Commit Graph

23462 Commits

Author SHA1 Message Date
Max Filippov
044d003db9 qemu-tech.texi: update implemented xtensa features list
Debug option is available since QEMU-1.2; FP coprocessor and
coprocessor context is available since QEMU-1.3.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-29 13:00:52 -06:00
Anthony Liguori
e912c96f7d qdev: relax bus type check in qdev_device_add() (v2)
We are currently checking for an exact type match.  Use QOM dynamic_cast to
check for a compatible type instead.

Cc: Konrad Frederic <fred.konrad@greensocs.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
v1 -> v2:
 - also add cast to qbus_find_recursive (Peter)
 - simplify by doing object_dynamic_cast instead of messing with classes
2012-11-29 09:11:03 -06:00
Bruce Rogers
1d16252652 qapi: fix qapi_dealloc_type_size parameter type
The second parameter to qapi_dealloc_type_size should be a uint64_t *,
not a size_t *. This was causing our 32 bit x86 build to fail, since
warnings are treated as errors.

Signed-off-by: Bruce Rogers <brogers@suse.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2012-11-29 11:05:23 -02:00
Peter Crosthwaite
2b29f492c8 ehci-sysbus: Attach DMA context.
This was left as NULL on the initial merge due to debate on the mailing list on
how to handle DMA contexts for sysbus devices. Patch
9e11908f12 was later merged to fix OHCI. This is the,
equivalent fix for sysbus EHCI.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-11-29 08:04:13 +01:00
Stefan Hajnoczi
c128d6a6d7 usb: fail usbdevice_create() when there is no USB bus
Report an error instead of segfaulting when attaching a USB device to a
machine with no USB busses:

  $ qemu-system-arm -machine vexpress-a9 \
      -sd Fedora-17-armhfp-vexpress-mmcblk0.img \
      -kernel vmlinuz-3.4.2-3.fc17.armv7hl \
      -initrd initramfs-3.4.2-3.fc17.armv7hl.img \
      -usbdevice disk:format=raw:test.img

Note that the vexpress-a9 machine does not have a USB host controller.

Reported-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-11-29 08:04:13 +01:00
Gerd Hoffmann
6c2d1c32d0 usb: tag usb host adapters as not hotpluggable.
Hotplugging them simply doesn't work, so tag them accordingly to
avoid users trying and then crashing qemu.

For xhci there is nothing fundamental which prevents hotplug from
working, we'll "only" need a exit() function which cleans up
everything properly.  That isn't for 1.3 though.

For ehci+uhci+ohci hotplug can't be supported until qemu gains the
capability to hotplug multifunction pci devices.

https://bugzilla.redhat.com/show_bug.cgi?id=879096

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-11-29 08:04:13 +01:00
Yonit Halperin
fa98efe932 qxl: reload memslots after migration, when qxl is in UNDEFINED mode
The devram memslot stays active when qxl enters UNDEFINED mode (i.e, no
primary surface). If migration has occurred while the device is in
UNDEFINED stae, the memslots have to be reloaded at the destination.

Fixes rhbz#874574

Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-11-29 07:58:45 +01:00
Jan Kiszka
e9bff10f8d event notifier: Fix setup for win32
The event notifier state is only reset by test_and_clear. But we created
the windows event object with auto-reset, which subtly swallowed events.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-28 13:33:01 -06:00
Anthony Liguori
264ac41ca1 Merge remote-tracking branch 'bonzini/nbd-next' into staging
* bonzini/nbd-next:
  nbd-server-add: Fix the default for 'writable'
  nbd: fix use of two uninitialized bytes when connecting to a named export

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-28 13:19:30 -06:00
Anthony Liguori
e6451fd372 Merge remote-tracking branch 'bonzini/scsi-next' into staging
* bonzini/scsi-next:
  virtio-scsi: Fix subtle (guest) endian bug
  virtio-scsi: Fix some endian bugs with virtio-scsi
  iscsi: do not assume device is zero initialized
  iscsi: fix deadlock during login
  iscsi: fix segfault in url parsing

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-28 13:19:24 -06:00
Anthony Liguori
0a6b2ac0cf Merge remote-tracking branch 'agraf/s390-for-upstream-1.3' into staging
* agraf/s390-for-upstream-1.3:
  sclp: Fix uninitialized var in handle_write_event_buf().
  s390: Fix ram_size updating in machine init

