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Stefan Hajnoczi d3f6f294ae virtio-blk: always set ioeventfd during startup 
When starting ioeventfd it is common practice to set the event notifier
so that the ioeventfd handler is triggered to run immediately. There may
be no requests waiting to be processed, but the idea is that if a
request snuck in then we guarantee that it will be detected.

One scenario where self-triggering the ioeventfd is necessary is when
virtio_blk_handle_output() is called from a vCPU thread before the
VIRTIO Device Status transitions to DRIVER_OK. In that case we need to
self-trigger the ioeventfd so that the kick handled by the vCPU thread
causes the vq AioContext thread to take over handling the request(s).

Fixes: b6948ab01d ("virtio-blk: add iothread-vq-mapping parameter")
Reported-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20240119135748.270944-7-stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
 		2024-01-26 11:16:58 +01:00
..
9pfs * configure: use a native non-cross compiler for linux-user 2024-01-04 19:55:20 +00:00
acpi * configure: use a native non-cross compiler for linux-user 2024-01-04 19:55:20 +00:00
adc hw/adc: Constify VMState 2023-12-29 11:17:30 +11:00
alpha hw/pci: modify pci_setup_iommu() to set PCIIOMMUOps 2023-11-03 09:20:31 +01:00
arm hw/arm/virt: Consolidate valid CPU types 2024-01-18 12:20:33 +00:00
audio hw/audio/sb16: Do not migrate qdev properties 2024-01-05 16:20:15 +01:00
avr hw/avr/atmega: Fix wrong initial value of stack pointer 2023-11-28 14:27:12 +01:00
block virtio-blk: always set ioeventfd during startup 2024-01-26 11:16:58 +01:00
char hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
core hw/core/cpu: Rename cpu_class_init() to include 'common' 2024-01-19 12:28:59 +01:00
cpu hw/cpu/cluster: Cleanup unused included header in cluster.c 2024-01-05 16:20:15 +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 meson: remove CONFIG_ALL 2023-12-31 09:11:28 +01:00
display vga: sort-of implement word and double-word access modes 2024-01-18 10:43:14 +01:00
dma hw/dma: Constify VMState 2023-12-29 11:17:30 +11:00
gpio hw/gpio: Constify VMState 2023-12-29 11:17:30 +11:00
hppa hw/hppa: Move software power button address back into PDC 2024-01-13 06:48:14 +01:00
hyperv hw/hyperv: Constify VMState 2023-12-29 11:17:30 +11:00
i2c hw/i2c: Constify VMState 2023-12-29 11:17:30 +11:00
i386 - Fix s390x ISM reset 2024-01-20 17:22:16 +00:00
ide hw/ide: Constify VMState 2023-12-29 11:17:30 +11:00
input hw/input: Constify VMState 2023-12-29 11:17:30 +11:00
intc pull-loongarch-20240111 2024-01-11 15:19:14 +00:00
ipack hw/ipack: Constify VMState 2023-12-29 11:17:30 +11:00
ipmi hw/ipmi: Constify VMState 2023-12-29 11:17:30 +11:00
isa hw/isa: Constify VMState 2023-12-29 11:17:30 +11:00
loongarch hw/intc/loongarch_extioi: Add dynamic cpu number support 2024-01-11 19:22:47 +08:00
m68k q800: move dp8393x_prom memory region to Q800MachineState 2024-01-11 11:39:26 +01:00
mem meson: remove CONFIG_ALL 2023-12-31 09:11:28 +01:00
microblaze hw/microblaze: Clean up local variable shadowing 2023-09-29 10:07:16 +02:00
