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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-07-31 16:26:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-17 16:26:34 +0300 |
| commit | ceab6c2f6528d161b7984e2f5767884d6c12425c (patch) | |
| tree | a4a0c571c720275cad7115a015087dac0895c133 /arch | |
| parent | 4a962dd57f7f31145328573c7baf86a86e4dbf7d (diff) | |
| download | linux-ceab6c2f6528d161b7984e2f5767884d6c12425c.tar.xz | |
s390/traps: Handle early warnings gracefully
[ Upstream commit 3c4d0ae0671827f4b536cc2d26f8b9c54584ccc5 ]
Add missing warning handling to the early program check handler. This
way a warning is printed to the console as soon as the early console
is setup, and the kernel continues to boot.
Before this change a disabled wait psw was loaded instead and the
machine was silently stopped without giving an idea about what
happened.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/early.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index ee051ad81c71..0242fa78c918 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -177,8 +177,21 @@ static __init void setup_topology(void) void __do_early_pgm_check(struct pt_regs *regs) { - if (!fixup_exception(regs)) - disabled_wait(); + struct lowcore *lc = get_lowcore(); + unsigned long ip; + + regs->int_code = lc->pgm_int_code; + regs->int_parm_long = lc->trans_exc_code; + ip = __rewind_psw(regs->psw, regs->int_code >> 16); + + /* Monitor Event? Might be a warning */ + if ((regs->int_code & PGM_INT_CODE_MASK) == 0x40) { + if (report_bug(ip, regs) == BUG_TRAP_TYPE_WARN) + return; + } + if (fixup_exception(regs)) + return; + disabled_wait(); } static noinline __init void setup_lowcore_early(void) |