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| author | Rob Herring <robh@kernel.org> | 2019-02-21 23:23:25 +0300 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2019-04-12 20:52:38 +0300 |
| commit | d08d42de6432d5064045159aed060e3db9fa7807 (patch) | |
| tree | 2019c00522f05dfd8df93440401a2042cd085da0 /drivers/iommu/io-pgtable.c | |
| parent | 0eb2766dd6f366d42448121c383420bb0307bcc7 (diff) | |
| download | linux-d08d42de6432d5064045159aed060e3db9fa7807.tar.xz | |
iommu: io-pgtable: Add ARM Mali midgard MMU page table format
ARM Mali midgard GPU is similar to standard 64-bit stage 1 page tables, but
have a few differences. Add a new format type to represent the format. The
input address size is 48-bits and the output address size is 40-bits (and
possibly less?). Note that the later bifrost GPUs follow the standard
64-bit stage 1 format.
The differences in the format compared to 64-bit stage 1 format are:
The 3rd level page entry bits are 0x1 instead of 0x3 for page entries.
The access flags are not read-only and unprivileged, but read and write.
This is similar to stage 2 entries, but the memory attributes field matches
stage 1 being an index.
The nG bit is not set by the vendor driver. This one didn't seem to matter,
but we'll keep it aligned to the vendor driver.
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: iommu@lists.linux-foundation.org
Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Acked-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190409205427.6943-2-robh@kernel.org
Diffstat (limited to 'drivers/iommu/io-pgtable.c')
| -rw-r--r-- | drivers/iommu/io-pgtable.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iommu/io-pgtable.c b/drivers/iommu/io-pgtable.c index 93f2880be6c6..5227cfdbb65b 100644 --- a/drivers/iommu/io-pgtable.c +++ b/drivers/iommu/io-pgtable.c @@ -30,6 +30,7 @@ io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = { [ARM_32_LPAE_S2] = &io_pgtable_arm_32_lpae_s2_init_fns, [ARM_64_LPAE_S1] = &io_pgtable_arm_64_lpae_s1_init_fns, [ARM_64_LPAE_S2] = &io_pgtable_arm_64_lpae_s2_init_fns, + [ARM_MALI_LPAE] = &io_pgtable_arm_mali_lpae_init_fns, #endif #ifdef CONFIG_IOMMU_IO_PGTABLE_ARMV7S [ARM_V7S] = &io_pgtable_arm_v7s_init_fns, |