Merge tag 'single-binary-20250425' of https://github.com/philmd/qemu into staging

Various patches loosely related to single binary work:

- Replace cpu_list() definition by CPUClass::list_cpus() cal

Merge tag 'single-binary-20250425' of https://github.com/philmd/qemu into staging

Various patches loosely related to single binary work:

- Replace cpu_list() definition by CPUClass::list_cpus() callback
- Remove few MO_TE definitions on Hexagon / X86 targets
- Remove target_ulong uses in ARMMMUFaultInfo and ARM CPUWatchpoint
- Remove DEVICE_HOST_ENDIAN definition
- Evaluate TARGET_BIG_ENDIAN at compile time and use target_needs_bswap() more
- Rename target_words_bigendian() as target_big_endian()
- Convert target_name() and target_cpu_type() to TargetInfo API
- Constify QOM TypeInfo class_data/interfaces fields
- Get default_cpu_type calling machine_class_default_cpu_type()
- Correct various uses of GLibCompareDataFunc prototype
- Simplify ARM/Aarch64 gdb_get_core_xml_file() handling a bit
- Move device tree files in their own pc-bios/dtb/ subdir
- Correctly check strchrnul() symbol availability on macOS SDK
- Move target-agnostic methods out of cpu-target.c and accel-target.c
- Unmap canceled USB XHCI packet
- Use deposit/extract API in designware model
- Fix MIPS16e translation
- Few missing header fixes

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# gpg: Signature made Fri 25 Apr 2025 11:26:55 EDT
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE

* tag 'single-binary-20250425' of https://github.com/philmd/qemu: (58 commits)
qemu: Convert target_name() to TargetInfo API
accel: Move target-agnostic code from accel-target.c -> accel-common.c
accel: Make AccelCPUClass structure target-agnostic
accel: Include missing 'qemu/accel.h' header in accel-internal.h
accel: Implement accel_init_ops_interfaces() for both system/user mode
cpus: Move target-agnostic methods out of cpu-target.c
cpus: Replace CPU_RESOLVING_TYPE -> target_cpu_type()
qemu: Introduce target_cpu_type()
qapi: Rename TargetInfo structure as QemuTargetInfo
hw/microblaze: Evaluate TARGET_BIG_ENDIAN at compile time
hw/mips: Evaluate TARGET_BIG_ENDIAN at compile time
target/xtensa: Evaluate TARGET_BIG_ENDIAN at compile time
target/mips: Check CPU endianness at runtime using env_is_bigendian()
accel/kvm: Use target_needs_bswap()
linux-user/elfload: Use target_needs_bswap()
target/hexagon: Include missing 'accel/tcg/getpc.h'
accel/tcg: Correct list of included headers in tcg-stub.c
system/kvm: make functions accessible from common code
meson: Use osdep_prefix for strchrnul()
meson: Share common C source prefixes
...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

qom: Have class_init() take a const data argument

Mechanical change using gsed, then style manually adapted
to pass checkpatch.pl script.

Suggested-by: Richard Henderson <richard.henderson@linaro.o

qom: Have class_init() take a const data argument

Mechanical change using gsed, then style manually adapted
to pass checkpatch.pl script.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250424194905.82506-4-philmd@linaro.org>

show more ...

Merge tag 'exec-20241220' of https://github.com/philmd/qemu into staging

Accel & Exec patch queue

- Ignore writes to CNTP_CTL_EL0 on HVF ARM (Alexander)
- Add '-d invalid_mem' logging option (Zolta

