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Needed so compilation units including it can be common.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-9-pierrick.bouvier@linaro.org>
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Previous commit changed files relying transitively on it.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-8-pierrick.bouvier@linaro.org>
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Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-7-pierrick.bouvier@linaro.org>
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Will allow to make system/memory.c common later.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-6-pierrick.bouvier@linaro.org>
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They are now accessible through exec/memory.h instead, and we make sure
all variants are available for common or target dependent code.
Move stl_phys_notdirty function as well.
Cached endianness agnostic version rely on st/ld*_p, which is available
through tswap.h.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-5-pierrick.bouvier@linaro.org>
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They are now accessible through exec/memory.h instead, and we make sure
all variants are available for common or target dependent code.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-4-pierrick.bouvier@linaro.org>
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Defining functions allows to use them from common code, by not depending
on TARGET_BIG_ENDIAN.
Remove previous macros from exec/cpu-all.h.
By moving them out of cpu-all.h, we'll be able to break dependency on
cpu.h for memory related functions coming in next commits.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-3-pierrick.bouvier@linaro.org>
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target_words_bigendian()
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250317183417.285700-2-pierrick.bouvier@linaro.org>
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staging
* Remove the obsolete s390-ccw-virtio-2.9 machine type
* Prepare the dump-skeys QMP command for the universal binary project
* Add compat machine types for 10.1
* Convert the remaining Avocado tests to the functional framework
* Some more small fixes for the functional tests
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# gpg: Signature made Wed 23 Apr 2025 02:00:48 EDT
# gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg: issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* tag 'pull-request-2025-04-23' of https://gitlab.com/thuth/qemu: (29 commits)
MAINTAINERS: Add functional tests that are not covered yet
tests/functional: Remove unnecessary import statements
tests/functional: Remove semicolons at the end of lines
Remove the remainders of the Avocado tests
docs/devel/testing: Dissolve the ci-definitions.rst.inc file
gitlab-ci: Update QEMU_JOB_AVOCADO and QEMU_CI_AVOCADO_TESTING
tests/functional: Convert the SMMU test to the functional framework
tests/functional: Use the tuxrun kernel for the aarch64 replay test
tests/functional: Use the tuxrun kernel for the x86 replay test
tests/avocado: Remove the boot_linux.py tests
tests/functional: Convert the 64-bit big endian Wheezy mips test
tests/functional: Convert the 64-bit little endian Wheezy mips test
tests/functional: Convert the 32-bit little endian Wheezy mips test
tests/functional: Convert the 32-bit big endian Wheezy mips test
tests/avocado: Remove the LinuxKernelTest class
tests/functional: Convert the i386 replay avocado test
tests/functional: Convert reverse_debugging tests to the functional framework
tests/functional: Move the check for the parameters from avocado to functional
gitlab-ci: Remove the avocado tests from the CI pipelines
tests/functional/test_vnc: skip test if no crypto backend available
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Some minor fixes for various things
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# gpg: Signature made Wed 16 Apr 2025 19:53:08 EDT
# gpg: using RSA key FD0D5CE67CE0F59A6688268661F38C90919BFF81
# gpg: Good signature from "Corey Minyard <cminyard@mvista.com>" [unknown]
# gpg: aka "Corey Minyard <corey@minyard.net>" [unknown]
# gpg: aka "Corey Minyard <minyard@mvista.com>" [unknown]
# gpg: aka "Corey Minyard <minyard@acm.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: FD0D 5CE6 7CE0 F59A 6688 2686 61F3 8C90 919B FF81
* tag 'ipmi-for-qemu-10.0' of https://github.com/cminyard/qemu:
ipmi/bmc-sim: add error handling for 'Set BMC Global Enables' command
ipmi/bmc-sim: implement watchdog dont log flag
ipmi/bmc-sim: Add 'Get Channel Info' command
ipmi: add fwinfo to pci ipmi devices
ipmi/pci-ipmi-bt: Rename copy-paste variables
hw/ipmi: Move vmsd registration to device class
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Add 10.1 machine types for arm/i440fx/m68k/q35/s390x/spapr.
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20250414094543.221241-1-cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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In preparation to make @dump-skeys command generic,
extract s390_qmp_dump_skeys() out of qmp_dump_skeys().
