RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled

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From	Peter Rosin <peda@axentia.se>
Newsgroups	linux.kernel
Subject	RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled
Date	Thu, 03 Dec 2015 13:10:02 +0100
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Russell King wrote:
> On Thu, Dec 03, 2015 at 11:38:20AM +0000, Peter Rosin wrote:
> > Russell King wrote:
> > > On Thu, Dec 03, 2015 at 08:33:13AM +0000, Peter Rosin wrote:
> > > > I wrote:
> > > > > If I enable CONFIG_CPU_SW_DOMAIN_PAN, I sometimes (but not always) get the
> > > > > following (or very similar) on boot.
> > > > 
> > > > I should have said "if I don't disable", as the option is "default y".
> > > > 
> > > > Also, if it survives on boot, below is an example of later trouble (after
> > > > 30+ minutes on this occasion).
> > > 
> > > Please apply this patch so we (might) get a slightly better oops dump,
> > > and then try to reproduce.
> > 
> > Sure thing, but it's still "DAC: 00000051"...
> 
> Thanks, that confirms that something in the uaccess-with-memcpy code
> is clearing the DACR back to 0x51.
> 
> This has come up several times before, and I really can't spot the
> problem in this code, so I've always said to disable the
> uaccess-with-memcpy code.  Personally, I'd like to see the back
> of that code...

Ok, but it's not me doing crazy things if that's what you are implying
(not saying that you are), because the sama5_defconfig has

	CONFIG_UACCESS_WITH_MEMCPY=y

So, something needs to happen or sama5 remains default-broken.

Cheers,
Peter

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Thread

RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Peter Rosin <peda@axentia.se> - 2015-12-03 09:40 +0100
  Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-03 12:10 +0100
    RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Peter Rosin <peda@axentia.se> - 2015-12-03 12:50 +0100
      Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-03 13:00 +0100
        RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Peter Rosin <peda@axentia.se> - 2015-12-03 13:10 +0100
          Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-03 14:40 +0100
            RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Peter Rosin <peda@axentia.se> - 2015-12-03 17:20 +0100
              Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-03 17:50 +0100
                Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-03 18:30 +0100
                Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Nicolas Pitre <nico@fluxnic.net> - 2015-12-03 19:30 +0100
                Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-05 14:50 +0100
                RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Peter Rosin <peda@axentia.se> - 2015-12-03 22:40 +0100
                Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-10 01:30 +0100
                RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Peter Rosin <peda@axentia.se> - 2015-12-10 16:40 +0100
                Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-12-10 17:30 +0100
                RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled Peter Rosin <peda@axentia.se> - 2015-12-10 19:40 +0100

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