linux-kernel - Re: [PATCH] vfio/iommu_type1: report the IOMMU aperture info

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Message-ID: <358f3253-6113-2d19-def7-d5d71dc78aaa@arm.com>
Date:   Thu, 30 Nov 2017 15:23:00 +0000
From:   Jean-Philippe Brucker <jean-philippe.brucker@....com>
To:     Pierre Morel <pmorel@...ux.vnet.ibm.com>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>
Cc:     "cohuck@...hat.com" <cohuck@...hat.com>,
        "borntraeger@...ibm.com" <borntraeger@...ibm.com>,
        "zyimin@...ux.vnet.ibm.com" <zyimin@...ux.vnet.ibm.com>,
        "pasic@...ux.vnet.ibm.com" <pasic@...ux.vnet.ibm.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] vfio/iommu_type1: report the IOMMU aperture info

On 30/11/17 14:49, Pierre Morel wrote:
[...]
> Shouldn't the 52bit problem be reported by the iommu geometry?

Yes, and most IOMMUs seem to set force_aperture. My comment was only about
default values to adopt in case a new IOMMU driver doesn't set
force_aperture to true.

Thanks,
Jean