Register it as CCW qmp_dump_skeys() callback.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Message-ID: <20250310151414.11550-4-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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The storage keys are part of the machine memory.
Introduce the TYPE_DUMP_SKEYS_INTERFACE type,
allowing machine using storage keys to dump them
when a DumpSKeysInterface::qmp_dump_skeys() callback
is provided.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250310151414.11550-3-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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Now that the machine types that set the migration_enabled flag to
false are gone, we can remove it and the related code.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250115073819.15452-5-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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Now that the machine types that set the migration_enabled flag to
false are gone, we can remove it and the related code.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250115073819.15452-4-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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Now that the s390-ccw-virtio-2.9 machine type has been removed, we
don't need the "css_migration_enabled" variable anymore and can remove
the related code.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20250115073819.15452-3-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
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Linux issues this command when booting a powernv machine.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <20250401140153.685523-4-npiggin@gmail.com>
Signed-off-by: Corey Minyard <corey@minyard.net>
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This requires some adjustments to callers to avoid possible behaviour
changes for PCI devices.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-ID: <20250401140153.685523-3-npiggin@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
[Rename pci_ipmi_bt_get_fwinfo to pci_ipmi_kcs_get_fwinfo in the
pci_ipmi_kcs.c file.]
Signed-off-by: Corey Minyard <corey@minyard.net>
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This patch addresses potential data races involving access to Job fields
in the test-bdrv-drain test.
Fixes: 7253220de4 ("test-bdrv-drain: Test drain vs. block jobs")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2900
Signed-off-by: Vitalii Mordan <mordan@ispras.ru>
Message-ID: <20250402102119.3345626-1-mordan@ispras.ru>
[kwolf: Fixed up coding style and one missing atomic access]
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Match the prototype of cpu_memory_rw_debug().
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250325224403.4011975-4-richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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The SoC has three SPI controllers, not four.
Remove the extra define of an SPI IRQ.
Fixes: 06908a84f036 "hw/arm/fsl-imx8mp: Add SPI controllers"
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-ID: <20250318205709.28862-4-shentey@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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Deriving from TYPE_SYS_BUS_DEVICE fixes the SoC object to be reset upon machine
reset. It also makes the SoC implementation not user-creatable which can trigger
the following crash:
$ ./qemu-system-aarch64 -M virt -device fsl-imx8mp
**
ERROR:../../devel/qemu/tcg/tcg.c:1006:tcg_register_thread: assertion failed:
(n < tcg_max_ctxs)
Bail out! ERROR:../../devel/qemu/tcg/tcg.c:1006:tcg_register_thread:
assertion failed: (n < tcg_max_ctxs)
Aborted (core dumped)
Fixes: a4eefc69b237 "hw/arm: Add i.MX 8M Plus EVK board"
Reported-by: Thomas Huth <thuth@redhat.com>
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-ID: <20250318205709.28862-3-shentey@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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staging
aspeed queue:
* Fix AST2700 SoC model
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# gpg: Signature made Sun 23 Mar 2025 13:44:13 EDT
# gpg: using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@redhat.com>" [full]
# gpg: aka "Cédric Le Goater <clg@kaod.org>" [full]
# Primary key fingerprint: A0F6 6548 F048 95EB FE6B 0B60 51A3 43C7 CFFB ECA1
* tag 'pull-aspeed-20250323' of https://github.com/legoater/qemu:
hw/misc/aspeed_hace: Fix buffer overflow in has_padding function
hw/intc/aspeed: Fix IRQ handler mask check
aspeed: Fix maximum number of spi controller
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Commit 6de4aa8dc544 ("hw/arm/aspeed_ast27x0: Add SoC Support for AST2700
A1") extends ast2700a1 spis_num to 3, but ASPEED_SPIS_NUM defines the
maximum number of spi controller to 2, result in ehci[0] is being
overwritten in runtime.
