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Subject: [OASIS Issue Tracker] Updated: (VIRTIO-39) pci device operation without BAR access

     [ http://tools.oasis-open.org/issues/browse/VIRTIO-39?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Tsirkin updated VIRTIO-39:

    Proposal: 1383084766-22208-1-git-send-email-mst@redhat.com">http://mid.gmane.org/1383084766-22208-1-git-send-email-mst@redhat.com>  (was: 1383084766-22208-1-git-send-email-mst@redhat.com">http://mid.gmane.org/1383084766-22208-1-git-send-email-mst@redhat.com)

> pci device operation without BAR access
> ---------------------------------------
>                 Key: VIRTIO-39
>                 URL: http://tools.oasis-open.org/issues/browse/VIRTIO-39
>             Project: OASIS Virtual I/O Device (VIRTIO) TC
>          Issue Type: Improvement
>            Reporter: Michael Tsirkin
>            Assignee: Michael Tsirkin
> pci express spec forbids exclusive dependency on IO BAR accesses for device operation.
> on the other hand, restricted environments such as pxe have
> trouble accessing memory BARs.
> This calls for a fallback mechanism for device access.

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