Merge tag 'exec-20241220' of https://github.com/philmd/qemu into staging

Accel & Exec patch queue

- Ignore writes to CNTP_CTL_EL0 on HVF ARM (Alexander)
- Add '-d invalid_mem' logging option (Zoltan)
- Create QOM containers explicitly (Peter)
- Rename sysemu/ -> system/ (Philippe)
- Re-orderning of include/exec/ headers (Philippe)
Move a lot of declarations from these legacy mixed bag headers:
. "exec/cpu-all.h"
. "exec/cpu-common.h"
. "exec/cpu-defs.h"
. "exec/exec-all.h"
. "exec/translate-all"
to these more specific ones:
. "exec/page-protection.h"
. "exec/translation-block.h"
. "user/cpu_loop.h"
. "user/guest-host.h"
. "user/page-protection.h"

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# gpg: Signature made Fri 20 Dec 2024 11:45:20 EST
# gpg: using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD 6BB2 E3E3 2C2C DEAD C0DE

* tag 'exec-20241220' of https://github.com/philmd/qemu: (59 commits)
util/qemu-timer: fix indentation
meson: Do not define CONFIG_DEVICES on user emulation
system/accel-ops: Remove unnecessary 'exec/cpu-common.h' header
system/numa: Remove unnecessary 'exec/cpu-common.h' header
hw/xen: Remove unnecessary 'exec/cpu-common.h' header
target/mips: Drop left-over comment about Jazz machine
target/mips: Remove tswap() calls in semihosting uhi_fstat_cb()
target/xtensa: Remove tswap() calls in semihosting simcall() helper
accel/tcg: Un-inline translator_is_same_page()
accel/tcg: Include missing 'exec/translation-block.h' header
accel/tcg: Move tcg_cflags_has/set() to 'exec/translation-block.h'
accel/tcg: Restrict curr_cflags() declaration to 'internal-common.h'
qemu/coroutine: Include missing 'qemu/atomic.h' header
exec/translation-block: Include missing 'qemu/atomic.h' header
accel/tcg: Declare cpu_loop_exit_requested() in 'exec/cpu-common.h'
exec/cpu-all: Include 'cpu.h' earlier so MMU_USER_IDX is always defined
target/sparc: Move sparc_restore_state_to_opc() to cpu.c
target/sparc: Uninline cpu_get_tb_cpu_state()
target/loongarch: Declare loongarch_cpu_dump_state() locally
user: Move various declarations out of 'exec/exec-all.h'
...

Conflicts:
hw/char/riscv_htif.c
hw/intc/riscv_aplic.c
target/s390x/cpu.c

Apply sysemu header path changes to not in the pull request.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

include: Rename sysemu/ -> system/

Headers in include/sysemu/ are not only related to system
*emulation*, they are also used by virtualization. Rename
as system/ which is clearer.

Files renamed man

include: Rename sysemu/ -> system/

Headers in include/sysemu/ are not only related to system
*emulation*, they are also used by virtualization. Rename
as system/ which is clearer.

Files renamed manually then mechanical change using sed tool.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Lei Yang <leiyang@redhat.com>
Message-Id: <20241203172445.28576-1-philmd@linaro.org>

show more ...

Merge tag 'pull-trivial-patches' of https://gitlab.com/mjt0k/qemu into staging

trivial patches for 2024-02-13

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Merge tag 'pull-trivial-patches' of https://gitlab.com/mjt0k/qemu into staging

trivial patches for 2024-02-13

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# gpg: Signature made Tue 13 Feb 2024 08:01:12 GMT
# gpg: using RSA key 7B73BAD68BE7A2C289314B22701B4F6B1A693E59
# gpg: issuer "mjt@tls.msk.ru"
# gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>" [full]
# gpg: aka "Michael Tokarev <mjt@corpit.ru>" [full]
# gpg: aka "Michael Tokarev <mjt@debian.org>" [full]
# Primary key fingerprint: 6EE1 95D1 886E 8FFB 810D 4324 457C E0A0 8044 65C5
# Subkey fingerprint: 7B73 BAD6 8BE7 A2C2 8931 4B22 701B 4F6B 1A69 3E59