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-28 13:19:16 -06:00
Anthony Liguori
7e68494b0b Merge remote-tracking branch 'agraf/ppc-for-upstream-1.3' into staging
* agraf/ppc-for-upstream-1.3:
  fbdev: fix pixman compile on old pixman
  vl.c: Fix broken -usb option
  pseries: Fix bug in PCI MSI allocation
  kvm: fix incorrect length in a loop over kvm dirty pages map
  PPC: Fix missing TRACE exception
  hw/ide/macio: Fix segfault caused by NULL DMAContext*

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-28 13:19:06 -06:00
Anthony Liguori
f3d44eb53c Merge remote-tracking branch 'afaerber/qom-cpu-1.3' into staging
* afaerber/qom-cpu-1.3:
  target-i386: Enable SSSE3 TCG support
  target-i386/cpu: Add missing flags to Haswell CPU model

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-28 13:18:56 -06:00
Paolo Bonzini
cbdd1999da build: compile translate.o with -fno-gcse option on GCC 4.6.x and 4.7.[012]
These versions of GCC require insane (>2GB) amounts of memory to compile
translate.o.  As a countermeasure, disable the culprit optimization pass.
This should fix the buildbot failure for default_x86_64_fedora16.  Anyway
this is a good thing to do because people will try to compile 1.3 with
less than 2GB of memory and complain.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-28 13:18:33 -06:00
David Gibson
863d1050c9 virtio-scsi: Fix subtle (guest) endian bug
The virtio-scsi config space is, by specification, in guest endian (which
is ill-defined, but there you go).  In virtio_scsi_get_config() we set up
all the fields in there, using stl_raw().  Which is a problem for the
max_channel and max_target fields, which are 16-bit, not 32-bit.  For
little-endian targets we get away with it by accident, since the first
two bytes will still be correct, and the extra two bytes written (with
zeroes) will be overwritten correctly by the next store.

But for big-endian guests, this means the max_target field ends up as zero,
which means the guest will only recognize a single disk on the virtio-scsi
bus.  This patch fixes the problem.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul 'Rusty' Russell <rusty@rustcorp.com.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28 12:52:00 +01:00
David Gibson
474ee55a18 virtio-scsi: Fix some endian bugs with virtio-scsi
The virtio-scsi specification does not specify the correct endianness for
fields in the request structure.  It's therefore best to assume that it is
"guest native" endian since that's the (stupid and poorly defined) norm in
virtio.

However, the qemu device for virtio-scsi has no byteswaps at all, and so
will break if the guest has different endianness from the host.  This patch
fixes it by adding tswap() calls for the sense_len and resid fields in
the request structure.  In theory status_qualifier needs swaps as well,
but that field is never actually touched.  The tag field is a uint64_t, but
since its value is completely arbitrary, it might as well be uint8_t[8]
and so it does not need swapping.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul 'Rusty' Russell <rusty@rustcorp.com.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28 12:52:00 +01:00
Peter Lieven
f807ecd574 iscsi: do not assume device is zero initialized
Without any complex checks we can't assume that an
iscsi target is initialized to zero.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28 12:51:58 +01:00
Peter Lieven
e829b0bb05 iscsi: fix deadlock during login
If the connection is interrupted before the first login is successfully
completed qemu-kvm is waiting forever in qemu_aio_wait().

This is fixed by performing an sync login to the target. If the
connection breaks after the first successful login errors are
handled internally by libiscsi.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28 12:50:56 +01:00
Peter Lieven
8da1e18b0c iscsi: fix segfault in url parsing
If an invalid URL is specified iscsi_get_error(iscsi) is called
with iscsi == NULL.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28 12:46:13 +01:00
Michal Privoznik
f3313d23a0 nbd-server-add: Fix the default for 'writable'
The documentation to this monitor command tells, that 'writable'
argument is optional and defaults to false. However, the code sets
true as the default. But since some applications may already been
using this, it's safer to fix the code and not documentation which
would break those applications.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28 11:56:39 +01:00
Paolo Bonzini
8ffaaba0e9 nbd: fix use of two uninitialized bytes when connecting to a named export
Reported-by: Michal Privoznik <mprivoznik@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-28 11:56:35 +01:00
Alex Horn
02c6ccc6dd rtc: Only call rtc_set_cmos when Register B SET flag is disabled.
This bug occurs when the SET flag of Register B is enabled. When an RTC
data register (i.e. any of the ten time/calender CMOS bytes) is set, the
data is (as expected) correctly stored in the cmos_data array. However,
since the SET flag is enabled, the function rtc_set_time is not invoked.
As a result, the field base_rtc in RTCState remains uninitialized. This
causes a problem on subsequent writes which can end up overwriting data.
To see this, consider writing data to Register A after having written
data to any of the RTC data registers; the following figure illustrates
the call stack for the Register A write operation:

 +- cmos_io_port_write
 +-- check_update_timer
 +---- get_next_alarm
 +------ rtc_update_time

In rtc_update_time, get_guest_rtc calculates the wrong time and
overwrites the previously written RTC data register values.

Signed-off-by: Alex Horn <alex.horn@cs.ox.ac.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-27 11:04:33 -06:00
Paolo Bonzini
03a36f17d7 virtio-rng: do not use g_assert_cmpint
g_assert_cmpint is not available on glib 2.12, which is the minimum
version required to build QEMU (we only require 2.16 to run tests,
since that is the first version including GTester).  Do not use it
in hardware models, use a normal assertion instead.

This fixes the buildbot failure for default_x86_64_rhel5.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-27 08:51:07 -06:00
Paolo Bonzini
d60478c59a tests: make threadpool cancellation test looser
The cancellation test is failing on the buildbots.  While the failure
merits a little more investigation to understand what is going on,
the logs show that the failure is not impacting the coverage
provided by the test.  Hence, loosen a bit the assertions in a
way that should let the test proceed and hopefully pass.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-27 08:50:52 -06:00
Anthony Liguori
1e1d71a582 Update version for 1.3.0-rc1
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 15:13:31 -06:00
Amit Shah
42015c9acb virtio-rng: fix typos, comments
Fix typos, whitespace and update comments to match current
implementation.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 14:26:37 -06:00
Amit Shah
8cc6774354 virtio-rng: disable timer on device removal
Disable the rate-limit timer on device remove (e.g. hot-unplug).

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 14:26:37 -06:00
Amit Shah
4621c1768e virtio-rng: remove extra request for entropy
If we got fewer bytes from the backend than requested, don't poke the
backend for more bytes; the guest will ask for more (or if the guest has
already asked for more, the backend knows about it via handle_input()).

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 14:26:37 -06:00
Amit Shah
1441703965 virtio-rng: use virtqueue_get_avail_bytes, fix migration
Popping an elem from the vq just to find out its length causes problems
with save/load later on.  Use the new virtqueue_get_avail_bytes()
function instead, saves us the complexity in the migration code, as well
as makes the migration endian-safe.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 14:26:37 -06:00
Andreas Färber
25d87288b1 i8259: Fix PIC_COMMON() macro
It used a wrong struct type name since its introduction in
8f04ee0882 (isa: pic: convert to QEMU
Object Model), apparently it is unused so far.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 14:25:42 -06:00
Stefan Hajnoczi
0c26f2eca4 qapi: handle visitor->type_size() in QapiDeallocVisitor
visit_type_size() requires either visitor->type_size() or
visitor_uint64() to be implemented, otherwise a NULL function pointer is
invoked.

It is possible to trigger this crash as follows:

  $ qemu-system-x86_64 -netdev tap,sndbuf=0,id=netdev0 \
                       -device virtio-blk-pci,netdev=netdev0

The 'sndbuf' option has type "size".

Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 14:25:06 -06:00
Eduardo Habkost
e1e54f3fbe target-i386: cpu: add missing flags to Haswell CPU model
When adding the Haswell CPU model, I intended to make it a superset of the
features present on the SandyBridge model, but I have removed the SEP and
RDTSCP features from the feature list by mistake. This patch adds the missing
SEP and RDTSCP features (that are present on SandyBridge) to Haswell.

Reported-by: Martin Kletzander <mkletzan@redhat.com>
Acked-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 14:24:11 -06:00
Peter Maydell
fa5358c69d vl.c: Fix broken -usb option
Commit 094b287f0b accidentally broke the "-usb" command line
option, so it would have no effect if the user had not specified
any machine options at that point. (the return value from
'qemu_opts_find(qemu_find_opts("machine"), 0);' is NULL if there
are no user specified options, so it is only to be used for
looking up an option, not when trying to set one.) Similarly,
would '-usbdevice' no longer cause USB to default to enabled.

