| From | "Suzuki K. Poulose" <> | Subject | [PATCHv3 05/11] arm64: Handle 4 level page table for swapper | Date | Wed, 14 Oct 2015 12:20:28 +0100 |
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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: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> 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> --- arch/arm64/kernel/head.S | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 149fce3..7ace955 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -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 -- 1.7.9.5
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