* tag 'pull-trivial-patches' of https://gitlab.com/mjt0k/qemu:
monitor/target: Include missing 'exec/memory.h' header
cpu-target: Include missing 'exec/memory.h' header
system: Move memory_ldst.c.inc to system
qemu-options.hx: Add zoom-to-fit to option summary for gtk
qemu-options.hx: document that tftp=dir is readonly
iothread: Simplify expression in qemu_in_iothread()
qemu-nbd: mention --tls-hostname option in qemu-nbd --help
MAINTAINERS: Cover qapi/stats.json
MAINTAINERS: Cover qapi/cxl.json
hw/smbios: Fix port connector option validation
hw/smbios: Fix OEM strings table option validation
hw/arm/smmuv3: Consolidate the use of device_class_set_parent_realize()
hw/intc/s390_flic: Consolidate the use of device_class_set_parent_realize()
hw/isa/pc87312: Consolidate the use of device_class_set_parent_realize()
hw/isa/vt82c686: Consolidate the use of device_class_set_parent_realize()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

iothread: Simplify expression in qemu_in_iothread()

'a == b ? false : true' is a rather convoluted way of writing 'a != b'.
Use the more obvious way to write it.

Signed-off-by: Kevin Wolf <kwolf@re

iothread: Simplify expression in qemu_in_iothread()

'a == b ? false : true' is a rather convoluted way of writing 'a != b'.
Use the more obvious way to write it.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

show more ...

Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

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Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

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# gpg: Signature made Mon 08 Jan 2024 16:37:25 GMT
# gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8

* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
Rename "QEMU global mutex" to "BQL" in comments and docs
Replace "iothread lock" with "BQL" in comments
qemu/main-loop: rename qemu_cond_wait_iothread() to qemu_cond_wait_bql()
qemu/main-loop: rename QEMU_IOTHREAD_LOCK_GUARD to BQL_LOCK_GUARD
system/cpus: rename qemu_mutex_lock_iothread() to bql_lock()
iothread: Remove unused Error** argument in aio_context_set_aio_params

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

iothread: Remove unused Error** argument in aio_context_set_aio_params

aio_context_set_aio_params() doesn't use its undocumented
Error** argument. Remove it to simplify.

Note this removes a use of

iothread: Remove unused Error** argument in aio_context_set_aio_params

aio_context_set_aio_params() doesn't use its undocumented
Error** argument. Remove it to simplify.

Note this removes a use of "unchecked Error**" in
iothread_set_aio_context_params().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20231120171806.19361-1-philmd@linaro.org>

show more ...

Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

- Jeuk Kim's emulated UFS device
- Fabiano Rosas' IOThread GSource "name" debugging aid

# -----BEGIN PG

Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

- Jeuk Kim's emulated UFS device
- Fabiano Rosas' IOThread GSource "name" debugging aid

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# gpg: Signature made Thu 07 Sep 2023 14:16:22 EDT
# gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [ultimate]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [ultimate]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8

* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
tests/qtest: Introduce tests for UFS
hw/ufs: Support for UFS logical unit
hw/ufs: Support for Query Transfer Requests
hw/ufs: Initial commit for emulated Universal-Flash-Storage
iothread: Set the GSource "name" field

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

iothread: Set the GSource "name" field

Having a name in the source helps with debugging core dumps when one
might not have access to TLS data to cross-reference AioContexts with
their addresses.

Si

iothread: Set the GSource "name" field

Having a name in the source helps with debugging core dumps when one
might not have access to TLS data to cross-reference AioContexts with
their addresses.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230905180359.14083-1-farosas@suse.de
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

Merge tag 'pull-target-arm-20230227' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
* Various code cleanups
* More refactoring working towards allowing a build

Merge tag 'pull-target-arm-20230227' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
* Various code cleanups
* More refactoring working towards allowing a build
without CONFIG_TCG

