From: arnd@arndb•de (Arnd Bergmann)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v15 08/12] ARM: config: append lpae configuration
Date: Thu, 31 Jul 2014 16:41:02 +0200 [thread overview]
Message-ID: <201407311641.02462.arnd@arndb.de> (raw)
In-Reply-To: <CAD6h2NT5BP4Rmz+vfTLSsw19xCNSfXE6wwAhr1Fcrd9VuyXOeg@mail.gmail.com>
On Thursday 31 July 2014, Haojian Zhuang wrote:
> Maybe I didn't express this well. Let's check the memory layout in hip04.
>
> <0x00000000-10000000, 0x00000000-c0000000> & <0x00000004-0xc0000000,
> 0x00000003-40000000> are two memory regions.
>
> These memory address is 64-bit. When ARM_LPAE is disabled,
> memblock_add() parses memory base address & size with 32-bit. Since
> ARCH_PHYS_ADDR_T_64BIT is highly depend on ARM_LPAE.
>
> Then these two memory regions become <0x10000000, 0xc0000000> &
> <0xc0000000, 0xffffffff>. Lots of IO space are in <0xe0000000,
> 0xefffffff>. So memory space conflicts when ARM_LPAE is disabled.
> Kernel panic will come since it believes IO space is memory.
>
> Only two solutions are available in below.
> 1. Use hip04_defconfig to declare ARM_LPAE.
> 2. Use hi3xxx_defconfig, and only declare 2.9GB memory in DTS file
> without ARM_LPAE.
>
> I think solution #1 is better. What's your opinion?
>
I think it's a bug in the DT parsing code if incorrect memory
regions get added. It's supposed to parse the memory nodes using
"long enough" (u64 or arbitrary-length) data types and then
skip every range that doesn't fit into phys_addr_t.
Arnd
next prev parent reply other threads:[~2014-07-31 14:41 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-28 13:57 [PATCH v15 00/12] enable Hisilicon HiP04 Haojian Zhuang
2014-07-28 13:57 ` [PATCH v15 01/12] irq: gic: support hip04 gic Haojian Zhuang
2014-07-28 17:38 ` Marc Zyngier
2014-07-29 13:05 ` Arnd Bergmann
2014-07-29 13:19 ` Will Deacon
2014-07-29 13:41 ` Marc Zyngier
2014-07-28 13:57 ` [PATCH v15 02/12] ARM: mcpm: support 4 clusters Haojian Zhuang
2014-07-28 13:57 ` [PATCH v15 03/12] ARM: hisi: enable MCPM implementation Haojian Zhuang
2014-07-28 13:57 ` [PATCH v15 04/12] ARM: hisi: enable HiP04 Haojian Zhuang
2014-07-28 14:38 ` Arnd Bergmann
2014-07-28 13:57 ` [PATCH v15 05/12] document: dt: add the binding on HiP04 Haojian Zhuang
2014-07-28 14:41 ` Arnd Bergmann
2014-07-28 13:57 ` [PATCH v15 06/12] document: dt: add the binding on HiP04 clock Haojian Zhuang
2014-07-28 17:54 ` Mark Rutland
2014-07-29 2:25 ` Haojian Zhuang
2014-07-29 9:55 ` Arnd Bergmann
2014-07-29 10:40 ` Haojian Zhuang
2014-07-29 12:38 ` Mark Rutland
2014-07-28 13:57 ` [PATCH v15 07/12] ARM: dts: append hip04 dts Haojian Zhuang
2014-07-28 18:06 ` Mark Rutland
2014-07-29 2:44 ` Haojian Zhuang
2014-07-29 3:53 ` Olof Johansson
2014-07-29 4:00 ` Olof Johansson
2014-08-01 12:02 ` Haojian Zhuang
2014-07-29 10:58 ` Haojian Zhuang
2014-07-29 16:56 ` Olof Johansson
2014-07-29 11:12 ` Will Deacon
2014-07-29 11:32 ` Haojian Zhuang
2014-07-29 12:13 ` Will Deacon
2014-07-29 12:15 ` Haojian Zhuang
2014-07-29 12:22 ` Will Deacon
2014-07-29 12:32 ` Mark Rutland
2014-07-29 17:01 ` Olof Johansson
2014-07-29 17:33 ` Mark Rutland
2014-07-30 11:26 ` Leif Lindholm
2014-07-28 13:57 ` [PATCH v15 08/12] ARM: config: append lpae configuration Haojian Zhuang
2014-07-29 4:05 ` Olof Johansson
2014-07-29 10:43 ` Haojian Zhuang
2014-07-31 1:01 ` Olof Johansson
2014-07-31 2:24 ` Haojian Zhuang
2014-07-31 3:55 ` Olof Johansson
2014-07-31 5:30 ` Haojian Zhuang
2014-07-31 14:41 ` Arnd Bergmann [this message]
2014-08-01 12:16 ` Haojian Zhuang
2014-07-28 13:57 ` [PATCH v15 09/12] ARM: config: append hip04_defconfig Haojian Zhuang
2014-07-29 4:07 ` Olof Johansson
2014-07-28 13:57 ` [PATCH v15 10/12] ARM: hisi: enable erratum 798181 of A15 on HiP04 Haojian Zhuang
2014-07-29 4:08 ` Olof Johansson
2014-07-29 10:41 ` Haojian Zhuang
2014-07-28 13:57 ` [PATCH v15 11/12] virt: arm: support hip04 gic Haojian Zhuang
2014-07-28 18:00 ` Marc Zyngier
2014-07-29 2:31 ` Haojian Zhuang
2014-07-29 8:47 ` Marc Zyngier
2014-07-28 13:57 ` [PATCH v15 12/12] ARM: debug: add HiP04 debug uart Haojian Zhuang
2014-07-28 14:43 ` [PATCH v15 00/12] enable Hisilicon HiP04 Arnd Bergmann
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