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Latest revision as of 00:03, 29 January 2013
Virt PCI Express Q35
Summary
Emulate PCI Express, preferably by default. PCI Express is required for Advanced Error Reporting support.
Down the road it will enable features such as alternative requester id, multiple pci domains.
Owner
- Name: Cole Robinson
- Email: crobinso@redhat.com
- Name: Michael Tsirkin
- Email: mst@redhat.com
Current status
- Targeted release: Fedora 19
- Last updated: Jan 26 2013
- Percentage of completion: 30%
Detailed Description
This is an infrastructure change. When working properly we get the same functionality as now by default.
When configured, Express Root port devices will be visible to guest.
XXX: More info here about why this is really interesting
Benefit to Fedora
- Express Root port devices will be visible to guest.
- Enhanced error reporting of assigned devices.
- Enables Native hotplug support.
XXX: explain these
Scope
- QEMU Q35 (available as of 1.3)
- AHCI Migration issues? https://lists.gnu.org/archive/html/qemu-devel/2013-01/msg03103.html
- No need to specify custom acpi tables (queued for 1.4)
- Seabios support (DONE, in 1.7.2)
- Will not be the default for 1.4 though...
- Though sounds like there are still issues: http://www.seabios.org/pipermail/seabios/2013-January/005330.html
- Libvirt support (patches posted)
How To Test
XXX: fixme
User Experience
Express Root port devices will be visible to guest.
XXX: expand this
Dependencies
None.
Contingency Plan
Since this is brand new functionality, if it isn't ready in time, nothing has changed. We just drop this feature page.
Documentation
- http://www.linux-kvm.org/wiki/images/2/2e/2010-forum-Pci-express-in-qemu.pdf
- http://wiki.qemu.org/Features/Q35
- Libvirt patch posting
Release Notes
XXX: fixme
Comments and Discussion
- None yet