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s390/smp: use physical address for SIGP_SET_PREFIX command

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Signal processor SIGP_SET_PREFIX command expects physical
address of the lowcore to be installed, but instead the
virtual address is provided.

Note: this does not fix a bug currently, since virtual and
physical addresses are identical.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-03-24 20:02:24 +01:00 committed by Vasily Gorbik
parent 4f45c37ffd
commit 7277b4216a
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kernel/smp.c
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@ -213,7 +213,7 @@ static int pcpu_alloc_lowcore(struct pcpu *pcpu, int cpu)
if (nmi_alloc_mcesa(&lc->mcesad))
goto out;
lowcore_ptr[cpu] = lc;
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, (u32)(unsigned long) lc);
pcpu_sigp_retry(pcpu, SIGP_SET_PREFIX, __pa(lc));
return 0;
out: