From: tglx@linutronix.de (Thomas Gleixner)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v11 06/10] genirq/msi-doorbell: msi_doorbell_safe
Date: Fri, 22 Jul 2016 14:44:02 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.11.1607221443090.3906@nanos> (raw)
In-Reply-To: <3f188661-1d68-199b-3fcc-4da432bae633@redhat.com>
On Thu, 21 Jul 2016, Auger Eric wrote:
> On 20/07/2016 10:12, Thomas Gleixner wrote:
> > On Tue, 19 Jul 2016, Eric Auger wrote:
> >> +bool msi_doorbell_safe(void)
> >> +{
> >> + struct irqchip_doorbell *db;
> >> + bool irq_remapping = true;
> >> +
> >> + mutex_lock(&irqchip_doorbell_mutex);
> >> + list_for_each_entry(db, &irqchip_doorbell_list, next) {
> >> + irq_remapping &= db->info.irq_remapping;
> >
> > db->info.irq_remapping is set in msi_doorbell_register(). So you can keep book
> > about that there. No need to iterate here.
> Yes makes sense to store the info at registration time. Currently this
> function is not in any fast path but that's cleaner from a general
> perspective. I will need to do such iteration at un-registration though.
Two simple counter should be sufficient.
nr_registered_bells;
nr_remapped_bells;
....
Thanks,
tglx
next prev parent reply other threads:[~2016-07-22 12:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-19 13:02 [PATCH v11 00/10] KVM PCIe/MSI passthrough on ARM/ARM64: kernel part 2/3: msi changes Eric Auger
2016-07-19 13:02 ` [PATCH v11 01/10] genirq/msi: export msi_get_domain_info Eric Auger
2016-07-19 13:02 ` [PATCH v11 02/10] genirq/msi: msi_compose wrapper Eric Auger
2016-07-19 13:02 ` [PATCH v11 03/10] genirq/irq: introduce msi_doorbell_info Eric Auger
2016-07-19 14:15 ` Thomas Gleixner
2016-07-19 13:02 ` [PATCH v11 04/10] genirq/msi-doorbell: allow MSI doorbell (un)registration Eric Auger
2016-07-19 14:22 ` Thomas Gleixner
2016-07-20 7:50 ` Auger Eric
2016-07-19 13:02 ` [PATCH v11 05/10] genirq/msi-doorbell: msi_doorbell_pages Eric Auger
2016-07-19 14:38 ` Thomas Gleixner
2016-07-20 7:50 ` Auger Eric
2016-07-21 13:38 ` Auger Eric
2016-07-19 13:02 ` [PATCH v11 06/10] genirq/msi-doorbell: msi_doorbell_safe Eric Auger
2016-07-20 8:12 ` Thomas Gleixner
2016-07-21 13:38 ` Auger Eric
2016-07-22 12:44 ` Thomas Gleixner [this message]
2016-07-22 14:08 ` Auger Eric
2016-07-19 13:02 ` [PATCH v11 07/10] irqchip/gicv2m: register the MSI global doorbell Eric Auger
2016-07-19 13:02 ` [PATCH v11 08/10] irqchip/gicv3-its: " Eric Auger
2016-07-19 13:02 ` [PATCH v11 09/10] genirq/msi: map/unmap the MSI doorbells on msi_domain_alloc/free_irqs Eric Auger
2016-07-20 9:04 ` Thomas Gleixner
2016-07-25 16:21 ` Auger Eric
2016-07-26 9:00 ` Thomas Gleixner
2016-07-26 9:54 ` Auger Eric
2016-07-26 11:01 ` Thomas Gleixner
2016-07-19 13:02 ` [PATCH v11 10/10] genirq/msi: use the MSI doorbell's IOVA when requested Eric Auger
2016-07-20 9:09 ` Thomas Gleixner
2016-07-25 16:31 ` Auger Eric
2016-07-26 9:04 ` Thomas Gleixner
2016-07-26 10:02 ` Auger Eric
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