From: Tony Lindgren <tony@atomide.com>
To: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Cc: Sebastian Reichel <sre@kernel.org>,
linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org,
Pavel Machek <pavel@ucw.cz>
Subject: Re: ARM errata 430973 on multi platform kernels
Date: Fri, 3 Apr 2015 15:15:17 -0700 [thread overview]
Message-ID: <20150403221517.GX10805@atomide.com> (raw)
In-Reply-To: <551F0F50.1030701@gmail.com>
* Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> [150403 15:08]:
> Hi
>
> On 3.04.2015 19:35, Sebastian Reichel wrote:
> >
> >Maybe an option would be to provide two cpu_v7_switch_mm
> >implementations (one with the errata and one without). Then
> >the system can start with the simple implementation. Once
> >the boot as progressed far enough to know, that the hardware
> >is affected by the errata, it could switch to the implementation
> >with the flushing.
>
> Or rather the opposite, as if the kernel itself is thumb-compiled, it most
> probably will have no chance to progress enough to switch to the correct
> implementation before hanging.
We should first verify the same bug happens with armel also.
I just verified the CPU load in the background makes armhf
apps segfault without $subject workaround enabled.
If the segfaulting does not happen with armel, then chances
it's some kind of neon related issue and the fix can be more
targeted.
Regards,
Tony
WARNING: multiple messages have this Message-ID (diff)
From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: ARM errata 430973 on multi platform kernels
Date: Fri, 3 Apr 2015 15:15:17 -0700 [thread overview]
Message-ID: <20150403221517.GX10805@atomide.com> (raw)
In-Reply-To: <551F0F50.1030701@gmail.com>
* Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> [150403 15:08]:
> Hi
>
> On 3.04.2015 19:35, Sebastian Reichel wrote:
> >
> >Maybe an option would be to provide two cpu_v7_switch_mm
> >implementations (one with the errata and one without). Then
> >the system can start with the simple implementation. Once
> >the boot as progressed far enough to know, that the hardware
> >is affected by the errata, it could switch to the implementation
> >with the flushing.
>
> Or rather the opposite, as if the kernel itself is thumb-compiled, it most
> probably will have no chance to progress enough to switch to the correct
> implementation before hanging.
We should first verify the same bug happens with armel also.
I just verified the CPU load in the background makes armhf
apps segfault without $subject workaround enabled.
If the segfaulting does not happen with armel, then chances
it's some kind of neon related issue and the fix can be more
targeted.
Regards,
Tony
next prev parent reply other threads:[~2015-04-03 22:19 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-01 19:07 [PATCH RESEND] ARM: dts: OMAP3-N900: Add microphone bias voltages Jarkko Nikula
2015-03-30 16:30 ` Jarkko Nikula
[not found] ` <55197A12.1050009-FVTvWyuFUl3QT0dZR+AlfA@public.gmane.org>
2015-03-30 16:42 ` Tony Lindgren
2015-03-30 17:45 ` Jarkko Nikula
[not found] ` <55198BA4.5010207-FVTvWyuFUl3QT0dZR+AlfA@public.gmane.org>
2015-03-30 17:50 ` Tony Lindgren
2015-03-31 12:32 ` Sebastian Reichel
2015-04-01 19:47 ` Tony Lindgren
2015-04-03 16:35 ` ARM errata 430973 on multi platform kernels (was: OMAP3-N900: Add microphone bias voltages) Sebastian Reichel
2015-04-03 18:39 ` Tony Lindgren
2015-04-03 18:39 ` Tony Lindgren
2015-04-03 19:21 ` Robert Nelson
2015-04-03 19:21 ` Robert Nelson
2015-04-05 13:00 ` Sebastian Reichel
2015-04-05 13:00 ` Sebastian Reichel
2015-04-05 13:26 ` Pali Rohár
2015-04-05 13:26 ` Pali Rohár
2015-04-05 13:45 ` Sebastian Reichel
2015-04-05 13:45 ` Sebastian Reichel
2015-04-05 13:52 ` Pali Rohár
2015-04-05 13:52 ` Pali Rohár
2015-04-06 17:38 ` Sebastian Reichel
2015-04-06 17:38 ` Sebastian Reichel
