Commit Graph

110489 Commits

Author SHA1 Message Date
Philippe Mathieu-Daudé
63b4c714ab mailmap: Fix Stefan Weil email
Commit 5204b499a6 ("mailmap: Fix Stefan Weil author email")
corrected authorship for patch received at qemu-devel@nongnu.org,
correct now for patch received at qemu-trivial@nongnu.org.

Update other authorship email for Stefan's commits.

Suggested-by: Stefan Weil <sw@weilnetz.de>
Fixes: d819fc9516 ("virtio-blk: Fix potential nullptr read access")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2024-01-30 21:20:20 +03:00
Yihuan Pan
db101376af qemu-docs: Update options for graphical frontends
The command line options `-ctrl-grab` and `-alt-grab` have been removed
in QEMU 7.1. Instead, use the `-display sdl,grab-mod=<modifiers>` option
to specify the grab modifiers.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2103
Signed-off-by: Yihuan Pan <xun794@gmail.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2024-01-30 21:20:20 +03:00
Han Han
dee70f51bf qapi/migration.json: Fix the member name for MigrationCapability
s/@compression/@compress/

Fixes: 864128df46

Signed-off-by: Han Han <hhan@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2024-01-30 21:20:20 +03:00
Michael Tokarev
7aa94e591f colo: examples: remove mentions of script= and (wrong) downscript=
There's no need to repeat script=/etc/qemu-ifup in examples,
as it is already in there.  More, all examples uses incorrect
"down script=" (which should be "downscript=").

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Zhang Chen <chen.zhang@intel.com>
2024-01-30 21:20:20 +03:00
Markus Armbruster
e999bea8e6 dump: Fix HMP dump-guest-memory -z without -R
-z without -R has no effect: the dump format remains @elf.  Fix the
logic error so it becomes @kdump-zlib.

Fixes: e6549197f7 (dump: Add command interface for kdump-raw formats)
Fixes: CID 1523841
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stephen Brennan <stephen.s.brennan@oracle.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2024-01-30 21:20:20 +03:00
Peter Maydell
bd2e12310b qga-pull-2024-01-30
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Merge tag 'qga-pull-2024-01-30' of https://github.com/kostyanf14/qemu into staging

qga-pull-2024-01-30

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* tag 'qga-pull-2024-01-30' of https://github.com/kostyanf14/qemu:
  qga: Solaris has net/if_arp.h and netinet/if_ether.h but not ETHER_ADDR_LEN
  qga-win: Fix guest-get-fsinfo multi-disks collection
  tests/unit/test-qga: do not qualify executable paths
  guest-agent: improve help for --allow-rpcs and --block-rpcs

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-01-30 15:53:46 +00:00
Peter Maydell
1c8e621f09 linux-user: Allow gdbstub to ignore page protection
cpu-exec: simplify jump cache management
 include/exec: Cleanups toward building accel/tcg once
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Merge tag 'pull-tcg-20240130' of https://gitlab.com/rth7680/qemu into staging

linux-user: Allow gdbstub to ignore page protection
cpu-exec: simplify jump cache management
include/exec: Cleanups toward building accel/tcg once

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* tag 'pull-tcg-20240130' of https://gitlab.com/rth7680/qemu: (31 commits)
  target/i386: Extract x86_cpu_exec_halt() from accel/tcg/
  accel/tcg: Introduce TCGCPUOps::cpu_exec_halt() handler
  accel/tcg: Inline need_replay_interrupt
  target/i386: Extract x86_need_replay_interrupt() from accel/tcg/
  accel/tcg: Introduce TCGCPUOps::need_replay_interrupt() handler
  accel/tcg: Use CPUState.cc instead of CPU_GET_CLASS in cpu-exec.c
  target/loongarch: Constify loongarch_tcg_ops
  include/qemu: Add TCGCPUOps typedef to typedefs.h
  accel/tcg: Un-inline icount_exit_request() for clarity
  accel/tcg: Rename tcg_cpus_exec() -> tcg_cpu_exec()
  accel/tcg: Rename tcg_cpus_destroy() -> tcg_cpu_destroy()
  accel/tcg: Rename tcg_ss[] -> tcg_specific_ss[] in meson
  accel/tcg: Move perf and debuginfo support to tcg/
  accel/tcg: Remove #ifdef TARGET_I386 from perf.c
  tcg: Make tb_cflags() usable from target-agnostic code
  accel/tcg: Make use of qemu_target_page_mask() in perf.c
  target: Make qemu_target_page_mask() available for *-user
  accel/tcg/cpu-exec: Use RCU_READ_LOCK_GUARD
  tests/tcg: Add the PROT_NONE gdbstub test
  tests/tcg: Factor out gdbstub test functions
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-01-30 15:53:37 +00:00
Nick Briggs
b3e0f64487 qga: Solaris has net/if_arp.h and netinet/if_ether.h but not ETHER_ADDR_LEN
Solaris has net/if_arp.h and netinet/if_ether.h rather than net/ethernet.h,
but does not define ETHER_ADDR_LEN, instead providing ETHERADDRL.

