From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
Ian Campbell <Ian.Campbell@citrix.com>,
"will.deacon@arm.com" <will.deacon@arm.com>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
"nico@linaro.org" <nico@linaro.org>
Subject: Re: [PATCH v2 6/6] [RFC] arm: use PSCI if available
Date: Tue, 26 Mar 2013 15:09:02 +0000 [thread overview]
Message-ID: <alpine.DEB.2.02.1303261508370.4430@kaball.uk.xensource.com> (raw)
In-Reply-To: <201303261458.55183.arnd@arndb.de>
On Tue, 26 Mar 2013, Arnd Bergmann wrote:
> On Tuesday 26 March 2013, Stefano Stabellini wrote:
> > Check for the presence of PSCI before setting smp_ops, use PSCI if it is
> > available.
> >
> > This is useful because at least when running on Xen it's possible to have a
> > PSCI node for example on a Versatile Express or an Exynos5 machine. In these
> > cases the PSCI SMP calls should be the ones to be called.
> >
> > Remove virt_smp_ops and platsmp.c from mach-virt because they aren't needed
> > anymore.
>
> Very nice, I had a similar idea but had not gotten around to write a patch.
> This fits in nicely with my plans to make all fields of machine_desc optional.
>
> > void __init smp_set_ops(struct smp_operations *ops)
> > {
> > - if (ops)
> > + int rc = -ENODEV;
> > +#ifdef CONFIG_ARM_PSCI
> > + rc = psci_init(&smp_ops);
> > +#endif
> > + if (rc && ops)
> > smp_ops = *ops;
> > };
>
> Could you move this into the caller, i.e. setup_arch() so we call smp_set_ops
> either for psci_smp_ops or for machine_desc->smp?
Sure, I can do that.
next prev parent reply other threads:[~2013-03-26 15:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-26 14:40 [PATCH v2 0/6] xen/arm: move to mach-virt and support SMP Stefano Stabellini
2013-03-26 14:41 ` [PATCH v2 1/6] xen/arm: actually pass a non-NULL percpu pointer to request_percpu_irq Stefano Stabellini
2013-03-26 14:41 ` [PATCH v2 2/6] xen/arm: SMP support Stefano Stabellini
2013-03-26 14:41 ` [PATCH v2 3/6] xen: move the xenvm machine to mach-virt Stefano Stabellini
2013-03-26 14:41 ` [PATCH v2 4/6] xen/arm: implement HYPERVISOR_vcpu_op Stefano Stabellini
2013-03-26 14:41 ` [PATCH v2 5/6] xenvm: add a simple PSCI node and a second cpu Stefano Stabellini
2013-03-26 15:00 ` Arnd Bergmann
2013-03-26 16:39 ` Stefano Stabellini
2013-03-26 14:41 ` [PATCH v2 6/6] [RFC] arm: use PSCI if available Stefano Stabellini
2013-03-26 14:58 ` Arnd Bergmann
2013-03-26 15:09 ` Stefano Stabellini [this message]
2013-03-26 15:04 ` Will Deacon
2013-03-26 15:25 ` Stefano Stabellini
2013-03-26 15:37 ` Will Deacon
2013-03-26 15:46 ` Arnd Bergmann
2013-03-26 15:55 ` Stefano Stabellini
2013-03-26 16:03 ` Nicolas Pitre
2013-03-27 11:15 ` Stefano Stabellini
2013-03-26 15:49 ` Stefano Stabellini
2013-03-26 16:01 ` Nicolas Pitre
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