From c39fb71a54f09977eba7584ef0eebb25047097c6 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Mon, 26 Sep 2022 15:43:03 +1000 Subject: powerpc/64s/interrupt: masked handler debug check for previous hard disable Prior changes eliminated cases of masked PACA_IRQ_MUST_HARD_MASK interrupts that re-fire due to MSR[EE] being enabled while they are pending. Add a debug check in the masked interrupt handler to catch if this occurs. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220926054305.2671436-6-npiggin@gmail.com --- arch/powerpc/kernel/exceptions-64s.S | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/powerpc/kernel/exceptions-64s.S') diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index a3b51441b039..43e538502f52 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -2794,6 +2794,16 @@ masked_Hinterrupt: masked_interrupt: .endif stw r9,PACA_EXGEN+EX_CCR(r13) +#ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG + /* + * Ensure there was no previous MUST_HARD_MASK interrupt or + * HARD_DIS setting. + */ + lbz r9,PACAIRQHAPPENED(r13) + andi. r9,r9,(PACA_IRQ_MUST_HARD_MASK|PACA_IRQ_HARD_DIS) +0: tdnei r9,0 + EMIT_BUG_ENTRY 0b,__FILE__,__LINE__,0 +#endif lbz r9,PACAIRQHAPPENED(r13) or r9,r9,r10 stb r9,PACAIRQHAPPENED(r13) -- cgit