Signed-off-by: Nick Briggs <nicholas.h.briggs@gmail.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
2024-01-30 12:14:28 +02:00
Peng Ji
7c4486350a qga-win: Fix guest-get-fsinfo multi-disks collection
When a volume has more than one disk, all disks cannot be
returned correctly because there is not enough malloced memory
for disk extents, so before executing DeviceIoControl for the
second time, get the correct size of the required memory space
to store all disk extents.

Details:
https://learn.microsoft.com/en-us/windows/win32/api/winioctl/ns-winioctl-volume_disk_extents

Signed-off-by: Peng Ji <peng.ji@smartx.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
2024-01-30 12:14:11 +02:00
Samuel Tardieu
8c72e19bfd tests/unit/test-qga: do not qualify executable paths
guest-exec invocation does not need the full path of the executable to
execute. Using only the command names ensures correct execution of the
test on systems not adhering to the FHS.

Signed-off-by: Samuel Tardieu <sam@rfc1149.net>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: "Daniel P. Berrangé" <berrange@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
2024-01-30 12:11:35 +02:00
Angel M. Villegas
b68d8b677e guest-agent: improve help for --allow-rpcs and --block-rpcs
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1757

Updates to qga help output and documentation for --allow-rpcs and --blocks-rpcs

Signed-off-by: "Angel M. Villegas" <anvilleg@cisco.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
2024-01-30 12:10:37 +02:00
Philippe Mathieu-Daudé
ec1d32af12 target/i386: Extract x86_cpu_exec_halt() from accel/tcg/
Move this x86-specific code out of the generic accel/tcg/.

Reported-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240124101639.30056-10-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
aa6fb65746 accel/tcg: Introduce TCGCPUOps::cpu_exec_halt() handler
In order to make accel/tcg/ target agnostic,
introduce the cpu_exec_halt() handler.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240124101639.30056-9-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Richard Henderson
b7e9a4a9b0 accel/tcg: Inline need_replay_interrupt
The function is now trivial, and with inlining we can
re-use the calling function's tcg_ops variable.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
6ae754815f target/i386: Extract x86_need_replay_interrupt() from accel/tcg/
Move this x86-specific code out of the generic accel/tcg/.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240124101639.30056-8-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
0fdc69b76e accel/tcg: Introduce TCGCPUOps::need_replay_interrupt() handler
In order to make accel/tcg/ target agnostic,
introduce the need_replay_interrupt() handler.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Message-Id: <20240124101639.30056-7-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Richard Henderson
991bd65ddd accel/tcg: Use CPUState.cc instead of CPU_GET_CLASS in cpu-exec.c
CPU_GET_CLASS does runtime type checking; use the cached
copy of the class instead.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Richard Henderson
2889fb8bd2 target/loongarch: Constify loongarch_tcg_ops
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Richard Henderson
1764ad70ce include/qemu: Add TCGCPUOps typedef to typedefs.h
QEMU coding style recommends using structure typedefs.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
93c6091bfa accel/tcg: Un-inline icount_exit_request() for clarity
Convert packed logic to dumb icount_exit_request() helper.
No functional change intended.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20240124101639.30056-5-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
f4cf2ef93f accel/tcg: Rename tcg_cpus_exec() -> tcg_cpu_exec()
tcg_cpus_exec() operates on a single vCPU, rename it
as 'tcg_cpu_exec'.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20240124101639.30056-4-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
cca2f62e74 accel/tcg: Rename tcg_cpus_destroy() -> tcg_cpu_destroy()
tcg_cpus_destroy() operates on a single vCPU, rename it
as 'tcg_cpu_destroy'.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240124101639.30056-3-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
29c0e6836f accel/tcg: Rename tcg_ss[] -> tcg_specific_ss[] in meson
tcg_ss[] source set contains target-specific units.
Rename it as 'tcg_specific_ss[]' for clarity.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20240124101639.30056-2-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Ilya Leoshkevich
327b75a469 accel/tcg: Move perf and debuginfo support to tcg/
tcg/ should not depend on accel/tcg/, but perf and debuginfo
support provided by the latter are being used by tcg/tcg.c.

