OpenE2K/qemu-e2k
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qemu-e2k/hw
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Anthony PERARD 705be57094 xen-bus: Avoid rewriting identical values to xenstore 
When QEMU receives a xenstore watch event suggesting that the "state"
of the frontend changed, it records this in its own state but it also
re-write the value back into xenstore even so there were no change.
This triggers an unnecessary xenstore watch event which QEMU will
process again (and maybe the frontend as well). Also QEMU could
potentially write an already old value.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Message-Id: <20190823101534.465-3-anthony.perard@citrix.com>
2019-08-27 14:18:28 +01:00
..
9pfs 9p: simplify source file selection 2019-08-20 17:26:19 +02:00
acpi hw/core: Move cpu.c, cpu.h from qom/ to hw/core/ 2019-08-21 13:24:01 +02:00
adc Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
alpha Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
arm Monitor patches for 2019-08-21 2019-08-22 10:31:21 +01:00
audio audio: remove audio_MIN, audio_MAX 2019-08-21 09:13:37 +02:00
block Block layer patches: 2019-08-16 16:43:46 +01:00
bt Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
char spapr: Implement better workaround in spapr-vty device 2019-08-21 17:17:39 +10:00
core Monitor patches for 2019-08-21 2019-08-22 10:31:21 +01:00
cpu hw/core: Move cpu.c, cpu.h from qom/ to hw/core/ 2019-08-21 13:24:01 +02:00
cris Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
display vga: a collection of ati fixes/improvements. 2019-08-22 16:13:17 +01:00
dma hw/dma/omap_dma: Move switch 'fall through' comment to correct place 2019-08-21 10:55:23 +02:00
gpio Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
hppa Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
hyperv Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
i2c Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
i386 xen: cleanup IOREQ server on exit 2019-08-27 14:18:28 +01:00
ide hw/ide/atapi: Use the ldst API 2019-08-16 19:14:04 -04:00
input sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
intc Monitor patches for 2019-08-21 2019-08-22 10:31:21 +01:00
ipack Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
ipmi hw/ipmi: Rewrite a fall through comment 2019-08-21 10:56:19 +02:00
isa hw/core: Move cpu.c, cpu.h from qom/ to hw/core/ 2019-08-21 13:24:01 +02:00
lm32 Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
m68k Include qemu/main-loop.h less 2019-08-16 13:31:52 +02:00
mem numa: Move remaining NUMA declarations from sysemu.h to numa.h 2019-08-16 13:31:53 +02:00
microblaze hw/misc: Add a config switch for the "unimplemented" device 2019-08-20 09:11:17 +02:00
mips target/mips: Style improvements in mips_mipssim.c 2019-08-19 19:53:37 +02:00
misc hw/core: Move cpu.c, cpu.h from qom/ to hw/core/ 2019-08-21 13:24:01 +02:00
moxie Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
net hw/net/e1000: Fix erroneous comment 2019-08-21 10:42:10 +02:00
nios2 Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
nvram sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
openrisc Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
pci Include sysemu/sysemu.h a lot less 2019-08-16 13:31:53 +02:00
pci-bridge Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
pci-host hw/core: Add a config switch for the "or-irq" device 2019-08-20 09:11:17 +02:00
pcmcia Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
ppc Monitor patches for 2019-08-21 2019-08-22 10:31:21 +01:00
rdma sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
riscv Include sysemu/sysemu.h a lot less 2019-08-16 13:31:53 +02:00
s390x hw: add compat machines for 4.2 2019-08-21 11:32:11 +10:00
scsi vhost-user-scsi: prevent using uninitialized vqs 2019-08-22 16:52:23 +01:00
sd Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
semihosting Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
sh4 sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
smbios Clean up inclusion of exec/cpu-common.h 2019-08-16 13:31:52 +02:00
sparc sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
sparc64 hw/misc: Add a config switch for the "unimplemented" device 2019-08-20 09:11:17 +02:00
ssi Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
timer Monitor patches for 2019-08-21 2019-08-22 10:31:21 +01:00
tpm Include hw/qdev-properties.h less 2019-08-16 13:31:53 +02:00
tricore Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
unicore32 Include hw/irq.h a lot less 2019-08-16 13:31:52 +02:00
usb usb: bugfixes and minor improvements. 2019-08-22 15:10:51 +01:00
vfio sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
virtio sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
watchdog sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
xen xen-bus: Avoid rewriting identical values to xenstore 2019-08-27 14:18:28 +01:00
xenpv Include sysemu/sysemu.h a lot less 2019-08-16 13:31:53 +02:00
xtensa sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
Kconfig hw/core: Add a config switch for the "register" device 2019-08-20 09:11:05 +02:00
Makefile.objs Makefile: do not repeat $(CONFIG_SOFTMMU) in hw/Makefile.objs 2019-07-15 20:58:37 +02:00