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s390/ipl: fix IPIB virtual vs physical address confusion

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The pointer to IPL Parameter Information Block is stored
in the absolute lowcore for later use by dump tools. That
pointer is a virtual address, though it should be physical
instead.

Note, this does not fix a real issue, since virtual and
physical addresses are currently the same.

Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2023-05-07 18:09:02 +02:00
parent a33239be2d
commit 2facd5d398
1 changed files with 1 additions and 2 deletions
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3
arch/s390/kernel/ipl.c
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@ -1935,14 +1935,13 @@ static struct shutdown_action __refdata dump_action = {
static void dump_reipl_run(struct shutdown_trigger *trigger)
{
unsigned long ipib = (unsigned long) reipl_block_actual;
struct lowcore *abs_lc;
unsigned int csum;
csum = (__force unsigned int)
csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
abs_lc = get_abs_lowcore();
abs_lc->ipib = ipib;
abs_lc->ipib = __pa(reipl_block_actual);
abs_lc->ipib_checksum = csum;
put_abs_lowcore(abs_lc);
dump_run(trigger);