arm64: efi: prefer AllocatePages() over efi_low_alloc() for vmlinux

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When allocating memory for the kernel image, try the AllocatePages()
boot service to obtain memory at the preferred offset of
'dram_base + TEXT_OFFSET', and only revert to efi_low_alloc() if that
fails. This is the only way to allocate at the base of DRAM if DRAM
starts at 0x0, since efi_low_alloc() refuses to allocate at 0x0.

Tested-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Ard Biesheuvel 2015-07-24 12:38:27 +01:00 • committed by Will Deacon

parent e094d44568

commit e38457c361

1 changed files with 32 additions and 9 deletions

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arch/arm64/kernel/efi-stub.c

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