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# gpg: Signature made Mon 27 Feb 2023 13:59:09 GMT
# gpg: using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg: issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg: aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg: aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# gpg: aka "Peter Maydell <peter@archaic.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20230227' of https://git.linaro.org/people/pmaydell/qemu-arm: (25 commits)
hw: Replace qemu_or_irq typedef by OrIRQState
hw/or-irq: Declare QOM macros using OBJECT_DECLARE_SIMPLE_TYPE()
hw/irq: Declare QOM macros using OBJECT_DECLARE_SIMPLE_TYPE()
iothread: Remove unused IOThreadClass / IOTHREAD_CLASS
hw/arm/musicpal: Remove unused dummy MemoryRegion
hw/intc/armv7m_nvic: Use QOM cast CPU() macro
hw/timer/cmsdk-apb-timer: Remove unused 'qdev-properties.h' header
hw/char/cmsdk-apb-uart: Open-code cmsdk_apb_uart_create()
hw/char/xilinx_uartlite: Open-code xilinx_uartlite_create()
hw/char/xilinx_uartlite: Expose XILINX_UARTLITE QOM type
hw/char/pl011: Open-code pl011_luminary_create()
hw/char/pl011: Un-inline pl011_create()
hw/gpio/max7310: Simplify max7310_realize()
tests/avocado: add machine:none tag to version.py
cpu-defs.h: Expose CPUTLBEntryFull to non-TCG code
target/arm: Don't access TCG code when debugging with KVM
target/arm: Move regime_using_lpae_format into internal.h
target/arm: Move hflags code into the tcg directory
target/arm: Wrap arm_rebuild_hflags calls with tcg_enabled
target/arm: Move psci.c into the tcg directory
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

iothread: Remove unused IOThreadClass / IOTHREAD_CLASS

Since commit be8d853766 ("iothread: add I/O thread object") we
never used IOThreadClass / IOTHREAD_CLASS() / IOTHREAD_GET_CLASS(),
remove these

iothread: Remove unused IOThreadClass / IOTHREAD_CLASS

Since commit be8d853766 ("iothread: add I/O thread object") we
never used IOThreadClass / IOTHREAD_CLASS() / IOTHREAD_GET_CLASS(),
remove these definitions.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20230113200138.52869-2-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

Merge tag 'pull-misc-2022-12-14' of https://repo.or.cz/qemu/armbru into staging

Miscellaneous patches for 2022-12-14

# gpg: Signature made Wed 14 Dec 2022 15:23:02 GMT
# gpg: using R

Merge tag 'pull-misc-2022-12-14' of https://repo.or.cz/qemu/armbru into staging

Miscellaneous patches for 2022-12-14

# gpg: Signature made Wed 14 Dec 2022 15:23:02 GMT
# gpg: using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg: issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653

* tag 'pull-misc-2022-12-14' of https://repo.or.cz/qemu/armbru:
ppc4xx_sdram: Simplify sdram_ddr_size() to return
block/vmdk: Simplify vmdk_co_create() to return directly
cleanup: Tweak and re-run return_directly.cocci
io: Tidy up fat-fingered parameter name
qapi: Use returned bool to check for failure (again)
sockets: Use ERRP_GUARD() where obviously appropriate
qemu-config: Use ERRP_GUARD() where obviously appropriate
qemu-config: Make config_parse_qdict() return bool
monitor: Use ERRP_GUARD() in monitor_init()
monitor: Simplify monitor_fd_param()'s error handling
error: Move ERRP_GUARD() to the beginning of the function
error: Drop a few superfluous ERRP_GUARD()
error: Drop some obviously superfluous error_propagate()
Drop more useless casts from void * to pointer

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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error: Move ERRP_GUARD() to the beginning of the function

include/qapi/error.h advises to put ERRP_GUARD() right at the
beginning of the function, because only then can it guard the whole
function.

error: Move ERRP_GUARD() to the beginning of the function

include/qapi/error.h advises to put ERRP_GUARD() right at the
beginning of the function, because only then can it guard the whole
function. Clean up the few spots disregarding the advice.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221121085054.683122-4-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

show more ...

Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

- Add new thread-pool-min/thread-pool-max parameters to control the thread pool
used for async I/O.

-

Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging

Pull request

- Add new thread-pool-min/thread-pool-max parameters to control the thread pool
used for async I/O.

- Fix virtio-scsi IOThread 100% CPU consumption QEMU 7.0 regression.

# -----BEGIN PGP SIGNATURE-----
#
# iQEzBAABCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmJ5DqgACgkQnKSrs4Gr
# c8iAqAf/WEJzEso0Hu3UUYJi2lAXpLxWPjoNBlPdQlKIJ/I0zQIF0P7GeCifF+0l
# iMjgBv0ofyAuV47gaTJlVrAR75+hJ/IXNDhnu3UuvNWfVOqvksgw6kuHkMo9A2hC
# 4tIHEU9J8jbQSSdQTaZR8Zj4FX1/zcxMBAXT3YO3De6zo78RatBTuNP4dsZzt8bI
# Qs1a4A0p2ScNXK8EcF4QwAWfoxu9OPPzN52DBCNxcIcnn0SUab4NbDxzpRV4ZhDP
# 08WoafI5O+2Kb36QysJN01LqajHrClG/fozrPzBLq5aZUK3xewJGB1hEdGTLkkmz
# NJNBg5Ldszwj4PDZ1dFU3/03aigb3g==
# =t5eR
# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 09 May 2022 05:52:56 AM PDT
# gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]

* tag 'block-pull-request' of https://gitlab.com/stefanha/qemu:
virtio-scsi: move request-related items from .h to .c
virtio-scsi: clean up virtio_scsi_handle_cmd_vq()
virtio-scsi: clean up virtio_scsi_handle_ctrl_vq()
virtio-scsi: clean up virtio_scsi_handle_event_vq()
virtio-scsi: don't waste CPU polling the event virtqueue
virtio-scsi: fix ctrl and event handler functions in dataplane mode
util/event-loop-base: Introduce options to set the thread pool size
util/main-loop: Introduce the main loop into QOM
Introduce event-loop-base abstract class

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

util/event-loop-base: Introduce options to set the thread pool size

The thread pool regulates itself: when idle, it kills threads until
empty, when in demand, it creates new threads until full. This

util/event-loop-base: Introduce options to set the thread pool size

The thread pool regulates itself: when idle, it kills threads until
empty, when in demand, it creates new threads until full. This behaviour
doesn't play well with latency sensitive workloads where the price of
creating a new thread is too high. For example, when paired with qemu's
'-mlock', or using safety features like SafeStack, creating a new thread
has been measured take multiple milliseconds.

In order to mitigate this let's introduce a new 'EventLoopBase'
property to set the thread pool size. The threads will be created during
the pool's initialization or upon updating the property's value, remain
available during its lifetime regardless of demand, and destroyed upon
freeing it. A properly characterized workload will then be able to
configure the pool to avoid any latency spikes.

Signed-off-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Message-id: 20220425075723.20019-4-nsaenzju@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

Introduce event-loop-base abstract class

Introduce the 'event-loop-base' abstract class, it'll hold the
properties common to all event loops and provide the necessary hooks for
their creation and ma

Introduce event-loop-base abstract class

Introduce the 'event-loop-base' abstract class, it'll hold the
properties common to all event loops and provide the necessary hooks for
their creation and maintenance. Then have iothread inherit from it.

EventLoopBaseClass is defined as user creatable and provides a hook for
its children to attach themselves to the user creatable class 'complete'
function. It also provides an update_params() callback to propagate
property changes onto its children.

