From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3] [RFC] arm: use PSCI if available
Date: Wed, 27 Mar 2013 18:03:45 +0000 [thread overview]
Message-ID: <201303271803.45420.arnd@arndb.de> (raw)
In-Reply-To: <51533037.5060004@gmail.com>
On Wednesday 27 March 2013, Rob Herring wrote:
> No, I was thinking in the case of Xen and mach-virt, you would not set
> mdesc->smp. So you would have something like this:
>
> if (mdesc->smp)
> smp_set_ops(mdesc->smp);
> else
> smp_set_ops(&psci_smp_ops);
The case that Stefano is interested in if obviously other platforms
that can either run as Dom0 under Xen with psci_smp_ops or natively
with their own smp_ops. A similar case would be a platform that
may implement psci using smc when run in secure mode but provide
its own smp_ops when run natively.
In both cases, it would be simpler to use psci if available but
fall back to mdesc->smp otherwise.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Rob Herring <robherring2@gmail.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Will Deacon <will.deacon@arm.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
Marc Zyngier <Marc.Zyngier@arm.com>,
"nico@linaro.org" <nico@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v3] [RFC] arm: use PSCI if available
Date: Wed, 27 Mar 2013 18:03:45 +0000 [thread overview]
Message-ID: <201303271803.45420.arnd@arndb.de> (raw)
In-Reply-To: <51533037.5060004@gmail.com>
On Wednesday 27 March 2013, Rob Herring wrote:
> No, I was thinking in the case of Xen and mach-virt, you would not set
> mdesc->smp. So you would have something like this:
>
> if (mdesc->smp)
> smp_set_ops(mdesc->smp);
> else
> smp_set_ops(&psci_smp_ops);
The case that Stefano is interested in if obviously other platforms
that can either run as Dom0 under Xen with psci_smp_ops or natively
with their own smp_ops. A similar case would be a platform that
may implement psci using smc when run in secure mode but provide
its own smp_ops when run natively.
In both cases, it would be simpler to use psci if available but
fall back to mdesc->smp otherwise.
Arnd
next prev parent reply other threads:[~2013-03-27 18:03 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-27 12:50 [PATCH v3] [RFC] arm: use PSCI if available Stefano Stabellini
2013-03-27 12:50 ` Stefano Stabellini
2013-03-27 12:50 ` Stefano Stabellini
2013-03-27 13:35 ` Marc Zyngier
2013-03-27 13:35 ` Marc Zyngier
2013-03-27 16:20 ` Rob Herring
2013-03-27 16:20 ` Rob Herring
2013-03-27 13:38 ` Will Deacon
2013-03-27 13:38 ` Will Deacon
2013-03-27 16:23 ` Stefano Stabellini
2013-03-27 16:23 ` Stefano Stabellini
2013-03-27 16:35 ` Rob Herring
2013-03-27 16:35 ` Rob Herring
2013-03-27 17:10 ` Stefano Stabellini
2013-03-27 17:10 ` Stefano Stabellini
2013-03-27 17:24 ` Nicolas Pitre
2013-03-27 17:24 ` Nicolas Pitre
2013-03-27 18:22 ` Stefano Stabellini
2013-03-27 18:22 ` Stefano Stabellini
2013-03-27 17:45 ` Rob Herring
2013-03-27 17:45 ` Rob Herring
2013-03-27 18:03 ` Arnd Bergmann [this message]
2013-03-27 18:03 ` Arnd Bergmann
2013-03-27 18:14 ` Stefano Stabellini
2013-03-27 18:14 ` Stefano Stabellini
2013-03-27 17:23 ` Will Deacon
2013-03-27 17:23 ` Will Deacon
2013-03-28 12:48 ` Stefano Stabellini
2013-03-28 12:48 ` Stefano Stabellini
2013-03-28 14:51 ` Nicolas Pitre
2013-03-28 14:51 ` Nicolas Pitre
2013-03-28 15:04 ` Rob Herring
2013-03-28 15:04 ` Rob Herring
2013-03-28 15:36 ` Stefano Stabellini
2013-03-28 15:36 ` Stefano Stabellini
2013-03-28 15:39 ` Nicolas Pitre
2013-03-28 15:39 ` Nicolas Pitre
2013-03-28 16:00 ` Will Deacon
2013-03-28 16:00 ` Will Deacon
2013-03-28 16:06 ` Nicolas Pitre
2013-03-28 16:06 ` Nicolas Pitre
2013-03-28 16:20 ` Stefano Stabellini
2013-03-28 16:20 ` Stefano Stabellini
2013-03-28 18:38 ` Rob Herring
2013-03-28 18:38 ` Rob Herring
2013-03-29 13:22 ` Stefano Stabellini
2013-03-29 13:22 ` Stefano Stabellini
2013-03-29 13:54 ` Rob Herring
2013-03-29 13:54 ` Rob Herring
2013-03-29 14:47 ` Stefano Stabellini
2013-03-29 14:47 ` Stefano Stabellini
2013-03-27 16:33 ` Rob Herring
2013-03-27 16:33 ` Rob Herring
2013-03-27 17:05 ` Will Deacon
2013-03-27 17:05 ` Will Deacon
2013-03-27 17:50 ` Arnd Bergmann
2013-03-27 17:50 ` Arnd Bergmann
2013-03-27 18:12 ` Will Deacon
2013-03-27 18:12 ` Will Deacon
2013-03-27 19:10 ` Rob Herring
2013-03-27 19:10 ` Rob Herring
2013-03-27 19:14 ` Arnd Bergmann
2013-03-27 19:14 ` Arnd Bergmann
2013-03-27 14:55 ` Rob Herring
2013-03-27 14:55 ` Rob Herring
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