linux-kernel - Re: possible dmar_init_reserved

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Date:   Fri, 23 Dec 2016 11:35:48 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     "Raj, Ashok" <ashok.raj@...el.com>, linux-pci@...r.kernel.org,
        iommu@...ts.linux-foundation.org,
        David Woodhouse <dwmw2@...radead.org>,
        linux-kernel@...r.kernel.org, rwright@....com
Subject: Re: possible dmar_init_reserved_ranges() error

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