mips qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD 2024-01-08 10:45:43 -05:00
misc hw/misc: Implement STM32L4x5 SYSCFG 2024-01-15 17:12:22 +00:00
net system/cpus: rename qemu_mutex_lock_iothread() to bql_lock() 2024-01-08 10:45:43 -05:00
nios2 target/nios2: Deprecate the Nios II architecture 2023-11-23 14:10:04 +00:00
nubus trace-events: Fix the name of the tracing.rst file 2023-09-08 13:08:51 +03:00
nvme hw/nvme: Clean up local variable shadowing in nvme_ns_init() 2023-09-29 10:07:20 +02:00
nvram hw/arm/virt-acpi-build.c: Migrate fw_cfg creation to common location 2024-01-10 18:47:46 +10:00
openrisc hw/openrisc: Constify VMState 2023-12-30 07:38:06 +11:00
pci * configure: use a native non-cross compiler for linux-user 2024-01-04 19:55:20 +00:00
pci-bridge * configure: use a native non-cross compiler for linux-user 2024-01-04 19:55:20 +00:00
pci-host target/hppa qemu v8.2 regression fixes 2024-01-16 14:24:42 +00:00
pcmcia hw/pcmcia/pxa2xx: Inline pxa2xx_pcmcia_init() 2023-10-27 12:48:57 +01:00
ppc qemu/main-loop: rename qemu_cond_wait_iothread() to qemu_cond_wait_bql() 2024-01-08 10:45:43 -05:00
rdma hw/rdma/vmw/pvrdma_cmd: Use correct struct in query_port() 2023-10-21 15:00:22 +03:00
remote Replace "iothread lock" with "BQL" in comments 2024-01-08 10:45:43 -05:00
riscv target/riscv: add zicbop extension flag 2024-01-10 18:47:47 +10:00
rtc hw/rtc: Constify VMState 2023-12-30 07:38:06 +11:00
rx hw/rx/rx62n: Use qdev_prop_set_array() 2023-11-10 18:19:13 +01:00
s390x - Fix s390x ISM reset 2024-01-20 17:22:16 +00:00
scsi hw/scsi/esp-pci: set DMA_STAT_BCMBLT when BLAST command issued 2024-01-19 12:28:59 +01:00
sd hw/sd: Constify VMState 2023-12-30 07:38:06 +11:00
sensor hw/sensor: Constify VMState 2023-12-30 07:38:06 +11:00
sh4 target/sh4: Deprecate the shix machine 2024-01-19 12:28:59 +01:00
smbios meson: remove CONFIG_ALL 2023-12-31 09:11:28 +01:00
sparc target/sparc: Simplify qemu_irq_ack 2024-01-05 16:20:15 +01:00
sparc64 hw/sparc: Simplify memory_region_init_ram_nomigrate() calls 2024-01-05 16:20:15 +01:00
ssi hw/ssi: Constify VMState 2023-12-30 07:38:06 +11:00
timer hw/timer/hpet: Convert DPRINTF to trace events 2024-01-19 12:28:10 +01:00
tpm hw/tpm: Constify VMState 2023-12-30 07:38:06 +11:00
tricore hw/tricore: Log failing test in testdevice 2023-09-29 08:28:02 +02:00
ufs hw/ufs: avoid generating the same ID string for different LU devices 2023-12-05 13:57:18 +09:00
usb migration 1st pull for 9.0 2024-01-05 13:35:25 +00:00
vfio remove unnecessary casts from uintptr_t 2024-01-18 10:43:51 +01:00
virtio hw/arm/virt-acpi-build.c: Migrate virtio creation to common location 2024-01-10 18:47:46 +10:00
watchdog hw/watchdog: Constify VMState 2023-12-30 07:38:06 +11:00
xen cpus: check running not RUN_STATE_RUNNING 2024-01-04 09:52:42 +08:00
xenpv hw/xen: update Xen PV NIC to XenDevice model 2023-11-07 08:54:20 +00:00
xtensa trivial: Simplify the spots that use TARGET_BIG_ENDIAN as a numeric value 2023-09-08 13:08:52 +03:00
Kconfig hw/ufs: Initial commit for emulated Universal-Flash-Storage 2023-09-07 14:01:29 -04:00
meson.build hw/ufs: Initial commit for emulated Universal-Flash-Storage 2023-09-07 14:01:29 -04:00