Signed-off-by: Troy Lee <troy_lee@aspeedtech.com>
Fixes: 6de4aa8dc544 ("hw/arm/aspeed_ast27x0: Add SoC Support for AST2700 A1")
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250317065938.1902272-1-troy_lee@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
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* exec/cpu-all: remove BSWAP_NEEDED
* pl011: pad C PL011State struct to same size as Rust struct
* rust: hpet: fix type of "timers" property
* rust: hpet: fix functional tests (and really everything that uses it)
* rust: Kconfig: Factor out whether devices are Rust or C
* rust: vmstate: Fixes and tests
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# gpg: Signature made Fri 21 Mar 2025 14:34:51 EDT
# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg: issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* tag 'for-upstream' of https://gitlab.com/bonzini/qemu: (24 commits)
rust: hpet: fix decoding of timer registers
rust/vmstate: Include complete crate path of VMStateFlags in vmstate_clock
rust/vmstate: Add unit test for vmstate_validate
rust/vmstate: Add unit test for pointer case
rust/vmstate: Add unit test for vmstate_{of|struct} macro
rust/vmstate: Add unit test for vmstate_of macro
rust/vmstate: Support vmstate_validate
rust/vmstate: Re-implement VMState trait for timer binding
rust/vmstate: Relax array check when build varray in vmstate_struct
rust/vmstate: Fix unnecessary VMState bound of with_varray_flag()
rust/vmstate: Fix "cannot infer type" error in vmstate_struct
rust/vmstate: Fix type check for varray in vmstate_struct
rust/vmstate: Fix size field of VMStateField with VMS_ARRAY_OF_POINTER flag
rust/vmstate: Fix num field when varray flags are set
rust/vmstate: Fix num_offset in vmstate macros
rust/vmstate: Remove unnecessary unsafe
exec/cpu-all: remove BSWAP_NEEDED
load_aout: replace bswap_needed with big_endian
rust: pl011: Check size of state struct at compile time
hw/char/pl011: Pad PL011State struct to same size as Rust impl
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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This identifier is poisoned, so it can't be used from common code
anyway. We replace all occurrences with its definition directly.
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Link: https://lore.kernel.org/r/20250320223002.2915728-2-pierrick.bouvier@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Targets know whether they are big-endian more than they know if
the endianness is different from the host: the former is mostly
a constant, at least in machine creation code, while the latter
has to be computed with TARGET_BIG_ENDIAN != HOST_BIG_ENDIAN or
something like that.
load_aout, however, takes a "bswap_needed" argument. Replace
it with a "big_endian" argument; even though all users are
big-endian, it is cheap enough to keep the optional swapping
functionality even for little-endian boards.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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We have some users of the PL011 struct which embed it directly into
their own state structs. This means that the Rust version of the
device must have a state struct that is the same size or smaller
than the C struct.
In commit 9b642097d6b7 ("rust: pl011: switch to safe chardev operation")
the Rust PL011 state struct changed from having a bindings::CharBackend
to a chardev::CharBackend, which made it grow larger than the C
version. This results in an assertion at startup when QEMU was
built with Rust enabled:
$ qemu-system-arm -M raspi2b -display none
ERROR:../../qom/object.c:562:object_initialize_with_type: assertion
failed: (size >= type->instance_size)
The long-term better approach to this problem would be to move
our C device code patterns away from "embed a struct" and (back)
to "have a pointer to the device", so we can make the C PL011State
struct a private implementation detail rather than exposed to
its users.
For the short term, add a padding field at the end of the C struct
so it's big enough that the Rust state struct can fit.
Fixes: 9b642097d6b7 ("rust: pl011: switch to safe chardev operation")
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Link: https://lore.kernel.org/r/20250321112523.1774131-3-peter.maydell@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
|
|
Rather than use the hardcoded define throughout the tree for the
PNOR LPC address, keep it within the PnvPnor object.
This should solve a dead code issue in the BMC HIOMAP checks where
Coverity (correctly) reported that the sanity checks are dead code.
We would like to keep the sanity checks without turning them into a
compile time assert in case we would like to make them configurable
in future.
