In case an emulated process execve()s another emulated process, bind()
will fail, because the socket already exists. So try deleting it. Use
the existing unix_listen() function which does this. Link qemu-user
with qemu-sockets.c and add the monitor_get_fd() stub.
Note that it is not possible to handle this in do_execv(): deleting
gdbserver_user_state.socket_path before safe_execve() is not correct,
because the latter may fail, and afterwards we may lose control.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250117001542.8290-3-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-12-alex.bennee@linaro.org>
Just like for QEMU_LOG_FILENAME, replace %d with PID in the GDB socket
path. This allows running multi-process applications with, e.g.,
export QEMU_GDB=/tmp/qemu-%d.sock. Currently this is not possible,
since the first process will cause the subsequent ones to fail due to
not being able to bind() the GDB socket.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20250117001542.8290-2-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-11-alex.bennee@linaro.org>
Choose a few tests per group and move them from the full set to the
smoke set.
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <20250130184012.5711-3-farosas@suse.de>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-10-alex.bennee@linaro.org>
Add a new command line option to allow selecting between running the
full set of tests or a smaller set of tests. The default will be to
run the small set (i.e. no comand line option provided) so we can
reduce the amount of tests run by default. Only hosts which support
KVM for the target architecture being tested will run the complete set
of tests.
Adjust the meson.build file to pass in the --full option when
appropriate.
(for now, set the option unconditionally until the next patch actually
creates the small set)
Use cases:
configure --target-list=aarch64-softmmu,ppc64-softmmu,s390x-softmmu,x86_64-softmmu
| before - 615s/244 tests | after - 244s/100 tests
------------------------+--------------------------+-----------------------------
make check | full set for all archs | full set for the KVM arch,
make check-qtest | | small set for the rest
| |
qemu-system-$ARCH | full set for $ARCH | small set for $ARCH, KVM or
./migration-test | | TCG automatically chosen
| |
qemu-system-$ARCH | N/A | full set for $ARCH, KVM or
./migration-test --full | | TCG automatically chosen
| |
migration-compat-x86_64 | full set for x86_64 | small set for x86_64
CI job | |
------------------------+--------------------------+-----------------------------
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <20250130184012.5711-2-farosas@suse.de>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-9-alex.bennee@linaro.org>
This reverts commit bc02be4508.
Now we catch attempts to clock_step to the next timer when none are
enabled we can revert the previous attempt to prevent deadlock. As
long as a new target time is given we will move time forward even if
no timers will fire. This is desirable for tests which are checking
that nothing changes when things are disabled.
Previously most tests got away with it because --enable-slirp always
has a timer running while the test is active.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-8-alex.bennee@linaro.org>
It is invalid to call clock_step with an implied time to step forward
as if no timers are running we won't be able to advance.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-7-alex.bennee@linaro.org>
qtest_send_prefix never actually sent something over the chardev, all
it does is print the timestamp to the QTEST_LOG when enabled. So
rename the function, make it static, remove the unused CharDev and
simplify all the call sites by handling that directly with
qtest_send (and qtest_log_send).
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-6-alex.bennee@linaro.org>
Don't both creating a GString to temporarily hold our qtest command.
Instead do a simpler g_strndup and use autofree to clean up
afterwards.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-5-alex.bennee@linaro.org>
Until there are timers enabled the semantics of clock_step_next() will
fail. Since d524441a36 (system/qtest: properly feedback results of
clock_[step|set]) we will signal a FAIL if time doesn't advance.
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-4-alex.bennee@linaro.org>
This replicates the changes from 92cb8f8bf6 (tests/qtest: remove
clock_steps from virtio tests) as there are no timers in the virtio
code. We still busy wait and timeout though.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-3-alex.bennee@linaro.org>
This allows people to run the test locally:
make docker-test-rust@fedora-rust-nightly
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-2-alex.bennee@linaro.org>
missing_const_for_fn is not necessarily useful or good. For example in
a private API you can always add const later, and in a public API
it can be unnecessarily restrictive to annotate everything with const
(blocking further improvements to the API).
