This is a note to let you know that I've just added the patch titled
powerpc/64: mark irqs hard disabled in boot paca
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-64-mark-irqs-hard-disabled-in-boot-paca.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e8cce008bd595e971d1286fcd0fff23f68ac4002
Author: Nicholas Piggin <npiggin@xxxxxxxxx>
Date: Mon Sep 26 15:43:00 2022 +1000
powerpc/64: mark irqs hard disabled in boot paca
[ Upstream commit 799f7063c7645f9a751d17f5dfd73b952f962cd2 ]
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@xxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220926054305.2671436-3-npiggin@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 2b2d0b0fbb30..ce8fc6575eaa 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)