Fixes: 4c84a0a4a6e5 ("ppc/pnv: Add a PNOR address and size sanity checks")
Resolves: Coverity CID 1593723
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
|
|
Define the cpr_is_incoming helper, to be used in several cpr fix patches.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Message-ID: <1741380954-341079-2-git-send-email-steven.sistare@oracle.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
|
|
Block layer patches
- virtio-scsi: add iothread-vq-mapping parameter
- Improve writethrough performance
- Fix missing zero init in bdrv_snapshot_goto()
- Added scripts/qcow2-to-stdout.py
- Code cleanup and iotests fixes
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# gpg: Signature made Fri 14 Mar 2025 01:00:27 HKT
# gpg: using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
# gpg: issuer "kwolf@redhat.com"
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6
* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (23 commits)
scripts/qcow2-to-stdout.py: Add script to write qcow2 images to stdout
virtio-scsi: only expose cmd vqs via iothread-vq-mapping
virtio-scsi: handle ctrl virtqueue in main loop
virtio-scsi: add iothread-vq-mapping parameter
virtio: extract iothread-vq-mapping.h API
virtio-blk: tidy up iothread_vq_mapping functions
virtio-blk: extract cleanup_iothread_vq_mapping() function
virtio-scsi: perform TMFs in appropriate AioContexts
virtio-scsi: protect events_dropped field
virtio-scsi: introduce event and ctrl virtqueue locks
scsi: introduce requests_lock
scsi: track per-SCSIRequest AioContext
dma: use current AioContext for dma_blk_io()
scsi-disk: drop unused SCSIDiskState->bh field
iotests: Limit qsd-migrate to working formats
aio-posix: Adjust polling time also for new handlers
aio-posix: Separate AioPolledEvent per AioHandler
aio-posix: Factor out adjust_polling_time()
aio: Create AioPolledEvent
block/io: Ignore FUA with cache.no-flush=on
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Previously the ctrl virtqueue was handled in the AioContext where SCSI
requests are processed. When IOThread Virtqueue Mapping was added things
become more complicated because SCSI requests could run in other
AioContexts.
Simplify by handling the ctrl virtqueue in the main loop where reset
operations can be performed. Note that BHs are still used canceling SCSI
requests in their AioContexts but at least the mean loop activity
doesn't need BHs anymore.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20250311132616.1049687-13-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Allow virtio-scsi virtqueues to be assigned to different IOThreads. This
makes it possible to take advantage of host multi-queue block layer
scalability by assigning virtqueues that have affinity with vCPUs to
different IOThreads that have affinity with host CPUs. The same feature
was introduced for virtio-blk in the past:
https://developers.redhat.com/articles/2024/09/05/scaling-virtio-blk-disk-io-iothread-virtqueue-mapping
Here are fio randread 4k iodepth=64 results from a 4 vCPU guest with an
Intel P4800X SSD:
iothreads IOPS
------------------------------
1 189576
2 312698
4 346744
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20250311132616.1049687-12-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
[kwolf: Updated 051 output, virtio-scsi can now use any iothread]
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
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The code that builds an array of AioContext pointers indexed by the
virtqueue is not specific to virtio-blk. virtio-scsi will need to do the
same thing, so extract the functions.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250311132616.1049687-11-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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The block layer can invoke the resize callback from any AioContext that
is processing requests. The virtqueue is already protected but the
events_dropped field also needs to be protected against races. Cover it
using the event virtqueue lock because it is closely associated with
accesses to the virtqueue.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250311132616.1049687-7-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Virtqueues are not thread-safe. Until now this was not a major issue
since all virtqueue processing happened in the same thread. The ctrl
queue's Task Management Function (TMF) requests sometimes need the main
loop, so a BH was used to schedule the virtqueue completion back in the
thread that has virtqueue access.
When IOThread Virtqueue Mapping is introduced in later commits, event
and ctrl virtqueue accesses from other threads will become necessary.
Introduce an optional per-virtqueue lock so the event and ctrl
virtqueues can be protected in the commits that follow.
The addition of the ctrl virtqueue lock makes
virtio_scsi_complete_req_from_main_loop() and its BH unnecessary.
Instead, take the ctrl virtqueue lock from the main loop thread.
The cmd virtqueue does not have a lock because the entirety of SCSI
command processing happens in one thread. Only one thread accesses the
cmd virtqueue and a lock is unnecessary.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250311132616.1049687-6-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
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SCSIDevice keeps track of in-flight requests for device reset and Task
Management Functions (TMFs). The request list requires protection so
that multi-threaded SCSI emulation can be implemented in commits that
follow.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250311132616.1049687-5-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Until now, a SCSIDevice's I/O requests have run in a single AioContext.