The new 'event-loop-base' class will live in the root directory. It is
built on its own using the 'link_whole' option (there are no direct
function dependencies between the class and its children, it all happens
trough 'constructor' magic). And also imposes new compilation
dependencies:

qom <- event-loop-base <- blockdev (iothread.c)

And in subsequent patches:

qom <- event-loop-base <- qemuutil (util/main-loop.c)

All this forced some amount of reordering in meson.build:

- Moved qom build definition before qemuutil. Doing it the other way
around (i.e. moving qemuutil after qom) isn't possible as a lot of
core libraries that live in between the two depend on it.

- Process the 'hw' subdir earlier, as it introduces files into the
'qom' source set.

No functional changes intended.

Signed-off-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Message-id: 20220425075723.20019-2-nsaenzju@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Pull request

# gpg: Signature made Mon 11 Oct 2021 05:40:35 AM PDT
# gpg: using RSA key 8695A8BFD

Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Pull request

# gpg: Signature made Mon 11 Oct 2021 05:40:35 AM PDT
# gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]

* remotes/stefanha/tags/block-pull-request:
iothread: use IOThreadParamInfo in iothread_[set|get]_param()
iothread: rename PollParamInfo to IOThreadParamInfo

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

iothread: use IOThreadParamInfo in iothread_[set|get]_param()

Commit 0445409d74 ("iothread: generalize
iothread_set_param/iothread_get_param") moved common code to set and
get IOThread parameters in

iothread: use IOThreadParamInfo in iothread_[set|get]_param()

Commit 0445409d74 ("iothread: generalize
iothread_set_param/iothread_get_param") moved common code to set and
get IOThread parameters in two new functions.

These functions are called inside callbacks, so we don't need to use an
opaque pointer. Let's replace `void *opaque` parameter with
`IOThreadParamInfo *info`.

Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20210727145936.147032-3-sgarzare@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

iothread: rename PollParamInfo to IOThreadParamInfo

Commit 1793ad0247 ("iothread: add aio-max-batch parameter") added
a new parameter (aio-max-batch) to IOThread and used PollParamInfo
structure to

iothread: rename PollParamInfo to IOThreadParamInfo

Commit 1793ad0247 ("iothread: add aio-max-batch parameter") added
a new parameter (aio-max-batch) to IOThread and used PollParamInfo
structure to handle it.

Since it is not a parameter of the polling mechanism, we rename the
structure to a more generic IOThreadParamInfo.

Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20210727145936.147032-2-sgarzare@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/stefanha-gitlab/tags/block-pull-request' into staging

Pull request

Stefano's performance regression fix for commit 2558cb8dd4 ("linux-aio:
increasing MAX_EVENT

Merge remote-tracking branch 'remotes/stefanha-gitlab/tags/block-pull-request' into staging

Pull request

Stefano's performance regression fix for commit 2558cb8dd4 ("linux-aio:
increasing MAX_EVENTS to a larger hardcoded value").

# gpg: Signature made Wed 21 Jul 2021 14:12:47 BST
# gpg: using RSA key 8695A8BFD3F97CDAAC35775A9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" [full]
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" [full]
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha-gitlab/tags/block-pull-request:
linux-aio: limit the batch size using `aio-max-batch` parameter
iothread: add aio-max-batch parameter
iothread: generalize iothread_set_param/iothread_get_param

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

iothread: add aio-max-batch parameter

The `aio-max-batch` parameter will be propagated to AIO engines
and it will be used to control the maximum number of queued requests.

When there are in queue a

iothread: add aio-max-batch parameter

The `aio-max-batch` parameter will be propagated to AIO engines
and it will be used to control the maximum number of queued requests.

When there are in queue a number of requests equal to `aio-max-batch`,
the engine invokes the system call to forward the requests to the kernel.

This parameter allows us to control the maximum batch size to reduce
the latency that requests might accumulate while queued in the AIO
engine queue.

If `aio-max-batch` is equal to 0 (default value), the AIO engine will
use its default maximum batch size value.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20210721094211.69853-3-sgarzare@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

iothread: generalize iothread_set_param/iothread_get_param

Changes in preparation for next patches where we add a new
parameter not related to the poll mechanism.

