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arm64: ignore DT memreserve entries when booting in UEFI mode

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UEFI provides its own method for marking regions to reserve, via the
memory map which is also used to initialise memblock. So when using the
UEFI memory map, ignore any memreserve entries present in the DT.

Reported-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Leif Lindholm 2014-07-28 19:03:03 +01:00 committed by Will Deacon
parent 49d947face
commit 86c8b27a01
2 changed files with 5 additions and 1 deletions
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2
arch/arm64/kernel/efi.c
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@ -188,6 +188,8 @@ static __init void reserve_regions(void)
if (uefi_debug)
pr_cont("\n");
}
set_bit(EFI_MEMMAP, &efi.flags);
}

4
arch/arm64/mm/init.c
View File

@ -32,6 +32,7 @@
#include <linux/of_fdt.h>
#include <linux/dma-mapping.h>
#include <linux/dma-contiguous.h>
#include <linux/efi.h>
#include <asm/fixmap.h>
#include <asm/sections.h>
@ -148,7 +149,8 @@ void __init arm64_memblock_init(void)
memblock_reserve(__virt_to_phys(initrd_start), initrd_end - initrd_start);
#endif
early_init_fdt_scan_reserved_mem();
if (!efi_enabled(EFI_MEMMAP))
early_init_fdt_scan_reserved_mem();
/* 4GB maximum for 32-bit only capable devices */
if (IS_ENABLED(CONFIG_ZONE_DMA))