From: Suzuki K Poulose <suzuki.poulose@xxxxxxx> For a realm guest it will be necessary to ensure IO mappings are shared so that the VMM can emulate the device. The following patch will provide an implementation of set_fixmap_io for arm64 setting the shared bit (if in a realm). Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx> Signed-off-by: Steven Price <steven.price@xxxxxxx> --- New patch for v5 --- include/asm-generic/fixmap.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/asm-generic/fixmap.h b/include/asm-generic/fixmap.h index 29cab7947980..9b75fe2bd8fd 100644 --- a/include/asm-generic/fixmap.h +++ b/include/asm-generic/fixmap.h @@ -94,8 +94,10 @@ static inline unsigned long virt_to_fix(const unsigned long vaddr) /* * Some fixmaps are for IO */ +#ifndef set_fixmap_io #define set_fixmap_io(idx, phys) \ __set_fixmap(idx, phys, FIXMAP_PAGE_IO) +#endif #endif /* __ASSEMBLY__ */ #endif /* __ASM_GENERIC_FIXMAP_H */ -- 2.34.1
