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  • Anton Anton anjo
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  1. May 26, 2021
    • Peter Xu's avatar
      memory: Introduce log_sync_global() to memory listener · b87eaa9b
      Peter Xu authored 
      
Some of the memory listener may want to do log synchronization without
being able to specify a range of memory to sync but always globally.
Such a memory listener should provide this new method instead of the
log_sync() method.

Obviously we can also achieve similar thing when we put the global
sync logic into a log_sync() handler. However that's not efficient
enough because otherwise memory_global_dirty_log_sync() may do the
global sync N times, where N is the number of flat ranges in the
address space.

Make this new method be exclusive to log_sync().

Reviewed-by: default avatarDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Message-Id: <20210506160549.130416-2-peterx@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      b87eaa9b
    • Paolo Bonzini's avatar
      qtest: add a QOM object for qtest · 6ba7ada3
      Paolo Bonzini authored 
      
The qtest server right now can only be created using the -qtest
and -qtest-log options.  Allow an alternative way to create it
using "-object qtest,chardev=...,log=...".

This is part of the long term plan to make more (or all) of
QEMU configurable through QMP and preconfig mode.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      6ba7ada3
  3. May 13, 2021
  5. May 12, 2021
  7. May 10, 2021
  9. May 02, 2021
  11. Apr 01, 2021
  13. Mar 24, 2021
  15. Mar 23, 2021
  17. Mar 19, 2021
    • Markus Armbruster's avatar
      qemu-options: New -compat to set policy for deprecated interfaces · 6dd75472
      Markus Armbruster authored 
      
New option -compat lets you configure what to do when deprecated
interfaces get used.  This is intended for testing users of the
management interfaces.  It is experimental.

-compat deprecated-input=<input-policy> configures what to do when
deprecated input is received.  Input policy can be "accept" (accept
silently), or "reject" (reject the request with an error).

-compat deprecated-output=<out-policy> configures what to do when
deprecated output is sent.  Output policy can be "accept" (pass on
unchanged), or "hide" (filter out the deprecated parts).

Default is "accept".  Policies other than "accept" are implemented
later in this series.

For now, -compat covers only syntactic aspects of QMP, i.e. stuff
tagged with feature 'deprecated'.  We may want to extend it to cover
semantic aspects, CLI, and experimental features.

Note that there is no good way for management application to detect
presence of -compat: it's not visible output of query-qmp-schema or
query-command-line-options.  Tolerable, because it's meant for
testing.  If running with -compat fails, skip the test.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Message-Id: <20210318155519.1224118-3-armbru@redhat.com>
      6dd75472
    • Markus Armbruster's avatar
      hw: Replace anti-social QOM type names · e178113f
      Markus Armbruster authored 
      
Several QOM type names contain ',':

    ARM,bitband-memory
    etraxfs,pic
    etraxfs,serial
    etraxfs,timer
    fsl,imx25
    fsl,imx31
    fsl,imx6
    fsl,imx6ul
    fsl,imx7
    grlib,ahbpnp
    grlib,apbpnp
    grlib,apbuart
    grlib,gptimer
    grlib,irqmp
    qemu,register
    SUNW,bpp
    SUNW,CS4231
    SUNW,DBRI
    SUNW,DBRI.prom
    SUNW,fdtwo
    SUNW,sx
    SUNW,tcx
    xilinx,zynq_slcr
    xlnx,zynqmp
    xlnx,zynqmp-pmu-soc
    xlnx,zynq-xadc

These are all device types.  They can't be plugged with -device /
device_add, except for xlnx,zynqmp-pmu-soc, and I doubt that one
actually works.

They *can* be used with -device / device_add to request help.
Usability is poor, though: you have to double the comma, like this:

    $ qemu-system-x86_64 -device SUNW,,fdtwo,help

Trap for the unwary.  The fact that this was broken in
device-introspect-test for more than six years until commit e27bd498
fixed it demonstrates that "the unwary" includes seasoned developers.

