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s390/nmi: purge tlbs after control register validation

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Play safe and purge all tlbs after the control registers that contain
the primary, secondary and home space asces have been validated.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2017-02-21 11:07:39 +01:00 committed by Martin Schwidefsky
parent 70e28aa0bb
commit 5791d90d00
1 changed files with 2 additions and 1 deletions
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3
arch/s390/kernel/nmi.c
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@ -125,7 +125,8 @@ static int notrace s390_validate_registers(union mci mci, int umode)
s390_handle_damage();
} else {
asm volatile(
" lctlg 0,15,0(%0)"
" lctlg 0,15,0(%0)\n"
" ptlb\n"
: : "a" (&S390_lowcore.cregs_save_area) : "memory");
}
if (!mci.fp) {