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Groups > linux.kernel > #1250698
| From | "Suzuki K. Poulose" <suzuki.poulose@arm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCHv4 04/12] arm64: Calculate size for idmap_pg_dir at compile time |
| Date | 2015-10-19 15:30 +0200 |
| Message-ID | <qliFK-5Ez-45@gated-at.bofh.it> (permalink) |
| References | <qliFI-5Ez-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Now that we can calculate the number of levels required for mapping a va width, reserve exact number of pages that would be required to cover the idmap. The idmap should be able to handle the maximum physical address size supported. 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> Acked-by: Mark Rutland <mark.rutland@arm.com> --- arch/arm64/include/asm/kernel-pgtable.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h index 4e08faa..a459714 100644 --- a/arch/arm64/include/asm/kernel-pgtable.h +++ b/arch/arm64/include/asm/kernel-pgtable.h @@ -39,16 +39,19 @@ * map to pte level. The swapper also maps the FDT (see __create_page_tables * for more information). Note that the number of ID map translation levels * could be increased on the fly if system RAM is out of reach for the default - * VA range, so 3 pages are reserved in all cases. + * VA range, so pages required to map highest possible PA are reserved in all + * cases. */ #if ARM64_SWAPPER_USES_SECTION_MAPS #define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1) +#define IDMAP_PGTABLE_LEVELS (ARM64_HW_PGTABLE_LEVELS(PHYS_MASK_SHIFT) - 1) #else #define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS) +#define IDMAP_PGTABLE_LEVELS (ARM64_HW_PGTABLE_LEVELS(PHYS_MASK_SHIFT)) #endif #define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE) -#define IDMAP_DIR_SIZE (3 * PAGE_SIZE) +#define IDMAP_DIR_SIZE (IDMAP_PGTABLE_LEVELS * PAGE_SIZE) /* Initial memory map size */ #if ARM64_SWAPPER_USES_SECTION_MAPS -- 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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[UPDATED] [PATCHv4 00/12] arm64: 16K translation granule support "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 03/12] arm64: Introduce helpers for page table levels "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 01/12] arm64: Move swapper pagetable definitions "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 11/12] arm64: Add 16K page size support "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 10/12] arm64: Add page size to the kernel image header "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 08/12] arm64: Kconfig: Fix help text about AArch32 support with 64K pages "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 04/12] arm64: Calculate size for idmap_pg_dir at compile time "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 06/12] arm64: Clean config usages for page size "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 12/12] arm64: 36 bit VA "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
[PATCHv4 09/12] arm64: Check for selected granule support "Suzuki K. Poulose" <suzuki.poulose@arm.com> - 2015-10-19 15:30 +0200
Re: [UPDATED] [PATCHv4 00/12] arm64: 16K translation granule support Mark Rutland <mark.rutland@arm.com> - 2015-10-19 18:40 +0200
Re: [UPDATED] [PATCHv4 00/12] arm64: 16K translation granule support Catalin Marinas <catalin.marinas@arm.com> - 2015-10-19 19:40 +0200
Re: [UPDATED] [PATCHv4 00/12] arm64: 16K translation granule support "Suzuki K. Poulose" <Suzuki.Poulose@arm.com> - 2015-10-19 19:50 +0200
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