One QOM type name contains ' ': "ICH9 SMB".  Because having to
remember just one way to quote would be too easy.

Rename the "SUNW,FOO types to "sun-FOO".  Summarily replace ',' and '
' by '-' in the other type names.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Message-Id: <20210304140229.575481-2-armbru@redhat.com>
Reviewed-by: default avatarMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      e178113f
    • Markus Armbruster's avatar
      blockdev: Drop deprecated bogus -drive interface type · fe9f70a1
      Markus Armbruster authored 
      
Drop the crap deprecated in commit a1b40bda "blockdev: Deprecate
-drive with bogus interface type" (v5.1.0).

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Reviewed-by: default avatarDaniel P. Berrangé <berrange@redhat.com>
Reviewed-by: default avatarJohn Snow <jsnow@redhat.com>
Message-id: 20210309161214.1402527-5-armbru@redhat.com
Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
      fe9f70a1
    • Paolo Bonzini's avatar
      vl: allow passing JSON to -object · 009ff893
      Paolo Bonzini authored 
      
Extend the ObjectOption code that was added in the previous patch to
enable passing JSON to -object.  Even though we cannot yet add
non-scalar properties with the human-friendly comma-separated syntax,
they can now be added as JSON.

Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Reviewed-by: default avatarKevin Wolf <kwolf@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210312173547.1283477-4-pbonzini@redhat.com>
Reviewed-by: default avatarMarkus Armbruster <armbru@redhat.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
      009ff893
    • Paolo Bonzini's avatar
      qom: move user_creatable_add_opts logic to vl.c and QAPIfy it · bc2f4fcb
      Paolo Bonzini authored 
      
Emulators are currently using OptsVisitor (via user_creatable_add_opts)
to parse the -object command line option.  This has one extra feature,
compared to keyval, which is automatic conversion of integers to lists
as well as support for lists as repeated options:

  -object memory-backend-ram,id=pc.ram,size=1048576000,host-nodes=0,policy=bind

So we cannot replace OptsVisitor with keyval right now.  Still, this
patch moves the user_creatable_add_opts logic to vl.c since it is
not needed anywhere else, and makes it go through user_creatable_add_qapi.

In order to minimize code changes, the predicate still takes a string.
This can be changed later to use the ObjectType QAPI enum directly.

Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210312173547.1283477-3-pbonzini@redhat.com>
Reviewed-by: default avatarMarkus Armbruster <armbru@redhat.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
      bc2f4fcb
  19. Mar 18, 2021
  21. Mar 16, 2021
    • Alexander Bulekov's avatar
      fuzz: move some DMA hooks · 7cac7fea
      Alexander Bulekov authored 
      
For the sparse-mem device, we want the fuzzer to populate entire DMA
reads from sparse-mem, rather than hooking into the individual MMIO
memory_region_dispatch_read operations. Otherwise, the fuzzer will treat
each sequential read separately (and populate it with a separate
pattern). Work around this by rearranging some DMA hooks. Since the
fuzzer has it's own logic to skip accidentally writing to MMIO regions,
we can call the DMA cb, outside the flatview_translate loop.

Signed-off-by: default avatarAlexander Bulekov <alxndr@bu.edu>
Reviewed-by: default avatarDarren Kenny <darren.kenny@oracle.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      7cac7fea
  23. Mar 15, 2021
    • Thomas Huth's avatar
      usb: Un-deprecate -usbdevice (except for -usbdevice audio which gets removed) · 6db34277
      Thomas Huth authored 
      
When trying to remove the -usbdevice option, there were complaints that
"-usbdevice braille" is still a very useful shortcut for some people.
Thus we never remove this option. Since it's not such a big burden to
keep it around, and it's also convenient in the sense that you don't
have to worry to enable a host controller explicitly with this option,
we should remove it from he deprecation list again.

However, there is one exception: "-usbdevice audio" should go away, since
audio devices without "audiodev=..." parameter are also on the deprecation
list and you cannot use "-usbdevice audio" with "audiodev".

