Messages in this thread | | | From | Peter Rosin <> | Subject | RE: Domain faults when CONFIG_CPU_SW_DOMAIN_PAN is enabled | Date | Thu, 3 Dec 2015 12:08:11 +0000 |
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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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