In order to support multiple IOThreads it will be necessary to move to
the concept of a per-SCSIRequest AioContext.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250311132616.1049687-4-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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In the past a single AioContext was used for block I/O and it was
fetched using blk_get_aio_context(). Nowadays the block layer supports
running I/O from any AioContext and multiple AioContexts at the same
time. Remove the dma_blk_io() AioContext argument and use the current
AioContext instead.
This makes calling the function easier and enables multiple IOThreads to
use dma_blk_io() concurrently for the same block device.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250311132616.1049687-3-stefanha@redhat.com>
Tested-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Adaptive polling has a big problem: It doesn't consider that an event
loop can wait for many different events that may have very different
typical latencies.
For example, think of a guest that tends to send a new I/O request soon
after the previous I/O request completes, but the storage on the host is
rather slow. In this case, getting the new request from guest quickly
means that polling is enabled, but the next thing is performing the I/O
request on the backend, which is slow and disables polling again for the
next guest request. This means that in such a scenario, polling could
help for every other event, but is only ever enabled when it can't
succeed.
In order to fix this, keep a separate AioPolledEvent for each
AioHandler. We will then know that the backend file descriptor always
has a high latency and isn't worth polling for, but we also know that
the guest is always fast and we should poll for it. This solves at least
half of the problem, we can now keep polling for those cases where it
makes sense and get the improved performance from it.
Since the event loop doesn't know which event will be next, we still do
some unnecessary polling while we're waiting for the slow disk. I made
some attempts to be more clever than just randomly growing and shrinking
the polling time, and even to let callers be explicit about when they
expect a new event, but so far this hasn't resulted in improved
performance or even caused performance regressions. For now, let's just
fix the part that is easy enough to fix, we can revisit the rest later.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250307221634.71951-6-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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As a preparation for having multiple adaptive polling states per
AioContext, move the 'ns' field into a separate struct.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250307221634.71951-4-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
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Until now, FUA was always emulated with a separate flush after the write
for file-posix. The overhead of processing a second request can reduce
performance significantly for a guest disk that has disabled the write
cache, especially if the host disk is already write through, too, and
the flush isn't actually doing anything.
Advertise support for REQ_FUA in write requests and implement it for
Linux AIO and io_uring using the RWF_DSYNC flag for write requests. The
thread pool still performs a separate fdatasync() call. This can be
improved later by using the pwritev2() syscall if available.
As an example, this is how fio numbers can be improved in some scenarios
with this patch (all using virtio-blk with cache=directsync on an nvme
block device for the VM, fio with ioengine=libaio,direct=1,sync=1):
| old | with FUA support
------------------------------+---------------+-------------------
bs=4k, iodepth=1, numjobs=1 | 45.6k iops | 56.1k iops
bs=4k, iodepth=1, numjobs=16 | 183.3k iops | 236.0k iops
bs=4k, iodepth=16, numjobs=1 | 258.4k iops | 311.1k iops
However, not all scenarios are clear wins. On another slower disk I saw
little to no improvment. In fact, in two corner case scenarios, I even
observed a regression, which I however consider acceptable:
1. On slow host disks in a write through cache mode, when the guest is
using virtio-blk in a separate iothread so that polling can be
enabled, and each completion is quickly followed up with a new
request (so that polling gets it), it can happen that enabling FUA
makes things slower - the additional very fast no-op flush we used to
have gave the adaptive polling algorithm a success so that it kept
polling. Without it, we only have the slow write request, which
disables polling. This is a problem in the polling algorithm that
will be fixed later in this series.
2. With a high queue depth, it can be beneficial to have flush requests
for another reason: The optimisation in bdrv_co_flush() that flushes
only once per write generation acts as a synchronisation mechanism
that lets all requests complete at the same time. This can result in
better batching and if the disk is very fast (I only saw this with a
null_blk backend), this can make up for the overhead of the flush and
improve throughput. In theory, we could optionally introduce a
similar artificial latency in the normal completion path to achieve
the same kind of completion batching. This is not implemented in this
series.
Compatibility is not a concern for the kernel side of io_uring, it has
supported RWF_DSYNC from the start. However, io_uring_prep_writev2() is
not available before liburing 2.2.
