Memory pull request for 10.0
v2 changelog:
- Fix Mac (and possibly some other) build issues for two patches
- os: add an ability to lock memory on_fault
- memory: pass MemTxAttrs to memory_access_is_direct()
List of features:
- William's fix on ram hole punching when with file offset
- Daniil's patchset to introduce mem-lock=on-fault
- William's hugetlb hwpoison fix for size report & remap
- David's series to allow qemu debug writes to MMIOs
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# gpg: using EDDSA key B9184DC20CC457DACF7DD1A93B5FCCCDF3ABD706
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# gpg: aka "Peter Xu <peterx@redhat.com>" [full]
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* tag 'mem-next-pull-request' of https://gitlab.com/peterx/qemu:
overcommit: introduce mem-lock=on-fault
system: introduce a new MlockState enum
system/vl: extract overcommit option parsing into a helper
os: add an ability to lock memory on_fault
system/physmem: poisoned memory discard on reboot
system/physmem: handle hugetlb correctly in qemu_ram_remap()
physmem: teach cpu_memory_rw_debug() to write to more memory regions
hmp: use cpu_get_phys_page_debug() in hmp_gva2gpa()
memory: pass MemTxAttrs to memory_access_is_direct()
physmem: disallow direct access to RAM DEVICE in address_space_write_rom()
physmem: factor out direct access check into memory_region_supports_direct_access()
physmem: factor out RAM/ROMD check in memory_access_is_direct()
physmem: factor out memory_region_is_ram_device() check in memory_access_is_direct()
system/physmem: take into account fd_offset for file fallocate
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
For loongarch, mips, riscv and sparc, a zero register is
available all the time. For aarch64, register index 31
depends on context: sometimes it is the stack pointer,
and sometimes it is the zero register.
Introduce a new general-purpose constraint which maps 0
to TCG_REG_ZERO, if defined. This differs from existing
constant constraints in that const_arg[*] is recorded as
false, indicating that the value is in a register.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Since we no longer support 64-bit guests on 32-bit hosts,
we can use a 32-bit type on a 32-bit host. This shrinks
the size of the structure to 16 bytes on a 32-bit host.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Since we no longer support 64-bit guests on 32-bit hosts,
we can use a 32-bit type on a 32-bit host.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Since 64-on-32 is now unsupported, guest addresses always
fit in one host register. Drop the replication of opcodes.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Misc HW patches
- Use qemu_hexdump_line() in TPM backend (Philippe)
- Remove magic number in APIC (Phil)
- Disable thread-level cache topology (Zhao)
- Xen QOM style cleanups (Bernhard)
- Introduce TYPE_DYNAMIC_SYS_BUS_DEVICE (Philippe)
- Invert logic of machine no_sdcard flag (Philippe)
- Housekeeping in MicroBlaze functional tests (Philippe)
- Prevent out-of-bound access in SMC91C111 RX path (Peter)
- Declare more fields / arguments as const (Philippe)
- Introduce EndianMode QAPI enum (Philippe)
- Make various Xilinx devices endianness configurable (Philippe)
- Mark some devices memory regions as little-endian (Philippe)
- Allow execution RX gdbsim machine without BIOS/kernel (Keith)
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* tag 'hw-misc-20250216' of https://github.com/philmd/qemu: (39 commits)
hw/rx: Allow execution without either bios or kernel
hw/pci-host: Mark versatile regions as little-endian
hw/mips: Mark Loonson3 Virt machine devices as little-endian
hw/mips: Mark Boston machine devices as little-endian
hw/arm: Mark Allwinner Technology devices as little-endian
hw/ssi/xilinx_spi: Make device endianness configurable
hw/char/xilinx_uartlite: Make device endianness configurable
hw/timer/xilinx_timer: Make device endianness configurable
hw/net/xilinx_ethlite: Make device endianness configurable
hw/intc/xilinx_intc: Make device endianness configurable
hw/qdev-properties-system: Introduce EndianMode QAPI enum
hw: Make class data 'const'
hw: Declare various const data as 'const'
tests/functional: Remove sleep() kludges from microblaze tests
tests/functional: Allow microblaze tests to take a machine name argument
tests/functional: Explicit endianness of microblaze assets
hw/net/smc91c111: Ignore attempt to pop from empty RX fifo
hw/riscv/opentitan: Include missing 'exec/address-spaces.h' header
hw/boards: Ensure machine setting auto_create_sdcard expose a SD Bus
hw/riscv: Remove all invalid uses of auto_create_sdcard=true
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Invert the 'no_sdcard' logic, renaming it as the more explicit
"auto_create_sdcard". Machines are supposed to create a SD Card
drive when this flag is set. In many cases it doesn't make much
sense (as boards don't expose SD Card host controller), but this
is patch only aims to expose that nonsense; so no logical change
intended (mechanical patch using gsed).
