From: catalin.marinas@arm•com (Catalin Marinas)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v3 RESEND 14/17] ARM: LPAE: accomodate >32-bit addresses for page table base
Date: Mon, 24 Sep 2012 16:17:26 +0100 [thread overview]
Message-ID: <20120924151726.GB14198@arm.com> (raw)
In-Reply-To: <1348242975-19184-15-git-send-email-cyril@ti.com>
On Fri, Sep 21, 2012 at 04:56:12PM +0100, Cyril Chemparathy wrote:
> This patch redefines the early boot time use of the R4 register to steal a few
> low order bits (ARCH_PGD_SHIFT bits) on LPAE systems. This allows for up to
> 38-bit physical addresses.
That's fine. We figured out that on the vexpress with A15 and sparsemem
enabled could only use 36-bit because of section number stored in the
top bits of page->flags.
An alternative to this patch could be to always patch in the upper
32-bit of phys_offset like you do in virt_to_phys(). We know that pgd is
always lowmem.
--
Catalin
next prev parent reply other threads:[~2012-09-24 15:17 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-21 15:55 [PATCH v3 RESEND 00/17] LPAE fixes and extensions for Keystone Cyril Chemparathy
2012-09-21 15:55 ` [PATCH v3 RESEND 01/17] ARM: add mechanism for late code patching Cyril Chemparathy
2012-09-22 15:10 ` Nicolas Pitre
2012-09-22 21:41 ` Cyril Chemparathy
2012-09-24 12:06 ` Dave Martin
2012-09-24 14:49 ` Cyril Chemparathy
2012-09-24 15:54 ` Dave Martin
2012-09-21 15:56 ` [PATCH v3 RESEND 02/17] ARM: add self test for runtime patch mechanism Cyril Chemparathy
2012-09-21 15:56 ` [PATCH v3 RESEND 03/17] ARM: use late patch framework for phys-virt patching Cyril Chemparathy
2012-09-21 15:56 ` [PATCH v3 RESEND 04/17] ARM: LPAE: use phys_addr_t on virt <--> phys conversion Cyril Chemparathy
2012-09-24 13:09 ` Catalin Marinas
2012-09-24 13:57 ` Cyril Chemparathy
2012-09-21 15:56 ` [PATCH v3 RESEND 05/17] ARM: LPAE: support 64-bit virt_to_phys patching Cyril Chemparathy
2012-09-22 15:24 ` Nicolas Pitre
2012-09-24 15:13 ` Catalin Marinas
2012-09-24 15:56 ` Nicolas Pitre
2012-09-24 20:59 ` Cyril Chemparathy
2012-09-24 21:20 ` Nicolas Pitre
2012-09-24 21:52 ` Catalin Marinas
2012-09-24 22:32 ` Nicolas Pitre
2012-09-24 22:40 ` Russell King - ARM Linux
2012-09-24 22:53 ` Cyril Chemparathy
2012-09-24 23:03 ` Nicolas Pitre
2012-09-24 23:08 ` Russell King - ARM Linux
2012-09-24 22:55 ` Nicolas Pitre
2012-09-25 12:55 ` Dave Martin
2012-09-25 13:53 ` Catalin Marinas
2012-09-24 21:53 ` Cyril Chemparathy
2012-09-24 22:06 ` Russell King - ARM Linux
2012-09-24 16:31 ` Dave Martin
2012-09-24 16:51 ` Nicolas Pitre
2012-09-21 15:56 ` [PATCH v3 RESEND 06/17] ARM: LPAE: use signed arithmetic for mask definitions Cyril Chemparathy
2012-09-24 13:09 ` Catalin Marinas
2012-09-24 13:54 ` Russell King - ARM Linux
2012-09-21 15:56 ` [PATCH v3 RESEND 07/17] ARM: LPAE: use phys_addr_t in alloc_init_pud() Cyril Chemparathy
2012-09-24 13:10 ` Catalin Marinas
2012-09-21 15:56 ` [PATCH v3 RESEND 08/17] ARM: LPAE: use phys_addr_t in free_memmap() Cyril Chemparathy
2012-09-24 13:29 ` Catalin Marinas
2012-09-24 13:41 ` Russell King - ARM Linux
2012-09-24 15:09 ` Cyril Chemparathy
2012-09-24 15:22 ` Russell King - ARM Linux
2012-09-24 16:41 ` Cyril Chemparathy
2012-09-24 16:51 ` Catalin Marinas
2012-09-24 17:06 ` Cyril Chemparathy
2012-09-24 17:14 ` Russell King - ARM Linux
2012-09-25 13:08 ` Catalin Marinas
2012-09-25 13:30 ` Russell King - ARM Linux
2012-09-24 16:55 ` Russell King - ARM Linux
2012-09-24 17:03 ` Catalin Marinas
2012-09-21 15:56 ` [PATCH v3 RESEND 09/17] ARM: LPAE: use phys_addr_t for initrd location and size Cyril Chemparathy
2012-09-24 13:30 ` Catalin Marinas
2012-09-24 13:38 ` Russell King - ARM Linux
2012-09-24 14:00 ` Cyril Chemparathy
2012-09-21 15:56 ` [PATCH v3 RESEND 10/17] ARM: LPAE: use phys_addr_t in switch_mm() Cyril Chemparathy
2012-09-24 14:05 ` Catalin Marinas
2012-09-24 14:32 ` Cyril Chemparathy
2012-09-21 15:56 ` [PATCH v3 RESEND 11/17] ARM: LPAE: use 64-bit accessors for TTBR registers Cyril Chemparathy
2012-09-24 14:10 ` Catalin Marinas
2012-09-21 15:56 ` [PATCH v3 RESEND 12/17] ARM: LPAE: define ARCH_LOW_ADDRESS_LIMIT for bootmem Cyril Chemparathy
2012-09-24 14:16 ` Catalin Marinas
2012-09-21 15:56 ` [PATCH v3 RESEND 13/17] ARM: LPAE: factor out T1SZ and TTBR1 computations Cyril Chemparathy
2012-09-24 14:45 ` Catalin Marinas
2012-09-24 14:58 ` Cyril Chemparathy
2012-09-21 15:56 ` [PATCH v3 RESEND 14/17] ARM: LPAE: accomodate >32-bit addresses for page table base Cyril Chemparathy
2012-09-24 15:17 ` Catalin Marinas [this message]
2012-09-21 15:56 ` [PATCH v3 RESEND 15/17] ARM: mm: use physical addresses in highmem sanity checks Cyril Chemparathy
2012-09-24 15:18 ` Catalin Marinas
2012-09-21 15:56 ` [PATCH v3 RESEND 16/17] ARM: mm: cleanup checks for membank overlap with vmalloc area Cyril Chemparathy
2012-09-21 15:56 ` [PATCH v3 RESEND 17/17] ARM: mm: clean up membank size limit checks Cyril Chemparathy
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