ChanServ changed the topic of #armlinux to: ARM kernel talk [Upstream kernel, find your vendor forums for questions about their kernels] | https://libera.irclog.whitequark.org/armlinux
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<hanetzer>
(init is returning -6 (ENXIO/no such device or address) but there's clearly a sp804 timer there, both by the datasheet, the bsp, and examining regs 0x0ff0-0xffc in u-boot for the primecell periphid
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<tmlind>
ard, arnd: looks like one more vmap stack related issue has popped up, see lkml thread "kernel panic with v5.18-rc1 on OpenPandora (only)", added you both to cc
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<tmlind>
ardb: sorry mistyped your nick
<ardb>
tmlind: so i guess the real question is why we are timing out in this case
<ardb>
it doesn't look like vmap'ed stacks would affect the result of that reg read afaict
<arnd>
tmlind: is that the machine with 4GB of RAM? I don't have a theory yet what is going on, but IIRC it is very rare for machines to have more than 2GB, which would explain why this one ran into something nobody else sees
<tmlind>
arnd: no it's an old handheld gaming device with probably 128 or 256mb of ram :)
<arnd>
ok
<tmlind>
arnd: no idea why the l3 interrupt would be triggering now, it means that something is not getting clocked likely
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<arnd>
ah, I was thinking of the Pyra, which is made by the same folks but otherwise completely different
<ardb>
tmlind: are those clocks managed using smc calls, by any chance?
<tmlind>
ardb: no this is a general purpose soc
<tmlind>
maybe the bisect result is wrong
<arnd>
could it be an actual stack overrun that was never caught before?
<arnd>
He said "removing the wl1251.ko does NOT stop it", but surely that must produce a different backtrace. Maybe worth looking at the call chain without the driver
<tmlind>
i'll suggest disabling l3 temporarily, that might produce a more accurate stack trace of when exactly it happens
<arnd>
wl1251_set_partition() passes a stack variable into a device, which is mapped in mmc_io_rw_extended() using sg_set_buf()
<arnd>
so I think that is a driver bug
<arnd>
maybe the same machine runs into another driver bug with the same symptom if wl1251 is disabled?
<arnd>
dynamically allocating partition[] should help avoid this particular bug I think
<tmlind>
ok
<ardb>
CONFIG_DEBUG_SG=y should catch that as well
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<ajb-linaro>
anyone know where the ARM XML has moved to on the ARM website?
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<hanetzer>
is there a mechanism one can use to check for the existence of the arch timer, global timer, or local? I'm getting some mixed messaging from the bsp and doing what I *think* should work doesn't :)
<hanetzer>
(as far as declaring them in the dts)
<marex>
hanetzer: have you tried looking at the DT ?
<hanetzer>
what's really confusing is I'm not even seeing references to arm,*-twd-wdt anywhere but the dts/documentation, its not in the linux code (at least by that string) as far as I can see?
<j`ey>
hanetzer: does it have two compatibles?
<hanetzer>
marex: as mentioned, conflicting info. bsp mach file has a mmio address for it but popping a node into the dts with that address borks.
<hanetzer>
j`ey: ahhh yeah, maybe, lemme check.
<j`ey>
hanetzer: the drivers usually only have one of them
<j`ey>
unless there's a specific need to match on something more specific
<hanetzer>
because, for a decent amount of arm peripherals, you can use devmem/u-boot's md command to read identification registers in mmio
<hanetzer>
j`ey: three compats, all end in *-twd-wdt, git grepping for "twd-wdt" only returns dts files
<marex>
A runtime PM walks into a bar and says, devmem
<hanetzer>
a roman walks into a bar, holds up two fingers, says I'll have five beers
<Xogium>
marex: what about the hard drive head that parked itself where there was a 'NO PARKING' sign ?
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<hanetzer>
any idea why I'd get 'OF: amba: of_address_to_resource() failed (-22) for /soc/timer@20000000' for a sp804 timer?
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