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Groups > linux.kernel > #1250678 > unrolled thread
| Started by | "Suzuki K. Poulose" <suzuki.poulose@arm.com> |
|---|---|
| First post | 2015-10-19 15:30 +0200 |
| Last post | 2015-10-19 15:30 +0200 |
| Articles | 1 — 1 participant |
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[PATCHv4 05/12] arm64: Handle 4 level page table for swapper "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
| From | "Suzuki K. Poulose" <suzuki.poulose@arm.com> |
|---|---|
| Date | 2015-10-19 15:30 +0200 |
| Subject | [PATCHv4 05/12] arm64: Handle 4 level page table for swapper |
| Message-ID | <qliFI-5Ez-13@gated-at.bofh.it> |
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: 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> Acked-by: Mark Rutland <mark.rutland@arm.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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