Nevertheless, QEMU turns it on because qemu_api uses const quite
aggressively and therefore it can be handy to have as much as possible
annotated with const. Outside qemu_api though, not so much: devices
are self contained consumers and if there is nothing that could use
their functions in const contexts that were not anticipated.
Since missing_const_for_fn can be a bit noisy and trigger on trivial
functions that no one would ever call in const context, do not
turn it on everywhere and only keep it in qemu_api as a special case.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We deprecated i686 system mode support for qemu 8.0. However, to
make real cleanups to TCG we need to deprecate all 32-bit hosts.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
For system mode, we can rarely support the amount of RAM that
the guest requires. TCG emulation is restricted to round-robin
mode, which solves many of the atomicity issues, but not those
associated with virtio. In any case, round-robin does nothing
to help the speed of emulation.
For user mode, most emulation does not succeed at all. Most
of the time we cannot even load 64-bit non-PIE binaries due
to lack of a 64-bit address space. Threads are run in
parallel, not round-robin, which means that atomicity
is not handled.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This is now handled by the configs/targets/*.mak fragment.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Define TARGET_LONG_BITS in each target's configure fragment.
Do this without removing the define in target/*/cpu-param.h
so that errors are caught like so:
In file included from .../src/include/exec/cpu-defs.h:26,
from ../src/target/hppa/cpu.h:24,
from ../src/linux-user/qemu.h:4,
from ../src/linux-user/hppa/cpu_loop.c:21:
../src/target/hppa/cpu-param.h:11: error: "TARGET_LONG_BITS" redefined [-Werror]
11 | #define TARGET_LONG_BITS 64
|
In file included from .../src/include/qemu/osdep.h:36,
from ../src/linux-user/hppa/cpu_loop.c:20:
./hppa-linux-user-config-target.h:32: note: this is the location of the previous definition
32 | #define TARGET_LONG_BITS 32
|
cc1: all warnings being treated as errors
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Configuration of 64-bit host on 32-bit guest will shortly
be denied. Use a 32-bit guest instead.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Require a 64-bit host binary to spawn a 64-bit guest.
For HVF this is trivially true because macOS 11 dropped
support for 32-bit applications entirely.
For NVMM, NetBSD only enables nvmm on x86_64:
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/dev/nvmm/Makefile?rev=1.1.6.2;content-type=text%2Fplain
For WHPX, we have already dropped support for 32-bit Windows.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Require a 64-bit host binary to spawn a 64-bit guest.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Require a 64-bit host binary to spawn a 64-bit guest.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This reverts commit dae0ec159f ("accel: build tcg modular").
The attempt was only enabled for x86, only modularized a small
portion of tcg, and in more than 3 years there have been no
follow-ups to improve the situation.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
A small series of patches which enhance the graphics output on 64-bit hppa
machines. Allow disabling the artist graphic card and introduces drivers for
the Diva GSP (remote management) cards which are used in later 64-bit machines
and which we now use for serial console output.
The LMMIO regions of the Astro chip are now supported too, which is important
to support other graphic cards like an ATI PCI card with a 64-bit Linux kernel.
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Merge tag 'hppa-system-for-v10-diva-artist-pull-request' of https://github.com/hdeller/qemu-hppa into staging
HPPA graphics and serial console enhancements
A small series of patches which enhance the graphics output on 64-bit hppa
machines. Allow disabling the artist graphic card and introduces drivers for
the Diva GSP (remote management) cards which are used in later 64-bit machines
and which we now use for serial console output.
The LMMIO regions of the Astro chip are now supported too, which is important
to support other graphic cards like an ATI PCI card with a 64-bit Linux kernel.
