From: Christoph Hellwig <hch@infradead.org>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org,
Daniel Drake <drake@endlessm.com>
Subject: Re: [PATCH 2/2] iommu/vt-d: Ignore devices with out-of-spec domain number
Date: Mon, 16 Mar 2020 08:53:08 -0700 [thread overview]
Message-ID: <20200316155308.GC18704@infradead.org> (raw)
In-Reply-To: <20200312060955.8523-3-baolu.lu@linux.intel.com>
On Thu, Mar 12, 2020 at 02:09:55PM +0800, Lu Baolu wrote:
> @@ -128,6 +129,13 @@ dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event)
>
> BUG_ON(dev->is_virtfn);
>
> + /*
> + * Ignore devices that have a domain number higher than what can
> + * be looked up in DMAR, e.g. VMD subdevices with domain 0x10000
> + */
> + if (pci_domain_nr(dev->bus) > U16_MAX)
I think this needs a well documented core PCI layer function, as that
is where these "fake" domains are create.
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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>,
iommu@lists.linux-foundation.org,
Daniel Drake <drake@endlessm.com>,
linux-pci@vger.kernel.org
Subject: Re: [PATCH 2/2] iommu/vt-d: Ignore devices with out-of-spec domain number
Date: Mon, 16 Mar 2020 08:53:08 -0700 [thread overview]
Message-ID: <20200316155308.GC18704@infradead.org> (raw)
In-Reply-To: <20200312060955.8523-3-baolu.lu@linux.intel.com>
On Thu, Mar 12, 2020 at 02:09:55PM +0800, Lu Baolu wrote:
> @@ -128,6 +129,13 @@ dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event)
>
> BUG_ON(dev->is_virtfn);
>
> + /*
> + * Ignore devices that have a domain number higher than what can
> + * be looked up in DMAR, e.g. VMD subdevices with domain 0x10000
> + */
> + if (pci_domain_nr(dev->bus) > U16_MAX)
I think this needs a well documented core PCI layer function, as that
is where these "fake" domains are create.
next prev parent reply other threads:[~2020-03-16 15:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-12 6:09 [PULL REQUEST] iommu/vt-d: fixes for v5.6 Lu Baolu
2020-03-12 6:09 ` [PATCH 1/2] iommu/vt-d: Fix the wrong printing in RHSA parsing Lu Baolu
2020-03-12 6:09 ` [PATCH 2/2] iommu/vt-d: Ignore devices with out-of-spec domain number Lu Baolu
2020-03-16 15:53 ` Christoph Hellwig [this message]
2020-03-16 15:53 ` Christoph Hellwig
2020-03-13 13:41 ` [PULL REQUEST] iommu/vt-d: fixes for v5.6 Joerg Roedel
2020-03-13 13:46 ` Joerg Roedel
2020-03-14 1:23 ` Lu Baolu
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