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Commit 6879be48 moved adding of an implicit video device after XML parsing. As a result, libxlDomainDeviceDefPostParse() is no longer called to set the default vram when adding an implicit device. Commit 6879be48 assumes virDomainVideoDefaultRAM() will set the default vram, but it returns 0 if the domain virtType is VIR_DOMAIN_VIRT_XEN. Attempting to start an HVM domain with vram=0 results in error: unsupported configuration: videoram must be at least 4MB for CIRRUS The default vram setting for Xen HVM domains depends on the device model used (qemu-xen vs qemu-traditional), hence setting the default is deferred to libxlDomainDeviceDefPostParse(). Call the device post-parse callback even for implicit video, to fill out the default vram even for VIR_DOMAIN_VIRT_XEN. https://bugzilla.redhat.com/show_bug.cgi?id=1334557 Most-of-commit-message-by: Jim Fehlig <jfehlig@suse.com>
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>