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# gpg: Signature made Fri 07 Feb 2025 16:04:33 EST
# gpg: using EDDSA key BCE9123E1AD29F07C049BBDEF712B510A23A0F5F
# gpg: Good signature from "Helge Deller <deller@gmx.de>" [unknown]
# gpg: aka "Helge Deller <deller@kernel.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: 4544 8228 2CD9 10DB EF3D 25F8 3E5F 3D04 A7A2 4603
# Subkey fingerprint: BCE9 123E 1AD2 9F07 C049 BBDE F712 B510 A23A 0F5F
* tag 'hppa-system-for-v10-diva-artist-pull-request' of https://github.com/hdeller/qemu-hppa:
target/hppa: Update SeaBIOS-hppa
hw/pci-host/astro: Add LMMIO range support
hw/hppa: Avoid creation of artist if disabled on command line
artist: Allow disabling artist on command line
hw/hppa: Wire up Diva GSP card
hw/char: Add emulation of Diva GSP PCI management boards
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The '-old-param' command line option is specific to Arm targets; it
is very briefly documented as "old param mode". What this option
actually does is change the behaviour when directly booting a guest
kernel, so that command line arguments are passed to the kernel using
the extremely old "param_struct" ABI, rather than the newer ATAGS or
even newer DTB mechanisms.
This support was added back in 2007 to support an old vendor kernel
on the akita/terrier board types:
https://mail.gnu.org/archive/html/qemu-devel/2007-07/msg00344.html
Even then, it was an out-of-date mechanism from the kernel's
point of view -- the kernel has had a comment since 2001 marking
it as deprecated. As of mid-2024, the kernel only retained
param_struct support for the RiscPC and Footbridge platforms:
https://lore.kernel.org/linux-arm-kernel/2831c5a6-cfbf-4fe0-b51c-0396e5b0aeb7@app.fastmail.com/
None of the board types QEMU supports need param_struct support;
mark this option as deprecated.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20250127123113.2947620-1-peter.maydell@linaro.org
Our current handling of the mask/compare logic in the Cadence
GEM ethernet device is wrong:
(1) we load the same byte twice from rx_buf when
creating the compare value
(2) we ignore the DISABLE_MASK flag
The "Cadence IP for Gigabit Ethernet MAC Part Number: IP7014 IP Rev:
R1p12 - Doc Rev: 1.3 User Guide" states that if the DISABLE_MASK bit
in type2_compare_x_word_1 is set, the mask_value field in
type2_compare_x_word_0 is used as an additional 2 byte Compare Value.
Correct these bugs:
* in the !disable_mask codepath, use lduw_le_p() so we
correctly load a 16-bit value for comparison
* in the disable_mask codepath, we load a full 4-byte value
from rx_buf for the comparison, set the compare value to
the whole of the cr0 register (i.e. the concatenation of
the mask and compare fields), and set mask to 0xffffffff
to force a 32-bit comparison
Signed-off-by: Andrew Yuan <andrew.yuan@jaguarmicro.com>
Message-id: 20241219061658.805-1-andrew.yuan@jaguarmicro.com
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
[PMM: Expand commit message and comment]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
When multiple QOM types are registered in the same file,
it is simpler to use the the DEFINE_TYPES() macro. In
particular because type array declared with such macro
are easier to review.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20250130112615.3219-7-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
No need to duplicate and forward the 'num-cpu' property from
TYPE_ARM11MPCORE_PRIV to TYPE_REALVIEW_MPCORE, alias it with
QOM object_property_add_alias().
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20250130112615.3219-6-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The A7MPCore forward the IRQs from its internal GIC.
To make the code clearer, add the 'mpcore' and 'gic'
variables.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250130112615.3219-5-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The A7MPCore forward the IRQs from its internal GIC.
To make the code clearer, add the 'mpcore' and 'gic'
variables. Rename 'd' variable as 'cpu'.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250130112615.3219-4-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The A9MPCore forward the IRQs from its internal GIC.
