From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Daniel Drake <drake@endlessm.com>,
linaro-kernel@lists.linaro.org, patches@linaro.org,
Linux Kernel <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"
<linux-arm-kernel@lists.infradead.org>,
Jon Medhurst <tixy@linaro.org>,
Marc Zyngier <marc.zyngier@arm.com>
Subject: Re: [PATCH 3.17-rc4 v7 0/6] arm: Implement arch_trigger_all_cpu_backtrace
Date: Tue, 4 Nov 2014 17:19:40 +0000 [thread overview]
Message-ID: <20141104171939.GI4042@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <54590755.1070204@linaro.org>
On Tue, Nov 04, 2014 at 05:05:25PM +0000, Daniel Thompson wrote:
> This week with the help of one of my colleagues (thanks Tixy) I have
> been able to run some tests and figure out what it going on on vexpress-a9.
>
> The summary is that on some GICv1 implementations the bit to enable
> group 1 interrupts cannot be accessed using secure memory accesses. More
> specifically the presence/absence of the EnableGrp1 bit in the secure
> version GICD_CTRL register is implementation defined.
>
> My original patches overlooked this and as a result the existing code
> will migrate all interrupts to group but then cannot enable delivery of
> group 1 interrupts.
>
> I'm planning to respin the code so it will automatically disable FIQ
> support when the EnableGrp1 bit is not implemented. This means
> vexpress-a9 will not benefit from FIQ support but will also not be
> harmed by it.
That's good news, and it should mean that the Versatile Express starts
booting on the nightly boot tests again. Thanks for looking into it.
--
FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2014-11-04 17:19 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
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 [this message]
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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