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  1. 16 3月, 2016 9 次提交
    • P
      icount: decouple warp calls · e76d1798
      由 Pavel Dovgalyuk 提交于 
      qemu_clock_warp function is called to update virtual clock when CPU
is sleeping. This function includes replay checkpoint to make execution
deterministic in icount mode.
Record/replay module flushes async event queue at checkpoints.
Some of the events (e.g., block devices operations) include interaction
with hardware. E.g., APIC polled by block devices sets one of IRQ flags.
Flag to be set depends on currently executed thread (CPU or iothread).
Therefore in replay mode we have to process the checkpoints in the same thread
as they were recorded.
qemu_clock_warp function (and its checkpoint) may be called from different
thread. This patch decouples two different execution cases of this function:
call when CPU is sleeping from iothread and call from cpu thread to update
virtual clock.
First task is performed by qemu_start_warp_timer function. It sets warp
timer event to the moment of nearest pending virtual timer.
Second function (qemu_account_warp_timer) is called from cpu thread
before execution of the code. It advances virtual clock by adding the length
of period while CPU was sleeping.
Signed-off-by: NPavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20160310115609.4812.44986.stgit@PASHA-ISP>
[Update docs. - Paolo]
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      e76d1798
    • P
      icount: remove obsolete warp call · 281b2201
      由 Pavel Dovgalyuk 提交于 
      qemu_clock_warp call in qemu_tcg_wait_io_event function is not needed
anymore, because it is called in every iteration of main_loop_wait.
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NPavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20160310115603.4812.67559.stgit@PASHA-ISP>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      281b2201
    • P
      replay: character devices · 33577b47
      由 Pavel Dovgalyuk 提交于 
      This patch implements record and replay of character devices.
It records chardevs communication in replay mode. Recorded information
include data read from backend and counter of bytes written
from frontend to backend to preserve frontend internal state.
If character device was configured through the command line in record mode,
then in replay mode it should be also added to command line. Backend of
the character device could be changed in replay mode.
Replaying of devices that perform ioctl and get_msgfd operations is not
supported.
gdbstub which also acts as a backend is not recorded to allow controlling
the replaying through gdb. Monitor backends are also not recorded.
Signed-off-by: NPavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20160314074436.4980.83856.stgit@PASHA-ISP>
[Add stubs. - Paolo]
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      33577b47
    • P
      exec: fix early return from ram_block_add · 39c350ee
      由 Paolo Bonzini 提交于 
      After reporting an error, ram_block_add was going on with the registration
of the RAMBlock.  The visible effect is that it unlocked the ramlist
mutex twice.

Fixes: 528f46afReviewed-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      39c350ee
    • M
      exec: Fix memory allocation when memory path isn't on hugetlbfs · e1fb6471
      由 Markus Armbruster 提交于 
      gethugepagesize() works reliably only when its argument is on
hugetlbfs.  When it's not, it returns the filesystem's "optimal
transfer block size", which may or may not be the actual page size
you'll get when you mmap().

If the value is too small or not a power of two, we fail
qemu_ram_mmap()'s assertions.  These were added in commit 794e8f30
(v2.5.0).  The bug's impact before that is currently unknown.  Seems
fairly unlikely at least when the normal page size is 4KiB.

Else, if the value is too large, we align more strictly than
necessary.

gethugepagesize() goes back to commit c902760f (v0.13).  That commit
clearly intended gethugepagesize() to be used on hugetlbfs only.  Not
only was it named accordingly, it also printed a warning when used on
anything else.  However, the commit neglected to spell out the
restriction in user documentation of -mem-path.

Commit bfc2a1a1 (v2.5.0) dropped the warning as bogus "because QEMU
functions perfectly well with the path on a regular tmpfs filesystem".
It sure does when you're sufficiently lucky.  In my testing, I was
lucky, too.

