[PATCH v3 5/9] powerpc/64s/interrupt: preserve regs->softe for NMI interrupts
flat view
STALE1929d
LANDED
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2021-06-30 07:49:01
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Landed in mainline as 1b0482229c30 on 2021-06-30.
If an NMI interrupt hits in an implicit soft-masked region, regs->softe
is modified to reflect that. This may not be necessary for correctness
at the moment, but it is less surprising and it's unhelpful when
debugging or adding checks.
Make sure this is changed back to how it was found before returning.
Fixes: 4ec5feec1ad0 ("powerpc/64s: Make NMI record implicitly soft-masked code as irqs disabled")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index d7df247a149c..789311d1e283 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h@@ -227,6 +227,7 @@ struct interrupt_nmi_state { u8 irq_soft_mask; u8 irq_happened; u8 ftrace_enabled; + u64 softe; #endif };
@@ -252,6 +253,7 @@ static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct inte #ifdef CONFIG_PPC64 state->irq_soft_mask = local_paca->irq_soft_mask; state->irq_happened = local_paca->irq_happened; + state->softe = regs->softe; /* * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
@@ -311,6 +313,7 @@ static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct inter /* Check we didn't change the pending interrupt mask. */ WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened); + regs->softe = state->softe; local_paca->irq_happened = state->irq_happened; local_paca->irq_soft_mask = state->irq_soft_mask; #endif
--
2.23.0