From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Liguori <aliguori@us.ibm.com>
Subject: Re: [PATCH RFC] virtio-pci: new config layout: using memory BAR
Date: Wed, 05 Jun 2013 16:50:00 -0500
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To: "H. Peter Anvin" <hpa@zytor.com>, "Michael S. Tsirkin" <mst@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, Stefan Hajnoczi <stefanha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, KONRAD Frederic <fred.konrad@greensocs.com>
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"H. Peter Anvin" <hpa@zytor.com> writes:

> On 06/05/2013 09:20 AM, Michael S. Tsirkin wrote:
>> 
>> Spec says IO and memory can be enabled/disabled, separately.
>> PCI Express spec says devices should work without IO.
>> 
>
> For "native endpoints".  Currently virtio would be a "legacy endpoint"
> which is quite correct -- it is compatible with a legacy interface.

Do legacy endpoints also use 4k for BARs?

If not, can't we use a new device id for native endpoints and call it a
day?  Legacy endpoints would continue using the existing BAR layout.

Regards,

Anthony Liguori

>
> 	-hpa
>
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