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Brandon Bergren 9367fb301c [PowerPC] Fix panic when attempting to handle an HMI from an idle thread

In IRC, sfs_ finally managed to get a good trace of a kernel panic that was
happening when attempting to use webengine.

As it turns out, we were using vtophys() from interrupt context on an idle
thread in opal_hmi_handler2().

Since this involves locking the kernel pmap on PPC64 at the moment, this
ended up tripping a KASSERT in mtx_lock(), which then caused a parallel
panic stampede.

So, avoid this by preallocating the flags variable and storing it in PCPU.

Fixes "panic: mtx_lock() by idle thread 0x... on sleep mutex kernelpmap".

Differential Revision:	https://reviews.freebsd.org/D22962

2019-12-30 02:56:47 +00:00

opal_async.c

Extract eventfilter declarations to sys/_eventfilter.h

2019-05-20 00:38:23 +00:00

opal_console.c

Extract eventfilter declarations to sys/_eventfilter.h

2019-05-20 00:38:23 +00:00

opal_dbg.c

[PPC64] Enable opal console use as a GDB DBGPORT

2019-12-09 13:09:32 +00:00

opal_dev.c

Extract eventfilter declarations to sys/_eventfilter.h