Most of the changes are:
- mc->no_sdcard = ON_OFF_AUTO_OFF;
+ mc->auto_create_sdcard = true;
Except in
. hw/core/null-machine.c
. hw/arm/xilinx_zynq.c
. hw/s390x/s390-virtio-ccw.c
where the disabled option is manually removed (since default):
- mc->no_sdcard = ON_OFF_AUTO_ON;
+ mc->auto_create_sdcard = false;
- mc->auto_create_sdcard = false;
and in system/vl.c we change the 'default_sdcard' type to boolean.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20250204200934.65279-4-philmd@linaro.org>
MachineClass::no_sdcard is initialized as false by default.
To catch all uses, convert it to a tri-state, having the
current default (false) becoming AUTO.
No logical change intended.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20250204200934.65279-2-philmd@linaro.org>
Because the legacy Xen backend devices can optionally be plugged on the
TYPE_PLATFORM_BUS_DEVICE, have it inherit TYPE_DYNAMIC_SYS_BUS_DEVICE.
Remove the implicit TYPE_XENSYSDEV instance_size.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alexander Graf <graf@amazon.com>
Tested-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20250125181343.59151-10-philmd@linaro.org>
Some TYPE_SYS_BUS_DEVICEs can be optionally dynamically
plugged on the TYPE_PLATFORM_BUS_DEVICE.
Rather than sometimes noting that with comment around
the 'user_creatable = true' line in each DeviceRealize
handler, introduce an abstract TYPE_DYNAMIC_SYS_BUS_DEVICE
class.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alexander Graf <graf@amazon.com>
Reviewed-by: Clément Mathieu--Drif <clement.mathieu--drif@eviden.com>
Message-Id: <20250125181343.59151-4-philmd@linaro.org>
Add a read flag that can inform a channel that it's ok to receive an
EOF at any moment. Channels that have some form of strict EOF
tracking, such as TLS session termination, may choose to ignore EOF
errors with the use of this flag.
This is being added for compatibility with older migration streams
that do not include a TLS termination step.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
We want to pass flags into qio_channel_tls_readv() but
qio_channel_readv_full_all_eof() doesn't take a flags argument.
No functional change.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
The correct way of calling qcrypto_tls_session_handshake() requires
calling qcrypto_tls_session_get_handshake_status() right after it so
there's no reason to have a separate method.
Refactor qcrypto_tls_session_handshake() to inform the status in its
own return value and alter the callers accordingly.
No functional change.
Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Add a task dispatcher for gnutls_bye similar to the
qio_channel_tls_handshake_task(). The gnutls_bye() call might be
interrupted and so it needs to be rescheduled.
The migration code will make use of this to help the migration
destination identify a premature EOF. Once the session termination is
in place, any EOF that happens before the source issued gnutls_bye()
will be considered an error.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
QEMU's TLS session code provides no way to call gnutls_bye() to
terminate a TLS session. Callers of qcrypto_tls_session_read() can
choose to ignore a GNUTLS_E_PREMATURE_TERMINATION error by setting the
gracefulTermination argument.
The QIOChannelTLS ignores the premature termination error whenever
shutdown() has already been issued. This was found to be not enough for
the migration code because shutdown() might not have been issued before
the connection is terminated.
Add support for calling gnutls_bye() in the tlssession layer so users
of QIOChannelTLS can clearly identify the end of a TLS session.
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
There was not mention QEMUTimer created with timer_new*() must
be released with timer_free() instead of g_free(), because then
active timers are removed from the active list. Update the
documentation mentioning timer_free().
