linux-kernel - Re: next: fuloong2e qemu boot failure due to 'MIPS: Loongson: AddLoongson-3A R2 basic support'

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Date:	Thu, 12 May 2016 20:46:59 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Huacai Chen <chenhc@...ote.com>
Cc:	Ralf Baechle <ralf@...ux-mips.org>,
	linux-mips <linux-mips@...ux-mips.org>,
	linux-next <linux-next@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: next: fuloong2e qemu boot failure due to 'MIPS: Loongson:
 AddLoongson-3A R2 basic support'

On 04/19/2016 10:41 PM, Huacai Chen wrote:
> This is a kernel bug, I'll send a patch.
>

Did you ever send a patch to fix this problem ? It is still broken in next-20160512.

Guenter

> Huacai
>
> On Wed, Apr 20, 2016 at 12:43 PM, Guenter Roeck <linux@...ck-us.net> wrote:
>> On 04/19/2016 08:37 PM, 陈华才 wrote:
>>>
>>> Hi,
>>>
>>> Could you please remove the line "#define cpu_hwrena_impl_bits
>>> 0xc0000000" in arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
>>> and try again?Thanks.
>>>
>>
>> That fixes the problem.
>>
>> Does this need to be addressed in qemu or in the Linux kernel ?
>>
>> Thanks,
>> Guenter
>>
>>
>>> Huacai
>>>
>>> ------------------ Original ------------------
>>> From:  "Guenter Roeck"<linux@...ck-us.net>;
>>> Date:  Wed, Apr 20, 2016 10:54 AM
>>> To:  "Huacai Chen"<chenhc@...ote.com>;
>>> Cc:  "Ralf Baechle"<ralf@...ux-mips.org>;
>>> "linux-mips"<linux-mips@...ux-mips.org>;
>>> "linux-next"<linux-next@...r.kernel.org>;
>>> "linux-kernel"<linux-kernel@...r.kernel.org>;
>>> Subject:  next: fuloong2e qemu boot failure due to 'MIPS: Loongson:
>>> AddLoongson-3A R2 basic support'
>>>
>>> Hi,
>>>
>>> qemu fails to boot in -next for machine fulong2e with configuration
>>> fuloong2e_defconfig. Bisect points to commit 'MIPS: Loongson: Add
>>> Loongson-3A R2 basic support'. qemu hangs in boot, after displaying
>>> "Inode-cache hash table entries: 16384 (order: 3, 131072 bytes)".
>>>
>>> Bisect log is attached.
>>>
>>> Guenter
>>>
>>> ---
>>> # bad: [1bd7a2081d2c7b096f75aa934658e404ccaba5fd] Add linux-next specific
>>> files for 20160418
>>> # good: [bf16200689118d19de1b8d2a3c314fc21f5dc7bb] Linux 4.6-rc3
>>> git bisect start 'HEAD' 'v4.6-rc3'
>>> # bad: [493ac92ff65ec4c4cd4c43870e778760a012951d] Merge remote-tracking
>>> branch 'ipvs-next/master'
>>> git bisect bad 493ac92ff65ec4c4cd4c43870e778760a012951d
>>> # bad: [20ca3ae9c517eee9b2f1bd0fb2a06e2d14153792] Merge remote-tracking
>>> branch 'btrfs-kdave/for-next'
>>> git bisect bad 20ca3ae9c517eee9b2f1bd0fb2a06e2d14153792
>>> # good: [c454e65fb9ade11d0f84718d06a6888e2c92804d] Merge remote-tracking
>>> branch 'omap/for-next'
>>> git bisect good c454e65fb9ade11d0f84718d06a6888e2c92804d
>>> # good: [6f5c70fb9b4fc0534157bfa40cea9b402e6f2506] Merge remote-tracking
>>> branch 'microblaze/next'
>>> git bisect good 6f5c70fb9b4fc0534157bfa40cea9b402e6f2506
>>> # bad: [7f053cd68fd14243c8f202b4086d7dd75c409e6f] MIPS: Loongson-3:
>>> Introduce CONFIG_LOONGSON3_ENHANCEMENT
>>> git bisect bad 7f053cd68fd14243c8f202b4086d7dd75c409e6f
>>> # good: [e9aacdd7f0b66c4ace17e5950c48e7cc61a253c8] MIPS: Allow RIXI to be
>>> used on non-R2 or R6 cores
>>> git bisect good e9aacdd7f0b66c4ace17e5950c48e7cc61a253c8
>>> # good: [d1e8b9a8dc6c7fa9add5dfa7083e035ce037e56d] MAINTAINERS: add
>>> Loongson1 architecture entry
>>> git bisect good d1e8b9a8dc6c7fa9add5dfa7083e035ce037e56d
>>> # good: [13ff6275bb389c3669082d3ef8483592a31eb0ea] MIPS: Fix siginfo.h to
>>> use strict posix types
>>> git bisect good 13ff6275bb389c3669082d3ef8483592a31eb0ea
>>> # good: [66e74bdd51e617023fa2e79a807b704fb3eed8aa] MIPS: Enable ptrace hw
>>> watchpoints on MIPS R6
>>> git bisect good 66e74bdd51e617023fa2e79a807b704fb3eed8aa
>>> # good: [f7cabc2dac8adf5986dbc700584bc3b8fe493d4d] MIPS: Loongson-3:
>>> Adjust irq dispatch to speedup processing
>>> git bisect good f7cabc2dac8adf5986dbc700584bc3b8fe493d4d
>>> # bad: [4978c8477e96fb9e9d870d8f42328dcabf1a65e9] MIPS: Loongson-3: Set
>>> cache flush handlers to cache_noop
>>> git bisect bad 4978c8477e96fb9e9d870d8f42328dcabf1a65e9
>>> # bad: [04a35922c1dac1b4864b8b366a37474e9e51d8c0] MIPS: Loongson: Add
>>> Loongson-3A R2 basic support
>>> git bisect bad 04a35922c1dac1b4864b8b366a37474e9e51d8c0
>>> # first bad commit: [04a35922c1dac1b4864b8b366a37474e9e51d8c0] MIPS:
>>> Loongson: Add Loongson-3A R2 basic support
>>>
>>
>>
>