From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
tglx@linutronix.de
Subject: Re: [PATCH 05/10] iommu/amd: remove the special case from get_irq_table()
Date: Thu, 15 Mar 2018 14:01:53 +0100 [thread overview]
Message-ID: <20180315130153.3ba2loj5oplogdew@linutronix.de> (raw)
In-Reply-To: <20180315125342.q74wurk6bdbhl6hy@8bytes.org>
On 2018-03-15 13:53:42 [+0100], Joerg Roedel wrote:
> On Fri, Feb 23, 2018 at 11:27:31PM +0100, Sebastian Andrzej Siewior wrote:
> > @@ -4103,10 +4093,26 @@ static int irq_remapping_alloc(struct irq_domain *domain, unsigned int virq,
> > return ret;
> >
> > if (info->type == X86_IRQ_ALLOC_TYPE_IOAPIC) {
> > - if (get_irq_table(devid, true))
> > + struct irq_remap_table *table;
> > + struct amd_iommu *iommu;
> > +
> > + table = get_irq_table(devid);
> > + if (table) {
> > + if (!table->min_index) {
> > + /*
> > + * Keep the first 32 indexes free for IOAPIC
> > + * interrupts.
> > + */
> > + table->min_index = 32;
> > + iommu = amd_iommu_rlookup_table[devid];
> > + for (i = 0; i < 32; ++i)
> > + iommu->irte_ops->set_allocated(table, i);
> > + }
>
> I think this needs to be protected by the table->lock.
Which part any why? The !->min_index part plus extending(setting to 32)?
Sebastian
next prev parent reply other threads:[~2018-03-15 13:01 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-23 22:27 iommu/amd: lock splitting & GFP_KERNEL allocation Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 01/10] iommu/amd: take into account that alloc_dev_data() may return NULL Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 02/10] iommu/amd: turn dev_data_list into a lock less list Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 03/10] iommu/amd: split domain id out of amd_iommu_devtable_lock Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 04/10] iommu/amd: split irq_lookup_table out of the amd_iommu_devtable_lock Sebastian Andrzej Siewior
2018-03-15 12:54 ` Joerg Roedel
2018-02-23 22:27 ` [PATCH 05/10] iommu/amd: remove the special case from get_irq_table() Sebastian Andrzej Siewior
2018-03-15 12:53 ` Joerg Roedel
2018-03-15 13:01 ` Sebastian Andrzej Siewior [this message]
2018-03-15 13:07 ` Joerg Roedel
2018-03-15 14:15 ` Sebastian Andrzej Siewior
2018-03-15 15:19 ` Joerg Roedel
2018-03-15 15:25 ` Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 06/10] iommu/amd: use `table' instead `irt' as variable name in amd_iommu_update_ga() Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 07/10] iommu/amd: factor out setting the remap table for a devid Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 08/10] iommu/amd: drop the lock while allocating new irq remap table Sebastian Andrzej Siewior
2018-03-15 12:58 ` Joerg Roedel
2018-02-23 22:27 ` [PATCH 09/10] iommu/amd: declare irq_remap_table's and amd_iommu's lock as a raw_spin_lock Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 10/10] iommu/amd: make amd_iommu_devtable_lock a spin_lock Sebastian Andrzej Siewior
2018-03-15 13:01 ` iommu/amd: lock splitting & GFP_KERNEL allocation Joerg Roedel
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