From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: xen-devel@lists.xenproject.org, Keir Fraser <keir@xen.org>
Subject: Re: [PATCH v2 4/4] xen: expose that grant table mappings update the IOMMU
Date: Thu, 24 Apr 2014 09:43:22 +0200 [thread overview]
Message-ID: <5358C09A.3020200@citrix.com> (raw)
In-Reply-To: <5357AB53020000780000B4B7@nat28.tlf.novell.com>
On 23/04/14 12:00, Jan Beulich wrote:
>>>> On 23.04.14 at 10:16, <roger.pau@citrix.com> wrote:
>> Add a new XENFEAT_hvm_gntmap_supports_iommu that is used to check
>> whether the hypervisor properly updates the IOMMU on auto-translated
>> guests when doing a grant table map/unmap operation.
>
> Considering Boris' pending introduction of a hypervisor capabilities
> CPUID leaf, I wonder whether we shouldn't stop surfacing HVM-only
> features via XENFEAT_* flags (which afaict originally were meant to
> be a PV vehicle only anyway).
I don't have a strong opinion on the best way to publish this feature,
so if you prefer to do it using the new CPUID leaf, I will rework this
patch (although I have to say using XENFEAT_* seems easier).
Roger.
next prev parent reply other threads:[~2014-04-24 7:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-23 8:16 [PATCH v2 0/4] Fix grant map/unmap with auto-translated guests Roger Pau Monne
2014-04-23 8:16 ` [PATCH v2 1/4] xen: make logdirty and iommu mutually exclusive Roger Pau Monne
2014-04-23 9:54 ` Jan Beulich
2014-04-24 7:36 ` Roger Pau Monné
2014-04-24 11:57 ` Roger Pau Monné
2014-04-24 11:50 ` Tim Deegan
2014-04-23 8:16 ` [PATCH v2 2/4] iommu: set correct IOMMU entries when iommu_hap_pt_share == 0 Roger Pau Monne
2014-04-23 9:56 ` Jan Beulich
2014-04-24 11:52 ` Tim Deegan
2014-05-08 18:38 ` Konrad Rzeszutek Wilk
2014-04-23 8:16 ` [PATCH v2 3/4] amd-iommu: disable iommu_hap_pt_share with AMD IOMMUs Roger Pau Monne
2014-04-23 9:57 ` Jan Beulich
2014-04-23 10:04 ` Roger Pau Monné
2014-04-23 10:51 ` Jan Beulich
2014-04-23 14:31 ` Roger Pau Monné
2014-04-23 14:35 ` Jan Beulich
2014-04-23 8:16 ` [PATCH v2 4/4] xen: expose that grant table mappings update the IOMMU Roger Pau Monne
2014-04-23 10:00 ` Jan Beulich
2014-04-24 7:43 ` Roger Pau Monné [this message]
2014-04-24 8:23 ` Jan Beulich
2014-05-08 18:39 ` Konrad Rzeszutek Wilk
2014-05-09 6:32 ` Jan Beulich
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