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External/libvirt

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qemu: complete vhostuser + passt support <interface type='vhostuser'><backend type='passt'/> needs to run the passt command just as is done for interface type='user', but then add vhostuser bits to the qemu commandline/monitor command. There are some changes to the parsing/validation along with changes to the vhostuser codepath do do the extra stuff for passt. I tried keeping them separated into different patches, but then the unit test failed in a strange way deep down in the bowels of the commandline generation, so this patch both 1) makes the final changes to parsing/formatting and 2) adds passt stuff at appropriate places for vhostuser (as well as making a couple of things *not* happen when the passt backend is chosen). The result is that you can now have: <interface type='vhostuser'> <backend type='passt'/> ... </interface> Then as long as you also have the following as a subelement of <domain>: <memoryBacking> <access mode='shared'/> </memoryBacking> your passt interfaces will benefit from the greatly improved efficiency of a vhost-user data path, and all without requiring special privileges or capabilities *anywhere* (i.e. it works for unprivileged libvirt (qemu:///session) as well as privileged libvirt). Resolves: https://issues.redhat.com/browse/RHEL-69455 Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>

2025-02-12 16:16:44 -05:00

unsupported configuration: The <portForward> element can only be used with the 'passt' backend of interface type='user' or type='vhostuser'