kernel/linux.git/include/linux/io-pgtable.h, branch v6.6.132

iommu/io-pgtable: Remove map/unmap

2022-11-19T09:44:16+00:00

With all users now calling {map,unmap}_pages, retire the redundant single-page callbacks. Signed-off-by: Robin Murphy Acked-by: Will Deacon Link: https://lore.kernel.org/r/a5a3cbf95c3279982e378cc43dad830322a59868.1668100209.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel

Merge branches 'apple/dart', 'arm/mediatek', 'arm/omap', 'arm/smmu', 'virtio', 'x86/vt-d', 'x86/amd' and 'core' into next

2022-09-26T13:52:31+00:00

iommu/io-pgtable-dart: Add DART PTE support for t6000

2022-09-26T11:49:40+00:00

The DARTs present in the M1 Pro/Max/Ultra SoC use a diffent PTE format. They support a 42bit physical address space by shifting the paddr and extending its mask inside the PTE. They also come with mandatory sub-page protection now which we just configure to always allow access to the entire page. This feature is already present but optional on the previous DARTs which allows to unconditionally configure it. Signed-off-by: Sven Peter Co-developed-by: Janne Grunau Signed-off-by: Janne Grunau Reviewed-by: Rob Herring Acked-by: Hector Martin Link: https://lore.kernel.org/r/20220916094152.87137-5-j@jannau.net Signed-off-by: Joerg Roedel

iommu/amd: Initial support for AMD IOMMU v2 page table

2022-09-07T14:12:35+00:00

Introduce IO page table framework support for AMD IOMMU v2 page table. This patch implements 4 level page table within iommu amd driver and supports 4K/2M/1G page sizes. Signed-off-by: Vasant Hegde Link: https://lore.kernel.org/r/20220825063939.8360-7-vasant.hegde@amd.com Signed-off-by: Joerg Roedel

iommu/io-pgtable-arm-v7s: Add a quirk to allow pgtable PA up to 35bit

2022-07-07T07:42:59+00:00

Single memory zone feature will remove ZONE_DMA32 and ZONE_DMA and cause pgtable PA size larger than 32bit. Since Mediatek IOMMU hardware support at most 35bit PA in pgtable, so add a quirk to allow the PA of pgtables support up to bit35. Signed-off-by: Ning Li Signed-off-by: Yunfei Wang Reviewed-by: Robin Murphy Acked-by: Will Deacon Link: https://lore.kernel.org/r/20220630092927.24925-2-yf.wang@mediatek.com Signed-off-by: Joerg Roedel

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

2021-08-20T15:14:35+00:00

iommu/io-pgtable: Remove non-strict quirk

2021-08-18T11:25:32+00:00

IO_PGTABLE_QUIRK_NON_STRICT was never a very comfortable fit, since it's not a quirk of the pagetable format itself. Now that we have a more appropriate way to convey non-strict unmaps, though, this last of the non-quirk quirks can also go, and with the flush queue code also now enforcing its own ordering we can have a lovely cleanup all round. Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/155b5c621cd8936472e273a8b07a182f62c6c20d.1628682049.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel

iommu/io-pgtable: Add DART pagetable format

2021-08-12T11:15:02+00:00

Apple's DART iommu uses a pagetable format that shares some similarities with the ones already implemented by io-pgtable.c. Add a new format variant to support the required differences so that we don't have to duplicate the pagetable handling code. Reviewed-by: Alexander Graf Reviewed-by: Alyssa Rosenzweig Reviewed-by: Robin Murphy Signed-off-by: Sven Peter Link: https://lore.kernel.org/r/20210803121651.61594-2-sven@svenpeter.dev Signed-off-by: Joerg Roedel

iommu/io-pgtable: Introduce map_pages() as a page table op

2021-07-26T10:37:07+00:00

Mapping memory into io-pgtables follows the same semantics that unmapping memory used to follow (i.e. a buffer will be mapped one page block per call to the io-pgtable code). This means that it can be optimized in the same way that unmapping memory was, so add a map_pages() callback to the io-pgtable ops structure, so that a range of pages of the same size can be mapped within the same call. Signed-off-by: Isaac J. Manjarres Suggested-by: Will Deacon Signed-off-by: Georgi Djakov Link: https://lore.kernel.org/r/1623850736-389584-4-git-send-email-quic_c_gdjako@quicinc.com Signed-off-by: Joerg Roedel

iommu/io-pgtable: Introduce unmap_pages() as a page table op

2021-07-26T10:37:06+00:00

The io-pgtable code expects to operate on a single block or granule of memory that is supported by the IOMMU hardware when unmapping memory. This means that when a large buffer that consists of multiple such blocks is unmapped, the io-pgtable code will walk the page tables to the correct level to unmap each block, even for blocks that are virtually contiguous and at the same level, which can incur an overhead in performance. Introduce the unmap_pages() page table op to express to the io-pgtable code that it should unmap a number of blocks of the same size, instead of a single block. Doing so allows multiple blocks to be unmapped in one call to the io-pgtable code, reducing the number of page table walks, and indirect calls. Signed-off-by: Isaac J. Manjarres Suggested-by: Will Deacon Signed-off-by: Will Deacon Signed-off-by: Georgi Djakov Link: https://lore.kernel.org/r/1623850736-389584-2-git-send-email-quic_c_gdjako@quicinc.com Signed-off-by: Joerg Roedel