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118851 commits

Author SHA1 Message Date
David Hildenbrand
1cceedd772 physmem: teach cpu_memory_rw_debug() to write to more memory regions
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>
2025-02-12 11:33:13 -05:00
David Hildenbrand
425ce9b37b hmp: use cpu_get_phys_page_debug() in hmp_gva2gpa()
We don't need the MemTxAttrs, so let's simply use the simpler function
variant.

Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250210084648.33798-7-david@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2025-02-12 11:33:13 -05:00
David Hildenbrand
d732b5a4ac memory: pass MemTxAttrs to memory_access_is_direct()
We want to pass another flag that will be stored in MemTxAttrs. So pass
MemTxAttrs directly.

Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250210084648.33798-6-david@redhat.com
[peterx: Fix MacOS builds]
Signed-off-by: Peter Xu <peterx@redhat.com>
2025-02-12 11:33:05 -05:00
David Hildenbrand
d4337aa8e2 physmem: disallow direct access to RAM DEVICE in address_space_write_rom()
As documented in commit 4a2e242bbb ("memory: Don't use memcpy for
ram_device regions"), we disallow direct access to RAM DEVICE regions.

This change implies that address_space_write_rom() and
cpu_memory_rw_debug() won't be able to write to RAM DEVICE regions. It
will also affect cpu_flush_icache_range(), but it's only used by
hw/core/loader.c after writing to ROM, so it is expected to not apply
here with RAM DEVICE.

This fixes direct access to these regions where we don't want direct
access. We'll extend cpu_memory_rw_debug() next to also be able to write to
these (and IO) regions.

This is a preparation for further changes.

Cc: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250210084648.33798-5-david@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2025-02-12 10:13:28 -05:00
David Hildenbrand
7fd970a7d3 physmem: factor out direct access check into memory_region_supports_direct_access()
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>
2025-02-12 10:13:27 -05:00
David Hildenbrand
e76d7b6b8c physmem: factor out RAM/ROMD check in memory_access_is_direct()
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>
2025-02-12 10:13:27 -05:00
David Hildenbrand
52012209e1 physmem: factor out memory_region_is_ram_device() check in memory_access_is_direct()
As documented in commit 4a2e242bbb ("memory: Don't use memcpy for
ram_device regions"), we disallow direct access to RAM DEVICE regions.

Let's make this clearer to prepare for further changes. Note that romd
regions will never be RAM DEVICE at the same time.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250210084648.33798-2-david@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2025-02-12 10:13:27 -05:00
William Roche
f051a9c4dc system/physmem: take into account fd_offset for file fallocate
Punching a hole in a file with fallocate needs to take into account the
fd_offset value for a correct file location.
But guest_memfd internal use doesn't currently consider fd_offset.

Fixes: 4b870dc4d0 ("hostmem-file: add offset option")

Signed-off-by: William Roche <william.roche@oracle.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250122194053.3103617-2-william.roche@oracle.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2025-02-11 16:37:05 -05:00
Stefan Hajnoczi
ffaf7f0376 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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Merge tag 'pull-10.0-testing-and-gdstub-updates-100225-1' of https://gitlab.com/stsquad/qemu into staging

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>
2025-02-10 13:26:17 -05:00
Stefan Hajnoczi
f2ec48fefd Block layer patches
- Managing inactive nodes (enables QSD migration with shared storage)
 - Fix swapped values for BLOCK_IO_ERROR 'device' and 'qom-path'
 - vpc: Read images exported from Azure correctly
 - scripts/qemu-gdb: Support coroutine dumps in coredumps
 - Minor cleanups
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Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging

Block layer patches

- Managing inactive nodes (enables QSD migration with shared storage)
- Fix swapped values for BLOCK_IO_ERROR 'device' and 'qom-path'
- vpc: Read images exported from Azure correctly
- scripts/qemu-gdb: Support coroutine dumps in coredumps
- Minor cleanups