Fix this regression by using the same style of code for forcing
the usb=on machine option that we use for other aliases such as
'-enable-kvm'.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 13:53:52 -06:00
Paolo Bonzini
339c2708e7 qom: make object_finalize static
It is not used anymore, and there is no need to make it public.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 13:41:01 -06:00
Paolo Bonzini
64b625f4b2 qdev: simplify (de)allocation of buses
All conditional deallocation can now be done with object_delete.
Remove the @qom_allocated and @glib_allocated fields; replace the latter
with a direct assignment of the @free function pointer.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 13:41:00 -06:00
Paolo Bonzini
fde9bf4470 qom: make object_delete usable for statically-allocated objects
Store in the object the freeing function that will be used at deletion
time.  This makes it possible to use object_delete on statically-allocated
(embedded) objects.  Dually, it makes it possible to use object_unparent
and object_unref without leaking memory, when the lifetime of object
might extend until after the call to object_delete.

Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 13:41:00 -06:00
Paolo Bonzini
667d22d1ae qdev: move bus removal to object_unparent
Add an ObjectClass method that is done at object_unparent time.  It
should remove any backlinks to the object in the composition tree,
so that object_delete will be able to drop the last reference and
free the object.

Use it for qdev buses.

Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 13:41:00 -06:00
Paolo Bonzini
764b63125a qom: fix refcount of non-heap-allocated objects
The reference count for embedded objects is always one too low, because
object_initialize_with_type returns with zero references to the object.
This causes premature finalization of the object (or an assertion failure)
after calling object_ref to add an extra reference and object_unref to
remove it.

The fix is to move the initial object_ref call from object_new_with_type
to object_initialize_with_type.

Acked-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 13:41:00 -06:00
Cornelia Huck
773de5c786 sclp: Fix uninitialized var in handle_write_event_buf().
Some gcc versions rightly complain about a possibly unitialized rc,
so let's move setting it before the QTAILQ_FOREACH().

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 20:16:26 +01:00
Heinz Graalfs
8c7c3c58e3 s390: Fix ram_size updating in machine init
The global variable 'ram_size' is hidden by the local variable
declaration in s390_init(). Since we want to update the global
ram size in certain cases we must not use a local ram_size
variable.
- This fixes booting with unusual ram sizes like -m 67001
- This changes behaviour back to the situation before commit
  5f072e1f30
  (create struct for machine initialization arguments)

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 20:16:26 +01:00
Alexander Graf
6e72719e72 fbdev: fix pixman compile on old pixman
My QEMU compile failed with the following error:

qemu-pixman.c: In function ‘qemu_pixman_get_type’:
qemu-pixman.c:24: error: ‘PIXMAN_TYPE_BGRA’ undeclared (first use in this function)
qemu-pixman.c:24: error: (Each undeclared identifier is reported only once
qemu-pixman.c:24: error: for each function it appears in.)

Guard the PIXMAN_TYPE_BGRA branch like in the case right above the failing
case, so that compilation is fixed. Functionality on such old pixman is a
different question ;-).

Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 19:53:26 +01:00
Peter Maydell
c4d88267ae vl.c: Fix broken -usb option
Commit 094b287f0b accidentally broke the "-usb" command line
option, so it would have no effect if the user had not specified
any machine options at that point. (the return value from
'qemu_opts_find(qemu_find_opts("machine"), 0);' is NULL if there
are no user specified options, so it is only to be used for
looking up an option, not when trying to set one.) Similarly,
would '-usbdevice' no longer cause USB to default to enabled.

Fix this regression by using the same style of code for forcing
the usb=on machine option that we use for other aliases such as
'-enable-kvm'.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 19:53:26 +01:00
Alexey Kardashevskiy
70c68cf638 pseries: Fix bug in PCI MSI allocation
In one of the recent reworks to the XICS code, a bug was introduced where
we use the wrong sense and allocate level interrupts instead of message
interrupts for PCI MSIs.  This patch fixes it.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 19:53:26 +01:00
Alexey Kardashevskiy
752ced0488 kvm: fix incorrect length in a loop over kvm dirty pages map
QEMU allocates a map enough for 4k pages. However the system page size
can be 64K (for example on POWER) and the host kernel uses only a small
part of it as one big stores a dirty flag for 16 pages 4K each,
the hpratio variable stores this ratio and
the kvm_get_dirty_pages_log_range function handles it correctly.

