Toggle IBS op and fetch through /dev/cpuctl0 with hwpmc loaded and
check that every NMI hwpmc declined was claimed. Without the fix both
cases fail on an EPYC 9654.
Reviewed by: kib
MFC after: 2 weeks
Sponsored by: AMD
Signed-off-by: Osvaldo Janeri Filho <[email protected]>
Differential Revision: https://reviews.freebsd.org/D60766