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s390/smp: sort out physical vs virtual CPU0 lowcore pointer

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SPX instruction called from set_prefix() expects physical
address of the lowcore to be installed, but instead the
virtual address is passed.

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: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-03-30 19:50:16 +02:00 committed by Heiko Carstens
parent 28d3417a94
commit 7714e16f79
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kernel/setup.c
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@ -494,7 +494,7 @@ static void __init setup_lowcore_dat_off(void)
lc->return_mcck_lpswe = gen_lpswe(__LC_RETURN_MCCK_PSW);
lc->preempt_count = PREEMPT_DISABLED;
set_prefix((u32)(unsigned long) lc);
set_prefix(__pa(lc));
lowcore_ptr[0] = lc;
}