Skip to content

Q
qemu

openeuler / qemu

通知 10
Star 0
Fork 0
Q
qemu
切换分支/标签
  1. 28 4月, 2015 16 次提交
  3. 26 4月, 2015 1 次提交
  5. 24 4月, 2015 1 次提交
  7. 21 4月, 2015 1 次提交
  9. 20 4月, 2015 1 次提交
  11. 17 4月, 2015 5 次提交
  13. 14 4月, 2015 2 次提交
  15. 13 4月, 2015 3 次提交
    • P
      Revert seccomp tests that allow it to be used on non-x86 architectures · ae6e8ef1
      由 Peter Maydell 提交于 
      Unfortunately it turns out that libseccomp 2.2 still does not work
correctly on non-x86 architectures; return to the previous configure
setup of insisting on libseccomp 2.1 or better and i386/x86_64 and
disabling seccomp support in all other situations.

This reverts the two commits:
 * "seccomp: libseccomp version varying according to arch"
   (commit 896848f0)
 * "seccomp: update libseccomp version and remove arch restriction"
   (commit 8e27fc20)
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-id: 1428670681-23032-1-git-send-email-peter.maydell@linaro.org
      ae6e8ef1
    • T
      pci: Fix crash with illegal "-net nic, model=xxx" option · 4d0ecde4
      由 Thomas Huth 提交于 
      Current QEMU crashes when specifying an illegal model with the
"-net nic,model=xxx" option, e.g.:

 $ qemu-system-x86_64 -net nic,model=n/a
 qemu-system-x86_64: Unsupported NIC model: n/a

 Program received signal SIGSEGV, Segmentation fault.

The gdb backtrace looks like this:

0x0000555555965fe0 in error_get_pretty (err=0x0) at util/error.c:152
152	    return err->msg;
(gdb) bt
 0  0x0000555555965fe0 in error_get_pretty (err=0x0) at util/error.c:152
 1  0x0000555555965ffd in error_report_err (err=0x0) at util/error.c:157
 2  0x0000555555809c90 in pci_nic_init_nofail (nd=0x555555e49860 <nd_table>, rootbus=0x5555564409b0,
    default_model=0x55555598c37b "e1000", default_devaddr=0x0) at hw/pci/pci.c:1663
 3  0x0000555555691e42 in pc_nic_init (isa_bus=0x555556f71900, pci_bus=0x5555564409b0)
    at hw/i386/pc.c:1506
 4  0x000055555569396b in pc_init1 (machine=0x5555562abbf0, pci_enabled=1, kvmclock_enabled=1)
    at hw/i386/pc_piix.c:248
 5  0x0000555555693d27 in pc_init_pci (machine=0x5555562abbf0) at hw/i386/pc_piix.c:310
 6  0x000055555572ddf5 in main (argc=3, argv=0x7fffffffe018, envp=0x7fffffffe038) at vl.c:4226

The problem is that pci_nic_init_nofail() does not check whether the err
parameter from pci_nic_init has been set up and thus passes a NULL pointer
to error_report_err(). Fix it by correctly checking the err parameter.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NJason Wang <jasowang@redhat.com>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
      4d0ecde4
    • A
      stm32f205: Fix SoC type name · 342b0711
      由 Andreas Färber 提交于 
      The type name for the SoC device, unlike those of its sub-devices,
did not follow the QOM naming conventions. While the usage is internal
only, this is exposed through QMP and HMP, so fix it before release.

Cc: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Reviewed-by: NAlistair Francis <alistair@alistair23.me>
Message-id: 1428676676-23056-1-git-send-email-afaerber@suse.de
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
      342b0711
  17. 11 4月, 2015 1 次提交
  19. 10 4月, 2015 4 次提交
  21. 09 4月, 2015 5 次提交
    • P
      Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging · a6f2cb03
      由 Peter Maydell 提交于 
      # gpg: Signature made Thu Apr  9 10:55:11 2015 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/block-pull-request:
  block/iscsi: handle zero events from iscsi_which_events
  aio: strengthen memory barriers for bottom half scheduling
  virtio-blk: correctly dirty guest memory
  qcow2: Fix header update with overridden backing file
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
      a6f2cb03
    • P
      tcg/tcg-op.c: Fix ld/st of 64 bit values on 32-bit bigendian hosts · cf811fff
      由 Peter Maydell 提交于 
      Commit 951c6300 out-of-lined the 32-bit-host versions of
tcg_gen_{ld,st}_i64, but in the process it inadvertently changed
an #ifdef HOST_WORDS_BIGENDIAN to #ifdef TCG_TARGET_WORDS_BIGENDIAN.
Since the latter doesn't get defined anywhere this meant we always
took the "LE host" codepath, and stored the two halves of the value
in the wrong order on BE hosts. This typically breaks any 64-bit
guest on a 32-bit BE host completely, and will have possibly more
subtle effects even for 32-bit guests.