Since that's the only user, move both to tcg/.

Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20231212003837.64090-5-iii@linux.ibm.com>
Message-Id: <20240125054631.78867-5-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Ilya Leoshkevich
ad66ac2b3a accel/tcg: Remove #ifdef TARGET_I386 from perf.c
Preparation for moving perf.c to tcg/.

This affects only profiling guest code, which has code in a non-0 based
segment, e.g., 16-bit code, which is not particularly important.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20231212003837.64090-4-iii@linux.ibm.com>
Message-Id: <20240125054631.78867-4-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Ilya Leoshkevich
88d4b5138a tcg: Make tb_cflags() usable from target-agnostic code
Currently tb_cflags() is defined in exec-all.h, which is not usable
from target-agnostic code. Move it to translation-block.h, which is.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20231212003837.64090-3-iii@linux.ibm.com>
Message-Id: <20240125054631.78867-3-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Ilya Leoshkevich
8a6a9ab6e5 accel/tcg: Make use of qemu_target_page_mask() in perf.c
Stop using TARGET_PAGE_MASK in order to make perf.c more
target-agnostic.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231212003837.64090-2-iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240125054631.78867-2-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Ilya Leoshkevich
f3d57a8200 target: Make qemu_target_page_mask() available for *-user
Currently qemu_target_page_mask() is usable only from the softmmu
code. Make it possible to use it from the *-user code as well.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-ID: <20231208003754.3688038-2-iii@linux.ibm.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240124075609.14756-2-philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[rth: Split out change to accel/tcg/perf.c]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Philippe Mathieu-Daudé
f5e9362af1 accel/tcg/cpu-exec: Use RCU_READ_LOCK_GUARD
Replace the manual rcu_read_(un)lock calls in cpu_exec().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20240124074201.8239-2-philmd@linaro.org>
[rth: Use RCU_READ_LOCK_GUARD not WITH_RCU_READ_LOCK_GUARD]
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 21:04:10 +10:00
Peter Maydell
11be70677c vfio queue:
* Array type cleanup
 * Fix for IRQ enablement
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Merge tag 'pull-vfio-20240129' of https://github.com/legoater/qemu into staging

vfio queue:

* Array type cleanup
* Fix for IRQ enablement

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# gpg: Signature made Mon 29 Jan 2024 07:37:40 GMT
# gpg:                using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
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* tag 'pull-vfio-20240129' of https://github.com/legoater/qemu:
  vfio/pci: Clear MSI-X IRQ index always
  vfio: use matching sizeof type

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-01-29 10:53:56 +00:00
Peter Maydell
e7390150e7 Migration Pull
[dropped fabiano's patch on modifying cpu model for arm migration tests for
  now]
 
 - Fabiano's patchset to fix migration state references in BHs
 - Fabiano's new 'n-1' migration test for CI
 - Het's fix on making "uri" optional in QMP migrate cmd
 - Markus's HMP leak fix reported by Coverity
 - Paolo's cleanup on uffd to replace u64 usage
 - Peter's small migration cleanup series all over the places
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Merge tag 'migration-20240126-pull-request' of https://gitlab.com/peterx/qemu into staging

Migration Pull

[dropped fabiano's patch on modifying cpu model for arm migration tests for
 now]

- Fabiano's patchset to fix migration state references in BHs
- Fabiano's new 'n-1' migration test for CI
- Het's fix on making "uri" optional in QMP migrate cmd
- Markus's HMP leak fix reported by Coverity
- Paolo's cleanup on uffd to replace u64 usage
- Peter's small migration cleanup series all over the places