However kvm_get_dirty_pages_log_range still goes beyond the data
provided by the host kernel which is not correct. It does not cause
errors at the moment as the whole bitmap is zeroed before doing KVM ioctl.

The patch reduces number of iterations over the map.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 19:53:26 +01:00
Julio Guerra
f0cc4aa845 PPC: Fix missing TRACE exception
This patch fixes bug 1031698 :
https://bugs.launchpad.net/qemu/+bug/1031698

If we look at the (truncated) translation of the conditional branch
instruction in the test submitted in the bug post, the call to the
exception helper is missing in the "bne-false" chunk of translated
code :

IN:
bne-    0x1800278

OUT:
0xb544236d:  jne    0xb5442396

0xb5442373:  mov    %ebp,(%esp)
0xb5442376:  mov    $0x44,%ebx
0xb544237b:  mov    %ebx,0x4(%esp)
0xb544237f:  mov    $0x1800278,%ebx
0xb5442384:  mov    %ebx,0x25c(%ebp)
0xb544238a:  call   0x827475a
                     ^^^^^^^^^^^^^^^^^^

0xb5442396:  mov    %ebp,(%esp)
0xb5442399:  mov    $0x44,%ebx
0xb544239e:  mov    %ebx,0x4(%esp)
0xb54423a2:  mov    $0x1800270,%ebx
0xb54423a7:  mov    %ebx,0x25c(%ebp)

Indeed, gen_exception(ctx, excp) called by gen_goto_tb (called by
gen_bcond) changes ctx->exception's value to excp's :

gen_bcond()
{
  gen_goto_tb(ctx, 0, ctx->nip + li - 4);
  /* ctx->exception value is POWERPC_EXCP_BRANCH */

  gen_goto_tb(ctx, 1, ctx->nip);
  /* ctx->exception now value is POWERPC_EXCP_TRACE */
}

Making the following gen_goto_tb()'s test false during the second call :

if ((ctx->singlestep_enabled &
    (CPU_BRANCH_STEP | CPU_SINGLE_STEP)) &&
    ctx->exception == POWERPC_EXCP_BRANCH /* false...*/) {
         target_ulong tmp = ctx->nip;
         ctx->nip = dest;
         /* ... and this is the missing call */
         gen_exception(ctx, POWERPC_EXCP_TRACE);
         ctx->nip = tmp;
}

So the patch simply adds the missing matching case, fixing our problem.

Signed-off-by: Julio Guerra <guerr@julio.in>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 19:53:26 +01:00
Peter Maydell
d688e5239a hw/ide/macio: Fix segfault caused by NULL DMAContext*
Pass qemu_sglist_init the global dma_context_memory rather than a NULL
pointer; this fixes a segfault in dma_memory_map() when the guest
starts using DMA.

Reported-by: Amadeusz Sławiński <amade@asmblr.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-11-26 19:53:26 +01:00
Aurelien Jarno
a0a7068104 target-i386: Enable SSSE3 TCG support
SSSE3 support has been added to TCG more than 4 years ago in commit
4242b1bd8a. It has been disabled by
mistake in commit 551a2dec8f.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2012-11-26 17:00:11 +01:00
Eduardo Habkost
80ae416058 target-i386/cpu: Add missing flags to Haswell CPU model
When adding the Haswell CPU model, I intended to make it a superset of the
features present on the SandyBridge model, but I have removed the SEP and
RDTSCP features from the feature list by mistake. This patch adds the
missing SEP and RDTSCP features (that are present on SandyBridge) to
Haswell.

Reported-by: Martin Kletzander <mkletzan@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2012-11-26 16:55:33 +01:00
Paolo Bonzini
b5007bcc97 hmp: do not crash on invalid SCSI hotplug
Commit 0d93692 (qdev: Convert busses to QEMU Object Model, 2012-05-02)
removed a check on the type of the bus where a SCSI disk is hotplugged.
However, hot-plugging to the wrong kind of device now causes a crash
due to either a NULL pointer dereference (avoided by the previous patch)
or a failed QOM cast.

Instead, in this case we need to use object_dynamic_cast and check for
the result, similar to what was done before that commit.

Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 09:38:54 -06:00
Paolo Bonzini
b7f43fe460 qom: dynamic_cast of NULL is always NULL
Trying to cast a NULL value will cause a crash.  Returning
NULL is also sensible, and it is also what the type-unsafe
DO_UPCAST macro does.

Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-11-26 09:38:54 -06:00