From: ynorov@caviumnetworks.com (Yury Norov)
To: linux-arm-kernel@lists.infradead.org
Subject: arm64: kernel v4.6-rc1 hangs on QEMU
Date: Wed, 30 Mar 2016 01:22:17 +0300 [thread overview]
Message-ID: <20160329222217.GA31869@yury-N73SV> (raw)
In-Reply-To: <3753214.GGjb33ZPlQ@wuerfel>
On Wed, Mar 30, 2016 at 12:12:30AM +0200, Arnd Bergmann wrote:
> On Wednesday 30 March 2016 01:05:02 Yury Norov wrote:
> > Checked for both v4.6-rc1 and current master (1993b17).
> > Config: arm64 defconfig
> > QEMU: QEMU emulator version 2.3.0 (Debian 1:2.3+dfsg-5ubuntu9.2)
> >
> > Stacktrace:
> > #0 arch_counter_get_cntvct () at
> > ./arch/arm64/include/asm/arch_timer.h:121
> > #1 __delay (cycles=1024) at arch/arm64/lib/delay.c:31
> > #2 0xffffff8008340970 in __const_udelay (xloops=<optimized out>) at
> > arch/arm64/lib/delay.c:41
> > #3 0xffffff800815420c in panic (fmt=<optimized out>) at
> > kernel/panic.c:257
> > #4 0xffffff80080be588 in do_exit (code=11) at kernel/exit.c:666
> > #5 0xffffff8008089d08 in die (str=<optimized out>, regs=0xffffff8008aebe20 <init_thread_union+15904>, err=143867376) at arch/arm64/kernel/traps.c:298
> > #6 0xffffff8008089dec in arm64_notify_die (str=<optimized out>, regs=<optimized out>, info=<optimized out>, err=<optimized out>) at arch/arm64/kernel/traps.c:309
> > #7 0xffffff800808212c in do_undefinstr (regs=0xffffff8008aebe20 <init_thread_union+15904>) at arch/arm64/kernel/traps.c:399
> > #8 0xffffff8008a1fe08 in cpuinfo_store_boot_cpu () at arch/arm64/kernel/cpuinfo.c:252
> > #9 0xffffff8008a1fe08 in cpuinfo_store_boot_cpu () at arch/arm64/kernel/cpuinfo.c:252
> > #10 0xffffff8008a20388 in smp_prepare_boot_cpu () at arch/arm64/kernel/smp.c:403
> > #11 0xffffff8008a1d6ec in start_kernel () at init/main.c:511
> > #12 0xffffff80080811d8 in __mmap_switched () at arch/arm64/kernel/head.S:437
> > Backtrace stopped: previous frame identical to this frame (corrupt stack?)
> >
>
> Undefined instruction in cpuinfo_store_boot_cpu() could be related
> to the SYS_ID_AA64MMFR2_EL1 access that was recently added.
>
> What does the architecture say about reading unknown cpuid registers?
>
> Arnd
ThunderX has some unimplemented system registers. AFAIR, attempt to access it
causes data abort.
Yury.
next prev parent reply other threads:[~2016-03-29 22:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-29 22:05 arm64: kernel v4.6-rc1 hangs on QEMU Yury Norov
2016-03-29 22:12 ` Arnd Bergmann
2016-03-29 22:22 ` Yury Norov [this message]
2016-03-29 22:32 ` Arnd Bergmann
2016-03-29 22:52 ` Yury Norov
2016-03-30 6:44 ` Kefeng Wang
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