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# 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: (25 commits)
  block: remove unused BLOCK_OP_TYPE_DATAPLANE
  iotests: Add (NBD-based) tests for inactive nodes
  iotests: Add qsd-migrate case
  iotests: Add filter_qtest()
  nbd/server: Support inactive nodes
  block/export: Add option to allow export of inactive nodes
  block: Drain nodes before inactivating them
  block/export: Don't ignore image activation error in blk_exp_add()
  block: Support inactive nodes in blk_insert_bs()
  block: Add blockdev-set-active QMP command
  block: Add option to create inactive nodes
  block: Fix crash on block_resize on inactive node
  block: Don't attach inactive child to active node
  migration/block-active: Remove global active flag
  block: Inactivate external snapshot overlays when necessary
  block: Allow inactivating already inactive nodes
  block: Add 'active' field to BlockDeviceInfo
  block-backend: Fix argument order when calling 'qapi_event_send_block_io_error()'
  scripts/qemu-gdb: Support coroutine dumps in coredumps
  scripts/qemu-gdb: Simplify fs_base fetching for coroutines
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2025-02-10 13:25:36 -05:00
Stefan Hajnoczi
4f1d018512 target-arm queue:
* Deprecate pxa2xx CPUs, iwMMXt emulation, -old-param option
  * Drop unused AArch64DecodeTable typedefs
  * Minor code cleanups
  * hw/net/cadence_gem:  Fix the mask/compare/disable-mask logic
  * linux-user: Do not define struct sched_attr if libc headers do
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Merge tag 'pull-target-arm-20250210' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
 * Deprecate pxa2xx CPUs, iwMMXt emulation, -old-param option
 * Drop unused AArch64DecodeTable typedefs
 * Minor code cleanups
 * hw/net/cadence_gem:  Fix the mask/compare/disable-mask logic
 * linux-user: Do not define struct sched_attr if libc headers do

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 # gpg:                issuer "peter.maydell@linaro.org"
 # gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [full]
 # gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [full]
 # gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [full]
 # gpg:                 aka "Peter Maydell <peter@archaic.org.uk>" [unknown]
 # Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20250210' of https://git.linaro.org/people/pmaydell/qemu-arm:
  linux-user: Do not define struct sched_attr if libc headers do
  qemu-options: Deprecate -old-param command line option
  hw/net/cadence_gem:  Fix the mask/compare/disable-mask logic
  hw/cpu/arm: Declare CPU QOM types using DEFINE_TYPES() macro
  hw/cpu/arm: Alias 'num-cpu' property on TYPE_REALVIEW_MPCORE
  hw/arm/fsl-imx7: Add local 'mpcore/gic' variables
  hw/arm/fsl-imx6ul: Add local 'mpcore/gic' variables
  hw/arm/fsl-imx6: Add local 'mpcore/gic' variables
  hw/arm/boot: Propagate vCPU to arm_load_dtb()
  target/arm: Drop unused AArch64DecodeTable typedefs
  tests/tcg/arm: Remove test-arm-iwmmxt test
  target/arm: deprecate the pxa2xx CPUs and iwMMXt emulation

Conflicts:
- The iwMMXt deprecation notice conflicted with the 32-bit host
  operating system deprecation notice. Add both notices.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2025-02-10 13:22:07 -05:00
Stefan Hajnoczi
54e91d1523 QAPI patches patches for 2025-02-10
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Merge tag 'pull-qapi-2025-02-10-v2' of https://repo.or.cz/qemu/armbru into staging

QAPI patches patches for 2025-02-10

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# gpg: Signature made Mon 10 Feb 2025 09:47:13 EST
# 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-qapi-2025-02-10-v2' of https://repo.or.cz/qemu/armbru:
  qapi: expose all schema features to code
  qapi: rename 'special_features' to 'features'
  qapi: change 'unsigned special_features' to 'uint64_t features'
  qapi: cope with feature names containing a '-'
  qapi/ui: Fix documentation of upper bound value in InputMoveEvent
  qapi: fix colon in Since tag section
  qapi: Move and rename qapi/qmp/dispatch.h to qapi/qmp-registry.h
  qapi: Move include/qapi/qmp/ to include/qobject/

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2025-02-10 10:47:31 -05:00
Stefan Hajnoczi
9c72ba3af2 * tcg/optimize: optimize TSTNE using smask and zmask
* target/i386: fix exceptions for 0 * Inf + QNaN
 * rust: cleanups to the configuration and the warnings
 * rust: add developer docs
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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

* tcg/optimize: optimize TSTNE using smask and zmask
* target/i386: fix exceptions for 0 * Inf + QNaN
* rust: cleanups to the configuration and the warnings
* rust: add developer docs

