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<p><em>Subject</em>: <b>RE: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</b></p>

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<ul>
<li><em>From</em>: <b>Parav Pandit &lt;&#x70;&#97;r&#97;v&#64;n&#x76;&#105;&#x64;ia.c&#x6f;&#109;&gt;</b></li>
<li><em>To</em>: Jason Wang &lt;&#x6a;a&#x73;owang&#x40;r&#x65;&#100;&#x68;at&#x2e;&#99;om&gt;</li>
<li><em>Date</em>: Fri, 9 Jun 2023 02:53:06 +0000</li>
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<pre>
&gt; From: Jason Wang &lt;&#106;&#97;&#115;o&#119;&#x61;&#110;&#103;&#64;&#114;&#101;d&#104;at&#x2e;&#x63;&#111;&#x6d;&gt;
&gt; Sent: Thursday, June 8, 2023 10:43 PM

&gt; &gt; It is passthrough device, none of the 1.x objects are accessible or mediated by
&gt; the hypervisor.
&gt; 
&gt; Let me quote my reply once again:
&gt; 
&gt; &quot;
&gt; Hypervisor just need to prepare
&gt; 
&gt; 1) legacy BAR with legacy config and device configuration space
&gt; 2) modern BAR with modern capabilities (common cfg and device cfg)
&gt; 
This is what is done in v5.

&gt; For 2) it could be mapped directly to guest without any mediation For
&gt; 1) hypervisor needs to mediate
&gt; &quot;
&gt; 
&gt; There's zero mediation for 1.x objects at all. No?
&gt; 

&gt; For accessing 1.x objects by hypervisor, what's wrong with that especially
&gt; considering it is used for legacy mediation only but not modern? 
I didn&#xE2;t follow the question.

&gt; (Btw, how do
&gt; you define 1.x objects, isn't any facility via adminq an 1.x object?)
&gt; 
1.x objects of the passthrough VF device.

&gt; In order to converge the discussion, maybe you can explain which one of your 3
&gt; use cases and why can't work with _F_LEGACY_HEADER + _F_LEGACY_MAC.
Hypervisor does not involve in feature negotiation and device life cycle phase so it cannot negotiate it.
</pre>
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<li><strong><a name="00218" href="msg00218.html">Re: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Jason Wang &lt;j&#x61;&#x73;ow&#97;&#110;&#103;&#64;r&#x65;&#x64;h&#97;&#116;.&#99;&#x6f;&#109;&gt;</li></ul></li>
</ul></li></ul>
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<ul><li><strong>References</strong>:
<ul>
<li><strong><a name="00052" href="msg00052.html">Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> &quot;Michael S. Tsirkin&quot; &lt;m&#x73;&#x74;&#64;r&#101;&#x64;ha&#x74;.&#x63;&#111;&#x6d;&gt;</li></ul></li>
<li><strong><a name="00054" href="msg00054.html">RE: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;pa&#x72;a&#x76;&#64;n&#x76;&#x69;&#x64;ia.&#99;om&gt;</li></ul></li>
<li><strong><a name="00055" href="msg00055.html">Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> &quot;Michael S. Tsirkin&quot; &lt;&#109;&#115;t&#x40;&#x72;&#101;d&#104;a&#116;&#46;c&#111;m&gt;</li></ul></li>
<li><strong><a name="00057" href="msg00057.html">RE: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;p&#x61;rav&#x40;&#110;&#118;i&#x64;&#105;a&#46;co&#109;&gt;</li></ul></li>
<li><strong><a name="00064" href="msg00064.html">Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> &quot;Michael S. Tsirkin&quot; &lt;ms&#116;&#64;redh&#x61;t.c&#111;&#x6d;&gt;</li></ul></li>
<li><strong><a name="00074" href="msg00074.html">RE: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;&#112;&#97;r&#x61;v&#64;nv&#x69;&#100;&#105;&#x61;&#x2e;co&#x6d;&gt;</li></ul></li>
<li><strong><a name="00075" href="msg00075.html">Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> &quot;Michael S. Tsirkin&quot; &lt;m&#115;t&#64;re&#x64;h&#x61;t&#46;com&gt;</li></ul></li>
<li><strong><a name="00076" href="msg00076.html">RE: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;&#x70;&#97;&#114;av&#x40;n&#x76;&#x69;&#100;ia&#46;&#x63;&#111;&#109;&gt;</li></ul></li>
<li><strong><a name="00084" href="msg00084.html">Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> &quot;Michael S. Tsirkin&quot; &lt;&#109;&#115;t&#x40;&#114;edhat.co&#x6d;&gt;</li></ul></li>
<li><strong><a name="00085" href="msg00085.html">RE: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;par&#97;v&#64;n&#118;&#x69;&#x64;&#x69;a&#46;&#99;om&gt;</li></ul></li>
<li><strong><a name="00091" href="msg00091.html">Re: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> &quot;Michael S. Tsirkin&quot; &lt;mst&#64;&#114;e&#x64;&#104;a&#x74;.c&#111;m&gt;</li></ul></li>
<li><strong><a name="00135" href="msg00135.html">Re: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Jason Wang &lt;j&#x61;&#115;o&#119;&#97;&#x6e;g&#64;&#x72;&#101;&#x64;&#x68;&#97;&#x74;.&#99;o&#109;&gt;</li></ul></li>
<li><strong><a name="00139" href="msg00139.html">RE: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;p&#x61;&#114;&#97;v&#64;&#x6e;&#118;&#x69;d&#x69;a.&#x63;o&#109;&gt;</li></ul></li>
<li><strong><a name="00144" href="msg00144.html">Re: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Jason Wang &lt;j&#x61;s&#x6f;wang&#64;r&#x65;dhat&#x2e;c&#x6f;&#x6d;&gt;</li></ul></li>
<li><strong><a name="00180" href="msg00180.html">RE: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;&#112;&#97;&#x72;a&#118;&#64;n&#118;i&#100;&#x69;a&#46;&#x63;&#111;&#109;&gt;</li></ul></li>
<li><strong><a name="00214" href="msg00214.html">Re: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Jason Wang &lt;&#x6a;&#97;so&#119;&#x61;&#x6e;g&#64;r&#x65;d&#104;&#x61;&#116;&#x2e;co&#x6d;&gt;</li></ul></li>
<li><strong><a name="00215" href="msg00215.html">RE: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Parav Pandit &lt;parav&#64;&#110;vid&#x69;&#97;&#x2e;&#x63;&#111;m&gt;</li></ul></li>
<li><strong><a name="00216" href="msg00216.html">Re: [virtio-dev] Re: [PATCH v3 0/3] transport-pci: Introduce legacy registers access using AQ</a></strong>
<ul><li><em>From:</em> Jason Wang &lt;&#x6a;as&#x6f;wan&#103;&#x40;&#114;e&#100;h&#97;&#x74;.co&#109;&gt;</li></ul></li>
</ul></li></ul>
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