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Stefan Hajnoczi bd58ab40c3 virtio: make it possible to detach host notifier from any thread 
virtio_queue_aio_detach_host_notifier() does two things:
1. It removes the fd handler from the event loop.
2. It processes the virtqueue one last time.

The first step can be peformed by any thread and without taking the
AioContext lock.

The second step may need the AioContext lock (depending on the device
implementation) and runs in the thread where request processing takes
place. virtio-blk and virtio-scsi therefore call
virtio_queue_aio_detach_host_notifier() from a BH that is scheduled in
AioContext.

The next patch will introduce a .drained_begin() function that needs to
call virtio_queue_aio_detach_host_notifier(). .drained_begin() functions
cannot call aio_poll() to wait synchronously for the BH. It is possible
for a .drained_poll() callback to asynchronously wait for the BH, but
that is more complex than necessary here.

Move the virtqueue processing out to the callers of
virtio_queue_aio_detach_host_notifier() so that the function can be
called from any thread. This is in preparation for the next patch.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230516190238.8401-17-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
 		2023-05-30 17:32:02 +02:00
..
9pfs 9pfs/xen: Fix segfault on shutdown 2023-05-16 16:21:54 +02:00
acpi hw/pci-bridge: Make PCIe and CXL PXB Devices inherit from TYPE_PXB_DEV 2023-04-24 22:56:55 -04:00
adc hw/adc: Make adci[*] R/W in NPCM7XX ADC 2022-07-18 13:20:14 +01:00
alpha hw/alpha: Use MachineClass->default_nic in the alpha machine 2023-05-26 09:10:49 +02:00
arm hw/arm: Use MachineClass->default_nic in the sbsa-ref machine 2023-05-26 09:10:49 +02:00
audio hw/audio/via-ac97: Basic implementation of audio playback 2023-03-08 00:37:48 +01:00
avr Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
block virtio: make it possible to detach host notifier from any thread 2023-05-30 17:32:02 +02:00
char hw/char/parallel: Move TYPE_ISA_PARALLEL to the header file 2023-05-22 09:44:48 +02:00
core machine: do not crash if default RAM backend name has been stolen 2023-05-26 09:37:04 +02:00
cpu hw/cpu: Mark arm11 and realview mpcore as target-independent code 2023-01-16 17:51:20 +01:00
cris Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
cxl hw/cxl: Introduce cxl_device_get_timestamp() utility function 2023-05-19 10:30:46 -04:00
display virtio-gpu: add a FIXME for virtio_gpu_load() 2023-05-28 13:08:25 +04:00
dma replace TABs with spaces 2023-03-20 12:43:50 +01:00
gpio replace TABs with spaces 2023-03-20 12:43:50 +01:00
hppa hw/hppa: Use MachineClass->default_nic in the hppa machine 2023-05-26 09:10:49 +02:00
hyperv win32: replace closesocket() with close() wrapper 2023-03-13 15:39:31 +04:00
i2c hw/i2c/allwinner-i2c: Fix subclassing of TYPE_AW_I2C_SUN6I 2023-04-11 14:13:29 +01:00
i386 hw/xen: do not use aio_set_fd_handler(is_external=true) in xen_xenstore 2023-05-30 17:32:02 +02:00
ide hw: replace most qemu_bh_new calls with qemu_bh_new_guarded 2023-04-28 11:31:54 +02:00
input virtio-input: add a virtio-mulitouch device 2023-05-28 13:08:25 +04:00
intc hw/intc: Add NULL pointer check on LoongArch ipi device 2023-05-15 19:09:33 +08:00
ipack include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
ipmi include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
isa hw/char/parallel: Move TYPE_ISA_PARALLEL to the header file 2023-05-22 09:44:48 +02:00
loongarch hw/loongarch64: Use MachineClass->default_nic in the virt machine 2023-05-26 09:10:49 +02:00
