From: Ralf Baechle <ralf@linux-mips.org>
To: "Steven J. Hill" <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Subject: Re: [PATCH 02/11] MIPS: Revert fixrange_init() limiting to the FIXMAP region.
Date: Thu, 13 Nov 2014 12:13:49 +0100 [thread overview]
Message-ID: <20141113111349.GC13753@linux-mips.org> (raw)
In-Reply-To: <1415858743-24492-3-git-send-email-Steven.Hill@imgtec.com>
On Thu, Nov 13, 2014 at 12:05:34AM -0600, Steven J. Hill wrote:
> From: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
>
> This patch refactors commit 464fd83e841a16f4ea1325b33eb08170ef5cd1f4
> (MIPS: Limit fixrange_init() to the FIXMAP region) and correctly
> calculates the right length while taking into account page table
> alignment by PMD.
In that commit Kevin wrote:
MIPS: Limit fixrange_init() to the FIXMAP region
fixrange_init() allocates page tables for all addresses higher than
FIXADDR_TOP. On processors that override the default FIXADDR_TOP
address of 0xfffe_0000, this can consume up to 4 pages (1 page per 4MB)
for pgd's that are never used.
And that's all also reintroduced. Think of bx 63xx which defines FIXADDR_TOP
as 0xff000000. Blindly rounding up to 0 for the end address doesn't cut it.
Ralf
next prev parent reply other threads:[~2014-11-13 11:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-13 6:05 [PATCH 00/11] Add support for eXtended Physical Addressing Steven J. Hill
2014-11-13 6:05 ` [PATCH 01/11] MIPS: HIGHMEM fixes for cache aliasing and non-DMA I/O Steven J. Hill
2014-11-13 6:05 ` [PATCH 02/11] MIPS: Revert fixrange_init() limiting to the FIXMAP region Steven J. Hill
2014-11-13 11:13 ` Ralf Baechle [this message]
2014-11-13 6:05 ` [PATCH 03/11] MIPS: Rearrange PTE bits into fixed positions for MIPS R2 Steven J. Hill
2014-11-13 6:05 ` [PATCH 04/11] MIPS: Removal of execute bit in page tables for HEAP/BSS Steven J. Hill
2014-11-13 11:36 ` Ralf Baechle
2014-11-13 6:05 ` [PATCH 05/11] MIPS: mm: c-r4k: Ensure CCA is set to non-coherent on UP kernels Steven J. Hill
2014-11-13 10:31 ` Ralf Baechle
2014-11-13 6:05 ` [PATCH 06/11] MIPS: Add CP0 macros for extended EntryLo registers Steven J. Hill
2014-11-13 12:25 ` Sergei Shtylyov
2014-11-13 6:05 ` [PATCH 07/11] MIPS: Fix address type used for early memory detection Steven J. Hill
2014-11-13 6:05 ` [PATCH 08/11] MIPS: Cosmetic cleanups of page table headers Steven J. Hill
2014-11-13 6:05 ` [PATCH 09/11] MIPS: Add MFHC0 and MTHC0 instructions to uasm Steven J. Hill
2014-11-13 6:05 ` [PATCH 10/11] MIPS: Add support for XPA Steven J. Hill
2014-11-13 6:05 ` [PATCH 11/11] MIPS: XPA: Add new configuration file Steven J. Hill
2014-11-13 6:21 ` [PATCH 00/11] Add support for eXtended Physical Addressing Ralf Baechle
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