From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: xen-devel@lists.xenproject.org, tim@xen.org,
stefano.stabellini@citrix.com
Subject: Re: [PATCH v3 10/18] xen/arm: IRQ: Require desc.lock held by callers of hw_irq_controller callbacks
Date: Wed, 16 Apr 2014 16:39:11 +0100 [thread overview]
Message-ID: <534EA41F.50005@linaro.org> (raw)
In-Reply-To: <1397662576.24638.214.camel@kazak.uk.xensource.com>
On 04/16/2014 04:36 PM, Ian Campbell wrote:
> On Tue, 2014-04-08 at 15:43 +0100, Julien Grall wrote:
>> When multiple action are supported, gic_irq_{startup,shutdown} will have
>> to be called in the same critical section as setup/release.
>> Otherwise there is a race condition if at the same time CPU A is calling
>> release_dt_irq and CPU B is calling setup_dt_irq.
>>
>> This could end up with the IRQ not being enabled.
>>
>> At the same time, modify gic_irq_{enable,disable} to require desc.lock held.
>
> "require that ... is held" or "require ... be held".
I guess, I also have to update the commit title, rigth?
I plan to change into:
"Require desc.lock be held by callers of hw_irq_controller callbacks"
>>
>> With this both changes, ARM's locking requirements is the same as x86's.
>
> "With both of these changes..."
>
>> Signed-off-by: Julien Grall <julien.grall@linaro.org>
>
> Acked-by: Ian Campbell <ian.campbell@citrix.com>
Thanks,
--
Julien Grall
next prev parent reply other threads:[~2014-04-16 15:39 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-08 14:43 [PATCH v3 00/18] xen/arm: Interrupt management reworking Julien Grall
2014-04-08 14:43 ` [PATCH v3 01/18] xen/arm: timer: replace timer_dt_irq by timer_get_irq Julien Grall
2014-04-16 15:27 ` Ian Campbell
2014-04-08 14:43 ` [PATCH v3 02/18] xen/arm: IRQ: Use default irq callback from common code for no_irq_type Julien Grall
2014-04-08 14:43 ` [PATCH v3 03/18] xen/arm: IRQ: Rename irq_cfg into arch_irq_desc Julien Grall
2014-04-08 14:43 ` [PATCH v3 04/18] xen/arm: IRQ: move gic {, un}lock in gic_set_irq_properties Julien Grall
2014-04-08 14:43 ` [PATCH v3 05/18] xen/arm: IRQ: drop irq parameter in __setup_irq Julien Grall
2014-04-08 14:43 ` [PATCH v3 06/18] xen/arm: IRQ: remove __init from setup_dt_irq, request_dt_irq and release_irq Julien Grall
2014-04-08 14:43 ` [PATCH v3 07/18] xen/arm: IRQ: Rework gic_route_irq_to_guest function Julien Grall
2014-04-16 15:31 ` Ian Campbell
2014-04-08 14:43 ` [PATCH v3 08/18] xen/arm: IRQ: Move IRQ management from gic.c to irq.c Julien Grall
2014-04-17 10:38 ` Ian Campbell
2014-04-08 14:43 ` [PATCH v3 09/18] xen/arm: IRQ Introduce irq_get_domain Julien Grall
2014-04-08 14:43 ` [PATCH v3 10/18] xen/arm: IRQ: Require desc.lock held by callers of hw_irq_controller callbacks Julien Grall
2014-04-16 15:36 ` Ian Campbell
2014-04-16 15:39 ` Julien Grall [this message]
2014-04-08 14:44 ` [PATCH v3 11/18] xen/arm: IRQ: Defer routing IRQ to Xen until setup_irq() call Julien Grall
2014-04-16 15:39 ` Ian Campbell
2014-04-08 14:44 ` [PATCH v3 12/18] xen/arm: IRQ: Do not allow IRQ to be shared between domains and XEN Julien Grall
2014-04-16 15:40 ` Ian Campbell
2014-04-21 19:16 ` Julien Grall
2014-04-08 14:44 ` [PATCH v3 13/18] xen/serial: remove serial_dt_irq Julien Grall
2014-04-17 10:22 ` Julien Grall
2014-04-17 10:35 ` Ian Campbell
2014-04-08 14:44 ` [PATCH v3 14/18] xen/arm: IRQ: Store IRQ type in arch_irq_desc Julien Grall
2014-04-16 15:45 ` Ian Campbell
2014-04-16 15:52 ` Julien Grall
2014-04-08 14:44 ` [PATCH v3 15/18] xen/arm: IRQ: Replace {request, setup}_dt_irq by {request, setup}_irq Julien Grall
2014-04-16 15:46 ` Ian Campbell
2014-04-08 14:44 ` [PATCH v3 16/18] xen: IRQ: Add dev_id parameter to release_irq Julien Grall
2014-04-08 14:55 ` Jan Beulich
2014-04-16 15:47 ` Ian Campbell
2014-04-08 14:44 ` [PATCH v3 17/18] xen/arm: IRQ: extend {request, setup}_irq to take an irqflags in parameter Julien Grall
2014-04-08 14:58 ` Jan Beulich
2014-04-16 15:46 ` Julien Grall
2014-04-16 15:48 ` Ian Campbell
2014-04-08 14:44 ` [PATCH v3 18/18] xen/arm: IRQ: Handle multiple action per IRQ Julien Grall
2014-04-08 14:59 ` Jan Beulich
2014-04-16 16:01 ` Julien Grall
2014-04-16 15:54 ` Ian Campbell
2014-04-16 16:06 ` Julien Grall
2014-04-16 16:17 ` Ian Campbell
2014-04-16 16:21 ` Jan Beulich
2014-04-16 16:23 ` Julien Grall
2014-04-17 7:07 ` Jan Beulich
2014-04-17 10:36 ` Julien Grall
2014-04-17 11:15 ` Jan Beulich
2014-04-17 11:22 ` Julien Grall
2014-04-17 11:36 ` Ian Campbell
2014-04-17 12:18 ` Julien Grall
2014-04-17 12:27 ` Ian Campbell
2014-04-17 12:35 ` Julien Grall
2014-04-17 10:26 ` [PATCH v3 00/18] xen/arm: Interrupt management reworking Julien Grall
2014-04-17 10:39 ` Ian Campbell
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