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qemu/hw
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Evgeny Yakovlev 5f2585772f virtio-blk: advertise F_WCE (F_FLUSH) if F_CONFIG_WCE is advertised 
Virtio spec 1.1 (and earlier), 5.2.5.2 Driver Requirements: Device
Initialization:

"Devices SHOULD always offer VIRTIO_BLK_F_FLUSH, and MUST offer it if
they offer VIRTIO_BLK_F_CONFIG_WCE"

Currently F_CONFIG_WCE and F_WCE are not connected to each other.
Qemu will advertise F_CONFIG_WCE if config-wce argument is
set for virtio-blk device. And F_WCE is advertised only if
underlying block backend actually has it's caching enabled.

Fix this by advertising F_WCE if F_CONFIG_WCE is also advertised.

To preserve backwards compatibility with newer machine types make this
behaviour governed by "x-enable-wce-if-config-wce" virtio-blk-device
property and introduce hw_compat_4_2 with new property being off by
default for all machine types <= 4.2 (but don't introduce 4.3
machine type itself yet).

Signed-off-by: Evgeny Yakovlev <wrfsh@yandex-team.ru>
Message-Id: <1572978137-189218-1-git-send-email-wrfsh@yandex-team.ru>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2019-12-13 11:22:06 +00:00
..
9pfs 9pfs: Fix divide by zero bug 2019-11-23 15:51:48 +01:00
acpi hw/pci-host/piix: Move i440FX declarations to hw/pci-host/i440fx.h 2019-11-05 23:33:12 +01:00
adc
alpha hw: Move MC146818 device from hw/timer/ to hw/rtc/ subdirectory 2019-10-24 20:13:10 +02:00
arm virtio-blk: advertise F_WCE (F_FLUSH) if F_CONFIG_WCE is advertised 2019-12-13 11:22:06 +00:00
audio
block virtio-blk: advertise F_WCE (F_FLUSH) if F_CONFIG_WCE is advertised 2019-12-13 11:22:06 +00:00
bt
char virtio: basic packed virtqueue support 2019-10-25 07:46:22 -04:00
core virtio-blk: advertise F_WCE (F_FLUSH) if F_CONFIG_WCE is advertised 2019-12-13 11:22:06 +00:00
cpu
cris
display display: xlnx_dp: Provide sufficient bytes for silent audio channel 2019-11-21 07:12:28 +01:00
dma hw/dma/xilinx_axidma.c: Switch to transaction-based ptimer API 2019-10-24 17:16:29 +01:00
gpio hw/gpio: Fix property accessors of the AST2600 GPIO 1.8V model 2019-10-24 17:16:27 +01:00
hppa hw: Move MC146818 device from hw/timer/ to hw/rtc/ subdirectory 2019-10-24 20:13:10 +02:00
hyperv
i2c aspeed/i2c: Add AST2600 support 2019-10-15 18:09:04 +01:00
i386 virtio-blk: advertise F_WCE (F_FLUSH) if F_CONFIG_WCE is advertised 2019-12-13 11:22:06 +00:00
ide bootdevice: Gather LCHS from all relevant devices 2019-10-31 11:47:29 -04:00
input virtio-input: fix memory leak on unrealize 2019-11-25 03:19:36 -05:00
intc ppc patch queue 2019-11-15 2019-11-18 11:09:06 +00:00
ipack
ipmi
isa hw/pci-host/piix: Extract PIIX3 functions to hw/isa/piix3.c 2019-11-05 23:33:12 +01:00
lm32
m68k q800: fix I/O memory map 2019-11-05 18:52:29 +01:00
mem memory-device: simplify Makefile.objs conditions 2019-10-22 09:38:42 +02:00
microblaze
mips hw/mips/gt64xxx: Remove dynamic field width from trace events 2019-11-19 14:46:01 +01:00
misc mos6522: update counters when timer interrupts are off 2019-11-26 10:11:50 +11:00
moxie
net net/virtio: Fix failover error handling crash bugs 2019-12-02 16:14:38 +01:00
nios2
nubus hw/m68k: add Nubus support 2019-10-28 19:06:47 +01:00
nvram Fix the fw_cfg reboot-timeout=-1 special value, add a test for it. 2019-11-05 20:17:11 +00:00
openrisc
pci pci: Use PCI aliases when determining device IOMMU address space 2019-11-05 04:04:21 -05:00
pci-bridge
pci-host hw/pci-host/i440fx: Remove the last PIIX3 traces 2019-11-05 23:33:12 +01:00
pcmcia
ppc virtio-blk: advertise F_WCE (F_FLUSH) if F_CONFIG_WCE is advertised 2019-12-13 11:22:06 +00:00
rdma hw/rdma: Utilize ibv_reg_mr_iova for memory registration 2019-11-06 12:49:04 +02:00
riscv hw/riscv: Add optional symbol callback ptr to riscv_load_kernel() 2019-11-25 12:34:52 -08:00
rtc * microvm docs and fixes (Sergio, Liam) 2019-11-19 16:31:27 +00:00
s390x virtio-blk: advertise F_WCE (F_FLUSH) if F_CONFIG_WCE is advertised 2019-12-13 11:22:06 +00:00
scsi scsi: deprecate scsi-disk 2019-11-19 10:01:34 +01:00
sd hw/sd/sdhci: Add dummy Samsung SDHCI controller 2019-10-22 17:44:00 +01:00
semihosting
sh4
smbios
sparc hw: Move M48T59 device from hw/timer/ to hw/rtc/ subdirectory 2019-10-24 20:20:45 +02:00
sparc64 hw: Move sun4v hypervisor RTC from hw/timer/ to hw/rtc/ subdirectory 2019-10-24 20:23:15 +02:00
ssi ssi: xilinx_spips: Skip spi bus update for a few register writes 2019-11-19 13:20:27 +00:00
timer hw/i386: Remove obsolete LoadStateHandler::load_state_old handlers 2019-11-05 23:33:12 +01:00
tpm
tricore
unicore32
usb usb-host: add option to allow all resets. 2019-11-06 13:26:04 +01:00
vfio vfio/pci: Respond to KVM irqchip change notifier 2019-11-26 10:11:30 +11:00
virtio virtio: notify virtqueue via host notifier when available 2019-11-06 06:35:00 -05:00
watchdog hw: wdt_aspeed: Add AST2600 support 2019-10-15 18:09:04 +01:00
xen
xenpv
xtensa hw/xtensa: add virt machine 2019-10-18 20:38:10 -07:00
Kconfig Add Macintosh Quadra 800 machine in hw/m68k 2019-10-29 16:27:48 +00:00
Makefile.objs Add Macintosh Quadra 800 machine in hw/m68k 2019-10-29 16:27:48 +00:00