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745ef1092b
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 <j@jannau.net> Acked-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Sven Peter <sven@svenpeter.dev> Acked-by: Hector Martin <marcan@marcan.st> 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 <jroedel@suse.de>
33 lines
1.4 KiB
Makefile
33 lines
1.4 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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obj-y += amd/ intel/ arm/
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obj-$(CONFIG_IOMMU_API) += iommu.o
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obj-$(CONFIG_IOMMU_API) += iommu-traces.o
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obj-$(CONFIG_IOMMU_API) += iommu-sysfs.o
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obj-$(CONFIG_IOMMU_DEBUGFS) += iommu-debugfs.o
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obj-$(CONFIG_IOMMU_DMA) += dma-iommu.o
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obj-$(CONFIG_IOMMU_IO_PGTABLE) += io-pgtable.o
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obj-$(CONFIG_IOMMU_IO_PGTABLE_ARMV7S) += io-pgtable-arm-v7s.o
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obj-$(CONFIG_IOMMU_IO_PGTABLE_LPAE) += io-pgtable-arm.o
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obj-$(CONFIG_IOMMU_IO_PGTABLE_DART) += io-pgtable-dart.o
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obj-$(CONFIG_IOASID) += ioasid.o
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obj-$(CONFIG_IOMMU_IOVA) += iova.o
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obj-$(CONFIG_OF_IOMMU) += of_iommu.o
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obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o
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obj-$(CONFIG_IPMMU_VMSA) += ipmmu-vmsa.o
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obj-$(CONFIG_IRQ_REMAP) += irq_remapping.o
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obj-$(CONFIG_MTK_IOMMU) += mtk_iommu.o
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obj-$(CONFIG_MTK_IOMMU_V1) += mtk_iommu_v1.o
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obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o
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obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.o
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obj-$(CONFIG_ROCKCHIP_IOMMU) += rockchip-iommu.o
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obj-$(CONFIG_SUN50I_IOMMU) += sun50i-iommu.o
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obj-$(CONFIG_TEGRA_IOMMU_GART) += tegra-gart.o
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obj-$(CONFIG_TEGRA_IOMMU_SMMU) += tegra-smmu.o
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obj-$(CONFIG_EXYNOS_IOMMU) += exynos-iommu.o
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obj-$(CONFIG_FSL_PAMU) += fsl_pamu.o fsl_pamu_domain.o
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obj-$(CONFIG_S390_IOMMU) += s390-iommu.o
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obj-$(CONFIG_HYPERV_IOMMU) += hyperv-iommu.o
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obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o
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obj-$(CONFIG_IOMMU_SVA) += iommu-sva-lib.o io-pgfault.o
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obj-$(CONFIG_SPRD_IOMMU) += sprd-iommu.o
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obj-$(CONFIG_APPLE_DART) += apple-dart.o
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