Signed-off-by: default avatarThomas Huth <thuth@redhat.com>
Message-Id: <20210310173323.1422754-4-thuth@redhat.com>
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
      6db34277
    • David Hildenbrand's avatar
      exec: Get rid of phys_mem_set_alloc() · 25459eb7
      David Hildenbrand authored 
      
As the last user is gone, we can get rid of phys_mem_set_alloc() and
simplify.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Halil Pasic <pasic@linux.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
Reviewed-by: default avatarThomas Huth <thuth@redhat.com>
Reviewed-by: default avatarIgor Mammedov <imammedo@redhat.com>
Message-Id: <20210303130916.22553-3-david@redhat.com>
Signed-off-by: default avatarCornelia Huck <cohuck@redhat.com>
      25459eb7
  25. Mar 12, 2021
    • Eric Auger's avatar
      dma: Introduce dma_aligned_pow2_mask() · f14fb6c2
      Eric Auger authored 
      
Currently get_naturally_aligned_size() is used by the intel iommu
to compute the maximum invalidation range based on @size which is
a power of 2 while being aligned with the @start address and less
than the maximum range defined by @gaw.

This helper is also useful for other iommu devices (virtio-iommu,
SMMUv3) to make sure IOMMU UNMAP notifiers only are called with
power of 2 range sizes.

Let's move this latter into dma-helpers.c and rename it into
dma_aligned_pow2_mask(). Also rewrite the helper so that it
accomodates UINT64_MAX values for the size mask and max mask.
It now returns a mask instead of a size. Change the caller.

Signed-off-by: default avatarEric Auger <eric.auger@redhat.com>
Reviewed-by: default avatarPeter Xu <peterx@redhat.com>
Message-id: 20210309102742.30442-3-eric.auger@redhat.com
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
      f14fb6c2
  27. Mar 10, 2021
  29. Mar 09, 2021
  31. Mar 06, 2021
    • Alex Bennée's avatar
      accel/tcg: move CF_CLUSTER calculation to curr_cflags · c0ae396a
      Alex Bennée authored 
      
There is nothing special about this compile flag that doesn't mean we
can't just compute it with curr_cflags() which we should be using when
building a new set.

Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Message-Id: <20210224165811.11567-3-alex.bennee@linaro.org>
Signed-off-by: default avatarRichard Henderson <richard.henderson@linaro.org>
      c0ae396a
    • Paolo Bonzini's avatar
      trace: skip qemu_set_log_filename if no "-D" option was passed · 7520c4f0
      Paolo Bonzini authored 
      
When the "simple" backend is not active but the "log" backend is,
both "-trace file=" and "-D" will result in a call to
qemu_set_log_filename.  Unfortunately, QEMU was also calling
qemu_set_log_filename if "-D" was not passed, so the "-trace
file=" option had no effect and the tracepoints went back to
stderr.

Fortunately we can just skip qemu_set_log_filename in that case,
because the log backend will initialize itself just fine as soon
as qemu_set_log is called, also in qemu_process_early_options.

Cc: stefanha@redhat.com
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210209145759.141231-3-pbonzini@redhat.com>
      7520c4f0
    • Paolo Bonzini's avatar
      qemu-config: add error propagation to qemu_config_parse · f7544edc
      Paolo Bonzini authored 
      
This enables some simplification of vl.c via error_fatal, and improves
error messages.  Before:

  $ ./qemu-system-x86_64 -readconfig .
  qemu-system-x86_64: error reading file
  qemu-system-x86_64: -readconfig .: read config .: Invalid argument
  $ /usr/libexec/qemu-kvm -readconfig foo
  qemu-kvm: -readconfig foo: read config foo: No such file or directory

After:

  $ ./qemu-system-x86_64 -readconfig .
  qemu-system-x86_64: -readconfig .: Cannot read config file: Is a directory
  $ ./qemu-system-x86_64 -readconfig foo
  qemu-system-x86_64: -readconfig foo: Could not open 'foo': No such file or directory

