In case we cannot open the newly created snapshot image, try to fall
back to the original image file and continue running on that, which
should prevent the guest from aborting.
This is a corner case which can happen if the admin by mistake
specifies the snapshot file on a virtual file system which does not
support O_DIRECT. bdrv_create() does not use O_DIRECT, but the
following open in bdrv_open() does and will then fail.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch fixes two things:
1) CHECK POWER MODE
The error return value wasn't always zero, so it would show up as
offline. Error is now explicitly set to zero.
2) SMART
The smart values that were returned were invalid and tools like skdump
would not recognize that the smart data was actually valid and would
dump weird output. The data has been fixed up and raw value support
was added. Tools like skdump and palimpsest work as expected.
Signed-off-by: Brian Wheeler <bdwheele@indiana.edu>
Acked-by: Ryan Harper <ryanh@us.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
If the block device has been closed, we no longer have a medium to submit
IO against, check for this before submitting io. This prevents a segfault
further in the code where we dereference elements of the block driver.
Signed-off-by: Ryan Harper <ryanh@us.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
It's wrong to call BHs directly, even in tools. The only operations that
schedule BHs are called in a loop that (indirectly) contains a call to
qemu_bh_poll anyway, so we're not losing the scheduled BHs: Tools either use
synchronous functions, which are guaranteed to have completed (including any
BHs) when they return; or if they use asynchronous functions, they need to call
qemu_aio_wait() or similar functions already today.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This patch is similar to 171e3d6b99
which fixed qcow2:
Returning -EIO is far from optimal, but at least it's an error code.
In addition to read/write failures, -EIO is also returned when
decompress_cluster failed.
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch is similar to 171e3d6b99
which fixed qcow2:
Returning -EIO is far from optimal, but at least it's an error code.
Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Whenever env->created becomes true, qemu_cpu_cond is signaled by
{kvm,tcg}_cpu_thread_fn.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
all_vcpus_paused can start returning true after penv->stopped changes
from 0 to 1. When this is done, qemu_pause_cond is always signaled.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
qemu_main_loop_start is the only place where qemu_system_ready is set
to 1.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The following conditions can cause cpu_has_work(env) to become true:
- env->queued_work_first: run_on_cpu is already kicking the VCPU
- env->stop = 1: pause_all_vcpus is already kicking the VCPU
- env->stopped = 0: resume_all_vcpus is already kicking the VCPU
- vm_running = 1: vm_start is calling resume_all_vcpus
- env->halted = 0: see previous patch
- qemu_cpu_has_work(env): when it becomes true, board code should set
env->halted = 0 too.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Sometimes vcpus are stopped directly without going through ->stop = 1.
Exit the VCPU execution loop in this case as well.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This ensures env->halt_cond is broadcast, and the loop in
qemu_tcg_wait_io_event and qemu_kvm_wait_io_event is exited
naturally rather than through a timeout.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
All implementations are now the same, and there is only one caller,
so inline the function there.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
These are already present in the Win32 implementation, add them to
the pthread wrappers as well. Use PTHREAD_MUTEX_ERRORCHECK for mutex
operations. Later we'll add tracking of the owner for cond_signal/broadcast.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
For now, qemu_cond_timedwait and qemu_mutex_timedlock are left as
POSIX-only functions. They can be removed later, once the patches
that remove their uses are in.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
We have qemu_cpu_self and qemu_thread_self. The latter is retrieving the
current thread, the former is checking for equality (using CPUState). We
also have qemu_thread_equal which is only used like qemu_cpu_self.
This refactors the interfaces, creating qemu_cpu_is_self and
qemu_thread_is_self as well ass qemu_thread_get_self.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Multimedia timers are only useful for compatibility with Windows NT 4.0
and earlier. Plus, the implementation in Wine is extremely heavyweight.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Index 75 is one too large for AR_TABLE[75], DR_TABLE[75].
This error was reported by cppcheck.
hw/fmopl.c:600: error: Buffer access out-of-bounds: OPL.AR_TABLE
hw/fmopl.c:601: error: Buffer access out-of-bounds: OPL.DR_TABLE
Fix this by limiting the access to the allowed range.
MultiArcadeMachineEmulator has newer versions of fmopl,
but using these requires more efforts.
Cc: Blue Swirl <blauwirbel@gmail.com>
Reviewed-by: malc <av1474@comtv.ru>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The initialization should not be only on reset but also when initializing
the device.
It resolves a bug when hot plugging a pci network device: the mac address
was always null.
Signed-off-by: William Dauchy <wdauchy@gmail.com>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Before commit 63ffb564dc, states for
floppy drives were calculated in fdc.c:fd_revalidate(). There it is
also considered whether a disk is inserted or not. The commit didn't copy
the logic completely to pc.c, which caused a regression.
Fix by adding the same check also to pc.c.
Reported-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Tested-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Specify PVR for writeback cache, endians and others.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
Commit bc2429b917 introduced
a severe bug (stack corruption).
bitmap_clear was called with a wrong argument
which caused out-of-bound writes to the local variable width_mask.
This bug was detected with QEMU running on windows.
It also occurs with wine:
*** stack smashing detected ***: terminated
wine: Unhandled illegal instruction at address 0x6115c7 (thread 0009), starting debugger...
The bug is not windows specific!
Instead of fixing the wrong parameter value, bitmap_clear(), bitmap_set
and width_mask were removed, and bitmap_intersect() was replaced by
!bitmap_empty(). The new operation is much shorter and equivalent to
the old operations.
The declarations of the dirty bitmaps in vnc.h were also wrong for 64 bit
hosts because of a rounding effect: for these hosts, VNC_MAX_WIDTH is no
longer a multiple of (16 * BITS_PER_LONG), so the rounded value of
VNC_DIRTY_WORDS was too small.
Fix both declarations by using the macro which is designed for this
purpose.
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: Gerhard Wiesinger <lists@wiesinger.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
client_migrate_info was merged badly, placing it between the command
and the documentation for another command. In addition it did not
respect the general rule of hmp-commands.hx, of having command
definition before the documentation.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
When the commit f471a17e9d converted the
ram_blocks structure to QLIST, it also removed the conditional check before
switching the current block at the beginning of the list.
In the common use case where ram_blocks has a few blocks with only one
frequently accessed (the main RAM), this has a performance impact as it
performs the useless list operations on each call (which are on a really
hot path).
On my machine emulation (ARM on amd64), this patch reduces the
percentage of CPU time spent in qemu_get_ram_ptr from 6.3% to 2.1% in the
profiling of a full boot.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Extend mst_fpga and mainstone with logic to support PCMCIA
attachment (IRQs, status regs).
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
