K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2018-08-18T20:35:19.544279Z
K 7
svn:log
V 650
Rudimentary AER reading code for ddb(4).

This is very primitive code to inspect the PCI error state and AER
error state, dump the log and clear errors, from ddb.
pci_print_faulted_dev() is made external to allow calling it from
other places.  It was called from NMI handler but this chunk is not
included.

Also there is a tunable-controlled code to clear AER on device attach,
disabled by default.

All this code was useful to me when I debugged ACPI_DMAR failures (not
faults) long time ago.

Reviewed by:	cem, imp (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D7813

END