From: Marc Zyngier <marc.zyngier@arm.com> To: Julien Thierry <julien.thierry@arm.com> Cc: <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <daniel.thompson@linaro.org>, <joel@joelfernandes.org>, <christoffer.dall@arm.com>, <james.morse@arm.com>, <catalin.marinas@arm.com>, <will.deacon@arm.com>, <mark.rutland@arm.com>, Thomas Gleixner <tglx@linutronix.de>, Jason Cooper <jason@lakedaemon.net> Subject: Re: [PATCH v9 20/26] irqchip/gic-v3: Handle pseudo-NMIs Date: Tue, 29 Jan 2019 12:31:00 +0000 [thread overview] Message-ID: <868sz3ve63.wl-marc.zyngier@arm.com> (raw) In-Reply-To: <c332af8d-4529-dbb0-f760-0c2518823053@arm.com> On Tue, 29 Jan 2019 11:33:35 +0000, Julien Thierry <julien.thierry@arm.com> wrote: > > > > On 28/01/2019 11:59, Marc Zyngier wrote: > > On Mon, 21 Jan 2019 15:33:39 +0000, > > Julien Thierry <julien.thierry@arm.com> wrote: > >> > >> Provide a higher priority to be used for pseudo-NMIs. When such an > >> interrupt is received, keep interrupts fully disabled at CPU level to > >> prevent receiving other pseudo-NMIs while handling the current one. > >> > >> Signed-off-by: Julien Thierry <julien.thierry@arm.com> > >> Cc: Thomas Gleixner <tglx@linutronix.de> > >> Cc: Jason Cooper <jason@lakedaemon.net> > >> Cc: Marc Zyngier <marc.zyngier@arm.com> > >> --- > >> drivers/irqchip/irq-gic-v3.c | 42 ++++++++++++++++++++++++++++++++++++------ > >> 1 file changed, 36 insertions(+), 6 deletions(-) > >> > >> diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c > >> index 5374b43..4df1e94 100644 > >> --- a/drivers/irqchip/irq-gic-v3.c > >> +++ b/drivers/irqchip/irq-gic-v3.c > >> @@ -41,6 +41,8 @@ > >> > >> #include "irq-gic-common.h" > >> > >> +#define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80) > >> + > >> #define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0) > >> > >> struct redist_region { > >> @@ -381,12 +383,45 @@ static u64 gic_mpidr_to_affinity(unsigned long mpidr) > >> return aff; > >> } > >> > >> +static inline void gic_deactivate_unexpected_irq(u32 irqnr) > > > > Same remark as on some other patches: you should be able to drop the > > inline attribute without any ill effect. I'd also like this to be > > renamed "gic_deactivate_spurious", or something similar. > > > > I'm a bit concern about using spurious since it is not related to > GICC_INT_SPURIOUS, we actually read a valid IRQ number, we just don't > know how we should handle it. Well, I'd say that in the case of GICC_INT_SPURIOUS, there is nothing to deactivate, but hey... ;-) > Would "gic_deactivate_unhandled" work? Or "gic_deactivate_bad"? Sure, any will do. M. -- Jazz is not dead, it just smell funny.
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <marc.zyngier@arm.com> To: Julien Thierry <julien.thierry@arm.com> Cc: mark.rutland@arm.com, daniel.thompson@linaro.org, Jason Cooper <jason@lakedaemon.net>, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, christoffer.dall@arm.com, james.morse@arm.com, joel@joelfernandes.org, Thomas Gleixner <tglx@linutronix.de>, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v9 20/26] irqchip/gic-v3: Handle pseudo-NMIs Date: Tue, 29 Jan 2019 12:31:00 +0000 [thread overview] Message-ID: <868sz3ve63.wl-marc.zyngier@arm.com> (raw) In-Reply-To: <c332af8d-4529-dbb0-f760-0c2518823053@arm.com> On Tue, 29 Jan 2019 11:33:35 +0000, Julien Thierry <julien.thierry@arm.com> wrote: > > > > On 28/01/2019 11:59, Marc Zyngier wrote: > > On Mon, 21 Jan 2019 15:33:39 +0000, > > Julien Thierry <julien.thierry@arm.com> wrote: > >> > >> Provide a higher priority to be used for pseudo-NMIs. When such an > >> interrupt is received, keep interrupts fully disabled at CPU level to > >> prevent receiving other pseudo-NMIs while handling the current one. > >> > >> Signed-off-by: Julien Thierry <julien.thierry@arm.com> > >> Cc: Thomas Gleixner <tglx@linutronix.de> > >> Cc: Jason Cooper <jason@lakedaemon.net> > >> Cc: Marc Zyngier <marc.zyngier@arm.com> > >> --- > >> drivers/irqchip/irq-gic-v3.c | 42 ++++++++++++++++++++++++++++++++++++------ > >> 1 file changed, 36 insertions(+), 6 deletions(-) > >> > >> diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c > >> index 5374b43..4df1e94 100644 > >> --- a/drivers/irqchip/irq-gic-v3.c > >> +++ b/drivers/irqchip/irq-gic-v3.c > >> @@ -41,6 +41,8 @@ > >> > >> #include "irq-gic-common.h" > >> > >> +#define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80) > >> + > >> #define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0) > >> > >> struct redist_region { > >> @@ -381,12 +383,45 @@ static u64 gic_mpidr_to_affinity(unsigned long mpidr) > >> return aff; > >> } > >> > >> +static inline void gic_deactivate_unexpected_irq(u32 irqnr) > > > > Same remark as on some other patches: you should be able to drop the > > inline attribute without any ill effect. I'd also like this to be > > renamed "gic_deactivate_spurious", or something similar. > > > > I'm a bit concern about using spurious since it is not related to > GICC_INT_SPURIOUS, we actually read a valid IRQ number, we just don't > know how we should handle it. Well, I'd say that in the case of GICC_INT_SPURIOUS, there is nothing to deactivate, but hey... ;-) > Would "gic_deactivate_unhandled" work? Or "gic_deactivate_bad"? Sure, any will do. M. -- Jazz is not dead, it just smell funny. _______________________________________________ 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:[~2019-01-29 12:31 UTC|newest] Thread overview: 166+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-21 15:33 [PATCH v9 00/26] arm64: provide pseudo NMI with GICv3 Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-21 15:33 ` [PATCH v9 01/26] arm64: Fix HCR.TGE status for NMI contexts Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-23 22:57 ` Sasha Levin 2019-01-23 22:57 ` Sasha Levin 2019-01-28 11:48 ` James Morse 2019-01-28 11:48 ` James Morse 2019-01-28 15:42 ` Julien Thierry 2019-01-28 15:42 ` Julien Thierry 2019-01-31 8:19 ` Christoffer Dall 2019-01-31 8:19 ` Christoffer Dall 2019-01-31 8:56 ` Julien Thierry 2019-01-31 8:56 ` Julien Thierry 2019-01-31 9:27 ` Christoffer Dall 2019-01-31 9:27 ` Christoffer Dall 2019-01-31 9:40 ` Julien Thierry 2019-01-31 9:40 ` Julien Thierry 2019-01-31 9:48 ` Christoffer Dall 2019-01-31 9:48 ` Christoffer Dall 2019-01-31 9:53 ` Marc Zyngier 2019-01-31 9:53 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 02/26] arm64: Remove unused daif related functions/macros Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:21 ` Marc Zyngier 2019-01-28 9:21 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 03/26] arm64: cpufeature: Set SYSREG_GIC_CPUIF as a boot system feature Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:22 ` Marc Zyngier 2019-01-28 9:22 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 04/26] arm64: cpufeature: Add cpufeature for IRQ priority masking Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:24 ` Marc Zyngier 2019-01-28 9:24 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 05/26] arm/arm64: gic-v3: Add PMR and RPR accessors Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:25 ` Marc Zyngier 2019-01-28 9:25 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 06/26] irqchip/gic-v3: Switch to PMR masking before calling IRQ handler Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:30 ` Marc Zyngier 2019-01-28 9:30 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 07/26] arm64: ptrace: Provide definitions for PMR values Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:37 ` Marc Zyngier 2019-01-28 9:37 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 08/26] arm64: Make PMR part of task context Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:42 ` Marc Zyngier 2019-01-28 9:42 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 09/26] arm64: Unmask PMR before going idle Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-22 15:23 ` Catalin Marinas 2019-01-22 15:23 ` Catalin Marinas 2019-01-22 20:18 ` Ard Biesheuvel 2019-01-22 20:18 ` Ard Biesheuvel 2019-01-23 8:56 ` Julien Thierry 2019-01-23 8:56 ` Julien Thierry 2019-01-23 9:38 ` Ard Biesheuvel 2019-01-23 9:38 ` Ard Biesheuvel 2019-01-28 9:44 ` Marc Zyngier 2019-01-28 9:44 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 10/26] arm64: kvm: Unmask PMR before entering guest Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 9:58 ` Marc Zyngier 2019-01-28 9:58 ` Marc Zyngier 2019-01-28 9:58 ` Marc Zyngier 2019-01-30 12:07 ` Christoffer Dall 2019-01-30 12:07 ` Christoffer Dall 2019-01-30 14:58 ` Julien Thierry 2019-01-30 14:58 ` Julien Thierry 2019-01-21 15:33 ` [PATCH v9 11/26] efi: Let architectures