To make the code clearer, add the 'mpcore' and 'gic'
variables.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250130112615.3219-3-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In heterogeneous setup the first vCPU might not be
the one expected, better pass it explicitly.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20250130112615.3219-2-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We removed the old table-based decoder in favour of decodetree, but
we left a couple of typedefs that are now unused; delete them.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250128135046.4108775-1-peter.maydell@linaro.org
The test-arm-iwmmmxt test isn't testing what it thinks it's testing.
If you run it with a CPU type that supports iwMMXt then it will crash
immediately with a SIGILL, because (even with -marm) GCC will link it
against startup code that is in Thumb mode, and no iwMMXt CPU has
Thumb:
00010338 <_start>:
10338: f04f 0b00 mov.w fp, #0
1033c: f04f 0e00 mov.w lr, #0
If you run it with a CPU type which does *not* support iwMMXt, which
is what 'make check-tcg' does, then QEMU will not try to handle the
insns as iwMMXt. Instead the translator turns them into illegal
instructions. Then in the linux-user cpu_loop() code we identify
them as FPA11 instructions inside emulate_arm_fpa11(), because the
FPA11 happened to use the same coprocessor number as these iwMMXt
insns. So we execute a completely different set of FPA11 insns,
which means we don't crash, but we will print garbage to stdout.
Then the test binary always exits with a 0 return code, so 'make
check-tcg' thinks the test passes.
Modern gnueabihf toolchains assume in their startup code that the CPU
is not so old as to not support Thumb, so there's no way to get them
to generate a binary that actually does what the test wants. Since
we're deprecating iwMMXt emulation anyway, it's not worth trying to
salvage the test case to get it to really test the iwMMXt insns.
Delete the test entirely.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250127112715.2936555-3-peter.maydell@linaro.org
The pxa2xx CPUs are now only useful with user-mode emulation, because
we dropped all the machine types that used them in 9.2. (Technically
you could alse use "-cpu pxa270" with a board model like versatilepb
which doesn't sanity-check the CPU type, but that has never been a
supported config.)
To use them (or iwMMXt emulation) with QEMU user-mode you would need
to explicitly select them with the -cpu option or the QEMU_CPU
environment variable. A google search finds no examples of anybody
doing this in the last decade; I don't believe the GCC folks are
using QEMU to test their iwMMXt codegen either. In fact, GCC is in
the process of dropping support for iwMMXT entirely.
The iwMMXt emulation is thousands of lines of code in QEMU, and
is now the only bit of Arm insn decode which doesn't use decodetree.
We have no way to test or validate changes to it. This code is
just dead weight that is almost certainly not being used by anybody.
Mark it as deprecated.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250127112715.2936555-2-peter.maydell@linaro.org
Being the first crate added to QEMU, pl011 has a rather restrictive
Clippy setup. This can be sometimes a bit too heavy on its suggestions,
for example
error: this could be a `const fn`
--> hw/char/pl011/src/device.rs:382:5
|
382 | / fn set_read_trigger(&mut self) {
383 | | self.read_trigger = 1;
384 | | }
| |_____^
Just use the standard set that is present in rust/Cargo.toml, with
just a small adjustment to allow upper case acronyms which are used
for register names.
Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Generalize the existing optimization of "TSTNE x,sign" and "TSTNE x,-1".
This can be useful for example in the i386 frontend, which will generate
tests of zero-extended registers against 0xffffffff.