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# 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:
  rust: restrict missing_const_for_fn to qemu_api crate
  rust: pl011: use default set of lints
  tcg/optimize: optimize TSTNE using smask and zmask
  tests/tcg/x86_64/fma: Test some x86 fused-multiply-add cases
  target/i386: Do not raise Invalid for 0 * Inf + QNaN
  rust: add clippy configuration file
  rust: add docs
  rust: include rust_version in Cargo.toml
  rust: remove unnecessary Cargo.toml metadata

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2025-02-10 10:23:03 -05:00
Stefan Hajnoczi
8527126957 meson: Disallow 64-bit on 32-bit emulation
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Merge tag 'pull-tcg-20250208' of https://gitlab.com/rth7680/qemu into staging

meson: Disallow 64-bit on 32-bit emulation

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# gpg: Signature made Sat 08 Feb 2025 15:46:23 EST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* tag 'pull-tcg-20250208' of https://gitlab.com/rth7680/qemu:
  meson: Deprecate 32-bit host support
  meson: Disallow 64-bit on 32-bit emulation
  target/*: Remove TARGET_LONG_BITS from cpu-param.h
  configure: Define TARGET_LONG_BITS in configs/targets/*.mak
  gitlab-ci: Replace aarch64 with arm in cross-i686-tci build
  meson: Disallow 64-bit on 32-bit HVF/NVMM/WHPX emulation
  meson: Disallow 64-bit on 32-bit Xen emulation
  meson: Disallow 64-bit on 32-bit KVM emulation
  meson: Drop tcg as a module

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2025-02-10 10:22:10 -05:00
Daniel P. Berrangé
2ebb09f34f qapi: expose all schema features to code
This replaces use of the constants from the QapiSpecialFeatures
enum, with constants from the auto-generate QapiFeatures enum
in qapi-features.h

The 'deprecated' and 'unstable' features still have a little bit of
special handling, being force defined to be the 1st + 2nd features
in the enum, regardless of whether they're used in the schema. This
retains compatibility with common code that references the features
via the QapiSpecialFeatures constants.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250205123550.2754387-5-berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Imports tidied up with isort]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-02-10 15:45:04 +01:00
Daniel P. Berrangé
ba27dccc04 qapi: rename 'special_features' to 'features'
This updates the QAPI code generation to refer to 'features' instead
of 'special_features', in preparation for generalizing their exposure.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250205123550.2754387-4-berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Imports tidied up with isort]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-02-10 15:45:04 +01:00
Daniel P. Berrangé
696ae1ac91 qapi: change 'unsigned special_features' to 'uint64_t features'
The "special_features" field / parameter holds the subset of schema
features that are for internal code use. Specifically 'DEPRECATED'
and 'UNSTABLE'.

This special casing of internal features is going to be removed, so
prepare for that by renaming to 'features'. Using a fixed size type
is also best practice for bit fields.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250205123550.2754387-3-berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-02-10 15:45:04 +01:00
Daniel P. Berrangé
d8a22e69fe qapi: cope with feature names containing a '-'
When we shortly expose all feature names to code, it will be valid to
include a '-', which must be translated to a '_' for the enum constants.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250205123550.2754387-2-berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-02-10 15:45:04 +01:00
Zhang Boyang
208bd43335 qapi/ui: Fix documentation of upper bound value in InputMoveEvent
The upper bound of pointer position in InputMoveEvent should be 0x7fff,
according to INPUT_EVENT_ABS_MAX.

Signed-off-by: Zhang Boyang <zhangboyang.id@gmail.com>
Message-ID: <20250116104433.12114-1-zhangboyang.id@gmail.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
[Phrasing tweak squashed in]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-02-10 15:45:04 +01:00
Victor Toso
e00e0d0bd7 qapi: fix colon in Since tag section
As described in docs/devel/qapi-code-gen.rst line 998,
there should be no space between "Since" and ":".

Signed-off-by: Victor Toso <victortoso@redhat.com>
Message-ID: <20241217091504.16416-1-victortoso@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2025-02-10 15:45:04 +01:00
Daniel P. Berrangé
153b0989d8 qapi: Move and rename qapi/qmp/dispatch.h to qapi/qmp-registry.h
The general expectation is that header files should follow the same
file/path naming scheme as the corresponding source file. There are
various historical exceptions to this practice in QEMU, with one of
the most notable being the include/qapi/qmp/ directory.

include/qapi/qmp/dispatch.h corresponds mostly to qapi/qmp-registry.c.
Move and rename it to include/qapi/qmp-registry.h.

