From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: arm64: unhandled level 0 translation fault
Date: Tue, 12 Dec 2017 10:36:35 +0000 [thread overview]
Message-ID: <20171212103635.GD28301@arm.com> (raw)
In-Reply-To: <CAMuHMdXh_6FaV-SFGWxcBb1-NNGYngDrYnnWA=9Y6xmRAkcxqg@mail.gmail.com>
Hi Geert,
On Tue, Dec 12, 2017 at 11:20:09AM +0100, Geert Uytterhoeven wrote:
> During userspace (Debian jessie NFS root) boot on arm64:
>
> rpcbind[1083]: unhandled level 0 translation fault (11) at 0x00000008,
> esr 0x92000004, in dash[aaaaadf77000+1a000]
> CPU: 0 PID: 1083 Comm: rpcbind Not tainted
> 4.15.0-rc3-arm64-renesas-02176-g14f9a1826e48e355 #51
> Hardware name: Renesas Salvator-X 2nd version board based on r8a7795 ES2.0+ (DT)
> pstate: 80000000 (Nzcv daif -PAN -UAO)
> pc : 0xaaaaadf8a51c
> lr : 0xaaaaadf8ac08
> sp : 0000ffffcffeac00
> x29: 0000ffffcffeac00 x28: 0000aaaaadfa1000
> x27: 0000ffffcffebf7c x26: 0000ffffcffead20
> x25: 0000aaaacea1c5f0 x24: 0000000000000000
> x23: 0000aaaaadfa1000 x22: 0000aaaaadfa1000
> x21: 0000000000000000 x20: 0000000000000008
> x19: 0000000000000000 x18: 0000ffffcffeb500
> x17: 0000ffffa22babfc x16: 0000aaaaadfa1ae8
> x15: 0000ffffa2363588 x14: ffffffffffffffff
> x13: 0000000000000020 x12: 0000000000000010
> x11: 0101010101010101 x10: 0000aaaaadfa1000
> x9 : 00000000ffffff81 x8 : 0000aaaaadfa2000
> x7 : 0000000000000000 x6 : 0000000000000000
> x5 : 0000aaaaadfa2338 x4 : 0000aaaaadfa2000
> x3 : 0000aaaaadfa2338 x2 : 0000000000000000
> x1 : 0000aaaaadfa28b0 x0 : 0000aaaaadfa4c30
>
> Sometimes it happens with other processes, but the main address, esr, and
> pstate values are always the same.
>
> I regularly run arm64/for-next/core (through bi-weekly renesas-drivers
> releases, so the last time was two weeks ago), but never saw the issue
> before until today, so probably v4.15-rc1 is OK.
> Unfortunately it doesn't happen during every boot, which makes it
> cumbersome to bisect.
>
> My first guess was UNMAP_KERNEL_AT_EL0, but even after disabling that,
> and even without today's arm64/for-next/core merged in, I still managed to
> reproduce the issue, so I believe it was introduced in v4.15-rc2 or
> v4.15-rc3.
Urgh, this looks nasty. Thanks for the report! A few questions:
- Can you share your .config somewhere please?
- What was your last known-good kernel?
- Have you seen it on any other Soc?
- What's the CPU in your SoC?
If I can reproduce the failure here, then I should be able to debug ASAP.
Cheers,
Will
next prev parent reply other threads:[~2017-12-12 10:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-12 10:20 arm64: unhandled level 0 translation fault Geert Uytterhoeven
2017-12-12 10:36 ` Will Deacon [this message]
2017-12-12 15:11 ` Geert Uytterhoeven
2017-12-12 16:00 ` Geert Uytterhoeven
2017-12-12 16:57 ` Will Deacon
2017-12-12 20:54 ` Geert Uytterhoeven
2017-12-13 10:24 ` Will Deacon
2017-12-14 14:34 ` Geert Uytterhoeven
2017-12-14 15:16 ` Will Deacon
2017-12-14 15:24 ` Dave P Martin
2017-12-14 18:08 ` Geert Uytterhoeven
2017-12-15 11:23 ` Dave Martin
2017-12-15 13:30 ` Geert Uytterhoeven
2017-12-15 14:27 ` Will Deacon
2017-12-15 15:56 ` Geert Uytterhoeven
2017-12-15 15:59 ` Geert Uytterhoeven
2017-12-15 16:06 ` Will Deacon
2017-12-15 17:11 ` Dave Martin
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