From: Mark Rutland <mark.rutland@arm.com> To: linux-kernel@vger.kernel.org Cc: aou@eecs.berkeley.edu, catalin.marinas@arm.com, deanbo422@gmail.com, green.hu@gmail.com, guoren@kernel.org, jonas@southpole.se, kernelfans@gmail.com, linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk, mark.rutland@arm.com, maz@kernel.org, nickhu@andestech.com, palmer@dabbelt.com, paulmck@kernel.org, paul.walmsley@sifive.com, peterz@infradead.org, shorne@gmail.com, stefan.kristiansson@saunalahti.fi, tglx@linutronix.de, torvalds@linux-foundation.org, tsbogend@alpha.franken.de, vgupta@kernel.org, will@kernel.org Subject: [PATCH 01/15] irq: mips: avoid nested irq_enter() Date: Thu, 21 Oct 2021 19:02:22 +0100 [thread overview] Message-ID: <20211021180236.37428-2-mark.rutland@arm.com> (raw) In-Reply-To: <20211021180236.37428-1-mark.rutland@arm.com> As bcm6345_l1_irq_handle() is a chained irqchip handler, it will be invoked within the context of the root irqchip handler, which must have entered IRQ context already. When bcm6345_l1_irq_handle() calls arch/mips's do_IRQ() , this will nest another call to irq_enter(), and the resulting nested increment to `rcu_data.dynticks_nmi_nesting` will cause rcu_is_cpu_rrupt_from_idle() to fail to identify wakeups from idle, resulting in failure to preempt, and RCU stalls. Chained irqchip handlers must invoke IRQ handlers by way of thee core irqchip code, i.e. generic_handle_irq() or generic_handle_domain_irq() and should not call do_IRQ(), which is intended only for root irqchip handlers. Fix bcm6345_l1_irq_handle() by calling generic_handle_irq() directly. Fixes: c7c42ec2baa1de7a ("irqchips/bmips: Add bcm6345-l1 interrupt controller") Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> --- drivers/irqchip/irq-bcm6345-l1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-bcm6345-l1.c b/drivers/irqchip/irq-bcm6345-l1.c index e3483789f4df..1bd0621c4ce2 100644 --- a/drivers/irqchip/irq-bcm6345-l1.c +++ b/drivers/irqchip/irq-bcm6345-l1.c @@ -140,7 +140,7 @@ static void bcm6345_l1_irq_handle(struct irq_desc *desc) for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) { irq = irq_linear_revmap(intc->domain, base + hwirq); if (irq) - do_IRQ(irq); + generic_handle_irq(irq); else spurious_interrupt(); } -- 2.11.0
WARNING: multiple messages have this Message-ID (diff)
From: Mark Rutland <mark.rutland@arm.com> To: linux-kernel@vger.kernel.org Cc: aou@eecs.berkeley.edu, catalin.marinas@arm.com, deanbo422@gmail.com, green.hu@gmail.com, guoren@kernel.org, jonas@southpole.se, kernelfans@gmail.com, linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk, mark.rutland@arm.com, maz@kernel.org, nickhu@andestech.com, palmer@dabbelt.com, paulmck@kernel.org, paul.walmsley@sifive.com, peterz@infradead.org, shorne@gmail.com, stefan.kristiansson@saunalahti.fi, tglx@linutronix.de, torvalds@linux-foundation.org, tsbogend@alpha.franken.de, vgupta@kernel.org, will@kernel.org Subject: [PATCH 01/15] irq: mips: avoid nested irq_enter() Date: Thu, 21 Oct 2021 19:02:22 +0100 [thread overview] Message-ID: <20211021180236.37428-2-mark.rutland@arm.com> (raw) In-Reply-To: <20211021180236.37428-1-mark.rutland@arm.com> As bcm6345_l1_irq_handle() is a chained irqchip handler, it will be invoked within the context of the root irqchip handler, which must have entered IRQ context already. When bcm6345_l1_irq_handle() calls arch/mips's do_IRQ() , this will nest another call to irq_enter(), and the resulting nested increment to `rcu_data.dynticks_nmi_nesting` will cause rcu_is_cpu_rrupt_from_idle() to fail to identify wakeups from idle, resulting in failure to preempt, and RCU stalls. Chained irqchip handlers must invoke IRQ handlers by way of thee core irqchip code, i.e. generic_handle_irq() or generic_handle_domain_irq() and should not call do_IRQ(), which is intended only for root irqchip handlers. Fix bcm6345_l1_irq_handle() by calling generic_handle_irq() directly. Fixes: c7c42ec2baa1de7a ("irqchips/bmips: Add bcm6345-l1 interrupt controller") Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> --- drivers/irqchip/irq-bcm6345-l1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-bcm6345-l1.c b/drivers/irqchip/irq-bcm6345-l1.c index e3483789f4df..1bd0621c4ce2 100644 --- a/drivers/irqchip/irq-bcm6345-l1.c +++ b/drivers/irqchip/irq-bcm6345-l1.c @@ -140,7 +140,7 @@ static void bcm6345_l1_irq_handle(struct irq_desc *desc) for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) { irq = irq_linear_revmap(intc->domain, base + hwirq); if (irq) - do_IRQ(irq); + generic_handle_irq(irq); else spurious_interrupt(); } -- 2.11.