Let's add two new generic function

iothread: generalize iothread_set_param/iothread_get_param

Changes in preparation for next patches where we add a new
parameter not related to the poll mechanism.

Let's add two new generic functions (iothread_set_param and
iothread_get_param) that we use to set and get IOThread
parameters.

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20210721094211.69853-2-sgarzare@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

show more ...

Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2021-06-15-v2' into staging

nbd patches for 2021-06-15

- bug fixes in coroutine aio context handling
- rework NBD client connection logic t

Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2021-06-15-v2' into staging

nbd patches for 2021-06-15

- bug fixes in coroutine aio context handling
- rework NBD client connection logic to perform more work in coroutine

# gpg: Signature made Fri 18 Jun 2021 18:29:39 BST
# gpg: using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg: aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg: aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2 F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-nbd-2021-06-15-v2: (34 commits)
block/nbd: safer transition to receiving request
block/nbd: add nbd_client_connected() helper
block/nbd: reuse nbd_co_do_establish_connection() in nbd_open()
nbd/client-connection: add option for non-blocking connection attempt
block/nbd: split nbd_co_do_establish_connection out of nbd_reconnect_attempt
block-coroutine-wrapper: allow non bdrv_ prefix
nbd/client-connection: return only one io channel
block/nbd: drop BDRVNBDState::sioc
block/nbd: don't touch s->sioc in nbd_teardown_connection()
block/nbd: use negotiation of NBDClientConnection
block/nbd: split nbd_handle_updated_info out of nbd_client_handshake()
nbd/client-connection: shutdown connection on release
nbd/client-connection: implement connection retry
nbd/client-connection: add possibility of negotiation
nbd/client-connection: use QEMU_LOCK_GUARD
nbd: move connection code from block/nbd to nbd/client-connection
block/nbd: introduce nbd_client_connection_release()
block/nbd: introduce nbd_client_connection_new()
block/nbd: rename NBDConnectThread to NBDClientConnection
block/nbd: make nbd_co_establish_connection_cancel() bs-independent
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

async: the main AioContext is only "current" if under the BQL

If we want to wake up a coroutine from a worker thread, aio_co_wake()
currently does not work. In that scenario, aio_co_wake() calls
ai

async: the main AioContext is only "current" if under the BQL

If we want to wake up a coroutine from a worker thread, aio_co_wake()
currently does not work. In that scenario, aio_co_wake() calls
aio_co_enter(), but there is no current AioContext and therefore
qemu_get_current_aio_context() returns the main thread. aio_co_wake()
then attempts to call aio_context_acquire() instead of going through
aio_co_schedule().

The default case of qemu_get_current_aio_context() was added to cover
synchronous I/O started from the vCPU thread, but the main and vCPU
threads are quite different. The main thread is an I/O thread itself,
only running a more complicated event loop; the vCPU thread instead
is essentially a worker thread that occasionally calls
qemu_mutex_lock_iothread(). It is only in those critical sections
that it acts as if it were the home thread of the main AioContext.

Therefore, this patch detaches qemu_get_current_aio_context() from
iothreads, which is a useless complication. The AioContext pointer
is stored directly in the thread-local variable, including for the
main loop. Worker threads (including vCPU threads) optionally behave
as temporary home threads if they have taken the big QEMU lock,
but if that is not the case they will always schedule coroutines
on remote threads via aio_co_schedule().

With this change, the stub qemu_mutex_iothread_locked() must be changed
from true to false. The previous value of true was needed because the
main thread did not have an AioContext in the thread-local variable,
but now it does have one.

Reported-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210609122234.544153-1-pbonzini@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Tested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[eblake: tweak commit message per Vladimir's review]
Signed-off-by: Eric Blake <eblake@redhat.com>

show more ...