Linux AIO started supporting it in Linux 4.13 and libaio 0.3.111. The
kernel is not a problem for any supported build platform, so it's not
necessary to add runtime checks. However, openSUSE is still stuck with
an older libaio version that would break the build.
We must detect the presence of the writev2 functions in the user space
libraries at build time to avoid build failures.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250307221634.71951-2-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
|
Misc HW patches
- Set correct values for MPC8569E's eSDHC (Zoltan)
- Emulate Ricoh RS5C372 RTC device (Bernhard)
- Array overflow fixes in SMSC91C111 netdev (Peter)
- Fix typo in Xen HVM (Philippe)
- Move graphic height/width/depth globals to their own file (Philippe)
- Introduce qemu_arch_available() helper (Philippe)
- Check fw_cfg's ACPI availability at runtime (Philippe)
- Remove virtio-mem dependency on CONFIG_DEVICES (Philippe)
- Sort HyperV SYNDBG API definitions (Pierrick)
- Remove need for SDHCI_VENDOR_FSL definition (Philippe)
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* tag 'hw-misc-20250312' of https://github.com/philmd/qemu:
hw/sd/sdhci: Remove need for SDHCI_VENDOR_IMX definition
hw/hyperv/hyperv-proto: Move SYNDBG definitions from target/i386
hw/virtio/virtio-mem: Remove CONFIG_DEVICES include
hw/i386/fw_cfg: Check ACPI availability with acpi_builtin()
hw/acpi: Introduce acpi_builtin() helper
system: Replace arch_type global by qemu_arch_available() helper
system: Extract target-specific globals to their own compilation unit
hw/xen/hvm: Fix Aarch64 typo
hw/net/smc91c111: Don't allow data register access to overrun buffer
hw/net/smc91c111: Use MAX_PACKET_SIZE instead of magic numbers
hw/net/smc91c111: Sanitize packet length on tx
hw/net/smc91c111: Sanitize packet numbers
hw/rtc: Add Ricoh RS5C372 RTC emulation
hw/sd/sdhci: Set reset value of interrupt registers
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
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vfio queue:
* Fixed endianness of VFIO device state packets
* Improved IGD passthrough support with legacy mode
* Improved build
* Added support for old AMD GPUs (x550)
* Updated property documentation
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# gpg: aka "Cédric Le Goater <clg@kaod.org>" [full]
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* tag 'pull-vfio-20250311' of https://github.com/legoater/qemu: (21 commits)
vfio/pci: Drop debug commentary from x-device-dirty-page-tracking
vfio/pci-quirks: Exclude non-ioport BAR from ATI quirk
hw/vfio: Compile display.c once
hw/vfio: Compile iommufd.c once
hw/vfio: Compile more objects once
hw/vfio: Compile some common objects once
hw/vfio/common: Get target page size using runtime helpers
hw/vfio/common: Include missing 'system/tcg.h' header
hw/vfio/spapr: Do not include <linux/kvm.h>
system: Declare qemu_[min/max]rampagesize() in 'system/hostmem.h'
vfio/migration: Use BE byte order for device state wire packets
vfio/igd: Fix broken KVMGT OpRegion support
vfio/igd: Introduce x-igd-lpc option for LPC bridge ID quirk
vfio/igd: Handle x-igd-opregion option in config quirk
vfio/igd: Decouple common quirks from legacy mode
vfio/igd: Refactor vfio_probe_igd_bar4_quirk into pci config quirk
vfio/pci: Add placeholder for device-specific config space quirks
vfio/igd: Move LPC bridge initialization to a separate function
vfio/igd: Consolidate OpRegion initialization into a single function
vfio/igd: Do not include GTT stolen size in etc/igd-bdsm-size
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
|
All instances of TYPE_IMX_USDHC set vendor=SDHCI_VENDOR_IMX.
No need to special-case it.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20250308213640.13138-3-philmd@linaro.org>
|
|
Allows SYNDBG definitions to be available for common compilation units.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20250307215623.524987-5-pierrick.bouvier@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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acpi_builtin() can be used to check at runtime whether
the ACPI subsystem is built in a qemu-system binary.
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20250307223949.54040-3-philmd@linaro.org>
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qemu_arch_available() is a bit simpler to understand while
reviewing than the undocumented arch_type variable.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20250305005225.95051-5-philmd@linaro.org>
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