m68k hw: Add compat machines for 8.1 2023-04-21 04:25:52 -04:00
mem hw/cxl: Multi-Region CXL Type-3 Devices (Volatile and Persistent) 2023-05-19 01:36:09 -04:00
microblaze hw/char/xilinx_uartlite: Open-code xilinx_uartlite_create() 2023-02-27 13:27:05 +00:00
mips hw/mips: Use MachineClass->default_nic in the virt machine 2023-05-26 09:10:49 +02:00
misc hw/arm/bcm2835_property: Implement "get command line" message 2023-05-02 15:47:40 +01:00
net rtl8139: fix large_send_mss divide-by-zero 2023-05-23 15:20:15 +08:00
nios2 hw/nios2: set machine->fdt in nios2_load_dtb() 2022-10-17 16:15:10 -03:00
nubus hw/nubus/nubus-device: Fix memory leak in nubus_device_realize 2023-02-27 22:29:01 +01:00
nvme hw: replace most qemu_bh_new calls with qemu_bh_new_guarded 2023-04-28 11:31:54 +02:00
nvram aspeed queue: 2023-03-03 17:11:22 +00:00
openrisc *: Add missing includes of qemu/error-report.h 2023-03-22 15:06:57 +00:00
pci hw/pci: Disable PCI_ERR_UNCOR_MASK register for machine type < 8.0 2023-05-19 10:30:46 -04:00
pci-bridge hw/pci-bridge: make building pcie-to-pci bridge configurable 2023-05-19 10:30:46 -04:00
pci-host hw/pci-host/pam: Make init_pam() usage more readable 2023-05-19 10:30:46 -04:00
pcmcia hw/pcmcia: Do not register PCMCIA type if not required 2021-05-02 17:24:50 +02:00
ppc ppc/pegasos2: Change default CPU to 7457 2023-05-28 13:25:45 -03:00
rdma hw/rdma: VMW_PVRDMA should depend on VMXNET3_PCI 2023-04-28 08:05:37 +02:00
remote Drop duplicate #include 2023-02-08 07:28:05 +01:00
riscv hw/riscv: Add signature dump function for spike to run ACT tests 2023-05-05 10:49:50 +10:00
rtc replace TABs with spaces 2023-03-20 12:43:50 +01:00
rx rx: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
s390x hw/s390x: Use MachineClass->default_nic in the s390x machine 2023-05-22 09:44:48 +02:00
scsi virtio: make it possible to detach host notifier from any thread 2023-05-30 17:32:02 +02:00
sd hw/sd/allwinner-sdhost: Correctly byteswap descriptor fields 2023-05-02 15:47:41 +01:00
sensor Do not include hw/hw.h if it is not necessary 2023-02-27 09:15:38 +01:00
sh4 hw/sh4: Use MachineClass->default_nic in the sh4 r2d machine 2023-05-22 09:44:48 +02:00
smbios hw/smbios: fix field corruption in type 4 table 2023-03-02 03:10:46 -05:00
sparc machine: make memory-backend a link property 2022-05-12 12:29:44 +02:00
sparc64 hw/sparc64/sun4u: Use MachineClass->default_nic and MachineClass->no_parallel 2023-05-22 09:44:48 +02:00
ssi hw/ssi: Fix Linux driver init issue with xilinx_spi 2023-04-03 16:12:30 +01:00
timer hw/timer/imx_epit: fix limit check 2023-04-20 10:21:14 +01:00
tpm tpm: Add support for TPM device over I2C bus 2023-04-20 08:17:15 -04:00
tricore hw/tricore: fix inclusion of tricore_testboard 2021-07-20 20:10:21 +02:00
usb usb/ohci: Set pad to 0 after frame update 2023-05-25 10:18:33 +02:00
vfio vfio/pci: Fix a use-after-free issue 2023-05-24 09:21:22 +02:00
virtio virtio: make it possible to detach host notifier from any thread 2023-05-30 17:32:02 +02:00
watchdog hw/watchdog: Allwinner WDT emulation for system reset 2023-04-20 10:21:13 +01:00
xen hw/xen: do not set is_external=true on evtchn fds 2023-05-30 17:32:02 +02:00
xenpv hw/xenpv: Initialize Xen backend operations 2023-03-24 14:52:14 +00:00
xtensa hw/xtensa: Use MachineClass->default_nic in the virt machine 2023-05-26 09:10:49 +02:00
Kconfig xen: add CONFIG_XEN_BUS and CONFIG_XEN_EMU options for Xen emulation 2023-03-01 08:22:49 +00:00
meson.build hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00