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From: "Jonathan Neuschäfer" <j.neuschaefer@gmx.net>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	j.neuschaefer@gmx.net, linux-kernel@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v1 03/13] powerpc/mm/32s: rework mmu_mapin_ram()
Date: Mon, 3 Dec 2018 22:55:58 +0100	[thread overview]
Message-ID: <20181203215558.GK15324@latitude> (raw)
In-Reply-To: <8835330baa77d88e0267b0b1215b78c991e6d17a.1543517818.git.christophe.leroy@c-s.fr>

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Hi,

On Thu, Nov 29, 2018 at 07:00:16PM +0000, Christophe Leroy wrote:
> This patch reworks mmu_mapin_ram() to be more generic and map as much
> blocks as possible. It now supports blocks not starting at address 0.
> 
> It scans DBATs array to find free ones instead of forcing the use of
> BAT2 and BAT3.
> 
> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
> ---

I've just tested this series on my Wii, and starting from this patch
(03/13), it hangs at the following lines of output:

[    0.000000] printk: bootconsole [udbg0] enabled
[    0.000000] Total memory = 319MB; using 1024kB for hash table (at (ptrval))

Before this patch it looks like this and boots to userspace:

[    0.000000] printk: bootconsole [udbg0] enabled
[    0.000000] Total memory = 319MB; using 1024kB for hash table (at (ptrval))
[    0.000000] Linux version 4.20.0-rc5-wii-00022-gfbb911b84755 (jn@longitude) (gcc version 8.2.0 (Debian 8.2.0-9)) #1337 PREEMPT Mon Dec 3 21:49:02 CET 2018
ug_udbg_init: early -> final
usbgecko_udbg: ready
[    0.000000] Using wii machine description
...

I've tested at patch 1, 2, 3, 4, and 13, so I don't know if it works
somewhere in the middle, but probably not.

(And in case you're wondering about the 22 in the version string: Those
are mostly patches that give me a serial console.)

I'm not sure what is going on, because I haven't looked closely at the
patches or tried to debug the problem. If you have some debugging tips,
I can try them.


Jonathan Neuschäfer

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  reply	other threads:[~2018-12-03 21:56 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-29 19:00 [PATCH v1 00/13] powerpc/32s: Use BATs for STRICT_KERNEL_RWX Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 01/13] powerpc/mm: add exec protection on powerpc 603 Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 02/13] powerpc/mm/32: add base address to mmu_mapin_ram() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 03/13] powerpc/mm/32s: rework mmu_mapin_ram() Christophe Leroy
2018-12-03 21:55   ` Jonathan Neuschäfer [this message]
2018-12-13 12:16     ` Christophe Leroy
2018-12-13 14:51       ` Christophe Leroy
2018-12-17  1:28         ` Jonathan Neuschäfer
2018-12-17  9:29           ` Christophe Leroy
2018-12-18  3:05             ` Jonathan Neuschäfer
2018-12-18  9:18               ` Christophe Leroy
2018-12-18 14:07                 ` Jonathan Neuschäfer
2018-12-18 14:15                   ` Christophe Leroy
2018-12-18 14:55                     ` Christophe Leroy
2018-12-18 15:04                       ` Christophe Leroy
2018-12-18 17:04                         ` Jonathan Neuschäfer
2018-12-18 18:13                           ` Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 04/13] powerpc/mm/32s: use generic mmu_mapin_ram() for all blocks Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 05/13] powerpc/wii: remove wii_mmu_mapin_mem2() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 06/13] powerpc/mm/32s: use _PAGE_EXEC in setbat() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 07/13] powerpc/mm/32s: add setibat() clearibat() and update_bats() Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 08/13] powerpc/32: add helper to write into segment registers Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 09/13] powerpc/mmu: add is_strict_kernel_rwx() helper Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 10/13] powerpc/kconfig: define PAGE_SHIFT inside Kconfig Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 11/13] powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 12/13] powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX Christophe Leroy
2018-11-29 19:00 ` [PATCH v1 13/13] powerpc/kconfig: make _etext and data areas alignment configurable on Book3s 32 Christophe Leroy

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