Now just qerror.h is left in include/qapi/qmp/.  Since it's deprecated
& (slowly) getting eliminated anyway, it isn't worth moving.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20241118151235.2665921-3-armbru@redhat.com>
2025-02-10 15:33:29 +01:00
Daniel P. Berrangé
407bc4bf90 qapi: Move include/qapi/qmp/ to include/qobject/
The general expectation is that header files should follow the same
file/path naming scheme as the corresponding source file. There are
various historical exceptions to this practice in QEMU, with one of
the most notable being the include/qapi/qmp/ directory. Most of the
headers there correspond to source files in qobject/.

This patch corrects most of that inconsistency by creating
include/qobject/ and moving the headers for qobject/ there.

This also fixes MAINTAINERS for include/qapi/qmp/dispatch.h:
scripts/get_maintainer.pl now reports "QAPI" instead of "No
maintainers found".

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com> #s390x
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20241118151235.2665921-2-armbru@redhat.com>
[Rebased]
2025-02-10 15:33:16 +01:00
Ilya Leoshkevich
24c61663dc tests/tcg: Add late gdbstub attach test
Add a small test to prevent regressions.
Make sure that host_interrupt_signal is not visible to the guest.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20250117001542.8290-9-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-18-alex.bennee@linaro.org>
2025-02-10 13:47:59 +00:00
Ilya Leoshkevich
628d64222e docs/user: Document the %d placeholder and suspend=n QEMU_GDB features
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20250117001542.8290-8-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-17-alex.bennee@linaro.org>
2025-02-10 13:47:59 +00:00
Ilya Leoshkevich
d156d5d1df gdbstub: Allow late attachment
Allow debugging individual processes in multi-process applications by
starting them with export QEMU_GDB=/tmp/qemu-%d.sock,suspend=n.
Currently one would have to attach to every process to ensure the app
makes progress.

In case suspend=n is not specified, the flow remains unchanged. If it
is specified, then accepting the client connection is delegated to a
thread. In the future this machinery may be reused for handling
reconnections and interruptions.

On accepting a connection, the thread schedules gdb_handlesig() on the
first CPU and wakes it up with host_interrupt_signal. Note that the
result of this gdb_handlesig() invocation is handled, as opposed to
many other existing call sites. These other call sites probably need to
be fixed separately.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20250117001542.8290-7-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-16-alex.bennee@linaro.org>
2025-02-10 13:47:59 +00:00
Ilya Leoshkevich
a33dcfe771 osdep: Introduce qemu_kill_thread()
Add a function for sending signals to individual threads. It does not make
sense on Windows, so do not provide an implementation, so that if someone
uses it by accident, they will get a linker error.

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: <20250117001542.8290-6-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-15-alex.bennee@linaro.org>
2025-02-10 13:47:59 +00:00
Ilya Leoshkevich
2b3ccf5f0d user: Introduce host_interrupt_signal
Attaching to the gdbstub of a running process requires stopping its
threads. For threads that run on a CPU, cpu_exit() is enough, but the
only way to grab attention of a thread that is stuck in a long-running
syscall is to interrupt it with a signal.

Reserve a host realtime signal for this, just like it's already done
for TARGET_SIGABRT on Linux. This may reduce the number of available
guest realtime signals by one, but this is acceptable, since there are
quite a lot of them, and it's unlikely that there are apps that need
them all.

Set signal_pending for the safe_sycall machinery to prevent invoking
the syscall. This is a lie, since we don't queue a guest signal, but
process_pending_signals() can handle the absence of pending signals.
The syscall returns with QEMU_ERESTARTSYS errno, which arranges for
the automatic restart. This is important, because it helps avoiding
disturbing poorly written guests.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20250117001542.8290-5-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-14-alex.bennee@linaro.org>
2025-02-10 13:47:59 +00:00
Ilya Leoshkevich
08916fd4b6 user: Introduce user/signal.h
gdbstub needs target_to_host_signal(), so move its declaration to a
public header.

