sdk/emulator/qemu.git
7 years agoMerge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20161024' into...
Peter Maydell [Mon, 24 Oct 2016 18:37:33 +0000 (19:37 +0100)]
Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20161024' into staging

target-arm queue:
 * support variable (runtime-determined) page sizes, for a
   nearly-20% speedup of TCG for ARMv7 and v8 CPUs with 4K pages
 * ptimer: add tests, support more flexible behaviour around
   what happens on the "zero" tick, use ptimer for a9gtimer
 * virt: ACPI: Add IORT Structure definition
 * i2c: Fix SMBus read transactions to avoid double events
 * timer: stm32f2xx_timer: add check for prescaler value
 * QOMify musicpal, pxa2xx_gpio, strongarm, pl110
 * target-arm: Implement new HLT trap for semihosting
 * i2c: Add asserts for second smbus i2c_start_transfer()

# gpg: Signature made Mon 24 Oct 2016 18:24:17 BST
# gpg:                using RSA key 0x3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20161024: (32 commits)
  i2c: Add asserts for second smbus i2c_start_transfer()
  target-arm: Implement new HLT trap for semihosting
  hw/display: QOM'ify pl110.c
  hw/arm: QOM'ify strongarm.c
  hw/arm: QOM'ify pxa2xx_gpio.c
  hw/arm: QOM'ify musicpal.c
  timer: stm32f2xx_timer: add check for prescaler value
  i2c: Fix SMBus read transactions to avoid double events
  timer: a9gtimer: remove loop to auto-increment comparator
  ARM: Virt: ACPI: Build an IORT table with RC and ITS nodes
  ACPI: Add IORT Structure definition
  tests: Add tests for the ARM MPTimer
  arm_mptimer: Convert to use ptimer
  tests: ptimer: Replace 10000 with 1
  tests: ptimer: Change the copyright comment
  tests: ptimer: Add tests for "no counter round down" policy
  hw/ptimer: Add "no counter round down" policy
  tests: ptimer: Add tests for "no immediate reload" policy
  hw/ptimer: Add "no immediate reload" policy
  tests: ptimer: Add tests for "no immediate trigger" policy
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoMerge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
Peter Maydell [Mon, 24 Oct 2016 17:26:59 +0000 (18:26 +0100)]
Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches

# gpg: Signature made Mon 24 Oct 2016 17:02:47 BST
# gpg:                using RSA key 0x7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (23 commits)
  block/replication: Clarify 'top-id' parameter usage
  block: More operations for meta dirty bitmap
  tests: Add test code for hbitmap serialization
  block: BdrvDirtyBitmap serialization interface
  hbitmap: serialization
  block: Assert that bdrv_release_dirty_bitmap succeeded
  block: Add two dirty bitmap getters
  block: Support meta dirty bitmap
  tests: Add test code for meta bitmap
  HBitmap: Introduce "meta" bitmap to track bit changes
  block: Hide HBitmap in block dirty bitmap interface
  quorum: do not allocate multiple iovecs for FIFO strategy
  quorum: change child_iter to children_read
  iotests: Do not rely on unavailable domains in 162
  iotests: Remove raciness from 162
  qemu-nbd: Add --fork option
  qemu-iotests: Test I/O in a single drive from a throttling group
  throttle: Correct access to wrong BlockBackendPublic structures
  qapi: fix memory leak in bdrv_image_info_specific_dump
  block: improve error handling in raw_open
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoMerge remote-tracking branch 'mreitz/tags/pull-block-2016-10-24' into queue-block
Kevin Wolf [Mon, 24 Oct 2016 16:02:26 +0000 (18:02 +0200)]
Merge remote-tracking branch 'mreitz/tags/pull-block-2016-10-24' into queue-block

Block patches for master

# gpg: Signature made Mon Oct 24 17:56:44 2016 CEST
# gpg:                using RSA key 0xF407DB0061D5CF40
# gpg: Good signature from "Max Reitz <mreitz@redhat.com>"
# Primary key fingerprint: 91BE B60A 30DB 3E88 57D1  1829 F407 DB00 61D5 CF40

