00343e4b54
This commit introduces a new vhost-user device for block, it uses a
chardev to connect with the backend, same with Qemu virito-blk device,
Guest OS still uses the virtio-blk frontend driver.
To use it, start QEMU with command line like this:
qemu-system-x86_64 \
-chardev socket,id=char0,path=/path/vhost.socket \
-device vhost-user-blk-pci,chardev=char0,num-queues=2, \
bootindex=2... \
Users can use different parameters for `num-queues` and `bootindex`.
Different with exist Qemu virtio-blk host device, it makes more easy
for users to implement their own I/O processing logic, such as all
user space I/O stack against hardware block device. It uses the new
vhost messages(VHOST_USER_GET_CONFIG) to get block virtio config
information from backend process.
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
12 lines
356 B
Makefile
12 lines
356 B
Makefile
CONFIG_PCI=y
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CONFIG_VIRTIO_PCI=$(CONFIG_PCI)
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CONFIG_VHOST_USER_SCSI=$(call land,$(CONFIG_VHOST_USER),$(CONFIG_LINUX))
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CONFIG_VHOST_USER_BLK=$(call land,$(CONFIG_VHOST_USER),$(CONFIG_LINUX))
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CONFIG_VIRTIO=y
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CONFIG_SCLPCONSOLE=y
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CONFIG_TERMINAL3270=y
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CONFIG_S390_FLIC=y
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CONFIG_S390_FLIC_KVM=$(CONFIG_KVM)
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CONFIG_VFIO_CCW=$(CONFIG_LINUX)
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CONFIG_WDT_DIAG288=y
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