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# gpg: Signature made Mon 29 Jan 2024 03:03:20 GMT
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* tag 'migration-20240126-pull-request' of https://gitlab.com/peterx/qemu:
  Make 'uri' optional for migrate QAPI
  migration: Centralize BH creation and dispatch
  migration: Add a wrapper to qemu_bh_schedule
  migration: Reference migration state around loadvm_postcopy_handle_run_bh
  migration: Take reference to migration state around bg_migration_vm_start_bh
  migration: Fix use-after-free of migration state object
  migration/yank: Use channel features
  ci: Disable migration compatibility tests for aarch64
  ci: Add a migration compatibility test job
  analyze-migration.py: Remove trick on parsing ramblocks
  migration: Drop unnecessary check in ram's pending_exact()
  migration: Make threshold_size an uint64_t
  migration: Plug memory leak on HMP migrate error path
  userfaultfd: use 1ULL to build ioctl masks

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-01-29 10:53:42 +00:00
Ilya Leoshkevich
82607a73f8 tests/tcg: Add the PROT_NONE gdbstub test
Make sure that qemu gdbstub, like gdbserver, allows reading from and
writing to PROT_NONE pages.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240129093410.3151-4-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 20:48:49 +10:00
Ilya Leoshkevich
4d48c1bc07 tests/tcg: Factor out gdbstub test functions
Both the report() function as well as the initial gdbstub test sequence
are copy-pasted into ~10 files with slight modifications. This
indicates that they are indeed generic, so factor them out. While
at it, add a few newlines to make the formatting closer to PEP-8.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240129093410.3151-3-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 20:48:49 +10:00
Ilya Leoshkevich
87ab270429 linux-user: Allow gdbstub to ignore page protection
gdbserver ignores page protection by virtue of using /proc/$pid/mem.
Teach qemu gdbstub to do this too. This will not work if /proc is not
mounted; accept this limitation.

One alternative is to temporarily grant the missing PROT_* bit, but
this is inherently racy. Another alternative is self-debugging with
ptrace(POKE), which will break if QEMU itself is being debugged - a
much more severe limitation.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20240129093410.3151-2-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-29 20:48:49 +10:00
Cédric Le Goater
d2b668fca5 vfio/pci: Clear MSI-X IRQ index always
When doing device assignment of a physical device, MSI-X can be
enabled with no vectors enabled and this sets the IRQ index to
VFIO_PCI_MSIX_IRQ_INDEX. However, when MSI-X is disabled, the IRQ
index is left untouched if no vectors are in use. Then, when INTx
is enabled, the IRQ index value is considered incompatible (set to
MSI-X) and VFIO_DEVICE_SET_IRQS fails. QEMU complains with :

qemu-system-x86_64: vfio 0000:08:00.0: Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure: Invalid argument

To avoid that, unconditionaly clear the IRQ index when MSI-X is
disabled.

Buglink: https://issues.redhat.com/browse/RHEL-21293
Fixes: 5ebffa4e87 ("vfio/pci: use an invalid fd to enable MSI-X")
Cc: Jing Liu <jing2.liu@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
2024-01-29 08:26:25 +01:00
Paolo Bonzini
850051b94b vfio: use matching sizeof type
Do not use uint64_t for the type of the declaration and __u64 when
computing the number of elements in the array.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-01-29 08:26:25 +01:00
Het Gala
57fd4b4e10 Make 'uri' optional for migrate QAPI
'uri' argument should be optional, as 'uri' and 'channels'
arguments are mutally exclusive in nature.

Fixes: 074dbce5fc (migration: New migrate and migrate-incoming argument 'channels')
Signed-off-by: Het Gala <het.gala@nutanix.com>
Link: https://lore.kernel.org/r/20240123064219.40514-1-het.gala@nutanix.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
44d0d456d7 migration: Centralize BH creation and dispatch
Now that the migration state reference counting is correct, further
wrap the bottom half dispatch process to avoid future issues.

Move BH creation and scheduling together and wrap the dispatch with an
intermediary function that will ensure we always keep the ref/unref
balanced.

Also move the responsibility of deleting the BH into the wrapper and
remove the now unnecessary pointers.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240119233922.32588-6-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
699d9476a0 migration: Add a wrapper to qemu_bh_schedule
Wrap qemu_bh_schedule() to ensure we always hold a reference to the
current_migration object.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240119233922.32588-5-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
9cf268965d migration: Reference migration state around loadvm_postcopy_handle_run_bh
We need to hold a reference to the current_migration object around
async calls to avoid it been freed while still in use. Even on this
load-side function, we might still use the MigrationState, e.g to
check for capabilities.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240119233922.32588-4-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
59094cfa7a migration: Take reference to migration state around bg_migration_vm_start_bh
We need to hold a reference to the current_migration object around
async calls to avoid it been freed while still in use.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240119233922.32588-3-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
27eb8499ed migration: Fix use-after-free of migration state object
We're currently allowing the process_incoming_migration_bh bottom-half
to run without holding a reference to the 'current_migration' object,
which leads to a segmentation fault if the BH is still live after
migration_shutdown() has dropped the last reference to
current_migration.

