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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2016-04-25 21:07:02 +0100
committerIngo Molnar <mingo@kernel.org>2016-04-28 11:34:05 +0200
commit249f7632162980b286f30166436471f8ba81fc1e (patch)
tree7d8c373838fc908b9181d6f42487e7cf7d74b346
parent65117f1aa1b2d145fd5ca376bde642794d0aae1b (diff)
downloadlinux-249f7632162980b286f30166436471f8ba81fc1e.tar.bz2
efi/arm-init: Reserve rather than unmap the memory map for ARM as well
Now that ARM has a fully functional memremap() implementation, there is no longer a need to remove the UEFI memory map from the linear mapping in order to be able to create a permanent mapping for it using generic code. So remove the 'IS_ENABLED(CONFIG_ARM)' conditional we added in: 7cc8cbcf82d1 ("efi/arm64: Don't apply MEMBLOCK_NOMAP to UEFI memory map mapping") ... and revert to using memblock_reserve() for both ARM and arm64. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Leif Lindholm <leif.lindholm@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1461614832-17633-31-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--drivers/firmware/efi/arm-init.c17
1 files changed, 3 insertions, 14 deletions
diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c
index 7a3318dd4319..ef90f0c4b70a 100644
--- a/drivers/firmware/efi/arm-init.c
+++ b/drivers/firmware/efi/arm-init.c
@@ -244,20 +244,9 @@ void __init efi_init(void)
efi_memattr_init();
early_memunmap(efi.memmap.map, params.mmap_size);
- if (IS_ENABLED(CONFIG_ARM)) {
- /*
- * ARM currently does not allow ioremap_cache() to be called on
- * memory regions that are covered by struct page. So remove the
- * UEFI memory map from the linear mapping.
- */
- memblock_mark_nomap(params.mmap & PAGE_MASK,
- PAGE_ALIGN(params.mmap_size +
- (params.mmap & ~PAGE_MASK)));
- } else {
- memblock_reserve(params.mmap & PAGE_MASK,
- PAGE_ALIGN(params.mmap_size +
- (params.mmap & ~PAGE_MASK)));
- }
+ memblock_reserve(params.mmap & PAGE_MASK,
+ PAGE_ALIGN(params.mmap_size +
+ (params.mmap & ~PAGE_MASK)));
init_screen_info();
}