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arm64: introduce KIMAGE_VADDR as the virtual base of the kernel region

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This introduces the preprocessor symbol KIMAGE_VADDR which will serve as
the symbolic virtual base of the kernel region, i.e., the kernel's virtual
offset will be KIMAGE_VADDR + TEXT_OFFSET. For now, we define it as being
equal to PAGE_OFFSET, but in the future, it will be moved below it once
we move the kernel virtual mapping out of the linear mapping.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Ard Biesheuvel
2016-02-16 13:52:36 +01:00
committed by Catalin Marinas
parent 324420bf91
commit ab893fb9f1
3 changed files with 11 additions and 5 deletions
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4
arch/arm64/kernel/vmlinux.lds.S
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@@ -89,7 +89,7 @@ SECTIONS
*(.discard.*)
}
. = PAGE_OFFSET + TEXT_OFFSET;
. = KIMAGE_VADDR + TEXT_OFFSET;
.head.text : {
_text = .;
@@ -186,4 +186,4 @@ ASSERT(__idmap_text_end - (__idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K,
/*
* If padding is applied before .head.text, virt<->phys conversions will fail.
*/
ASSERT(_text == (PAGE_OFFSET + TEXT_OFFSET), "HEAD is misaligned")
ASSERT(_text == (KIMAGE_VADDR + TEXT_OFFSET), "HEAD is misaligned")