From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Daniel Thompson <daniel.thompson@linaro.org>
Cc: linaro-kernel@lists.linaro.org,
Jason Cooper <jason@lakedaemon.net>,
patches@linaro.org, Marc Zyngier <marc.zyngier@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org,
John Stultz <john.stultz@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Sumit Semwal <sumit.semwal@linaro.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3.17-rc4 v7 4/6] irqchip: gic: Add support for IPI FIQ
Date: Thu, 18 Sep 2014 08:48:39 +0100 [thread overview]
Message-ID: <20140918074839.GZ12361@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20140917210712.GY12361@n2100.arm.linux.org.uk>
On Wed, Sep 17, 2014 at 10:07:13PM +0100, Russell King - ARM Linux wrote:
> On Wed, Sep 17, 2014 at 01:12:23PM -0700, Daniel Thompson wrote:
> > I may have missed something but this sounds like the expected behaviour
> > to me.
> >
> > Without AckCtl set (GIC_CPU_CTRL bit 2) then it is not possible to
> > acknowledge group 1 interrupts from secure mode. Thus in the
> > circumstances described above I would expect the system to wedge in the
> > interrupt handler because IRQ is raised but the software is not able to
> > acknowledge it.
>
> Setting AckCtl (0x07) results in no change in behaviour - still crashes
> when it tries to calibrate the timer.
>
> > I think there may also problems with leaving CBPR unset. Leaving CBPR
> > unset certainly causes a change of behaviour compared to an all group0
> > setup.
>
> Also tried setting that (0x17), but still the same.
Another data point: SDP4430 boots fine with 0x17.
The Versatile Express has GIC ID/TYPER register values of:
GICC IDR: 0x3901043b GICD TYPER: 0x0000fc62
The SDP4430 has:
GICC IDR: 0x3901043b GICD TYPER: 0x0000fc24
so they should in theory be identical GICs, and should behave identically,
but they don't.
--
FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2014-09-18 7:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-17 16:10 [PATCH 3.17-rc4 v7 0/6] arm: Implement arch_trigger_all_cpu_backtrace Daniel Thompson
2014-09-17 16:10 ` [PATCH 3.17-rc4 v7 1/6] ARM: remove unused do_unexp_fiq() function Daniel Thompson
2014-09-17 16:10 ` [PATCH 3.17-rc4 v7 2/6] arm: fiq: Replace default FIQ handler Daniel Thompson
2014-09-17 16:10 ` [PATCH 3.17-rc4 v7 3/6] arm64: Introduce dummy version of asm/fiq.h Daniel Thompson
2014-09-22 9:16 ` Catalin Marinas
2014-09-17 16:10 ` [PATCH 3.17-rc4 v7 4/6] irqchip: gic: Add support for IPI FIQ Daniel Thompson
2014-09-17 18:51 ` Russell King - ARM Linux
2014-09-17 20:12 ` Daniel Thompson
2014-09-17 21:07 ` Russell King - ARM Linux
2014-09-18 7:48 ` Russell King - ARM Linux [this message]
2014-09-18 21:46 ` Marc Zyngier
2014-09-18 8:17 ` Russell King - ARM Linux
2014-09-18 21:20 ` Daniel Thompson
2014-09-17 16:10 ` [PATCH 3.17-rc4 v7 5/6] ARM: add basic support for on-demand backtrace of other CPUs Daniel Thompson
2014-09-17 16:10 ` [PATCH 3.17-rc4 v7 6/6] arm: smp: Handle ipi_cpu_backtrace() using FIQ (if available) Daniel Thompson
2014-10-14 22:37 ` [PATCH 3.17-rc4 v7 0/6] arm: Implement arch_trigger_all_cpu_backtrace Daniel Drake
2014-10-14 23:31 ` Russell King - ARM Linux
2014-10-16 9:33 ` Daniel Thompson
2014-11-04 17:05 ` Daniel Thompson
2014-11-04 17:19 ` Russell King - ARM Linux
2014-10-16 9:23 ` Daniel Thompson
2014-10-16 12:23 ` Russell King - ARM Linux
2014-10-16 13:15 ` Daniel Thompson
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