* mreitz/tags/pull-block-2016-10-24:
  block/replication: Clarify 'top-id' parameter usage
  block: More operations for meta dirty bitmap
  tests: Add test code for hbitmap serialization
  block: BdrvDirtyBitmap serialization interface
  hbitmap: serialization
  block: Assert that bdrv_release_dirty_bitmap succeeded
  block: Add two dirty bitmap getters
  block: Support meta dirty bitmap
  tests: Add test code for meta bitmap
  HBitmap: Introduce "meta" bitmap to track bit changes
  block: Hide HBitmap in block dirty bitmap interface
  quorum: do not allocate multiple iovecs for FIFO strategy
  quorum: change child_iter to children_read

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoblock/replication: Clarify 'top-id' parameter usage
Changlong Xie [Wed, 12 Oct 2016 04:50:08 +0000 (12:50 +0800)]
block/replication: Clarify 'top-id' parameter usage

The replication driver only supports the 'top-id' parameter for the
secondary side; it must not be supplied for the primary side.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
Message-id: 1476247808-15646-1-git-send-email-xiecl.fnst@cn.fujitsu.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoblock: More operations for meta dirty bitmap
Fam Zheng [Thu, 13 Oct 2016 21:58:30 +0000 (17:58 -0400)]
block: More operations for meta dirty bitmap

Callers can create an iterator of meta bitmap with
bdrv_dirty_meta_iter_new(), then use the bdrv_dirty_iter_* operations on
it. Meta iterators are also counted by bitmap->active_iterators.

Also add a couple of functions to retrieve granularity and count.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-11-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agotests: Add test code for hbitmap serialization
Fam Zheng [Thu, 13 Oct 2016 21:58:29 +0000 (17:58 -0400)]
tests: Add test code for hbitmap serialization

Signed-off-by: Fam Zheng <famz@redhat.com>
[Fixed minor constant issue. --js]
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-10-git-send-email-jsnow@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoblock: BdrvDirtyBitmap serialization interface
Vladimir Sementsov-Ogievskiy [Thu, 13 Oct 2016 21:58:28 +0000 (17:58 -0400)]
block: BdrvDirtyBitmap serialization interface

Several functions to provide necessary access to BdrvDirtyBitmap for
block-migration.c

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[Add the "finish" parameters. - Fam]
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-9-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agohbitmap: serialization
Vladimir Sementsov-Ogievskiy [Thu, 13 Oct 2016 21:58:27 +0000 (17:58 -0400)]
hbitmap: serialization

Functions to serialize / deserialize(restore) HBitmap. HBitmap should be
saved to linear sequence of bits independently of endianness and bitmap
array element (unsigned long) size. Therefore Little Endian is chosen.

These functions are appropriate for dirty bitmap migration, restoring
the bitmap in several steps is available. To save performance, every
step writes only the last level of the bitmap. All other levels are
restored by hbitmap_deserialize_finish() as a last step of restoring.
So, HBitmap is inconsistent while restoring.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[Fix left shift operand to 1UL; add "finish" parameter. - Fam]
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-8-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoblock: Assert that bdrv_release_dirty_bitmap succeeded
Fam Zheng [Thu, 13 Oct 2016 21:58:26 +0000 (17:58 -0400)]
block: Assert that bdrv_release_dirty_bitmap succeeded

We use a loop over bs->dirty_bitmaps to make sure the caller is
only releasing a bitmap owned by bs. Let's also assert that in this case
the caller is releasing a bitmap that does exist.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-7-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoblock: Add two dirty bitmap getters
Fam Zheng [Thu, 13 Oct 2016 21:58:25 +0000 (17:58 -0400)]
block: Add two dirty bitmap getters

For dirty bitmap users to get the size and the name of a
BdrvDirtyBitmap.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-6-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoblock: Support meta dirty bitmap
Fam Zheng [Thu, 13 Oct 2016 21:58:24 +0000 (17:58 -0400)]
block: Support meta dirty bitmap

The added group of operations enables tracking of the changed bits in
the dirty bitmap.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-5-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agotests: Add test code for meta bitmap
Fam Zheng [Thu, 13 Oct 2016 21:58:23 +0000 (17:58 -0400)]
tests: Add test code for meta bitmap

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-4-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoHBitmap: Introduce "meta" bitmap to track bit changes
Fam Zheng [Thu, 13 Oct 2016 21:58:22 +0000 (17:58 -0400)]
HBitmap: Introduce "meta" bitmap to track bit changes

Upon each bit toggle, the corresponding bit in the meta bitmap will be
set.