In my system the bug manifests as migrate_multifd() returning true
when it shouldn't and multifd_load_shutdown() calling
multifd_recv_terminate_threads() which crashes due to an uninitialized
multifd_recv_state.

Fix the issue by holding a reference to the object when scheduling the
BH and dropping it before returning from the BH. The same is already
done for the cleanup_bh at migrate_fd_cleanup_schedule().

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1969
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240119233922.32588-2-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
0a5d1108ab migration/yank: Use channel features
Stop using outside knowledge about the io channels when registering
yank functions. Query for features instead.

The yank method for all channels used with migration code currently is
to call the qio_channel_shutdown() function, so query for
QIO_CHANNEL_FEATURE_SHUTDOWN. We could add a separate feature in the
future for indicating whether a channel supports yanking, but that
seems overkill at the moment.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20230911171320.24372-9-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
079687e418 ci: Disable migration compatibility tests for aarch64
Until 9.0 is out, we need to keep the aarch64 job disabled because the
tests always use the n-1 version of migration-test. That happens to be
broken for aarch64 in 8.2. Once 9.0 is out, it will become the n-1
version and it will bring the fixed tests.

We can revert this patch when 9.0 releases.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240118164951.30350-4-farosas@suse.de
[peterx: use _SKIPPED rather than _OPTIONAL]
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Fabiano Rosas
94766edb35 ci: Add a migration compatibility test job
The migration tests have support for being passed two QEMU binaries to
test migration compatibility.

Add a CI job that builds the lastest release of QEMU and another job
that uses that version plus an already present build of the current
version and run the migration tests with the two, both as source and
destination. I.e.:

 old QEMU (n-1) -> current QEMU (development tree)
 current QEMU (development tree) -> old QEMU (n-1)

The purpose of this CI job is to ensure the code we're about to merge
will not cause a migration compatibility problem when migrating the
next release (which will contain that code) to/from the previous
release.

The version of migration-test used will be the one matching the older
QEMU. That way we can avoid special-casing new tests that wouldn't be
compatible with the older QEMU.

Note: for user forks, the version tags need to be pushed to gitlab
otherwise it won't be able to checkout a different version.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240118164951.30350-3-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Peter Xu
434b8adcf3 analyze-migration.py: Remove trick on parsing ramblocks
RAM_SAVE_FLAG_MEM_SIZE contains the total length of ramblock idstr to know
whether scanning of ramblocks is complete.  Drop the trick.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240117075848.139045-4-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Peter Xu
b0504edd40 migration: Drop unnecessary check in ram's pending_exact()
When the migration frameworks fetches the exact pending sizes, it means
this check:

  remaining_size < s->threshold_size

Must have been done already, actually at migration_iteration_run():

    if (must_precopy <= s->threshold_size) {
        qemu_savevm_state_pending_exact(&must_precopy, &can_postcopy);

That should be after one round of ram_state_pending_estimate().  It makes
the 2nd check meaningless and can be dropped.

To say it in another way, when reaching ->state_pending_exact(), we
unconditionally sync dirty bits for precopy.

Then we can drop migrate_get_current() there too.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240117075848.139045-3-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Peter Xu
a8629e0c2f migration: Make threshold_size an uint64_t
It's always used to compare against another uint64_t.  Make it always clear
that it's never a negative.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240117075848.139045-2-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Markus Armbruster
918f620d30 migration: Plug memory leak on HMP migrate error path
hmp_migrate() leaks @caps when qmp_migrate() fails.  Plug the leak
with g_autoptr().

Fixes: 967f2de5c9 (migration: Implement MigrateChannelList to hmp migration flow.) v8.2.0-rc0
Fixes: CID 1533125
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Link: https://lore.kernel.org/r/20240117140722.3979657-1-armbru@redhat.com
[peterx: fix CID number as reported by Peter Maydell]
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00
Paolo Bonzini
73b4987858 userfaultfd: use 1ULL to build ioctl masks
There is no need to use the Linux-internal __u64 type, 1ULL is
guaranteed to be wide enough.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/r/20240117160313.175609-1-pbonzini@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
2024-01-29 11:02:12 +08:00