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由 Laine Stump 提交于
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)
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