available for tagging entries but disables subpage protection. Subpage protection could be useful to support a CPU granule of 4k with the fixed IOMMU page size of 16k. The DARTs found on Apple M1 Pro/Max/Ultra use another different pte format which is even less compatible. To support an output address size of 42 bit the address is shifted down by 4. Subpage protection is mandatory and bit 1 signifies uncached mappings used by the display controller. It would be advantageous to share code for all known Apple DART variants to support common features. The page table allocator for DARTs is less complex since it uses a two levels of translation table without support for huge pages. Signed-off-by: Janne Grunau Acked-by: Robin Murphy Acked-by: Sven Peter Acked-by: Hector Martin Link: https://lore.kernel.org/r/20220916094152.87137-3-j@jannau.net [ joro: Fix compile warning in __dart_alloc_pages()] Signed-off-by: Joerg Roedel

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/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

Merge branches 'iommu/fixes', 'arm/mediatek', 'arm/smmu', 'arm/exynos', 'unisoc', 'x86/vt-d', 'x86/amd' and 'core' into next

2021-04-16T15:16:03Z

iommu: Add a page fault handler

2021-04-07T08:54:29Z

Some systems allow devices to handle I/O Page Faults in the core mm. For example systems implementing the PCIe PRI extension or Arm SMMU stall model. Infrastructure for reporting these recoverable page faults was added to the IOMMU core by commit 0c830e6b3282 ("iommu: Introduce device fault report API"). Add a page fault handler for host SVA. IOMMU driver can now instantiate several fault workqueues and link them to IOPF-capable devices. Drivers can choose between a single global workqueue, one per IOMMU device, one per low-level fault queue, one per domain, etc. When it receives a fault event, most commonly in an IRQ handler, the IOMMU driver reports the fault using iommu_report_device_fault(), which calls the registered handler. The page fault handler then calls the mm fault handler, and reports either success or failure with iommu_page_response(). After the handler succeeds, the hardware retries the access. The iopf_param pointer could be embedded into iommu_fault_param. But putting iopf_param into the iommu_param structure allows us not to care about ordering between calls to iopf_queue_add_device() and iommu_register_device_fault_handler(). Tested-by: Lu Baolu Reviewed-by: Eric Auger Reviewed-by: Jacob Pan Reviewed-by: Jonathan Cameron Reviewed-by: Lu Baolu Signed-off-by: Jean-Philippe Brucker Link: https://lore.kernel.org/r/20210401154718.307519-7-jean-philippe@linaro.org Signed-off-by: Joerg Roedel

iommu: add Unisoc IOMMU basic driver

2021-03-18T09:50:38Z

This IOMMU module can be used by Unisoc's multimedia devices, such as display, Image codec(jpeg) and a few signal processors, including VSP(video), GSP(graphic), ISP(image), and CPP(camera pixel processor), etc. Signed-off-by: Chunyan Zhang Link: https://lore.kernel.org/r/20210305093216.201897-3-zhang.lyra@gmail.com Signed-off-by: Joerg Roedel

iommu/sva: Add PASID helpers

2020-11-23T14:16:55Z

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 Reviewed-by: Lu Baolu Link: https://lore.kernel.org/r/20201106155048.997886-3-jean-philippe@linaro.org Signed-off-by: Will Deacon

Merge tag 'arm-smmu-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into next

2020-07-29T12:47:37Z

More Arm SMMU updates for 5.9 - Move Arm SMMU driver files into their own subdirectory

Merge branches 'arm/renesas', 'arm/qcom', 'arm/mediatek', 'arm/omap', 'arm/exynos', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd' and 'core' into next

2020-07-29T12:42:00Z

iommu/amd: Move Kconfig and Makefile bits down into amd directory

2020-07-29T12:15:36Z

Move AMD Kconfig and Makefile bits down into the amd directory with the rest of the AMD specific files. Signed-off-by: Jerry Snitselaar Cc: Joerg Roedel Cc: Suravee Suthikulpanit Link: https://lore.kernel.org/r/20200630200636.48600-3-jsnitsel@redhat.com Signed-off-by: Joerg Roedel