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(parent: b4d70a6) | patch
s390/smp: perform initial CPU reset also for SMT siblings
authorSven Schnelle <svens@linux.ibm.com>
Tue, 8 Dec 2020 06:35:21 +0000 (07:35 +0100)
committerHeiko Carstens <hca@linux.ibm.com>
Wed, 9 Dec 2020 20:02:08 +0000 (21:02 +0100)
commitb5e438ebd7e808d1d2435159ac4742e01a94b8da
treea72b50aac0baa5d2fa8bf10309915658371fb369tree | snapshot
parentb4d70a6134d2152d692ccc873ff6fa3351631927commit | diff
s390/smp: perform initial CPU reset also for SMT siblings

Not resetting the SMT siblings might leave them in unpredictable
state. One of the observed problems was that the CPU timer wasn't
reset and therefore large system time values where accounted during
CPU bringup.

Cc: <stable@kernel.org> # 4.0
Fixes: 10ad34bc76dfb ("s390: add SMT support")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
arch/s390/kernel/smp.c diff | blob | history
Domain: System / Kernel;