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author | Ard Biesheuvel | 2016-06-29 14:51:28 +0200 |
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committer | Catalin Marinas | 2016-07-01 12:56:26 +0200 |
commit | 74c102c988cd48fff8055a0bfb84234fd3509419 (patch) | |
tree | 40d2b6b8b1fa26e847e5585244815b73687bc70a /arch/arm64/mm/mmu.c | |
parent | arm64: efi: always map runtime services code and data regions down to pages (diff) | |
download | kernel-qcow2-linux-74c102c988cd48fff8055a0bfb84234fd3509419.tar.gz kernel-qcow2-linux-74c102c988cd48fff8055a0bfb84234fd3509419.tar.xz kernel-qcow2-linux-74c102c988cd48fff8055a0bfb84234fd3509419.zip |
arm64: efi: avoid block mappings for unaligned UEFI memory regions
When running the OS with a page size > 4 KB, we need to round up mappings
for regions that are not aligned to the OS's page size. We already avoid
block mappings for EfiRuntimeServicesCode/Data regions for other reasons,
but in the unlikely event that other unaliged regions exists that have the
EFI_MEMORY_RUNTIME attribute set, ensure that unaligned regions are always
mapped down to pages. This way, the overlapping page is guaranteed not to
be covered by a block mapping that needs to be split.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/mm/mmu.c')
0 files changed, 0 insertions, 0 deletions