diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2022-09-26 15:43:00 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-28 19:22:11 +1000 |
| commit | 799f7063c7645f9a751d17f5dfd73b952f962cd2 (patch) | |
| tree | 45b446bc2ddbb948a69b2dd92c4e2d46b99595ae | |
| parent | 56adbb7a8b6cc7fc9b940829c38494e53c9e57d1 (diff) | |
powerpc/64: mark irqs hard disabled in boot paca
This prevents interrupts in early boot (e.g., program check) from
enabling MSR[EE], potentially causing endian mismatch or other
crashes when reporting early boot traps.
Fixes: 4423eb5ae32ec ("powerpc/64/interrupt: make normal synchronous interrupts enable MSR[EE] if possible")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220926054305.2671436-3-npiggin@gmail.com
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 6434a3f6acb5..e1ac803c9046 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -182,8 +182,10 @@ static void __init fixup_boot_paca(void) get_paca()->cpu_start = 1; /* Allow percpu accesses to work until we setup percpu data */ get_paca()->data_offset = 0; - /* Mark interrupts disabled in PACA */ + /* Mark interrupts soft and hard disabled in PACA */ irq_soft_mask_set(IRQS_DISABLED); + get_paca()->irq_happened = PACA_IRQ_HARD_DIS; + WARN_ON(mfmsr() & MSR_EE); } static void __init configure_exceptions(void) |