From: Linus Walleij <linus.walleij@linaro.org>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Hailong Liu <liu.hailong6@zte.com.cn>,
Russell King - ARM Linux <linux@armlinux.org.uk>,
kasan-dev <kasan-dev@googlegroups.com>,
syzkaller <syzkaller@googlegroups.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: Arm + KASAN + syzbot
Date: Tue, 19 Jan 2021 11:28:33 +0100 [thread overview]
Message-ID: <CACRpkdYwT271D5o_jpubH5BXwTsgt8bH=v36rGP9HQn3sfDwMw@mail.gmail.com> (raw)
In-Reply-To: <CACT4Y+ad047xhqsd-omzHbJBRShm-1yLQogSR3+UMJDEtVJ=hw@mail.gmail.com>
On Tue, Jan 19, 2021 at 11:23 AM Dmitry Vyukov <dvyukov@google.com> wrote:
> On Tue, Jan 19, 2021 at 11:17 AM Linus Walleij <linus.walleij@linaro.org> wrote:
> > > > You could also try other QEMU machine (I don't know many of them, some
> > > > time ago I was using exynos defconfig on smdkc210, but without KASAN).
> > >
> > > vexpress-a15 seems to be the most widely used and more maintained. It
> > > works without KASAN. Is there a reason to switch to something else?
> >
> > Vexpress A15 is as good as any.
> >
> > It can however be compiled in two different ways depending on whether
> > you use LPAE or not, and the defconfig does not use LPAE.
> > By setting CONFIG_ARM_LPAE you more or less activate a totally
> > different MMU on the same machine, and those are the two
> > MMUs used by ARM32 systems, so I would test these two.
> >
> > The other interesting Qemu target that is and was used a lot is
> > Versatile, versatile_defconfig. This is an older ARMv5 (ARM926EJ-S)
> > CPU core with less memory, but the MMU should be behaving the same
> > as vanilla Vexpress.
>
> That's interesting. If we have more than 1 instance in future we could
> vary different aspects between them to get more combined coverage.
> E.g. one could use ARM_LPAE=y while another ARM_LPAE=n.
>
> But let's start with 1 instance running first :)
Hm I noticed that I was running in LPAE mode by default on Vexpress
so I try non-LPAE now. Let's see what happens...
Linus
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next prev parent reply other threads:[~2021-01-19 10:30 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 16:31 Arm + KASAN + syzbot Dmitry Vyukov
2021-01-19 8:36 ` Krzysztof Kozlowski
2021-01-19 8:46 ` Linus Walleij
2021-01-19 10:04 ` Dmitry Vyukov
2021-01-19 10:17 ` Linus Walleij
2021-01-19 10:23 ` Dmitry Vyukov
2021-01-19 10:28 ` Linus Walleij [this message]
2021-01-19 10:53 ` Dmitry Vyukov
2021-01-19 11:05 ` Dmitry Vyukov
2021-01-19 11:13 ` Russell King - ARM Linux admin
2021-01-19 11:17 ` Dmitry Vyukov
2021-01-19 11:43 ` Russell King - ARM Linux admin
2021-01-19 12:05 ` Dmitry Vyukov
2021-01-19 12:36 ` Russell King - ARM Linux admin
2021-01-19 18:57 ` Dmitry Vyukov
2021-01-19 19:48 ` Russell King - ARM Linux admin
2021-01-21 13:14 ` Russell King - ARM Linux admin
2021-01-21 13:49 ` Dmitry Vyukov
2021-01-21 14:04 ` Arnd Bergmann
2021-01-21 13:59 ` Dmitry Vyukov
2021-01-21 14:52 ` Linus Walleij
2021-01-26 21:24 ` Dmitry Vyukov
2021-01-27 8:24 ` Linus Walleij
2021-01-27 9:39 ` Dmitry Vyukov
2021-01-27 9:57 ` Linus Walleij
2021-01-27 10:12 ` Dmitry Vyukov
2021-01-27 10:19 ` Russell King - ARM Linux admin
2021-03-11 10:54 ` Dmitry Vyukov
2021-03-11 13:42 ` Russell King - ARM Linux admin
2021-03-11 18:05 ` Dmitry Vyukov
2021-03-11 13:55 ` Linus Walleij
2021-03-11 14:09 ` Russell King - ARM Linux admin
2021-03-11 14:37 ` Linus Walleij
2021-03-11 14:55 ` Arnd Bergmann
2021-03-11 18:08 ` Dmitry Vyukov
2021-03-15 14:01 ` Linus Walleij
2021-03-15 19:03 ` Russell King - ARM Linux admin
2021-01-19 13:22 ` Linus Walleij
2021-01-19 8:41 ` Linus Walleij
2021-01-19 8:43 ` Linus Walleij
2021-01-19 10:18 ` Dmitry Vyukov
2021-01-19 10:27 ` Linus Walleij
2021-01-19 10:36 ` Dmitry Vyukov
2021-01-19 10:03 ` Mark Rutland
2021-01-19 10:34 ` Dmitry Vyukov
2021-01-19 10:55 ` Russell King - ARM Linux admin
2021-01-19 13:00 ` Mark Rutland
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