This is a followup to Catalin's series 'arm64: Avoid overlapping EFI regions' whose aim was to get rid of the split_pmd() and split_pud() routines in mm/mmu.c, which may violate the architecture when used in the wrong way. This series updates the MMU mapping routines invoked by the code that sets up the UEFI runtime services environment so that regions that may be subject to splitting are always mapped down to pages. On the one hand, these are regions that are covered by the Memory Attributes table as well as the UEFI memory map, in which case we need to map down to pages in the first pass to ensure that the more granular permission attributes do not require splitting block entries. On the other hand, any region that is not aligned to the OS's page size is mapped down to pages as well, so that the page such a region may share with the next region is always mapped using pages, and no splitting is required for mapping the second region. Finally, remove the split_pmd() and split_pud() routines. Patch #5 is a cleanup patch, [0] http://thread.gmane.org/gmane.linux.kernel.efi/8649 Ard Biesheuvel (4): arm64: mm: add param to force create_pgd_mapping() to use page mappings arm64: efi: always map runtime services code and data regions down to pages arm64: efi: avoid block mappings for unaligned UEFI memory regions arm64: mm: fold init_pgd() into __create_pgd_mapping() Catalin Marinas (1): arm64: mm: Remove split_p*d() functions arch/arm64/include/asm/efi.h | 3 +- arch/arm64/include/asm/mmu.h | 2 +- arch/arm64/kernel/efi.c | 50 +++++++- arch/arm64/mm/mmu.c | 126 +++++--------------- 4 files changed, 82 insertions(+), 99 deletions(-) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
