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From: Julien Grall <julien.grall@linaro.org>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Vijay Kilari <vijay.kilari@gmail.com>,
	Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
	Prasun Kapoor <Prasun.Kapoor@caviumnetworks.com>,
	Vijaya Kumar K <vijaya.kumar@caviumnetworks.com>,
	xen-devel@lists.xen.org,
	Stefano Stabellini <stefano.stabellini@citrix.com>
Subject: Re: [RFC PATCH v1 10/10] xen/arm: GICv3 device tree parsing
Date: Tue, 01 Apr 2014 14:07:47 +0100	[thread overview]
Message-ID: <533ABA23.6030507@linaro.org> (raw)
In-Reply-To: <1396357190.8667.162.camel@kazak.uk.xensource.com>

On 04/01/2014 01:59 PM, Ian Campbell wrote:
> On Tue, 2014-03-25 at 12:33 +0000, Julien Grall wrote:
>> But, I'm more worry about other OS than Linux (e.g FreeRTOS, *BSD,...)
>> which may not support GICv2 before a while.
> 
> Note that this is dependent on the hardware, v2 compat mode is optional
> in v3 and emulating a v2 gic on v3 without this functionality is going
> to be hard and complicated enough that I think we should rule that out
> right now, at least for the medium term.

> Even if v2 compat is available in the h/w I'd much rather we got basic
> support for GICv3 in as a first step and then start worrying about
> guests which need v2 compat mode to be present.

Right. I'd like to make sure that even if we don't support vGICv2 on
GICv3 right now, we are going to the right direction to support it. So
the interface is clearly defined between GIC and VGIC emulation and we
don't have lots of "if gicv2_host then foo" in guest code.