Ironically, on x86 hosts this is a very slight pessimization in the very
case it's meant to optimize because
brcond_i64 cc_dst,$0xffffffff,tsteq,$L1
(test %ebx, %ebx) is 1 byte smaller than
brcond_i64 cc_dst,$0x0,eq,$L1
(test %rbx, %rbx). However, in general it is an improvement, especially
if it avoids placing a large immediate in the constant pool.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add a test case which tests some corner case behaviour of
fused-multiply-add on x86:
* 0 * Inf + SNaN should raise Invalid
* 0 * Inf + QNaN shouldh not raise Invalid
* tininess should be detected after rounding
There is also one currently-disabled test case:
* flush-to-zero should be done after rounding
This is disabled because QEMU's emulation currently does this
incorrectly (and so would fail the test). The test case is kept in
but disabled, as the justification for why the test running harness
has support for testing both with and without FTZ set.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Link: https://lore.kernel.org/r/20250116112536.4117889-3-peter.maydell@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
In commit 8adcff4ae7 ("fpu: handle raising Invalid for infzero in
pick_nan_muladd") we changed the handling of 0 * Inf + QNaN to always
raise the Invalid exception regardless of target architecture. (This
was a change affecting hppa, i386, sh4 and tricore.) However, this
was incorrect for i386, which documents in the SDM section 14.5.2
that for the 0 * Inf + NaN case that it will only raise the Invalid
exception when the input is an SNaN. (This is permitted by the IEEE
754-2008 specification, which documents that whether we raise Invalid
for 0 * Inf + QNaN is implementation defined.)
Adjust the softfloat pick_nan_muladd code to allow the target to
suppress the raising of Invalid for the inf * zero + NaN case (as an
extra flag orthogonal to its choice for when to use the default NaN),
and enable that for x86.
We do not revert here the behaviour change for hppa, sh4 or tricore:
* The sh4 manual is clear that it should signal Invalid
* The tricore manual is a bit vague but doesn't say it shouldn't
* The hppa manual doesn't talk about fused multiply-add corner
cases at all
Cc: qemu-stable@nongnu.org
Fixes: 8adcff4ae7 (""fpu: handle raising Invalid for infzero in pick_nan_muladd")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Link: https://lore.kernel.org/r/20250116112536.4117889-2-peter.maydell@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Configure the minimum supported Rust version (though strictly speaking
that's redundant with Cargo.toml), and the list of CamelCase identifiers
that are not Rust types.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* Greg Kurz steps back as maintainer of 9pfs.
* Make multidevs=remap default option (instead of multidevs=warn)
and update documentation related to this option.
* Improve tracing (i.e. usefulness of log output content).
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Merge tag 'pull-9p-20250207' of https://github.com/cschoenebeck/qemu into staging
9pfs changes:
* Greg Kurz steps back as maintainer of 9pfs.
* Make multidevs=remap default option (instead of multidevs=warn)
and update documentation related to this option.
* Improve tracing (i.e. usefulness of log output content).
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# gpg: Signature made Fri 07 Feb 2025 04:53:05 EST
# gpg: using RSA key 96D8D110CF7AF8084F88590134C2B58765A47395
# gpg: issuer "qemu_oss@crudebyte.com"
# gpg: Good signature from "Christian Schoenebeck <qemu_oss@crudebyte.com>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: ECAB 1A45 4014 1413 BA38 4926 30DB 47C3 A012 D5F4
# Subkey fingerprint: 96D8 D110 CF7A F808 4F88 5901 34C2 B587 65A4 7395
* tag 'pull-9p-20250207' of https://github.com/cschoenebeck/qemu:
MAINTAINERS: Mark me as reviewer only for 9pfs
9pfs: improve v9fs_open() tracing
9pfs: make multidevs=remap default
9pfs: improve v9fs_walk() tracing
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
I still review 9pfs changes from time to time but I'm definitely
not able to do actual maintainer work. Drop my tree on the way
as I'll obviously not use it anymore, and it has been left
untouched since May 2020.
Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <20250115100849.259612-1-groug@kaod.org>
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Some items of Cargo.toml (readme, homepage, repository) are
only present because of clippy::cargo warnings being enabled in
rust/hw/char/pl011/src/lib.rs. But these items are not
particularly useful and would be all the same for all Cargo.toml
files in the QEMU workspace. Clean them up.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Without it, recent bindgen will give an error
error: extern block cannot be declared unsafe
if rustc is not new enough to support the "unsafe extern" construct.
Cc: qemu-rust@nongnu.org
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20250206111514.2134895-1-pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Improve tracing of 9p 'Topen' request type by showing open() flags as
human-readable text.
