6.12-stable review patch. If anyone has any objections, please let me know.
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From: Heiko Carstens hca@linux.ibm.com
[ Upstream commit 7cf636c99b257c1b4b12066ab34fd5f06e8d892f ]
In case of an early crash the early program check handler also prints the last breaking event address which is contained within the pt_regs structure. However it is not initialized, and therefore a more or less random value is printed in case of a crash.
Copy the last breaking event address from lowcore to pt_regs in case of an early program check to address this. This also makes it easier to analyze early crashes.
Reviewed-by: Alexander Gordeev agordeev@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Alexander Gordeev agordeev@linux.ibm.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/s390/kernel/early.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 62f8f5a750a3..0c054e2d1e03 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -183,6 +183,7 @@ void __init __do_early_pgm_check(struct pt_regs *regs)
regs->int_code = lc->pgm_int_code; regs->int_parm_long = lc->trans_exc_code; + regs->last_break = lc->pgm_last_break; ip = __rewind_psw(regs->psw, regs->int_code >> 16);
/* Monitor Event? Might be a warning */