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37b06f8d46
qemu/hw
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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
..
9pfs xen: re-name XenDevice to XenLegacyDevice... 2019-01-14 13:45:40 +00:00
acpi qdev: pass an Object * to qbus_set_hotplug_handler() 2019-02-17 21:54:02 +11:00
adc
alpha hw/alpha/Makefile.objs: Create CONFIG_* for alpha 2019-02-05 16:50:20 +01:00
arm hw/arm/armsse: Fix miswiring of expansion IRQs 2019-02-15 09:56:39 +00:00
audio audio: fix pc speaker init 2019-01-24 13:10:19 +01:00
block virtio-blk: add DISCARD and WRITE_ZEROES features 2019-02-22 09:42:17 +00:00
bt char: allow specifying a GMainContext at opening time 2019-02-13 14:23:39 +01:00
char qdev: pass an Object * to qbus_set_hotplug_handler() 2019-02-17 21:54:02 +11:00
core virtio-blk: add "discard" and "write-zeroes" properties 2019-02-22 09:42:16 +00:00
cpu hw/cpu/cluster: Mark the cpu-cluster device with user_creatable = false 2019-02-06 15:55:56 +01:00
cris hw/cris/Makefile.objs: Create CONFIG_* for cris 2019-02-05 16:50:20 +01:00
display hw/display/milkymist-tmu2: Move inlined code from header to source 2019-02-01 11:58:50 +01:00
dma hw/dma/i8257: Use qemu_log_mask(UNIMP) instead of fprintf 2019-02-14 11:46:30 +01:00
gpio trace: enforce that every trace-events file has a final newline 2019-01-24 14:16:56 +00:00
hppa hw/hppa: forward requests to CPU HPA 2019-02-12 08:59:21 -08:00
hyperv hw/hyperv: fix NULL dereference with pure-kvm SynIC 2018-11-26 14:14:38 -02:00
i2c hw/i2c/Makefile.objs: Create new CONFIG_* variables for EEPROM and ACPI controller 2019-02-05 16:50:21 +01:00
i386 * cpu-exec fixes (Emilio, Laurent) 2019-02-05 19:39:22 +00:00
ide hw/ide: drop iov field from IDEDMA 2019-02-22 09:42:13 +00:00
input pckbd: Convert DPRINTF->trace 2019-02-14 11:46:30 +01:00
intc xics: Drop the KVM ICS class 2019-02-18 10:52:08 +11:00
ipack hw/ipack: Use the IEC binary prefix definitions 2018-07-02 15:41:12 +02:00
ipmi ipmi: Use proper struct reference for BT vmstate 2018-08-23 18:46:25 +02:00
isa char: allow specifying a GMainContext at opening time 2019-02-13 14:23:39 +01:00
lm32 hw/lm32/Makefile.objs: Conditionally build lm32 and milkmyst 2019-02-05 16:50:20 +01:00
m68k hw/m68k/Makefile.objs: Conditionally build boards 2019-02-05 16:50:19 +01:00
mem memory-device: rewrite address assignment using ranges 2019-01-09 22:09:31 -02:00
microblaze hw/microblaze/Makefile.objs: Create configs for petalogix and xilinx boards 2019-02-05 16:50:19 +01:00
mips hw/mips_int: hold BQL for all interrupt requests 2019-02-14 17:47:28 +01:00
misc cuda: decrease time delay before raising VIA SR interrupt and remove fast path 2019-02-17 21:54:02 +11:00
moxie hw/moxie/Makefile.objs: Conditionally build moxie 2019-02-05 16:50:20 +01:00
net virtio-net: make VirtIOFeature usable for other virtio devices 2019-02-22 09:42:16 +00:00
nios2 hw/nios2/Makefile.objs: Conditionally build nios2 2019-02-05 16:50:20 +01:00
nvram fw_cfg: fix the life cycle and the name of "qemu_extra_params_fw" 2019-02-05 10:58:33 -05:00
openrisc hw/openrisc/Makefile.objs: Create CONFIG_* for openrisc 2019-02-05 16:50:21 +01:00
pci qdev: pass an Object * to qbus_set_hotplug_handler() 2019-02-17 21:54:02 +11:00
pci-bridge pci/shpc: perform unplug via the hotplug handler 2018-12-20 11:19:12 -05:00
pci-host build: actually use CONFIG_PAM 2019-02-05 16:50:19 +01:00
pcmcia
ppc ppc patch queue 2019-02-19 2019-02-18 16:20:13 +00:00
rdma hw/rdma: modify struct initialization 2019-01-19 11:01:33 +02:00
riscv riscv: Ensure the kernel start address is correctly cast 2019-02-11 15:56:22 -08:00
s390x ppc patch queue 2019-02-19 2019-02-18 16:20:13 +00:00
scsi qdev: pass an Object * to qbus_set_hotplug_handler() 2019-02-17 21:54:02 +11:00
sd hw: sd: set category of the sd memory card 2019-01-30 10:24:20 +01:00
sh4 * cpu-exec fixes (Emilio, Laurent) 2019-02-05 19:39:22 +00:00
smbios hw/smbios: Move to the hw/firmware/ subdirectory 2018-12-19 16:48:16 -05:00
sparc qemu-sparc queue 2019-02-07 16:49:30 +00:00
sparc64 hw/sparc64: Explicitly set default_display = "std" 2019-02-14 11:46:30 +01:00
ssi aspeed/smc: snoop SPI transfers to fake dummy cycles 2019-01-29 11:46:05 +00:00
timer qapi: move RTC_CHANGE to the target schema 2019-02-18 14:44:05 +01:00
tpm tpm: clear RAM when "memory overwrite" requested 2019-01-17 21:10:57 -05:00
tricore hw/tricore/Makefile.objs: Create CONFIG_* for tricore 2019-02-05 16:50:21 +01:00
unicore32 hw/unicore32/puv3: Drop useless inclusion of "hw/i386/pc.h" 2019-02-06 15:54:12 +01:00
usb usb: remove unnecessary NULL device check from usb_ep_get() 2019-02-20 09:41:23 +01:00
vfio hw/vfio/Makefile.objs: Create new CONFIG_* variables for VFIO core and PCI 2019-02-05 16:50:21 +01:00
virtio virtio-net: make VirtIOFeature usable for other virtio devices 2019-02-22 09:42:16 +00:00
watchdog hw/watchdog/wdt_i6300esb: remove a unnecessary comment 2019-01-11 15:46:55 +01:00
xen xen: fix xen-bus state model to allow frontend re-connection 2019-02-04 11:04:49 +00:00
xenpv xen: Replace few mentions of xend by libxl 2019-01-14 13:45:40 +00:00
xtensa hw/xtensa/Makefile.objs: Build xtensa_sim and xtensa_fpga conditionally 2019-02-05 16:50:20 +01:00
Makefile.objs hw/vfio/Makefile.objs: Create new CONFIG_* variables for VFIO core and PCI 2019-02-05 16:50:21 +01:00