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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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cc5d2b3b95
If a caller of __create_mapping provides a PA and VA which have different sub-page offsets, it is not clear which offset they expect to apply to the mapping, and is indicative of a bad caller. In some cases, the region we wish to map may validly have a sub-page offset in the physical and virtual addresses. For example, EFI runtime regions have 4K granularity, yet may be mapped by a 64K page kernel. So long as the physical and virtual offsets are the same, the region will be mapped at the expected VAs. Disallow calls with differing sub-page offsets, and WARN when they are encountered, so that we can detect and fix such cases. Cc: Laura Abbott <labbott@fedoraproject.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Steve Capper <steve.capper@linaro.org> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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| .. | ||
| cache.S | ||
| context.c | ||
| copypage.c | ||
| dma-mapping.c | ||
| dump.c | ||
| extable.c | ||
| fault.c | ||
| flush.c | ||
| hugetlbpage.c | ||
| init.c | ||
| ioremap.c | ||
| kasan_init.c | ||
| Makefile | ||
| mm.h | ||
| mmap.c | ||
| mmu.c | ||
| pageattr.c | ||
| pgd.c | ||
| proc-macros.S | ||
| proc.S | ||