Signed-off-by: Fam Zheng <famz@redhat.com>
[Amended text inline. --js]
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-3-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoblock: Hide HBitmap in block dirty bitmap interface
Fam Zheng [Thu, 13 Oct 2016 21:58:21 +0000 (17:58 -0400)]
block: Hide HBitmap in block dirty bitmap interface

HBitmap is an implementation detail of block dirty bitmap that should be hidden
from users. Introduce a BdrvDirtyBitmapIter to encapsulate the underlying
HBitmapIter.

A small difference in the interface is, before, an HBitmapIter is initialized
in place, now the new BdrvDirtyBitmapIter must be dynamically allocated because
the structure definition is in block/dirty-bitmap.c.

Two current users are converted too.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1476395910-8697-2-git-send-email-jsnow@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoquorum: do not allocate multiple iovecs for FIFO strategy
Paolo Bonzini [Wed, 5 Oct 2016 16:35:27 +0000 (18:35 +0200)]
quorum: do not allocate multiple iovecs for FIFO strategy

In FIFO mode there are no parallel reads, hence there is no need to
allocate separate buffers and clone the iovecs.

The two cases of quorum_aio_cb are now even more different, and
most of quorum_aio_finalize is only needed in one of them, so split
them in separate functions.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1475685327-22767-3-git-send-email-pbonzini@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoquorum: change child_iter to children_read
Paolo Bonzini [Wed, 5 Oct 2016 16:35:26 +0000 (18:35 +0200)]
quorum: change child_iter to children_read

This simplifies a bit the code by using the usual C "inclusive start,
exclusive end" pattern for ranges.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1475685327-22767-2-git-send-email-pbonzini@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
7 years agoiotests: Do not rely on unavailable domains in 162
Max Reitz [Wed, 28 Sep 2016 20:46:44 +0000 (22:46 +0200)]
iotests: Do not rely on unavailable domains in 162

There are some (mostly ISP-specific) name servers who will redirect
non-existing domains to special hosts. In this case, we will get a
different error message when trying to connect to such a host, which
breaks test 162.

162 needed this specific error message so it can confirm that qemu was
indeed trying to connect to the user-specified port. However, we can
also confirm this by setting up a local NBD server on exactly that port;
so we can fix the issue by doing just that.

Reported-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoiotests: Remove raciness from 162
Max Reitz [Wed, 28 Sep 2016 20:46:43 +0000 (22:46 +0200)]
iotests: Remove raciness from 162

With qemu-nbd's new --fork option, we no longer need to launch it the
hacky way.

Suggested-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoqemu-nbd: Add --fork option
Max Reitz [Wed, 28 Sep 2016 20:46:42 +0000 (22:46 +0200)]
qemu-nbd: Add --fork option

Using the --fork option, one can make qemu-nbd fork the worker process.
The original process will exit on error of the worker or once the worker
enters the main loop.

Suggested-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoqemu-iotests: Test I/O in a single drive from a throttling group
Alberto Garcia [Mon, 17 Oct 2016 15:46:03 +0000 (18:46 +0300)]
qemu-iotests: Test I/O in a single drive from a throttling group

iotest 093 contains a test that creates a throttling group with
several drives and performs I/O in all of them. This patch adds a new
test that creates a similar setup but only performs I/O in one of the
drives at the same time.

This is useful to test that the round robin algorithm is behaving
properly in these scenarios, and is specifically written using the
regression introduced in 27ccdd52598290f0f8b58be56e as an example.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agothrottle: Correct access to wrong BlockBackendPublic structures
Alberto Garcia [Mon, 17 Oct 2016 15:46:02 +0000 (18:46 +0300)]
throttle: Correct access to wrong BlockBackendPublic structures

In 27ccdd52598290f0f8b58be56e235aff7aebfaf3 the throttling fields were
moved from BlockDriverState to BlockBackend. However in a few cases
the code started using throttling fields from the active BlockBackend
instead of the round-robin token, making the algorithm behave
incorrectly.

This can cause starvation if there's a throttling group with several
drives but only one of them has I/O.