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
HPET device needs to access and update hpet_cfg variable, but now it is
defined in hw/i386/fw_cfg.c and Rust code can't access it.
Move hpet_cfg definition to hpet.c (and rename it to hpet_fw_cfg). This
allows Rust HPET device implements its own global hpet_fw_cfg variable,
and will further reduce the use of unsafe C code access and calls in the
Rust HPET implementation.
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250210030051.2562726-2-zhao1.liu@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Locking the memory without MCL_ONFAULT instantly prefaults any mmaped
anonymous memory with a write-fault, which introduces a lot of extra
overhead in terms of memory usage when all you want to do is to prevent
kcompactd from migrating and compacting QEMU pages. Add an option to
only lock pages lazily as they're faulted by the process by using
MCL_ONFAULT if asked.
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Link: https://lore.kernel.org/r/20250212143920.1269754-5-d-tatianin@yandex-team.ru
Signed-off-by: Peter Xu <peterx@redhat.com>
Right now, we only allow for writing to memory regions that allow direct
access using memcpy etc; all other writes are simply ignored. This
implies that debugging guests will not work as expected when writing
to MMIO device regions.
Let's extend cpu_memory_rw_debug() to write to more memory regions,
including MMIO device regions. Reshuffle the condition in
memory_access_is_direct() to make it easier to read and add a comment.
While this change implies that debug access can now also write to MMIO
devices, we now are also permit ELF image loads and similar users of
cpu_memory_rw_debug() to write to MMIO devices; currently we ignore
these writes.
Peter assumes [1] that there's probably a class of guest images, which
will start writing junk (likely zeroes) into device model registers; we
previously would silently ignore any such bogus ELF sections. Likely
these images are of questionable correctness and this can be ignored. If
ever a problem, we could make these cases use address_space_write_rom()
instead, which is left unchanged for now.
This patch is based on previous work by Stefan Zabka.
[1] https://lore.kernel.org/all/CAFEAcA_2CEJKFyjvbwmpt=on=GgMVamQ5hiiVt+zUr6AY3X=Xg@mail.gmail.com/
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/213
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250210084648.33798-8-david@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Let's factor the complete "directly accessible" check independent of
the "write" condition out so we can reuse it next.
We can now split up the checks RAM and ROMD check, so we really only check
for RAM DEVICE in case of RAM -- ROM DEVICE is neither RAM not RAM DEVICE.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250210084648.33798-4-david@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Let's factor more of the generic "is this directly accessible" check,
independent of the "write" condition out.
Note that the "!mr->rom_device" check in the write case essentially
disallows the memory_region_is_romd() condition again. Further note that
RAM DEVICE regions are also RAM regions, so we can check for RAM+ROMD
first.
This is a preparation for further changes.
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250210084648.33798-3-david@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
loongarch queue
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* tag 'pull-loongarch-20250212' of https://gitlab.com/bibo-mao/qemu:
hw/loongarch/virt: CPU irq line connection improvement
hw/loongarch/virt: Remove unused ipistate
hw/loongarch/virt: Set iocsr address space when CPU is created
hw/loongarch/virt: Add separate file for fdt building
hw/loongarch/virt: Rename function prefix name
hw/loongarch/virt: Rename filename acpi-build with virt-acpi-build
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Interrupt controller extioi and ipi connect to CPU with irq line method.
With command -smp x, -device la464-loongarch-cpu, smp.cpus is not
accurate for all possible CPU objects, possible_cpu_arch_ids() is used.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Similiar with virt-acpi-build.c, file virt-fdt-build.c is added here.
And move functions relative with fdt table building to the file.
It is only code movement and there is no function change.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Replace function prefix name loongarch_xxx with virt_xxx in file
virt-acpi-build.c
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Although defaulting the handshake limit to 10 seconds was a nice QoI
change to weed out intentionally slow clients, it can interfere with
integration testing done with manual NBD_OPT commands over 'nbdsh
--opt-mode'. Expose a QMP knob 'handshake-max-secs' to allow the user
to alter the timeout away from the default.
The parameter name here intentionally matches the spelling of the
constant added in commit fb1c2aaa98, and not the command-line spelling
added in the previous patch for qemu-nbd; that's because in QMP,
longer names serve as good self-documentation, and unlike the command
line, machines don't have problems generating longer spellings.