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-10-21 18:02 UTC|newest] Thread overview: 108+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-21 18:02 [PATCH 00/15] irq: remove handle_domain_{irq,nmi}() Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-21 18:02 ` Mark Rutland [this message] 2021-10-21 18:02 ` [PATCH 01/15] irq: mips: avoid nested irq_enter() Mark Rutland 2021-10-22 10:38 ` Marc Zyngier 2021-10-22 10:38 ` Marc Zyngier 2021-10-22 15:05 ` Mark Rutland 2021-10-22 15:05 ` Mark Rutland 2021-10-24 15:31 ` Thomas Bogendoerfer 2021-10-24 15:31 ` Thomas Bogendoerfer 2021-10-21 18:02 ` [PATCH 02/15] irq: mips: stop (ab)using handle_domain_irq() Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-24 15:30 ` Thomas Bogendoerfer 2021-10-24 15:30 ` Thomas Bogendoerfer 2021-10-21 18:02 ` [PATCH 03/15] irq: mips: simplify do_domain_IRQ() Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-24 15:31 ` Thomas Bogendoerfer 2021-10-24 15:31 ` Thomas Bogendoerfer 2021-10-28 17:07 ` Guenter Roeck 2021-10-28 17:07 ` Guenter Roeck 2021-10-28 17:11 ` Mark Rutland 2021-10-28 17:11 ` Mark Rutland 2021-10-21 18:02 ` [PATCH 04/15] irq: simplify handle_domain_{irq,nmi}() Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 10:52 ` Marc Zyngier 2021-10-22 10:52 ` Marc Zyngier 2021-10-22 15:05 ` Mark Rutland 2021-10-22 15:05 ` Mark Rutland 2021-10-21 18:02 ` [PATCH 05/15] irq: add generic_handle_arch_irq() Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 2:10 ` Pingfan Liu 2021-10-22 2:10 ` Pingfan Liu 2021-10-22 9:02 ` Mark Rutland 2021-10-22 9:02 ` Mark Rutland 2021-10-22 2:33 ` Guo Ren 2021-10-22 2:33 ` Guo Ren 2021-10-22 8:52 ` Mark Rutland 2021-10-22 8:52 ` Mark Rutland 2021-10-24 1:53 ` Guo Ren 2021-10-24 1:53 ` Guo Ren 2021-10-21 18:02 ` [PATCH 06/15] irq: arc: avoid CONFIG_HANDLE_DOMAIN_IRQ Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-21 18:02 ` [PATCH 07/15] irq: nds32: " Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 6:35 ` Greentime Hu 2021-10-22 6:35 ` Greentime Hu 2021-10-21 18:02 ` [PATCH 08/15] irq: add a (temporary) CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-21 18:02 ` [PATCH 09/15] irq: arm: perform irqentry in entry code Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 15:18 ` Vladimir Murzin 2021-10-22 15:18 ` Vladimir Murzin 2021-10-22 15:36 ` Mark Rutland 2021-10-22 15:36 ` Mark Rutland 2021-10-22 16:34 ` Vladimir Murzin 2021-10-22 16:34 ` Vladimir Murzin 2021-10-22 17:58 ` Mark Rutland 2021-10-22 17:58 ` Mark Rutland 2021-10-22 18:43 ` Marc Zyngier 2021-10-22 18:43 ` Marc Zyngier 2021-10-23 12:06 ` Vladimir Murzin 2021-10-23 12:06 ` Vladimir Murzin 2021-10-23 13:18 ` Marc Zyngier 2021-10-23 13:18 ` Marc Zyngier 2021-10-23 13:36 ` Vladimir Murzin 2021-10-23 13:36 ` Vladimir Murzin 2021-11-30 8:49 ` Vladimir Murzin 2021-11-30 8:49 ` Vladimir Murzin 2021-12-01 7:56 ` Marc Zyngier 2021-12-01 7:56 ` Marc Zyngier 2021-10-21 18:02 ` [PATCH 10/15] irq: arm64: " Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 1:57 ` Pingfan Liu 2021-10-22 1:57 ` Pingfan Liu 2021-10-25 18:00 ` Catalin Marinas 2021-10-25 18:00 ` Catalin Marinas 2021-10-21 18:02 ` [PATCH 11/15] irq: csky: " Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 2:19 ` Guo Ren 2021-10-22 2:19 ` Guo Ren 2021-10-22 2:26 ` Guo Ren 2021-10-22 2:26 ` Guo Ren 2021-10-21 18:02 ` [PATCH 12/15] irq: openrisc: " Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 20:40 ` Stafford Horne 2021-10-22 20:40 ` Stafford Horne 2021-10-21 18:02 ` [PATCH 13/15] irq: riscv: " Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 1:59 ` Guo Ren 2021-10-22 1:59 ` Guo Ren 2021-10-27 21:22 ` Palmer Dabbelt 2021-10-27 21:22 ` Palmer Dabbelt 2021-10-21 18:02 ` [PATCH 14/15] irq: remove CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-21 18:02 ` [PATCH 15/15] irq: remove handle_domain_{irq,nmi}() Mark Rutland 2021-10-21 18:02 ` Mark Rutland 2021-10-22 10:05 ` Marc Zyngier 2021-10-22 10:05 ` Marc Zyngier 2021-10-22 15:06 ` Mark Rutland 2021-10-22 15:06 ` Mark Rutland 2021-10-22 1:26 ` [PATCH 00/15] " Linus Torvalds 2021-10-22 1:26 ` Linus Torvalds 2021-10-22 11:20 ` Marc Zyngier 2021-10-22 11:20 ` Marc Zyngier 2021-10-22 15:10 ` Mark Rutland 2021-10-22 15:10 ` Mark Rutland 2021-10-23 16:06 ` Marc Zyngier 2021-10-23 16:06 ` Marc Zyngier
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