diff options
| author | Hector Martin <marcan@marcan.st> | 2025-08-21 12:15:59 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2025-09-05 14:27:31 +0200 |
| commit | 74a0e72f03ffd01b5d88b411f02d9b9861fdb99e (patch) | |
| tree | d3652c4d1c3643e150b64a89678603481354fcb4 /include | |
| parent | iommu/apple-dart: Make the hw register fields u32s (diff) | |
| download | linux-74a0e72f03ffd01b5d88b411f02d9b9861fdb99e.tar.gz linux-74a0e72f03ffd01b5d88b411f02d9b9861fdb99e.zip | |
iommu/io-pgtable-dart: Add 4-level page table support
DARTs on t602x SoCs are of the t8110 variant but have an IAS of 42,
which means optional support for an extra page table level.
Refactor the PTE management to support an arbitrary level count, and
then calculate how many levels we need for any given configuration.
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Sven Peter <sven@kernel.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Link: https://lore.kernel.org/r/20250821-apple-dart-4levels-v2-2-e39af79daa37@jannau.net
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/io-pgtable.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 138fbd89b1e6..8a823c6f2b4a 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -180,6 +180,7 @@ struct io_pgtable_cfg { struct { u64 ttbr[4]; u32 n_ttbrs; + u32 n_levels; } apple_dart_cfg; struct { |