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This patch adds two capabilities flags to deal with various aspects of supporting SG_IO commands on virtio-blk-pci devices: QEMU_CAPS_VIRTIO_BLK_SCSI set if -device virtio-blk-pci accepts the scsi="on|off" option When present, this is on by default, but can be set to off to disable SG_IO functions. QEMU_CAPS_VIRTIO_BLK_SG_IO set if SG_IO commands are supported in the virtio-blk-pci driver (present since qemu 0.11 according to a qemu developer, if I understood correctly)
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>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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