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| author | Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> | 2020-11-25 12:30:11 +0530 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-11-25 12:39:09 +0000 |
| commit | e67890c97944b9962cf8c140a7f8077ed643b7d7 (patch) | |
| tree | 0d28bec804f2f21c08b99b8bb937c53d52468213 /include | |
| parent | a7656ecf825ac0434a5e7bf108ec1a56b65ee5e4 (diff) | |
| download | linux-stable-e67890c97944b9962cf8c140a7f8077ed643b7d7.tar.gz linux-stable-e67890c97944b9962cf8c140a7f8077ed643b7d7.tar.bz2 linux-stable-e67890c97944b9962cf8c140a7f8077ed643b7d7.zip | |
iommu/io-pgtable-arm: Add support to use system cache
Add a quirk IO_PGTABLE_QUIRK_ARM_OUTER_WBWA to override
the outer-cacheability attributes set in the TCR for a
non-coherent page table walker when using system cache.
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Link: https://lore.kernel.org/r/f818676b4a2a9ad1edb92721947d47db41ed6a7c.1606287059.git.saiprakash.ranjan@codeaurora.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/io-pgtable.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 215fd9d69540..fb4d5a763e0c 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -86,6 +86,9 @@ struct io_pgtable_cfg { * * IO_PGTABLE_QUIRK_ARM_TTBR1: (ARM LPAE format) Configure the table * for use in the upper half of a split address space. + * + * IO_PGTABLE_QUIRK_ARM_OUTER_WBWA: Override the outer-cacheability + * attributes set in the TCR for a non-coherent page-table walker. */ #define IO_PGTABLE_QUIRK_ARM_NS BIT(0) #define IO_PGTABLE_QUIRK_NO_PERMS BIT(1) @@ -93,6 +96,7 @@ struct io_pgtable_cfg { #define IO_PGTABLE_QUIRK_ARM_MTK_EXT BIT(3) #define IO_PGTABLE_QUIRK_NON_STRICT BIT(4) #define IO_PGTABLE_QUIRK_ARM_TTBR1 BIT(5) + #define IO_PGTABLE_QUIRK_ARM_OUTER_WBWA BIT(6) unsigned long quirks; unsigned long pgsize_bitmap; unsigned int ias; |