From: Julien Grall <julien.grall@linaro.org>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
xen-devel@lists.xensource.com
Cc: julien.grall@citrix.com, Ian.Campbell@citrix.com
Subject: Re: [PATCH v11 05/10] xen/arm: physical irq follow virtual irq
Date: Wed, 13 Aug 2014 16:48:43 +0100 [thread overview]
Message-ID: <53EB88DB.2010509@linaro.org> (raw)
In-Reply-To: <1407518033-10694-5-git-send-email-stefano.stabellini@eu.citrix.com>
Hi Stefano,
On 08/08/2014 06:13 PM, Stefano Stabellini wrote:
> Migrate physical irqs to the same physical cpu that is running the vcpu
> expected to receive the irqs. That is done when enabling irqs, when the
> guest writes to GICD_ITARGETSR and when Xen migrates a vcpu to a
> different pcpu.
>
> In case of virq migration, if the virq is inflight and in a GICH_LR
> register already, delay migrating the corresponding physical irq until
> the virq is EOIed by the guest and the MIGRATING flag has been cleared.
> This way we make sure that the pcpu running the old vcpu gets
> interrupted with a new irq of the same kind, clearing the GICH_LR sooner.
>
> Introduce a new arch specific function, arch_move_irqs, that is empty on
> x86 and implements the vgic irq migration code on ARM.
> arch_move_irqs is going to be called by from sched.c.
>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <julien.grall@linaro.org>
Regards,
--
Julien Grall
next prev parent reply other threads:[~2014-08-13 15:48 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-08 17:12 [PATCH v11 00/10] gic and vgic fixes and improvements Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 01/10] xen/arm: observe itargets setting in vgic_enable_irqs and vgic_disable_irqs Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 02/10] xen/arm: move setting GIC_IRQ_GUEST_QUEUED earlier Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 03/10] xen/arm: inflight irqs during migration Stefano Stabellini
2014-08-08 17:28 ` Julien Grall
2014-08-11 15:23 ` Stefano Stabellini
2014-08-13 15:35 ` Julien Grall
2014-08-08 17:13 ` [PATCH v11 04/10] xen/arm: support irq delivery to vcpu > 0 Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 05/10] xen/arm: physical irq follow virtual irq Stefano Stabellini
2014-08-13 15:48 ` Julien Grall [this message]
2014-08-08 17:13 ` [PATCH v11 06/10] xen: introduce sched_move_irqs Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 07/10] xen: remove workaround to inject evtchn_irq on irq enable Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 08/10] xen/arm: take the rank lock before accessing ipriority Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 09/10] xen: introduce bit access macros for the IRQ line status flags Stefano Stabellini
2014-08-08 17:13 ` [PATCH v11 10/10] xen/arm: make accesses to desc->status flags atomic Stefano Stabellini
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