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dataplane: add virtio-blk data plane code
virtio-blk-data-plane is a subset implementation of virtio-blk. It onlyhandles read, write, and flush requests. It does this using a dedicatedthread that executes an epoll(2)-based event loop and processes I/O...
virtio-blk: restore VirtIOBlkConf->config_wce flag
Two slightly different versions of a patch to conditionally setVIRTIO_BLK_F_CONFIG_WCE through the "config-wce" qdev property have beenapplied (ea776abca and eec7f96c2). David Gibson<david@gibson.dropbear.id.au> noticed that the "config-wce"...
virtio-blk: Remove duplicate property definition
For the virtio-blk device (via virtio-pci) the property "config-wce" isdefined in two places. First, it's defined from theDEFINE_VIRTIO_BLK_FEATURES macro, second it's defined directly invirtio-pci, just two lines above the call to that macro....
Merge remote-tracking branch 'kwolf/for-anthony' into staging
virtio-blk: hide VIRTIO_BLK_F_CONFIG_WCE from old machine types
QEMU has a policy of keeping a stable guest device ABI. When new guest devicefeatures are introduced they must not change hardware info seen by existingguests. This is important because operating systems or applications may...
virtio-blk: support VIRTIO_BLK_F_CONFIG_WCE
Also rename VIRTIO_BLK_F_WCACHE to VIRTIO_BLK_F_WCE for consistency withthe spec.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Kevin Wolf <kwolf@redhat.com>
hw/block-common: Move BlockConf & friends from block.h
This stuff doesn't belong to block layer, and was put there onlybecause a better home didn't exist then. Now it does.
Signed-off-by: Markus Armbruster <armbru@redhat.com>Signed-off-by: Kevin Wolf <kwolf@redhat.com>
virtio-blk: define VirtIOBlkConf
We will have to add another field to the virtio-blk configuration inthe next patch. Avoid a proliferation of arguments to virtio_blk_init.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
virtio-blk: always enable VIRTIO_BLK_F_SCSI
VIRTIO_BLK_F_SCSI is supposed to mean whether the host can parseSCSI requests, not execute them. You could run QEMU with scsi=onand a file-backed disk, and QEMU would fail all SCSI requests eventhough it advertises VIRTIO_BLK_F_SCSI....
Use new macro QEMU_PACKED for packed structures
Most changes were made using these commands:
git grep -la '__attribute__((packed))'|xargs perl -pi -e 's/__attribute__\(\(packed\)\)/QEMU_PACKED/'git grep -la '__attribute__ ((packed))'|xargs perl -pi -e 's/__attribute__ \(\(packed\)\)/QEMU_PACKED/'...
virtio-blk: Turn drive serial into a qdev property
It needs to be a qdev property, because it belongs to the drive'sguest part. Precedence: commit a0fef654 and 6ced55a5.
Bonus: info qtree now shows the serial number.
Signed-off-by: Markus Armbruster <armbru@redhat.com>...
Add virtio disk identification support
This patch adds the final missing bits for support ofpassing a serial/id string to a virtio-blk guest driver.
The guest-side component already exists in the virtiodriver, and has recently been reworked by Ryan to export...
block: add logical_block_size property
Add a logical block size attribute as various guest side tools onlyincrease the filesystem sector size based on it, not the advisoryphysical block size.
For scsi we already have support for a different logical block size...
virtio-blk: add topology support
Export all topology information in the block config structure,guarded by a new VIRTIO_BLK_F_TOPOLOGY feature flag.
Signed-off-by: Christoph Hellwig <hch@lst.de>Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
virtio-blk: revert serial number support
The addition of the whole ATA IDENTIY page caused the config space togo above the allowed size in the PCI spec, and thus the feature wasalready reverted in the Linux guest driver and disabled by default inqemu....
virtio: add features as qdev properties
Add feature bits as properties to virtio. This makes it possible to e.g. definemachine without indirect buffer support, which is required for 0.10compatibility, or without hardware checksum support, which is required for 0.11...
virtio-blk: add volatile writecache feature
Add a new VIRTIO_BLK_F_WCACHE feature to virtio-blk to indicate that we havea volatile write cache that needs controlled flushing. Implement aVIRTIO_BLK_T_FLUSH operation to flush it.
Signed-off-by: Christoph Hellwig <hch@lst.de>...
Add serial number support for virtio_blk
[brought forward to current qemu-kvm.git]
This patch implements the missing qemu logic tointerpret a '-drive .. serial=XYZ ..' flag fora virtio_blk device.
The serial number string is contained in askeletal IDENTIFY DEVICE data structure and...
Separate virtio PCI code
Split the PCI host bindings from the VRing transport implementation.
Signed-off-by: Paul Brook <paul@codesourcery.com>
Virtio-blk qdev conversion
fix virtio_blk_inhdr comment
The inhdr is at the end of the S/G list, not the beginning.
virtio-blk: add SGI_IO passthru support
[had the qemu list address wrong the first time, reply to this message, not the previous if you were on Cc]
Add support for SG_IO passthru (packet commands) to the virtio-blkbackend. Conceptually based on an older patch from Hannes Reinecke...
pci: virtio: use pci id defines (Gerd Hoffman)
Use the defines added by the previous patch in the virtio drivers.Also remove the pointless vendor and device args from thevirtio_blk_init() function.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>...
Add virtio-blk support
Virtio-blk is a paravirtual block device based on VirtIO. It can be used byspecifying the if=virtio parameter to the -drive parameter.
When using -enable-kvm, it can achieve very good performance compared to IDE orSCSI.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>...