From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Bjorn Helgaas <helgaas-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
rwright-ZPxbGqLxI0U@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Subject: Re: possible dmar_init_reserved_ranges() error
Date: Fri, 23 Dec 2016 11:35:48 +0100 [thread overview]
Message-ID: <20161223103548.GH17255@8bytes.org> (raw)
In-Reply-To: <20161223004801.GA1096-1RhO1Y9PlrlHTL0Zs8A6p5iNqAH0jzoTYJqu5kTmcBRl57MIdRCFDg@public.gmane.org>
On Thu, Dec 22, 2016 at 06:48:01PM -0600, Bjorn Helgaas wrote:
> If we didn't want to use pcibios_resource_to_bus() here for some
> reason, we should at least add a comment about why we think it's OK to
> use a CPU physical address as an IOVA.
Even if there are no such x86 systems out there, I think it doesn't hurt
to handle the possibility correctly in the IOMMU drivers.
Joerg
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
linux-pci@vger.kernel.org, iommu@lists.linux-foundation.org,
David Woodhouse <dwmw2@infradead.org>,
linux-kernel@vger.kernel.org, rwright@hpe.com
Subject: Re: possible dmar_init_reserved_ranges() error
Date: Fri, 23 Dec 2016 11:35:48 +0100 [thread overview]
Message-ID: <20161223103548.GH17255@8bytes.org> (raw)
In-Reply-To: <20161223004801.GA1096@bhelgaas-glaptop.roam.corp.google.com>
On Thu, Dec 22, 2016 at 06:48:01PM -0600, Bjorn Helgaas wrote:
> If we didn't want to use pcibios_resource_to_bus() here for some
> reason, we should at least add a comment about why we think it's OK to
> use a CPU physical address as an IOVA.
Even if there are no such x86 systems out there, I think it doesn't hurt
to handle the possibility correctly in the IOMMU drivers.
Joerg
next prev parent reply other threads:[~2016-12-23 10:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-19 21:20 possible dmar_init_reserved_ranges() error Bjorn Helgaas
2016-12-19 21:20 ` Bjorn Helgaas
[not found] ` <20161219212044.GA21774-1RhO1Y9PlrlHTL0Zs8A6p5iNqAH0jzoTYJqu5kTmcBRl57MIdRCFDg@public.gmane.org>
2016-12-22 16:27 ` Joerg Roedel
2016-12-22 16:27 ` Joerg Roedel
2016-12-22 20:28 ` Bjorn Helgaas
[not found] ` <20161222202803.GA16855-1RhO1Y9PlrlHTL0Zs8A6p5iNqAH0jzoTYJqu5kTmcBRl57MIdRCFDg@public.gmane.org>
2016-12-22 23:32 ` Raj, Ashok
2016-12-22 23:32 ` Raj, Ashok
2016-12-22 23:45 ` Raj, Ashok
2016-12-22 23:45 ` Raj, Ashok
2016-12-23 0:48 ` Bjorn Helgaas
2016-12-23 0:48 ` Bjorn Helgaas
[not found] ` <20161223004801.GA1096-1RhO1Y9PlrlHTL0Zs8A6p5iNqAH0jzoTYJqu5kTmcBRl57MIdRCFDg@public.gmane.org>
2016-12-23 10:35 ` Joerg Roedel [this message]
2016-12-23 10:35 ` Joerg Roedel
2016-12-27 23:44 ` Bjorn Helgaas
[not found] ` <20161227234417.GA24366-1RhO1Y9PlrlHTL0Zs8A6p5iNqAH0jzoTYJqu5kTmcBRl57MIdRCFDg@public.gmane.org>
2016-12-28 3:21 ` Raj, Ashok
2016-12-28 3:21 ` Raj, Ashok
2017-01-04 14:39 ` Joerg Roedel
2017-01-04 14:39 ` Joerg Roedel
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