Now that we can correctly extract top-level indices without relying on the remaining upper bits being zero, the only remaining impediments to using a given table for TTBR1 are the address validation on map/unmap and the awkward TCR translation granule format. Add a quirk so that we can do the right thing at those points.
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| @@ -83,12 +83,16 @@ struct io_pgtable_cfg { · 82 unmodified lines | |||
| 83 | * IO_PGTABLE_QUIRK_NON_STRICT: Skip issuing synchronous leaf TLBIs | 83 | * IO_PGTABLE_QUIRK_NON_STRICT: Skip issuing synchronous leaf TLBIs |
| 84 | * on unmap, for DMA domains using the flush queue mechanism for | 84 | * on unmap, for DMA domains using the flush queue mechanism for |
| 85 | * delayed invalidation. | 85 | * delayed invalidation. |
| 86 | * | ||
| 87 | * IO_PGTABLE_QUIRK_ARM_TTBR1: (ARM LPAE format) Configure the table | ||
| 88 | * for use in the upper half of a split address space. | ||
| 86 | */ | 89 | */ |
| 87 | #define IO_PGTABLE_QUIRK_ARM_NS BIT(0) | 90 | #define IO_PGTABLE_QUIRK_ARM_NS BIT(0) |
| 88 | #define IO_PGTABLE_QUIRK_NO_PERMS BIT(1) | 91 | #define IO_PGTABLE_QUIRK_NO_PERMS BIT(1) |
| 89 | #define IO_PGTABLE_QUIRK_TLBI_ON_MAP BIT(2) | 92 | #define IO_PGTABLE_QUIRK_TLBI_ON_MAP BIT(2) |
| 90 | #define IO_PGTABLE_QUIRK_ARM_MTK_EXT BIT(3) | 93 | #define IO_PGTABLE_QUIRK_ARM_MTK_EXT BIT(3) |
| 91 | #define IO_PGTABLE_QUIRK_NON_STRICT BIT(4) | 94 | #define IO_PGTABLE_QUIRK_NON_STRICT BIT(4) |
| 95 | #define IO_PGTABLE_QUIRK_ARM_TTBR1 BIT(5) | ||
| 92 | unsigned long quirks; | 96 | unsigned long quirks; |
| 93 | unsigned long pgsize_bitmap; | 97 | unsigned long pgsize_bitmap; |
| 94 | unsigned int ias; | 98 | unsigned int ias; |