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a4c4d46272
qemu/hw
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Stefano Stabellini a4c4d46272 xen/9pfs: yield when there isn't enough room on the ring 
Instead of truncating replies, which is problematic, wait until the
client reads more data and frees bytes on the reply ring.

Do that by calling qemu_coroutine_yield(). The corresponding
qemu_coroutine_enter_if_inactive() is called from xen_9pfs_bh upon
receiving the next notification from the client.

We need to be careful to avoid races in case xen_9pfs_bh and the
coroutine are both active at the same time. In xen_9pfs_bh, wait until
either the critical section is over (ring->co == NULL) or until the
coroutine becomes inactive (qemu_coroutine_yield() was called) before
continuing. Then, simply wake up the coroutine if it is inactive.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <20200521192627.15259-2-sstabellini@kernel.org>
Signed-off-by: Greg Kurz <groug@kaod.org>
2020-05-25 11:45:39 +02:00
..
9pfs xen/9pfs: yield when there isn't enough room on the ring 2020-05-25 11:45:39 +02:00
acpi qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
adc hw/*/Makefile.objs: Move many .o files to common-objs 2020-02-04 09:00:57 +01:00
alpha hw/ide: Do ide_drive_get() within pci_ide_create_devs() 2020-03-17 12:22:36 -04:00
arm hw/arm/pxa2xx: Replace hw_error() by qemu_log_mask() 2020-05-21 22:05:27 +01:00
audio qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
block hw/block/pflash: Check return value of blk_pwrite() 2020-05-22 19:38:14 +02:00
char hw/char/xilinx_uartlite: Replace hw_error() by qemu_log_mask() 2020-05-21 22:05:27 +01:00
core various: Remove unnecessary OBJECT() cast 2020-05-15 07:08:14 +02:00
cpu qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
cris hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
display hw/arm/pxa2xx: Replace hw_error() by qemu_log_mask() 2020-05-21 22:05:27 +01:00
dma hw/arm/pxa2xx: Replace hw_error() by qemu_log_mask() 2020-05-21 22:05:27 +01:00
gpio ARM: PL061: Introduce N_GPIOS 2020-05-21 22:05:27 +01:00
hppa hw/ide: Remove unneeded inclusion of hw/ide.h 2020-03-17 12:22:36 -04:00
hyperv qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
i2c hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
i386 hw: Use QEMU_IS_ALIGNED() on parallel flash block size 2020-05-18 19:05:25 +02:00
ide hw/ide/ahci: Log lost IRQs 2020-05-18 19:05:25 +02:00
input qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
intc qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
ipack qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
ipmi various: Remove unnecessary OBJECT() cast 2020-05-15 07:08:14 +02:00
isa Drop more @errp parameters after previous commit 2020-05-15 07:08:14 +02:00
lm32 hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
m68k hw/m68k: Use memory_region_init_rom() with read-only regions 2020-03-17 15:18:47 +01:00
mem qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
microblaze various: Remove unnecessary OBJECT() cast 2020-05-15 07:08:14 +02:00
mips smbus: Fix spd_data_generate() error API violation 2020-04-29 08:01:52 +02:00
misc hw: Move i.MX watchdog driver to hw/watchdog 2020-05-21 20:00:18 +01:00
moxie hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
net hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
nios2 qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
nubus hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
nvram qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
openrisc hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
pci qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
pci-bridge pcie_root_port: Add hotplug disabling option 2020-03-08 09:18:29 -04:00
pci-host hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
pcmcia qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
ppc hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
rdma lockable: Replace locks with lock guard macros 2020-05-04 16:07:43 +01:00
riscv hw: Use QEMU_IS_ALIGNED() on parallel flash block size 2020-05-18 19:05:25 +02:00
rtc qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
s390x various: Remove unnecessary OBJECT() cast 2020-05-15 07:08:14 +02:00
scsi qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
sd qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
semihosting semihosting: add qemu_semihosting_console_inc for SYS_READC 2020-01-09 11:41:29 +00:00
sh4 hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
smbios hw/smbios/smbios: Remove unused include 2020-02-06 10:38:57 +01:00
sparc qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
sparc64 qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
ssi qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
timer hw/timer/exynos4210_mct: Replace hw_error() by qemu_log_mask() 2020-05-21 22:05:27 +01:00
tpm hw/tpm: fix usage of bool in tpm-tis.c 2020-05-12 11:47:24 -04:00
tricore hw: Do not initialize MachineClass::is_default to 0 2020-02-28 14:57:19 -05:00
unicore32 hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
usb qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
vfio Revert "hw/display/ramfb: initialize fw-config space with xres/ yres" 2020-05-18 15:42:34 +02:00
virtio qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
watchdog hw/watchdog: Implement full i.MX watchdog support 2020-05-21 20:00:18 +01:00
xen hw: Remove unnecessary DEVICE() cast 2020-05-15 07:08:52 +02:00
xenpv trivial: Remove xenfb_enabled from sysemu.h 2020-02-04 09:00:57 +01:00
xtensa hw/xtensa/xtfpga:fix leak of fdevice tree blob 2020-02-19 10:33:38 +01:00
Kconfig Remove the core bluetooth code 2019-12-17 09:01:14 +01:00
Makefile.objs Remove the core bluetooth code 2019-12-17 09:01:14 +01:00