From: Sam Ravnborg <sam@ravnborg.org>
To: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH v3 23/28] ARM: mmu: Make sure that address is 1M aligned in arm_create_pte()
Date: Fri, 18 May 2018 22:23:15 +0200 [thread overview]
Message-ID: <20180518202315.GB26895@ravnborg.org> (raw)
In-Reply-To: <20180517205837.32421-24-andrew.smirnov@gmail.com>
On Thu, May 17, 2018 at 01:58:32PM -0700, Andrey Smirnov wrote:
> If address passed arm_create_pte() is not 1M (PGDIR_SIZE) aligned,
> page table that is created will end up having unexpected mapping
> offset, breaking "1:1 mapping" assumption and leading to bugs that are
> not immediately obvious in their nature.
>
> To prevent this and because all of the callers already do said
> alignement in-place, move the alignment code to be a part of
alignment
> are_create_pte().
arm_create_pte()
It is so easy to spot spelling errors made by others,
so why is it that one so often fails to find spelling
errors made by one self :-(
Sam
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next prev parent reply other threads:[~2018-05-18 20:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-17 20:58 [PATCH v3 00/28] ARM MMU code improvements and on-demand PTE allocation Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 01/28] ARM: mmu: Remove unused ARM_VECTORS_SIZE Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 02/28] ARM: mmu: Make use of IS_ALIGNED in arm_mmu_remap_sdram() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 03/28] ARM: mmu: Use ALIGN and ALIGN_DOWN in map_cachable() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 04/28] ARM: mmu: Introduce set_ttbr() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 05/28] ARM: mmu: Introduce set_domain() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 06/28] ARM: mmu: Share code for create_sections() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 07/28] ARM: mmu: Separate index and address in create_sections() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 08/28] sizes.h: Sync with Linux 4.16 Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 09/28] ARM: mmu: Specify size in bytes in create_sections() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 10/28] ARM: mmu: Share code for initial flat mapping creation Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 11/28] ARM: mmu: Share PMD_SECT_DEF_CACHED Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 12/28] ARM: mmu: Drop needless shifting in map_io_sections() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 13/28] ARM: mmu: Replace hardcoded shifts with pgd_index() from Linux Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 14/28] ARM: mmu: Trivial simplification in arm_mmu_remap_sdram() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 15/28] ARM: mmu: Replace various SZ_1M with PGDIR_SIZE Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 16/28] ARM: mmu: Use PAGE_SIZE when specifying size of one page Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 17/28] ARM: mmu: Define and use PTRS_PER_PTE Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 18/28] ARM: mmu: Use PAGE_SIZE instead of magic right shift by 12 Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 19/28] ARM: mmu: Use xmemalign in arm_create_pte() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 20/28] ARM: mmu: Use xmemalign in mmu_init() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 21/28] ARM: mmu: Share code between dma_alloc_*() functions Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 22/28] ARM: mmu: Pass PTE flags a parameter to arm_create_pte() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 23/28] ARM: mmu: Make sure that address is 1M aligned in arm_create_pte() Andrey Smirnov
2018-05-18 20:23 ` Sam Ravnborg [this message]
2018-05-21 19:12 ` Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 24/28] ARM: mmu: Use find_pte() to find PTE in create_vector_table() Andrey Smirnov
2018-05-18 20:41 ` Sam Ravnborg
2018-05-18 23:30 ` Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 25/28] ARM: mmu: Use dma_inv_range() in dma_sync_single_for_cpu() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 26/28] ARM: mmu: Simplify the use of dma_flush_range() Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 27/28] ARM: mmu: Implement on-demand PTE allocation Andrey Smirnov
2018-05-17 20:58 ` [PATCH v3 28/28] ARM: mmu: Introduce ARM_TTB_SIZE Andrey Smirnov
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