diff options
Diffstat (limited to 'arch/arm64/include/asm/sparsemem.h')
| -rw-r--r-- | arch/arm64/include/asm/sparsemem.h | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/sparsemem.h b/arch/arm64/include/asm/sparsemem.h index 1f43fcc79738..84783efdc9d1 100644 --- a/arch/arm64/include/asm/sparsemem.h +++ b/arch/arm64/include/asm/sparsemem.h @@ -5,9 +5,28 @@ #ifndef __ASM_SPARSEMEM_H #define __ASM_SPARSEMEM_H -#ifdef CONFIG_SPARSEMEM -#define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS -#define SECTION_SIZE_BITS 30 -#endif +#include <asm/pgtable-prot.h> + +#define MAX_PHYSMEM_BITS PHYS_MASK_SHIFT +#define MAX_POSSIBLE_PHYSMEM_BITS (52) + +/* + * Section size must be at least 512MB for 64K base + * page size config. Otherwise it will be less than + * MAX_PAGE_ORDER and the build process will fail. + */ +#ifdef CONFIG_ARM64_64K_PAGES +#define SECTION_SIZE_BITS 29 + +#else + +/* + * Section size must be at least 128MB for 4K base + * page size config. Otherwise PMD based huge page + * entries could not be created for vmemmap mappings. + * 16K follows 4K for simplicity. + */ +#define SECTION_SIZE_BITS 27 +#endif /* CONFIG_ARM64_64K_PAGES */ #endif |