This document discusses nested virtualization and PCI pass-through, which allow testing virtualized environments without requiring physical hardware. It provides information on host system configuration, including enabling VMCS shadowing and assigning devices to VMs. Configuration for OpenNebula management is also covered, such as modifying device filters and deployment tweaks to interface host devices. Resources for further information on related topics from Intel, Red Hat, and StorPool are included. The document concludes by thanking the audience and providing contact details for StorPool.

1. Nested virtualization & PCI pass-through
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2. 2

3. What is it
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4. Whyyyy
Test virtualized environments without
hardware
- 100s of hypervisors without 100s of physical
servers
- API, test automation, dynamic environment
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5. Hosts
BIOS settings, VT-d, VMCS shadow
kernel params: intel_iommu=on iommu=pt pci=realloc
Libvirt/qemu/KVM - /etc/modprobe.d/kvm.conf
options kvm-intel nested=1
options kvm-intel enable_shadow_vmcs=1
https://software.intel.com/en-us/blogs/2014/12/12/enabling-virtual-machine-
control-structure-shadowing-on-a-nested-virtual-machine
https://access.redhat.com/documentation/en-
us/red_hat_enterprise_linux/5/html/virtualization/chap-virtualization-
pci_passthrough
https://access.redhat.com/documentation/en-
us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration
_guide/chap-guest_virtual_machine_device_configuration

6. OpenNebula
http://mars/#hosts-tab/0
http://mars/#templates-tab/3
/var/lib/one/remotes/etc/im/kvm-probes.d/pci.conf
device filter

7. OpenNebula
https://github.com/OpenNebula/addon-
storpool/blob/master/docs/advanced_configuration.
md#vms-domain-xml-tweaking
/var/lib/one/remotes/vmm/kvm/deploy-tweaks.d -
hostdev to interface hostdev

8. Boyan Krosnov
StorPool Storage
bk@storpool.com
www.storpool.com
@storpool
We are hiring!
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9. Boyan Krosnov
StorPool Storage
bk@storpool.com
www.storpool.com
@storpool
Thank you
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