Messages in this thread | | | Date | Thu, 3 Dec 2015 11:51:43 +0000 | From | Russell King - ARM Linux <> | Subject | Re: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled |
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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...
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