Fix by switching to qemu_fd_getpagesize().  Rename the variable
holding its result from hpagesize to page_size.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Message-Id: <1457378754-21649-3-git-send-email-armbru@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      e1fb6471
    • M
      exec: Fix memory allocation when memory path names new file · fd97fd44
      由 Markus Armbruster 提交于 
      Commit 8d31d6b6 extended file_ram_alloc() to accept file names in
addition to directory names.  Even though it passes O_CREAT to open(),
it actually works only for existing files.  Reproducer adapted from
the commit's qemu-doc.texi update:

    $ qemu-system-x86_64 -object memory-backend-file,size=2M,mem-path=/dev/hugepages/my-shmem-file,id=mb1
    qemu-system-x86_64: -object memory-backend-file,size=2M,mem-path=/dev/hugepages/my-shmem-file,id=mb1: failed to get page size of file /dev/hugepages/my-shmem-file: No such file or directory

This is because we first get the page size for @path, then open the
actual file.  Unwise even before the flawed commit, because the
directory could change in between, invalidating the page size.
Unlikely to bite in practice.

Rearrange the code to create the file (if necessary) before getting
its page size.  Carefully avoid TOCTTOU conditions with a method
suggested by Paolo Bonzini.

While there, replace "hugepages" by "guest RAM" in error messages,
because host memory backends can be used for purposes other than huge
pages, e.g. /dev/shm/ shared memory.  Help text of -mem-path agrees.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Message-Id: <1457378754-21649-2-git-send-email-armbru@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      fd97fd44
    • A
      update-linux-headers: Add userfaultfd.h · 2ae823d4
      由 Alexey Kardashevskiy 提交于 
      userfailtfd.h is used by post-copy migration so include it to
the update-linux-headers.sh as we want it updated altogether with
other kernel headers.
Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <1455512381-15271-1-git-send-email-aik@ozlabs.ru>
Acked-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      2ae823d4
    • R
      kvm: x86: q35: Add support for -machine kernel_irqchip=split for q35 · b094f2e0
      由 Rita Sinha 提交于 
      The split IRQ chip mode via KVM_CAP_SPLIT_IRQCHIP was introduced with commit
15eafc2e but was broken for q35. This patch makes kernel_irqchip=split
functional for q35.
Signed-off-by: NRita Sinha <rita.sinha89@gmail.com>
Message-Id: <1457378525-16455-1-git-send-email-rita.sinha89@gmail.com>
Reviewed-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      b094f2e0
    • P
      Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging · a58a4cb1
      由 Peter Maydell 提交于 
      vhost, virtio, pci, pc, acpi

nvdimm work
sparse cpu id rework
ipmi enhancements
fixes all over the place
pxb option to tweak chassis number
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Tue 15 Mar 2016 14:33:10 GMT using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"

* remotes/mst/tags/for_upstream: (51 commits)
  hw/acpi: fix GSI links UID
  ipmi: add some local variables in ipmi_sdr_init
  ipmi: remove the need of an ending record in the SDR table
  ipmi: use a function to initialize the SDR table
  ipmi: add a realize function to the device class
  ipmi: add rsp_buffer_set_error() helper
  ipmi: remove IPMI_CHECK_RESERVATION() macro
  ipmi: replace IPMI_ADD_RSP_DATA() macro with inline helpers
  ipmi: remove IPMI_CHECK_CMD_LEN() macro
  MAINTAINERS: machine core
  MAINTAINERS: Add an entry for virtio header files
  pc: acpi: clarify why possible LAPIC entries must be present in MADT
  pc: acpi: drop cpu->found_cpus bitmap
  pc: acpi: create Processor and Notify objects only for valid lapics
  pc: acpi: create MADT.lapic entries only for valid lapics
  pc: acpi: SRAT: create only valid processor lapic entries
  pc: acpi: cleanup qdev_get_machine() calls
  machine: introduce MachineClass.possible_cpu_arch_ids() hook
  pc: init pcms->apic_id_limit once and use it throughout pc.c
  pc: acpi: remove NOP assignment
  ...
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
      a58a4cb1
  3. 15 3月, 2016 27 次提交
  5. 14 3月, 2016 4 次提交