Re: [PATCH v4 04/14] arm64, mm: Move generic mmap layout functions to mm

[PATCH v4 00/14] Provide generic top-down mmap layout functions · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 01/14] mm, fs: Move randomize_stack_top from fs to mm · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 02/14] arm64: Make use of is_compat_task instead of hardcoding this test · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 02/14] arm64: Make use of is_compat_task instead of hardcoding this test · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
[PATCH v4 03/14] arm64: Consider stack randomization for mmap base only when necessary · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 03/14] arm64: Consider stack randomization for mmap base only when necessary · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
[PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Christoph Hellwig <hch@lst.de> · 2019-06-01
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Alexandre Ghiti <alex@ghiti.fr> · 2019-06-03
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
Re: [PATCH v4 05/14] arm64, mm: Make randomization selected by generic topdown mmap layout · Alex Ghiti <alex@ghiti.fr> · 2019-06-04
[PATCH v4 06/14] arm: Properly account for stack randomization and stack guard gap · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 07/14] arm: Use STACK_TOP when computing mmap base address · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 08/14] arm: Use generic mmap top-down layout and brk randomization · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 08/14] arm: Use generic mmap top-down layout and brk randomization · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 08/14] arm: Use generic mmap top-down layout and brk randomization · Alex Ghiti <alex@ghiti.fr> · 2019-05-31
[PATCH v4 09/14] mips: Properly account for stack randomization and stack guard gap · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 10/14] mips: Use STACK_TOP when computing mmap base address · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 11/14] mips: Adjust brk randomization offset to fit generic version · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 11/14] mips: Adjust brk randomization offset to fit generic version · Kees Cook <hidden> · 2019-05-29
[PATCH v4 12/14] mips: Replace arch specific way to determine 32bit task with generic version · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 12/14] mips: Replace arch specific way to determine 32bit task with generic version · Kees Cook <hidden> · 2019-05-29
[PATCH v4 13/14] mips: Use generic mmap top-down layout and brk randomization · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 13/14] mips: Use generic mmap top-down layout and brk randomization · Kees Cook <hidden> · 2019-05-29
[PATCH v4 14/14] riscv: Make mmap allocation top-down by default · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
[PATCH v4 04/14] arm64, mm: Move generic mmap layout functions to mm · Alexandre Ghiti <alex@ghiti.fr> · 2019-05-26
Re: [PATCH v4 04/14] arm64, mm: Move generic mmap layout functions to mm · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 04/14] arm64, mm: Move generic mmap layout functions to mm · Catalin Marinas <catalin.marinas@arm.com> · 2019-06-03
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Kees Cook <hidden> · 2019-05-29
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Alex Ghiti <alex@ghiti.fr> · 2019-05-31
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Alex Ghiti <alex@ghiti.fr> · 2019-06-13
Re: [PATCH v4 00/14] Provide generic top-down mmap layout functions · Alex Ghiti <alex@ghiti.fr> · 2019-06-30

From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2019-06-03 17:38:50
Also in: linux-fsdevel, linux-mips, linux-mm, linux-riscv, lkml

On Sun, May 26, 2019 at 09:47:36AM -0400, Alexandre Ghiti wrote:

arm64 handles top-down mmap layout in a way that can be easily reused
by other architectures, so make it available in mm.
It then introduces a new config ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
that can be set by other architectures to benefit from those functions.
Note that this new config depends on MMU being enabled, if selected
without MMU support, a warning will be thrown.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

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