Commit 6a3fd402 authored Oct 19, 2015 by Suzuki K. Poulose Committed by Catalin Marinas Oct 19, 2015

arm64: Handle 4 level page table for swapper



At the moment, we only support maximum of 3-level page table for
swapper. With 48bit VA, 64K has only 3 levels and 4K uses section
mapping. Add support for 4-level page table for swapper, needed
by 16K pages.

Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent c265af51

arch/arm64/kernel/head.S

+4 −1

Original line number	Diff line number	Diff line
		@@ -271,7 +271,10 @@ ENDPROC(preserve_boot_args)
		*/
		.macro create_pgd_entry, tbl, virt, tmp1, tmp2
		create_table_entry \tbl, \virt, PGDIR_SHIFT, PTRS_PER_PGD, \tmp1, \tmp2
		#if SWAPPER_PGTABLE_LEVELS == 3
		#if SWAPPER_PGTABLE_LEVELS > 3
		create_table_entry \tbl, \virt, PUD_SHIFT, PTRS_PER_PUD, \tmp1, \tmp2
		#endif
		#if SWAPPER_PGTABLE_LEVELS > 2
		create_table_entry \tbl, \virt, SWAPPER_TABLE_SHIFT, PTRS_PER_PTE, \tmp1, \tmp2
		#endif
		.endm

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