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bd688fc931
qemu/hw
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Emanuele Giuseppe Esposito bd688fc931 accel: introduce accelerator blocker API 
This API allows the accelerators to prevent vcpus from issuing
new ioctls while execting a critical section marked with the
accel_ioctl_inhibit_begin/end functions.

Note that all functions submitting ioctls must mark where the
ioctl is being called with accel_{cpu_}ioctl_begin/end().

This API requires the caller to always hold the BQL.
API documentation is in sysemu/accel-blocker.h

Internally, it uses a QemuLockCnt together with a per-CPU QemuLockCnt
(to minimize cache line bouncing) to keep avoid that new ioctls
run when the critical section starts, and a QemuEvent to wait
that all running ioctls finish.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221111154758.1372674-2-eesposit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-01-11 09:59:39 +01:00
..
9pfs error handling: Use RETRY_ON_EINTR() macro where applicable 2023-01-09 13:50:47 +01:00
acpi acpi: cpuhp: fix guest-visible maximum access size to the legacy reg block 2023-01-08 01:54:23 -05:00
adc
alpha include/hw/pci: Break inclusion loop pci_bridge.h and cxl.h 2023-01-08 01:54:22 -05:00
arm i.MX7D: Connect IRQs to GPIO devices. 2023-01-05 15:04:17 +00:00
audio include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
avr
block hw/virtio: generalise CHR_EVENT_CLOSED handling 2022-12-01 02:30:13 -05:00
char include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
core accel: introduce accelerator blocker API 2023-01-11 09:59:39 +01:00
cpu
cris
cxl hw/cxl/cdat: CXL CDAT Data Object Exchange implementation 2022-11-07 13:12:19 -05:00
display include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
dma treewide: Remove the unnecessary space before semicolon 2022-10-24 13:41:10 +02:00
gpio hw/gpio/meson: Introduce dedicated config switch for hw/gpio/mpc8xxx 2022-10-17 16:15:09 -03:00
hppa hw: Remove unused MAX_IDE_BUS define 2022-10-31 11:32:07 +01:00
hyperv hw/hyperv/vmbus: Use device_cold_reset() and bus_cold_reset() 2022-12-16 15:55:32 +00:00
i2c hw/acpi/Kconfig: Rename ACPI_X86_ICH to ACPI_ICH9 2023-01-08 01:54:21 -05:00
i386 virtio,pc,pci: features, cleanups, fixes 2023-01-09 10:07:12 +00:00
ide virtio,pc,pci: features, cleanups, fixes 2023-01-09 10:07:12 +00:00
input hw/input/tsc2xxx: Constify set_transform()'s MouseTransformInfo arg 2023-01-05 14:11:15 +00:00
intc pull-loongarch-20230106 2023-01-07 14:25:38 +00:00
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 include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
loongarch hw/intc/loongarch_pch: Change default irq number of pch irq controller 2023-01-06 14:12:43 +08:00
m68k hw: Add compat machines for 8.0 2022-12-21 06:35:28 -05:00
mem hw/cxl/device: Add Flex Bus Port DVSEC 2022-12-21 07:32:24 -05:00
microblaze hw/microblaze: pass random seed to fdt 2022-09-21 19:59:56 +02:00
mips include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
misc include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
net include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
nios2 hw/nios2: set machine->fdt in nios2_load_dtb() 2022-10-17 16:15:10 -03:00
nubus
nvme include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
nvram qapi machine: Elide redundant has_FOO in generated C 2022-12-14 20:04:47 +01:00
openrisc openrisc: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
pci include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
pci-bridge include/hw/cxl: Move typedef PXBDev to cxl.h, and put it to use 2023-01-08 01:54:22 -05:00
pci-host include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
pcmcia
ppc include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
rdma include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
remote Replace use of qdev_reset_all() with device_cold_reset() 2022-12-16 15:55:32 +00:00
riscv hw/riscv: opentitan: Drop "hartid-base" and "priority-base" initialization 2023-01-06 10:42:55 +10:00
rtc goldfish_rtc: Add big-endian property 2022-09-04 07:02:56 +01:00
rx rx: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
s390x * s390x header clean-ups from Philippe 2023-01-09 15:54:31 +00:00
scsi vhost-scsi: fix memleak of vsc->inflight 2023-01-08 01:54:23 -05:00
sd hw/sd/sdhci: Support big endian SD host controller interfaces 2022-12-21 14:17:55 -03:00
sensor
sh4
smbios include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
sparc
sparc64 hw: Remove unused MAX_IDE_BUS define 2022-10-31 11:32:07 +01:00
ssi aspeed/smc: Cache AspeedSMCClass 2022-10-24 11:20:15 +02:00
timer i.MX6UL: Add a specific GPT timer instance for the i.MX6UL 2023-01-05 15:02:08 +00:00
tpm tpm_crb: Avoid backend startup just before shutdown under Xen 2022-09-09 17:55:59 -04:00
tricore
usb include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
vfio include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
virtio virtio-pci: fix proxy->vector_irqfd leak in virtio_pci_set_guest_notifiers 2023-01-08 01:54:23 -05:00
watchdog include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
xen include/hw/pci: Break inclusion loop pci_bridge.h and cxl.h 2023-01-08 01:54:22 -05:00
xenpv
xtensa
Kconfig
meson.build