From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: ux500: Initialize irq affinity
Date: Fri, 20 Jan 2012 16:03:28 +0000 [thread overview]
Message-ID: <4F199050.5080702@arm.com> (raw)
In-Reply-To: <CACRpkdYgT-Q+ZEzhjOaOb_2Pihx0-pMXo+Dc-CESDT7BAWAOqg@mail.gmail.com>
On 20/01/12 15:45, Linus Walleij wrote:
> On Fri, Jan 20, 2012 at 2:03 PM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
>> On Fri, Jan 20, 2012 at 01:59:16PM +0100, Per Fransson wrote:
>>> Use irq_set_affinity() to initialize the kernel view of irq affinity
>>> when programming the GIC registers.
>>
>> Why is this necessary?
>
> Necessary: we don't quite know. (Maybe should have been RFC, but
> this patch is better than being silent of it...)
>
> On the Ux500 all shared peripheral IRQs (32 thru 127) are delivered
> to CPU0 (hardwired, will not work on CPU1), I have heard that this
> is sort of what everybody does but don't know for sure. (Marc?)
Not as far as I know. My platforms seems to happily deliver interrupts
on other cores by setting the SMP affinity (just tested on my EB11MP).
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2012-01-20 16:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-20 12:59 [PATCH] ARM: ux500: Initialize irq affinity Per Fransson
2012-01-20 13:03 ` Russell King - ARM Linux
2012-01-20 15:45 ` Linus Walleij
2012-01-20 16:03 ` Marc Zyngier [this message]
2012-01-20 16:08 ` Will Deacon
2012-01-20 17:44 ` Russell King - ARM Linux
2012-01-20 21:28 ` Per Fransson
2012-01-22 12:54 ` Will Deacon
2012-01-22 15:27 ` Russell King - ARM Linux
2012-01-24 11:04 ` Will Deacon
2012-01-24 22:00 ` Linus Walleij
2012-01-20 17:50 ` Russell King - ARM Linux
2012-01-20 17:56 ` Linus Walleij
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