decide the flags that should be saved/restored Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-21 15:42 ` Ard Biesheuvel 2019-01-21 15:42 ` Ard Biesheuvel 2019-01-23 9:04 ` Julien Thierry 2019-01-23 9:04 ` Julien Thierry 2019-01-28 10:00 ` Marc Zyngier 2019-01-28 10:00 ` Marc Zyngier 2019-01-28 10:00 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 12/26] arm64: irqflags: Use ICC_PMR_EL1 for interrupt masking Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-21 15:45 ` Ard Biesheuvel 2019-01-21 15:45 ` Ard Biesheuvel 2019-01-21 18:05 ` Julien Thierry 2019-01-21 18:05 ` Julien Thierry 2019-01-22 15:21 ` Catalin Marinas 2019-01-22 15:21 ` Catalin Marinas 2019-01-23 10:44 ` Julien Thierry 2019-01-23 10:44 ` Julien Thierry 2019-01-30 11:52 ` Julien Thierry 2019-01-30 11:52 ` Julien Thierry 2019-01-21 15:33 ` [PATCH v9 13/26] arm64: daifflags: Include PMR in daifflags restore operations Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 10:37 ` Marc Zyngier 2019-01-28 10:37 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 14/26] arm64: alternative: Allow alternative status checking per cpufeature Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 11:00 ` Marc Zyngier 2019-01-28 11:00 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 15/26] arm64: alternative: Apply alternatives early in boot process Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 11:17 ` Marc Zyngier 2019-01-28 11:17 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 16/26] irqchip/gic-v3: Factor group0 detection into functions Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 11:19 ` Marc Zyngier 2019-01-28 11:19 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 17/26] arm64: Switch to PMR masking when starting CPUs Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 11:21 ` Marc Zyngier 2019-01-28 11:21 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 18/26] arm64: gic-v3: Implement arch support for priority masking Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 11:23 ` Marc Zyngier 2019-01-28 11:23 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 19/26] irqchip/gic-v3: Detect if GIC can support pseudo-NMIs Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 11:39 ` Marc Zyngier 2019-01-28 11:39 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 20/26] irqchip/gic-v3: Handle pseudo-NMIs Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 11:59 ` Marc Zyngier 2019-01-28 11:59 ` Marc Zyngier 2019-01-29 11:33 ` Julien Thierry 2019-01-29 11:33 ` Julien Thierry 2019-01-29 12:31 ` Marc Zyngier [this message] 2019-01-29 12:31 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 21/26] irqchip/gic: Add functions to access irq priorities Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 12:04 ` Marc Zyngier 2019-01-28 12:04 ` Marc Zyngier 2019-01-29 11:36 ` Julien Thierry 2019-01-29 11:36 ` Julien Thierry 2019-01-21 15:33 ` [PATCH v9 22/26] irqchip/gic-v3: Allow interrupts to be set as pseudo-NMI Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-26 10:19 ` liwei (GF) 2019-01-26 10:19 ` liwei (GF) 2019-01-26 10:41 ` Marc Zyngier 2019-01-26 10:41 ` Marc Zyngier 2019-01-28 8:57 ` Julien Thierry 2019-01-28 8:57 ` Julien Thierry 2019-01-28 13:59 ` liwei (GF) 2019-01-28 13:59 ` liwei (GF) 2019-01-28 14:49 ` Julien Thierry 2019-01-28 14:49 ` Julien Thierry 2019-01-28 12:08 ` Marc Zyngier 2019-01-28 12:08 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 23/26] arm64: Handle serror in NMI context Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 12:26 ` Marc Zyngier 2019-01-28 12:26 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 24/26] arm64: Skip preemption when exiting an NMI Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 12:34 ` Marc Zyngier 2019-01-28 12:34 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 25/26] arm64: Skip irqflags tracing for NMI in IRQs disabled context Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 12:40 ` Marc Zyngier 2019-01-28 12:40 ` Marc Zyngier 2019-01-21 15:33 ` [PATCH v9 26/26] arm64: Enable the support of pseudo-NMIs Julien Thierry 2019-01-21 15:33 ` Julien Thierry 2019-01-28 12:47 ` Marc Zyngier 2019-01-28 12:47 ` Marc Zyngier 2019-01-30 13:46 ` Julien Thierry 2019-01-30 13:46 ` Julien Thierry
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