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: <20250117001542.8290-4-iii@linux.ibm.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20250207153112.3939799-13-alex.bennee@linaro.org>
2025-02-10 13:47:59 +00:00
Ilya Leoshkevich
fccb744f41 gdbstub: Try unlinking the unix socket before binding
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>
2025-02-10 13:47:58 +00:00
Ilya Leoshkevich
9853485dd4 gdbstub: Allow the %d placeholder in the socket path
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>
2025-02-10 13:47:58 +00:00
Fabiano Rosas
43ab3fb375 tests/qtest/migration: Pick smoke tests
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>
2025-02-10 13:47:58 +00:00
Fabiano Rosas
bc2a1f1a45 tests/qtest/migration: Add --full option
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>
2025-02-10 13:47:58 +00:00
Alex Bennée
a08eac9761 Revert "util/timer: avoid deadlock when shutting down"
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>
2025-02-10 13:47:58 +00:00
Alex Bennée
14fa0e6b20 tests/qtest: tighten up the checks on clock_step
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>
2025-02-10 13:47:58 +00:00
Alex Bennée
31ef3c333d tests/qtest: rename qtest_send_prefix and roll-up into qtest_send
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>
2025-02-10 13:47:58 +00:00
Alex Bennée
1e00ebfd80 tests/qtest: simplify qtest_process_inbuf
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>
2025-02-10 13:47:58 +00:00
Alex Bennée
ff6c3b1a16 tests/qtest: don't step clock at start of npcm7xx periodic IRQ test
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>
2025-02-10 13:47:58 +00:00
Alex Bennée
059d06c8a8 tests/qtest: don't attempt to clock_step while waiting for virtio ISR
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>
2025-02-10 13:47:58 +00:00
Alex Bennée
0fa0b5edaa tests/docker: replicate the check-rust-tools-nightly CI job
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>
2025-02-10 13:47:58 +00:00
Paolo Bonzini
476d6e4c9c rust: restrict missing_const_for_fn to qemu_api crate
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>
2025-02-10 11:18:32 +01:00
Richard Henderson
6d701c9bac meson: Deprecate 32-bit host support
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>
2025-02-08 12:41:40 -08:00
Richard Henderson
acce728cbc meson: Disallow 64-bit on 32-bit emulation
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>
2025-02-08 12:41:33 -08:00
Richard Henderson
175646f641 target/*: Remove TARGET_LONG_BITS from cpu-param.h
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>
2025-02-08 12:41:33 -08:00
Richard Henderson
537600df61 configure: Define TARGET_LONG_BITS in configs/targets/*.mak
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>
2025-02-08 12:41:33 -08:00
Richard Henderson
35aae9d24c gitlab-ci: Replace aarch64 with arm in cross-i686-tci build
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>
2025-02-08 12:41:33 -08:00
Richard Henderson
83ef486aeb meson: Disallow 64-bit on 32-bit HVF/NVMM/WHPX emulation
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>
2025-02-08 12:41:22 -08:00
Richard Henderson
807a85dfc8 meson: Disallow 64-bit on 32-bit Xen emulation
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>
2025-02-08 12:40:24 -08:00
Richard Henderson
33614fa310 meson: Disallow 64-bit on 32-bit KVM emulation
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>
2025-02-08 12:40:24 -08:00
Richard Henderson
a802d5c456 meson: Drop tcg as a module
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>
2025-02-08 12:40:24 -08:00
Stefan Hajnoczi
04d3d0e9f5 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.
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQS86RI+GtKfB8BJu973ErUQojoPXwUCZ6Z1YQAKCRD3ErUQojoP
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 KOUS+DVaCd7xvSIEJtzch2zBL5jvuAw=
 =H3Wz
 -----END PGP SIGNATURE-----

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.

# -----BEGIN PGP SIGNATURE-----
#
# iHUEABYKAB0WIQS86RI+GtKfB8BJu973ErUQojoPXwUCZ6Z1YQAKCRD3ErUQojoP
# X+LvAP0dXGZDtE9Lj5SWuZZVLd/g/KIqx7cvGcRFQSnmAEvqSAD/SIUmCzjxrHfD
# KOUS+DVaCd7xvSIEJtzch2zBL5jvuAw=
# =H3Wz
# -----END PGP SIGNATURE-----
# 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>
2025-02-08 09:00:57 -05:00