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From: Joerg Roedel <joro@8bytes.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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 13:53:42 +0100	[thread overview]
Message-ID: <20180315125342.q74wurk6bdbhl6hy@8bytes.org> (raw)
In-Reply-To: <20180223222736.18542-6-bigeasy@linutronix.de>

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.

  reply	other threads:[~2018-03-15 12:53 UTC|newest]

Thread overview: 39+ 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 ` 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   ` 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   ` 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   ` 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
2018-02-23 22:27   ` Sebastian Andrzej Siewior
2018-03-15 12:54   ` Joerg Roedel
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
2018-02-23 22:27   ` Sebastian Andrzej Siewior
2018-03-15 12:53   ` Joerg Roedel [this message]
2018-03-15 13:01     ` Sebastian Andrzej Siewior
2018-03-15 13:01       ` Sebastian Andrzej Siewior
2018-03-15 13:07       ` Joerg Roedel
2018-03-15 13:07         ` Joerg Roedel
2018-03-15 14:15         ` Sebastian Andrzej Siewior
2018-03-15 14:15           ` Sebastian Andrzej Siewior
2018-03-15 15:19           ` Joerg Roedel
2018-03-15 15:19             ` Joerg Roedel
2018-03-15 15:25             ` Sebastian Andrzej Siewior
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   ` 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   ` 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
2018-02-23 22:27   ` Sebastian Andrzej Siewior
2018-03-15 12:58   ` Joerg Roedel
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   ` Sebastian Andrzej Siewior
2018-02-23 22:27 ` [PATCH 10/10] iommu/amd: make amd_iommu_devtable_lock a spin_lock Sebastian Andrzej Siewior
2018-02-23 22:27   ` Sebastian Andrzej Siewior
2018-03-15 13:01 ` iommu/amd: lock splitting & GFP_KERNEL allocation Joerg Roedel
2018-03-15 13:01   ` Joerg Roedel

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