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-ID: <20250203222722.650694-6-eblake@redhat.com>
[eblake: s/max-secs/max-seconds/ in QMP]
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Currently we handle flushing of output denormals in uncanon_normal
always before we deal with rounding. This works for architectures
that detect tininess before rounding, but is usually not the right
place when the architecture detects tininess after rounding. For
example, for x86 the SDM states that the MXCSR FTZ control bit causes
outputs to be flushed to zero "when it detects a floating-point
underflow condition". This means that we mustn't flush to zero if
the input is such that after rounding it is no longer tiny.
At least one of our guest architectures does underflow detection
after rounding but flushing of denormals before rounding (MIPS MSA);
this means we need to have a config knob for this that is separate
from our existing tininess_before_rounding setting.
Add an ftz_detection flag. For consistency with
tininess_before_rounding, we make it default to "detect ftz after
rounding"; this means that we need to explicitly set the flag to
"detect ftz before rounding" on every existing architecture that sets
flush_to_zero, so that this commit has no behaviour change.
(This means more code change here but for the long term a less
confusing API.)
For several architectures the current behaviour is either
definitely or possibly wrong; annotate those with TODO comments.
These architectures are definitely wrong (and should detect
ftz after rounding):
* x86
* Alpha
For these architectures the spec is unclear:
* MIPS (for non-MSA)
* RX
* SH4
PA-RISC makes ftz detection IMPDEF, but we aren't setting the
"tininess before rounding" setting that we ought to.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
For the x86 and the Arm FEAT_AFP semantics, we need to be able to
tell the target code that the FPU operation has used an input
denormal. Implement this; when it happens we set the new
float_flag_denormal_input_used.
Note that we only set this when an input denormal is actually used by
the operation: if the operation results in Invalid Operation or
Divide By Zero or the result is a NaN because some other input was a
NaN then we never needed to look at the input denormal and do not set
denormal_input_used.
We mostly do not need to adjust the hardfloat codepaths to deal with
this flag, because almost all hardfloat operations are already gated
on the input not being a denormal, and will fall back to softfloat
for a denormal input. The only exception is the comparison
operations, where we need to add the check for input denormals, which
must now fall back to softfloat where they did not before.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Depending on the configuration of the host and VM, a passthrough
device may generate recurring DMA mapping errors at runtime. In such
cases, reporting the issue once is sufficient.
We have already the warn/error_report_once() routines taking a format
and arguments. Using the same design pattern, add a new warning
variant taking an 'Error *' parameter.
Cc: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250206131438.1505542-2-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
testing and gdbstub updates:
- add a check-rust test to docker builds
- re-factor the qtest logic to be cleaner
- fix tests to not clock_step when no timers enabled
- roll-up log prefix into qtest_send
- cleaner error reporting when qtest_clock_set fails
- revert old deadlock fix now tests are updated
- only run full set of migration tests under HW acceleration
- support late attachment to user-mode gdbstubs
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# gpg: Signature made Mon 10 Feb 2025 08:54:51 EST
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.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: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* tag 'pull-10.0-testing-and-gdstub-updates-100225-1' of https://gitlab.com/stsquad/qemu:
tests/tcg: Add late gdbstub attach test
docs/user: Document the %d placeholder and suspend=n QEMU_GDB features
gdbstub: Allow late attachment
osdep: Introduce qemu_kill_thread()
user: Introduce host_interrupt_signal
user: Introduce user/signal.h
gdbstub: Try unlinking the unix socket before binding
gdbstub: Allow the %d placeholder in the socket path
tests/qtest/migration: Pick smoke tests
tests/qtest/migration: Add --full option
Revert "util/timer: avoid deadlock when shutting down"
tests/qtest: tighten up the checks on clock_step
tests/qtest: rename qtest_send_prefix and roll-up into qtest_send
tests/qtest: simplify qtest_process_inbuf
tests/qtest: don't step clock at start of npcm7xx periodic IRQ test
tests/qtest: don't attempt to clock_step while waiting for virtio ISR
tests/docker: replicate the check-rust-tools-nightly CI job
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Hao Wu