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

[Huacai Chen]

This is a kernel bug, I'll send a patch.

Huacai

On Wed, Apr 20, 2016 at 12:43 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> On 04/19/2016 08:37 PM, éåæ 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@xxxxxxxxxxxx>;
>> Date:  Wed, Apr 20, 2016 10:54 AM
>> To:  "Huacai Chen"<chenhc@xxxxxxxxxx>;
>> Cc:  "Ralf Baechle"<ralf@xxxxxxxxxxxxxx>;
>> "linux-mips"<linux-mips@xxxxxxxxxxxxxx>;
>> "linux-next"<linux-next@xxxxxxxxxxxxxxx>;
>> "linux-kernel"<linux-kernel@xxxxxxxxxxxxxxx>;
>> 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
>>
>
>