Cc: qemu-stable@nongnu.org
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoqapi: fix memory leak in bdrv_image_info_specific_dump
Pino Toscano [Tue, 18 Oct 2016 10:37:42 +0000 (12:37 +0200)]
qapi: fix memory leak in bdrv_image_info_specific_dump

The 'obj' result of the visitor was not properly freed, like done in
other places doing a similar job.

Signed-off-by: Pino Toscano <ptoscano@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoblock: improve error handling in raw_open
Halil Pasic [Tue, 11 Oct 2016 14:12:35 +0000 (16:12 +0200)]
block: improve error handling in raw_open

Make raw_open for POSIX more consistent in handling errors by setting
the error object also when qemu_open fails. The error object was set
generally set in case of errors, but I guess this case was overlooked.
Do the same for win32.

Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> (POSIX only)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoblock: Remove "options" indirection from blockdev-add
Kevin Wolf [Fri, 7 Oct 2016 15:05:04 +0000 (17:05 +0200)]
block: Remove "options" indirection from blockdev-add

Now that QAPI supports boxed types, we can have unions at the top level
of a command, so let's put our real options directly there for
blockdev-add instead of having a single "options" dict that contains the
real arguments.

blockdev-add is still experimental and we already made substantial
changes to the API recently, so we're free to make changes like this
one, too.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
7 years agoqcow2: Support BDRV_REQ_MAY_UNMAP
Fam Zheng [Wed, 28 Sep 2016 07:04:21 +0000 (15:04 +0800)]
qcow2: Support BDRV_REQ_MAY_UNMAP

Handling this is similar to what is done to the L2 entry in the case of
compressed clusters.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoblock: failed qemu-img command should return non-zero exit code
Xu Tian [Sun, 9 Oct 2016 09:17:27 +0000 (17:17 +0800)]
block: failed qemu-img command should return non-zero exit code

If the backing file cannot be opened when doing qemu-img rebase, the
variable 'ret' was not assigned a non-zero value, and the qemu-img
process terminated with exit code zero. Fix this.

Signed-off-by: Xu Tian <xutian@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
7 years agoi2c: Add asserts for second smbus i2c_start_transfer()
Corey Minyard [Mon, 24 Oct 2016 15:42:33 +0000 (10:42 -0500)]
i2c: Add asserts for second smbus i2c_start_transfer()

Some SMBus operations restart the transfer to convert from
write to read mode without an intervening i2c_end_transfer().
The second call cannot fail, so the return code is unchecked,
but this causes Coverity to complain.  So add some asserts
and documentation about this.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotarget-arm: Implement new HLT trap for semihosting
Peter Maydell [Mon, 24 Oct 2016 15:26:56 +0000 (16:26 +0100)]
target-arm: Implement new HLT trap for semihosting

Version 2.0 of the semihosting specification introduces new trap
instructions for AArch32: HLT 0xF000 for A32 and HLT 0x3C for T32.
Implement these (in the same way we implement the existing HLT
semihosting trap for A64).

The old traps via SVC and BKPT are unaffected.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1476792973-18508-1-git-send-email-peter.maydell@linaro.org

7 years agohw/display: QOM'ify pl110.c
xiaoqiang zhao [Mon, 24 Oct 2016 15:26:56 +0000 (16:26 +0100)]
hw/display: QOM'ify pl110.c

Drop the old Sysbus init and use instance_init and
DeviceClass::realize instead

Signed-off-by: xiaoqiang zhao <zxq_yx_007@163.com>
Message-id: 20161023091816.3839-5-zxq_yx_007@163.com
[PMM: added accidentally dropped blank line]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/arm: QOM'ify strongarm.c
xiaoqiang zhao [Mon, 24 Oct 2016 15:26:56 +0000 (16:26 +0100)]
hw/arm: QOM'ify strongarm.c

Drop the old Sysbus init and use instance_init and
DeviceClass::realize instead

Signed-off-by: xiaoqiang zhao <zxq_yx_007@163.com>
Message-id: 20161023091816.3839-4-zxq_yx_007@163.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/arm: QOM'ify pxa2xx_gpio.c
xiaoqiang zhao [Mon, 24 Oct 2016 15:26:55 +0000 (16:26 +0100)]
hw/arm: QOM'ify pxa2xx_gpio.c

