From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: Run armv7 32 bit userspace on aarch64
Date: Mon, 12 Oct 2015 18:50:26 +0100 [thread overview]
Message-ID: <20151012175026.GL16124@arm.com> (raw)
In-Reply-To: <561BF011.80205@linaro.org>
On Mon, Oct 12, 2015 at 10:38:25AM -0700, Shi, Yang wrote:
> BTW, it may be related to unaligned address.
>
> init[1]: unhandled level 3 translation fault (11) at 0x43acfad3, esr
> 0x92000047
> pgd = ffff80007b8be000
> [43acfad3] *pgd=00000000fb8c5003, *pud=00000000fb8c1003,
> *pmd=00000000fb8c2003, *pte=0000000000000000
>
> The userspace is trying to write to 0x43acfad3, the permission is
> readonly.
What's the instruction making the access? If it's a store-multiple, then
we don't support that in the arm64 kernel. It would be nice if the 32-bit
kernel had the same behaviour, but the patch seems to have stalled and
probably doesn't apply anymore:
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7944/1
Will
next prev parent reply other threads:[~2015-10-12 17:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-07 22:46 Run armv7 32 bit userspace on aarch64 Shi, Yang
2015-10-08 11:12 ` Will Deacon
2015-10-09 22:32 ` Shi, Yang
2015-10-10 0:28 ` Shi, Yang
2015-10-10 21:25 ` Arnd Bergmann
2015-10-12 17:26 ` Shi, Yang
2015-10-12 17:38 ` Shi, Yang
2015-10-12 17:50 ` Will Deacon [this message]
2015-10-12 18:41 ` Shi, Yang
2015-10-13 14:18 ` Will Deacon
2015-10-13 16:45 ` Shi, Yang
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