-- 
Julien Grall

  reply	other threads:[~2014-04-01 13:07 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-19 14:17 [RFC PATCH v1 00/10] xen/arm: Add GICv3 support vijay.kilari
2014-03-19 14:17 ` [RFC PATCH v1 01/10] xen/arm: make secondary gic init as notifier call vijay.kilari
2014-03-20 12:48   ` Julien Grall
2014-03-22  8:16     ` Vijay Kilari
2014-03-23 14:38       ` Julien Grall
2014-03-26 11:27         ` Vijay Kilari
2014-03-26 14:41           ` Julien Grall
2014-03-26 17:22             ` George Dunlap
2014-03-21 17:15   ` Ian Campbell
2014-03-22  8:32     ` Vijay Kilari
2014-03-22 13:54       ` Julien Grall
2014-03-24 10:53         ` Ian Campbell
2014-03-19 14:17 ` [RFC PATCH v1 02/10] xen/arm: register mmio handler at runtime vijay.kilari
2014-03-20 13:18   ` Julien Grall
2014-03-21 13:19     ` Andrii Tseglytskyi
2014-03-21 17:17   ` Ian Campbell
2014-03-21 17:23     ` Julien Grall
2014-03-26 12:29       ` Vijay Kilari
2014-03-26 14:47         ` Julien Grall
2014-03-27  5:40           ` Vijay Kilari
2014-03-27 15:02             ` Julien Grall
2014-04-01  9:34               ` Vijay Kilari
2014-04-01 11:00                 ` Julien Grall
2014-04-01 12:32                   ` Vijay Kilari
2014-04-01 12:44                     ` Ian Campbell
2014-04-01 12:51                     ` Julien Grall
2014-04-01 13:05                       ` Vijay Kilari
2014-04-01 13:56                         ` Julien Grall
2014-03-19 14:17 ` [RFC PATCH v1 03/10] xen/arm: move vgic data to vgic driver vijay.kilari
2014-03-20 13:51   ` Julien Grall
2014-03-21 17:23     ` Ian Campbell
2014-03-22  9:20       ` Vijay Kilari
2014-03-24 10:57         ` Ian Campbell
2014-03-26 11:44           ` Vijay Kilari
2014-03-26 12:00             ` Ian Campbell
2014-03-26 12:42               ` Vijay Kilari
2014-03-22  9:17     ` Vijay Kilari
2014-03-20 17:14   ` Stefano Stabellini
2014-03-20 17:56     ` Julien Grall
2014-03-20 18:11       ` Stefano Stabellini
2014-03-21  9:22         ` Ian Campbell
2014-03-19 14:17 ` [RFC PATCH v1 04/10] arm/xen: move gic save and restore registers to gic driver vijay.kilari
2014-03-20 15:22   ` Julien Grall
2014-03-21 17:26     ` Ian Campbell
2014-03-22  9:22     ` Vijay Kilari
2014-03-20 17:23   ` Stefano Stabellini
2014-03-21 17:28     ` Ian Campbell
2014-03-22  9:27     ` Vijay Kilari
2014-03-19 14:17 ` [RFC PATCH v1 05/10] xen/arm: move gic definitions to seperate file vijay.kilari
2014-03-20 15:13   ` Julien Grall
2014-03-19 14:17 ` [RFC PATCH v1 06/10] xen/arm: split gic driver into generic and gicv2 driver vijay.kilari
2014-03-20 11:55   ` Stefano Stabellini
2014-03-22  9:32     ` Vijay Kilari
2014-03-23 14:43       ` Julien Grall
2014-03-24 11:01         ` Ian Campbell
2014-03-20 16:02   ` Julien Grall
2014-03-21 17:32     ` Ian Campbell
2014-03-21 17:37       ` Julien Grall
2014-03-22  9:40     ` Vijay Kilari
2014-03-23 15:05       ` Julien Grall
2014-03-20 16:39   ` Stefano Stabellini
2014-03-21 17:38   ` Ian Campbell
2014-03-22  9:59     ` Vijay Kilari
2014-03-24 11:06       ` Ian Campbell
2014-03-19 14:17 ` [RFC PATCH v1 07/10] xen/arm: split vgic into generic and GIC v2 specific drivers vijay.kilari
2014-03-19 14:17 ` [RFC PATCH v1 08/10] xen/arm: Add support for GIC v3 vijay.kilari
2014-03-20 12:37   ` Stefano Stabellini
2014-03-22 10:07     ` Vijay Kilari
2014-03-24 11:28       ` Ian Campbell
2014-03-24 17:01       ` Stefano Stabellini
2014-03-26 13:16         ` Vijay Kilari
2014-03-26 17:22           ` Stefano Stabellini
2014-03-20 16:40   ` Julien Grall
2014-03-22 10:21     ` Vijay Kilari
2014-03-23 14:49       ` Julien Grall
2014-03-24 11:26         ` Ian Campbell
2014-03-24 11:50           ` Julien Grall
2014-03-24 17:02       ` Stefano Stabellini
2014-03-19 14:17 ` [RFC PATCH v1 09/10] xen/arm: Add vgic " vijay.kilari
2014-03-20 12:38   ` Stefano Stabellini
2014-03-19 14:17 ` [RFC PATCH v1 10/10] xen/arm: GICv3 device tree parsing vijay.kilari
2014-03-20 16:08   ` Julien Grall
2014-03-22 10:30     ` Vijay Kilari
2014-03-24 11:43       ` Ian Campbell
2014-03-24 12:03         ` Julien Grall
2014-03-24 12:07           ` Ian Campbell
2014-03-24 12:08           ` Julien Grall
2014-03-24 17:34             ` Stefano Stabellini
2014-03-24 18:00               ` Julien Grall
2014-03-25 11:04                 ` Stefano Stabellini
2014-03-25 12:33                   ` Julien Grall
2014-03-25 12:34                     ` Julien Grall
2014-04-01 12:59                     ` Ian Campbell
2014-04-01 13:07                       ` Julien Grall [this message]
2014-03-20 11:55 ` [RFC PATCH v1 00/10] xen/arm: Add GICv3 support Stefano Stabellini

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