Drop the old Sysbus init and use instance_init and
DeviceClass::realize instead

Signed-off-by: xiaoqiang zhao <zxq_yx_007@163.com>
Message-id: 20161023091816.3839-3-zxq_yx_007@163.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/arm: QOM'ify musicpal.c
xiaoqiang zhao [Mon, 24 Oct 2016 15:26:55 +0000 (16:26 +0100)]
hw/arm: QOM'ify musicpal.c

Drop the old Sysbus init and use instance_init and
DeviceClass::realize instead

Signed-off-by: xiaoqiang zhao <zxq_yx_007@163.com>
Message-id: 20161023091816.3839-2-zxq_yx_007@163.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotimer: stm32f2xx_timer: add check for prescaler value
Prasad J Pandit [Mon, 24 Oct 2016 15:26:55 +0000 (16:26 +0100)]
timer: stm32f2xx_timer: add check for prescaler value

The STM32F2XX Timer emulator uses a 16 bit prescaler value to
limit the timer clock rate. It does that by dividing the timer
frequency. If the prescaler 's->tim_psc' was set to be UINT_MAX,
it'd lead to divide by zero error. Limit prescaler value to 16
bits to avoid it.

Reported-by: Huawei PSIRT <psirt@huawei.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-id: 1476800269-31902-1-git-send-email-ppandit@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoi2c: Fix SMBus read transactions to avoid double events
Corey Minyard [Mon, 24 Oct 2016 15:26:55 +0000 (16:26 +0100)]
i2c: Fix SMBus read transactions to avoid double events

Change 2293c27faddf (i2c: implement broadcast write) added broadcast
capability to the I2C bus, but it broke SMBus read transactions.
An SMBus read transaction does two i2c_start_transaction() calls
without an intervening i2c_end_transfer() call.  This will
result in i2c_start_transfer() adding the same device to the
current_devs list twice, and then the ->event() for the same
device gets called twice in the second call to i2c_start_transfer(),
resulting in the smbus code getting confused.

Note that this happens even with pure I2C devices when simulating
SMBus over I2C.

This fix only scans the bus if the current set of devices is empty.
This means that the current set of devices stays fixed until
i2c_end_transfer() is called, which is really what you want.

This also deletes the empty check from the top of i2c_end_transfer().
It's unnecessary, and it prevents the broadcast variable from being
set to false at the end of the transaction if no devices were on
the bus.

Cc: KONRAD Frederic <fred.konrad@greensocs.com>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Kwon <hyun.kwon@xilinx.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: KONRAD Frederic <fred.konrad@greensocs.com>
Tested-by: KONRAD Frederic <fred.konrad@greensocs.com>
Message-id: 1470153614-6657-1-git-send-email-minyard@acm.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotimer: a9gtimer: remove loop to auto-increment comparator
Prasad J Pandit [Mon, 24 Oct 2016 15:26:54 +0000 (16:26 +0100)]
timer: a9gtimer: remove loop to auto-increment comparator

ARM A9MP processor has a peripheral timer with an auto-increment
register, which holds an increment step value. A user could set
this value to zero. When auto-increment control bit is enabled,
it leads to an infinite loop in 'a9_gtimer_update' while
updating comparator value. Remove this loop incrementing the
comparator value.

Reported-by: Li Qiang <liqiang6-s@360.cn>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-id: 1476733226-11635-1-git-send-email-ppandit@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoARM: Virt: ACPI: Build an IORT table with RC and ITS nodes
Prem Mallappa [Mon, 24 Oct 2016 15:26:54 +0000 (16:26 +0100)]
ARM: Virt: ACPI: Build an IORT table with RC and ITS nodes

This patch builds an IORT table that features a root complex node and
an ITS node. This complements the ITS description in the ACPI MADT
table and allows vhost-net on ACPI guest.

Signed-off-by: Prem Mallappa <prem.mallappa@broadcom.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-id: 1476707466-14300-3-git-send-email-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoACPI: Add IORT Structure definition
Prem Mallappa [Mon, 24 Oct 2016 15:26:54 +0000 (16:26 +0100)]
ACPI: Add IORT Structure definition

ACPI Spec 6.0 introduces IO Remapping Table Structure. This patch
introduces the definitions required to describe the IO relationship
between the PCIe root complex and the ITS.

