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

[Guenter Roeck]

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@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