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virtio-blk: deprecate SCSI passthrough

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The Linux virtio_blk.ko guest driver is removing legacy SCSI passthrough
support.  Deprecate this feature in QEMU too.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20191213144626.1208237-1-stefanha@redhat.com
Message-Id: <20191213144626.1208237-1-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2019-12-13 14:46:26 +00:00
parent aceeaa69d2
commit 5847c750f3
1 changed files with 11 additions and 0 deletions
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qemu-deprecated.texi
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@ -278,6 +278,17 @@ spec you can use the ``-cpu rv64gcsu,priv_spec=v1.9.1`` command line argument.
@section Device options
@subsection Emulated device options
@subsubsection -device virtio-blk,scsi=on|off (since 5.0.0)
The virtio-blk SCSI passthrough feature is a legacy VIRTIO feature. VIRTIO 1.0
and later do not support it because the virtio-scsi device was introduced for
full SCSI support. Use virtio-scsi instead when SCSI passthrough is required.
Note this also applies to ``-device virtio-blk-pci,scsi=on|off'', which is an
alias.
@subsection Block device options
@subsubsection "backing": "" (since 2.12.0)