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qemu/hw/block
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Stefano Garzarella 37b06f8d46 virtio-blk: add DISCARD and WRITE_ZEROES features 
This patch adds the support of DISCARD and WRITE_ZEROES commands,
that have been introduced in the virtio-blk protocol to have
better performance when using SSD backend.

We support only one segment per request since multiple segments
are not widely used and there are no userspace APIs that allow
applications to submit multiple segments in a single call.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20190221103314.58500-7-sgarzare@redhat.com
Message-Id: <20190221103314.58500-7-sgarzare@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-02-22 09:42:17 +00:00
..
dataplane xen-block: handle resize callback 2019-02-04 11:04:49 +00:00
block.c block: Remove deprecated -drive option serial 2018-08-15 12:50:39 +02:00
cdrom.c block: Clean up includes 2016-01-20 13:36:23 +01:00
ecc.c block: Clean up includes 2016-01-20 13:36:23 +01:00
fdc.c fdc: fix segfault in fdctrl_stop_transfer() when DMA is disabled 2018-11-19 12:51:22 +01:00
hd-geometry.c Include less of the generated modular QAPI headers 2018-03-02 13:45:50 -06:00
m25p80.c hw/block: Use the IEC binary prefix definitions 2018-07-02 15:41:13 +02:00
Makefile.objs xen: remove the legacy 'xen_disk' backend 2019-01-14 13:45:40 +00:00
nand.c Replace all occurances of __FUNCTION__ with __func__ 2018-01-22 09:46:18 +01:00
nvme.c nvme: use pci_dev directly in nvme_realize 2019-01-31 00:38:19 +01:00
nvme.h qemu/queue.h: leave head structs anonymous unless necessary 2019-01-11 15:46:55 +01:00
onenand.c block/noenand: Convert sysbus init function to realize function 2018-12-13 13:47:57 +00:00
pflash_cfi01.c hw/block/pflash_cfi: Convert from DPRINTF() macro to trace events 2018-06-29 15:04:18 +01:00
pflash_cfi02.c hw/block/pflash_cfi: Convert from DPRINTF() macro to trace events 2018-06-29 15:04:18 +01:00
tc58128.c hw/block/tc58128.c: Don't use load_image() 2018-12-14 13:30:52 +00:00
trace-events xen-block: handle resize callback 2019-02-04 11:04:49 +00:00
vhost-user-blk.c vhost-user-blk: add discard/write zeroes features support 2019-02-05 10:58:33 -05:00
virtio-blk.c virtio-blk: add DISCARD and WRITE_ZEROES features 2019-02-22 09:42:17 +00:00
xen-block.c xen-block: handle resize callback 2019-02-04 11:04:49 +00:00
xen_blkif.h xen: import ring.h from xen 2017-04-21 12:41:29 -07:00