Switch the ifdef back to HOST_WORDS_BIGENDIAN.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Tested-by: NAndreas Färber <afaerber@suse.de>
Message-id: 1428523029-13620-1-git-send-email-peter.maydell@linaro.org
      cf811fff
    • P
      block/iscsi: handle zero events from iscsi_which_events · 05b685fb
      由 Peter Lieven 提交于 
      newer libiscsi versions may return zero events from iscsi_which_events.

In this case iscsi_service will return immediately without any progress.
To avoid busy waiting for iscsi_which_events to change we deregister all
read and write handlers in this case and schedule a timer to periodically
check iscsi_which_events for changed events.

Next libiscsi version will introduce async reconnects and zero events
are returned while libiscsi is waiting for a reconnect retry.
Signed-off-by: NPeter Lieven <pl@kamp.de>
Message-id: 1428437295-29577-1-git-send-email-pl@kamp.de
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
      05b685fb
    • P
      aio: strengthen memory barriers for bottom half scheduling · e8d3b1a2
      由 Paolo Bonzini 提交于 
      There are two problems with memory barriers in async.c.  The fix is
to use atomic_xchg in order to achieve sequential consistency between
the scheduling of a bottom half and the corresponding execution.

First, if bh->scheduled is already 1 in qemu_bh_schedule, QEMU does
not execute a memory barrier to order any writes needed by the callback
before the read of bh->scheduled.  If the other side sees req->state as
THREAD_ACTIVE, the callback is not invoked and you get deadlock.

Second, the memory barrier in aio_bh_poll is too weak.  Without this
patch, it is possible that bh->scheduled = 0 is not "published" until
after the callback has returned.  Another thread wants to schedule the
bottom half, but it sees bh->scheduled = 1 and does nothing.  This causes
a lost wakeup.  The memory barrier should have been changed to smp_mb()
in commit 924fe129 (aio: fix qemu_bh_schedule() bh->ctx race condition,
2014-06-03) together with qemu_bh_schedule()'s.  Guess who reviewed
that patch?

Both of these involve a store and a load, so they are reproducible on
x86_64 as well.  It is however much easier on aarch64, where the
libguestfs test suite triggers the bug fairly easily.  Even there the
failure can go away or appear depending on compiler optimization level,
tracing options, or even kernel debugging options.

Paul Leveille however reported how to trigger the problem within 15
minutes on x86_64 as well.  His (untested) recipe, reproduced here
for reference, is the following:

   1) Qcow2 (or 3) is critical – raw files alone seem to avoid the problem.

   2) Use “cache=directsync” rather than the default of
   “cache=none” to make it happen easier.

   3) Use a server with a write-back RAID controller to allow for rapid
   IO rates.

   4) Run a random-access load that (mostly) writes chunks to various
   files on the virtual block device.

      a. I use ‘diskload.exe c:25’, a Microsoft HCT load
         generator, on Windows VMs.

      b. Iometer can probably be configured to generate a similar load.

   5) Run multiple VMs in parallel, against the same storage device,
   to shake the failure out sooner.

   6) IvyBridge and Haswell processors for certain; not sure about others.

A similar patch survived over 12 hours of testing, where an unpatched
QEMU would fail within 15 minutes.

This bug is, most likely, also the cause of failures in the libguestfs
testsuite on AArch64.

Thanks to Laszlo Ersek for initially reporting this bug, to Stefan
Hajnoczi for suggesting closer examination of qemu_bh_schedule, and to
Paul for providing test input and a prototype patch.
Reported-by: NLaszlo Ersek <lersek@redhat.com>
Reported-by: NPaul Leveille <Paul.Leveille@stratus.com>
Reported-by: NJohn Snow <jsnow@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Message-id: 1428419779-26062-1-git-send-email-pbonzini@redhat.com
Suggested-by: NPaul Leveille <Paul.Leveille@stratus.com>
Suggested-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
      e8d3b1a2
    • D
      arm: memory: Replace memory_region_init_ram with memory_region_allocate_system_memory · c8623c02
      由 Dirk Müller 提交于 
      Commit 0b183fc8:"memory: move mem_path handling to
memory_region_allocate_system_memory" split memory_region_init_ram and
memory_region_init_ram_from_file. Also it moved mem-path handling a step
up from memory_region_init_ram to memory_region_allocate_system_memory.

Therefore for any board that uses memory_region_init_ram directly,
-mem-path is not supported.

Fix this by replacing memory_region_init_ram with
memory_region_allocate_system_memory.
Signed-off-by: NDirk Mueller <dmueller@suse.com>
Message-id: CAL5wTH4UHYKpJF=dLJfFzxpufjY189chnCow47-ySuLf8GLbug@mail.gmail.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
      c8623c02