E.g. trace output:
v9fs_open tag 0 id 12 fid 2 mode 100352
would become:
v9fs_open tag=0 id=12 fid=2 mode=100352(RDONLY|NONBLOCK|DIRECTORY|
TMPFILE|NDELAY)
Therefor add a new utility function qemu_open_flags_tostr() that converts
numeric open() flags from host's native O_* flag constants to a string
presentation.
9p2000.L and 9p2000.u protocol variants use different numeric 'mode'
constants for 'Topen' requests. Instead of writing string conversion code
for both protocol variants, use the already existing conversion functions
that convert the mode flags from respective protocol constants to host's
native open() numeric flag constants and pass that result to the new
string conversion function qemu_open_flags_tostr().
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <E1tTgDR-000oRr-9g@kylie.crudebyte.com>
1a6ed33cc5 introduced option multidevs=remap|forbid|warn and made
"warn" the default option.
As it turned out though, e.g. by several reports in conjunction with
following 9p client issue:
850925a813
Many people are just ignoring this warning, or even do not notice the
warning at all. Therefore make multidevs=remap the new default option to
prevent people to run into such kind of severe misbehaviours in the first
place.
From performance PoV the runtime overhead of multidevs=remap is
neglectable with few or even just only one device being shared with the
same 9p export, expected to be constant Theta(1). The inode numbers
emitted to guest also just loose one bit (since 6b6aa8285d) for the 1st
device being shared.
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <09cc84e5561f66b6a8cf49b3532c6c78a6acc806.1734876877.git.qemu_oss@crudebyte.com>
'Twalk' is the most important request type in the 9p protocol to look out
for when debugging 9p communication. That's because it is the only part
of the 9p protocol which actually deals with human-readable path names,
whereas all other 9p request types work on numeric file IDs (FIDs) only.
Improve tracing of 'Twalk' requests, e.g. let's say client wanted to walk
to "/home/bob/src", then improve trace output from:
v9fs_walk tag 0 id 110 fid 0 newfid 1 nwnames 3
to:
v9fs_walk tag=0 id=110 fid=0 newfid=1 nwnames=3 wnames={home, bob, src}
To achieve this, add a new helper function trace_v9fs_walk_wnames() which
converts the received V9fsString array of individual path elements into a
comma-separated string presentation for being passed to the tracing system.
As this conversion is somewhat expensive, this conversion function is only
called if tracing of event 'v9fs_walk' is currently enabled.
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <E1tJamT-007Cqk-9E@kylie.crudebyte.com>
BLOCK_OP_TYPE_DATAPLANE prevents BlockDriverState from being used by
virtio-blk/virtio-scsi with IOThread. Commit b112a65c52 ("block:
declare blockjobs and dataplane friends!") eliminated the main reason
for this blocker in 2014.
Nowadays the block layer supports I/O from multiple AioContexts, so
there is even less reason to block IOThread users. Any legitimate
reasons related to interference would probably also apply to
non-IOThread users.
The only remaining users are bdrv_op_unblock(BLOCK_OP_TYPE_DATAPLANE)
calls after bdrv_op_block_all(). If we remove BLOCK_OP_TYPE_DATAPLANE
their behavior doesn't change.
Existing bdrv_op_block_all() callers that don't explicitly unblock
BLOCK_OP_TYPE_DATAPLANE seem to do so simply because no one bothered to
rather than because it is necessary to keep BLOCK_OP_TYPE_DATAPLANE
blocked.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20250203182529.269066-1-stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This tests different types of operations on inactive block nodes
(including graph changes, block jobs and NBD exports) to make sure that
users manually activating and inactivating nodes doesn't break things.
Support for inactive nodes in other export types will have to come with
separate test cases because they have different dependencies like blkio
or root permissions and we don't want to disable this basic test when
they are not fulfilled.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Fabiano Rosas <farosas@suse.de>
Message-ID: <20250204211407.381505-17-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