2015-04-03 20:42 ` Pavel Machek
2015-04-03 20:42 ` Pavel Machek
2015-04-03 22:08 ` ARM errata 430973 on multi platform kernels Ivaylo Dimitrov
2015-04-03 22:08 ` Ivaylo Dimitrov
2015-04-03 22:15 ` Tony Lindgren [this message]
2015-04-03 22:15 ` Tony Lindgren
2015-04-03 22:47 ` Ivaylo Dimitrov
2015-04-03 22:47 ` Ivaylo Dimitrov
2015-04-03 22:52 ` Tony Lindgren
2015-04-03 22:52 ` Tony Lindgren
2015-04-05 4:13 ` Matthijs van Duin
2015-04-05 4:13 ` Matthijs van Duin
2015-04-05 7:23 ` Ivaylo Dimitrov
2015-04-05 7:23 ` Ivaylo Dimitrov
2015-04-05 16:50 ` Matthijs van Duin
2015-04-05 16:50 ` Matthijs van Duin
2015-04-05 16:52 ` Matthijs van Duin
2015-04-05 16:52 ` Matthijs van Duin
2015-04-05 21:08 ` Ivaylo Dimitrov
2015-04-05 21:08 ` Ivaylo Dimitrov
2015-04-05 23:52 ` Matthijs van Duin
2015-04-05 23:52 ` Matthijs van Duin
2015-04-06 15:19 ` Tony Lindgren
2015-04-06 15:19 ` Tony Lindgren
2015-04-06 15:40 ` Tony Lindgren
2015-04-06 15:40 ` Tony Lindgren
2015-04-06 17:14 ` Ivaylo Dimitrov
2015-04-06 17:14 ` Ivaylo Dimitrov
2015-04-06 17:42 ` Tony Lindgren
2015-04-06 17:42 ` Tony Lindgren
2015-04-06 18:14 ` Matthijs van Duin
2015-04-06 18:14 ` Matthijs van Duin
2015-04-07 2:23 ` Tony Lindgren
2015-04-07 2:23 ` Tony Lindgren
2015-04-07 3:12 ` Sebastian Reichel
2015-04-07 3:12 ` Sebastian Reichel
2015-04-07 3:49 ` Matthijs van Duin
2015-04-07 3:49 ` Matthijs van Duin
2015-04-07 14:48 ` Tony Lindgren
2015-04-07 14:48 ` Tony Lindgren
2015-04-09 22:37 ` Grazvydas Ignotas
2015-04-09 22:37 ` Grazvydas Ignotas
2015-04-09 22:44 ` Tony Lindgren
2015-04-09 22:44 ` Tony Lindgren
2015-04-09 23:44 ` Nishanth Menon
2015-04-09 23:44 ` Nishanth Menon
2015-04-10 22:05 ` Grazvydas Ignotas
2015-04-10 22:05 ` Grazvydas Ignotas
2015-04-10 23:08 ` Tony Lindgren
2015-04-10 23:08 ` Tony Lindgren
2015-04-16 16:53 ` Matthijs van Duin
2015-04-16 16:53 ` Matthijs van Duin
2015-04-07 13:58 ` Russell King - ARM Linux
2015-04-07 13:58 ` Russell King - ARM Linux
2015-04-07 13:57 ` Russell King - ARM Linux
2015-04-07 13:57 ` Russell King - ARM Linux
2015-04-07 15:22 ` Tony Lindgren
2015-04-07 15:22 ` Tony Lindgren
2015-04-07 15:44 ` Tony Lindgren
2015-04-07 15:44 ` Tony Lindgren
2015-04-08 23:08 ` Russell King - ARM Linux
2015-04-08 23:08 ` Russell King - ARM Linux
2015-04-08 23:15 ` Tony Lindgren
2015-04-08 23:15 ` Tony Lindgren
2015-04-08 23:06 ` Russell King - ARM Linux
2015-04-08 23:06 ` Russell King - ARM Linux
2015-04-09 13:48 ` Russell King - ARM Linux
2015-04-09 13:48 ` Russell King - ARM Linux
2015-04-09 15:09 ` Tony Lindgren
2015-04-09 15:09 ` Tony Lindgren
2015-04-09 15:30 ` Russell King - ARM Linux
2015-04-09 15:30 ` Russell King - ARM Linux
2015-04-15 16:31 ` Sebastian Reichel
2015-04-15 16:31 ` Sebastian Reichel
2015-04-16 16:08 ` Tony Lindgren
2015-04-16 16:08 ` Tony Lindgren
2015-04-17 18:41 ` Sebastian Reichel
2015-04-17 18:41 ` Sebastian Reichel
2015-04-20 23:40 ` Tony Lindgren
2015-04-20 23:40 ` Tony Lindgren
2015-04-23 10:25 ` Russell King - ARM Linux
2015-04-23 10:25 ` Russell King - ARM Linux
2015-04-23 14:17 ` Tony Lindgren
2015-04-23 14:17 ` Tony Lindgren
2015-04-28 18:13 ` Russell King - ARM Linux
2015-04-28 18:13 ` Russell King - ARM Linux
2015-04-29 14:40 ` Tony Lindgren
2015-04-29 14:40 ` Tony Lindgren
2015-05-04 14:24 ` Tony Lindgren
2015-05-04 14:24 ` Tony Lindgren
2015-04-24 8:54 ` Matthijs van Duin
2015-04-24 8:54 ` Matthijs van Duin
2015-04-28 18:11 ` Russell King - ARM Linux
2015-04-28 18:11 ` Russell King - ARM Linux
2015-05-02 6:51 ` Matthijs van Duin
2015-05-02 6:51 ` Matthijs van Duin
2015-04-05 13:39 ` Sebastian Reichel
2015-04-05 13:39 ` Sebastian Reichel
2015-04-06 15:24 ` Tony Lindgren
2015-04-06 15:24 ` Tony Lindgren
2015-05-04 16:07 ` [PATCH RESEND] ARM: dts: OMAP3-N900: Add microphone bias voltages Tony Lindgren
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