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: default avatarMarkus Armbruster <armbru@redhat.com>
Message-Id: <20210226170816.231173-1-pbonzini@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      f7544edc
    • Daniel Henrique Barboza's avatar
      vl.c: do not execute trace_init_backends() before daemonizing · 10b6ee16
      Daniel Henrique Barboza authored 
      
Commit v5.2.0-190-g0546c0609c ("vl: split various early command line
options to a separate function") moved the trace backend init code to
the qemu_process_early_options(). Which is now being called before
os_daemonize() via qemu_maybe_daemonize().

Turns out that this change of order causes a problem when executing
QEMU in daemon mode and with CONFIG_TRACE_SIMPLE. The trace thread
is now being created by the parent, and the parent is left waiting for
a trace file flush that was registered via st_init(). The result is
that the parent process never exits.

To reproduce, fire up a QEMU process with -daemonize and with
CONFIG_TRACE_SIMPLE enabled. Two QEMU process will be left in the
host:

$ sudo ./x86_64-softmmu/qemu-system-x86_64 -S -no-user-config -nodefaults \
  -nographic -machine none,accel=kvm:tcg -daemonize

$ ps axf | grep qemu
 529710 pts/3    S+     0:00  |       \_ grep --color=auto qemu
 529697 ?        Ssl    0:00  \_ ./x86_64-softmmu/qemu-system-x86_64 -S -no-user-config -nodefaults -nographic -machine none,accel=kvm:tcg -daemonize
 529699 ?        Sl     0:00      \_ ./x86_64-softmmu/qemu-system-x86_64 -S -no-user-config -nodefaults -nographic -machine none,accel=kvm:tcg -daemonize

The parent thread is hang in flush_trace_file:

$ sudo gdb ./x86_64-softmmu/qemu-system-x86_64 529697
(..)
(gdb) bt
 #0  0x00007f9dac6a137d in syscall () at /lib64/libc.so.6
 #1  0x00007f9dacc3c4f3 in g_cond_wait () at /lib64/libglib-2.0.so.0
 #2  0x0000555d12f952da in flush_trace_file (wait=true) at ../trace/simple.c:140
 #3  0x0000555d12f95b4c in st_flush_trace_buffer () at ../trace/simple.c:383
 #4  0x00007f9dac5e43a7 in __run_exit_handlers () at /lib64/libc.so.6
 #5  0x00007f9dac5e4550 in on_exit () at /lib64/libc.so.6
 #6  0x0000555d12d454de in os_daemonize () at ../os-posix.c:255
 #7  0x0000555d12d0bd5c in qemu_maybe_daemonize (pid_file=0x0) at ../softmmu/vl.c:2408
 #8  0x0000555d12d0e566 in qemu_init (argc=8, argv=0x7fffc594d9b8, envp=0x7fffc594da00) at ../softmmu/vl.c:3459
 #9  0x0000555d128edac1 in main (argc=8, argv=0x7fffc594d9b8, envp=0x7fffc594da00) at ../softmmu/main.c:49
(gdb)

Aside from the 'zombie' process in the host, this is directly impacting
Libvirt. Libvirt waits for the parent process to exit to be sure that the
QMP monitor is available in the daemonized process to fetch QEMU
capabilities, and as is now Libvirt hangs at daemon start waiting
for the parent thread to exit.

The fix is simple: just move the trace backend related code back to
be executed after daemonizing.

Fixes: 0546c060
Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarDaniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20210105181437.538366-2-danielhb413@gmail.com>
Acked-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      10b6ee16
  33. Feb 25, 2021
    • Paolo Bonzini's avatar
      vl: deprecate -writeconfig · b979c931
      Paolo Bonzini authored 
      
The functionality of -writeconfig is limited and the code
does not even try to detect cases where it prints incorrect
syntax (for example if values have a quote in them, since
qemu_config_parse does not support any kind of escaping)
so remove it.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      b979c931