This conforms to:
"IO Remapping Table System Software on ARM Platforms",
Document number: ARM DEN 0049B, October 2015.

Signed-off-by: Prem Mallappa <prem.mallappa@broadcom.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-id: 1476707466-14300-2-git-send-email-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: Add tests for the ARM MPTimer
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:54 +0000 (16:26 +0100)]
tests: Add tests for the ARM MPTimer

ARM MPTimer is a per-CPU core timer, essential part of the ARM Cortex-A9
MPCore. Add QTests for it.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 1c9a2f1c80f87e935b4a28919457c81b6b2256e9.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoarm_mptimer: Convert to use ptimer
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:53 +0000 (16:26 +0100)]
arm_mptimer: Convert to use ptimer

Current ARM MPTimer implementation uses QEMUTimer for the actual timer,
this implementation isn't complete and mostly tries to duplicate of what
generic ptimer is already doing fine.

Conversion to ptimer brings the following benefits and fixes:
- Simple timer pausing implementation
- Fixes counter value preservation after stopping the timer
- Properly handles prescaler != 0 / counter = 0 / load = 0 cases
- Code simplification and reduction

Bump VMSD to version 3, since VMState is changed and is not compatible
with the previous implementation.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Message-id: 37f378c33bb5a28d5cd71167a6bd5bff5e59cbc3.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: ptimer: Replace 10000 with 1
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:53 +0000 (16:26 +0100)]
tests: ptimer: Replace 10000 with 1

The 10000 is an arbitrarily chosen value used for advancing the QEMU
time, so that ptimer's now != last. Change it to 1 to make code a bit
more readable.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 63256eaac54c84dac7c797f41296cc49e751d09d.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: ptimer: Change the copyright comment
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:53 +0000 (16:26 +0100)]
tests: ptimer: Change the copyright comment

Eric Blake suggested that use of "Author:" in the copyright text of the
files created by individuals is incorrect, replace it with "Copyright".

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 9d8b626f462d4a5094b1945fbd763b8a2e28dd86.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: ptimer: Add tests for "no counter round down" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:53 +0000 (16:26 +0100)]
tests: ptimer: Add tests for "no counter round down" policy

PTIMER_POLICY_NO_COUNTER_ROUND_DOWN makes ptimer_get_count() return the
actual counter value and not the one less.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 0082889309b3dc66c03c8de00b8c1ef40c1e3955.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/ptimer: Add "no counter round down" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:52 +0000 (16:26 +0100)]
hw/ptimer: Add "no counter round down" policy

For most of the timers counter starts to decrement after first period
expires. Due to rounding down performed by the ptimer_get_count, it returns
counter - 1 for the running timer, so that for the ptimer user it looks
like counter gets decremented immediately after running the timer. Add "no
counter round down" policy that provides correct behaviour for those timers.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: ef39622d0ebfdc32a0877e59ffdf6910dc3db688.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: ptimer: Add tests for "no immediate reload" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:52 +0000 (16:26 +0100)]
tests: ptimer: Add tests for "no immediate reload" policy

PTIMER_POLICY_NO_IMMEDIATE_RELOAD makes ptimer to not to re-load
counter on setting counter value to "0" or starting to run with "0".

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: a7acf805e447cc7f637ecacbd45cca34ea3bf425.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/ptimer: Add "no immediate reload" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:52 +0000 (16:26 +0100)]
hw/ptimer: Add "no immediate reload" policy

Immediate counter re-load on setting (or on starting to run with)
counter = 0 is a wrong behaviour for some of the timers. Add "no
immediate reload" policy that provides correct behaviour for such timers.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: bf9385cd2550ca451d564fa46007688cee3f3d9d.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: ptimer: Add tests for "no immediate trigger" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:52 +0000 (16:26 +0100)]
tests: ptimer: Add tests for "no immediate trigger" policy

PTIMER_POLICY_NO_IMMEDIATE_TRIGGER makes ptimer to not to trigger on starting
to run with / setting counter to "0".

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 12b1e745f90fe2ca3d59197166bc3d379260f912.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/ptimer: Add "no immediate trigger" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:51 +0000 (16:26 +0100)]
hw/ptimer: Add "no immediate trigger" policy

Performing trigger on setting (or starting to run with) counter = 0 could
be a wrong behaviour for some of the timers, provide "no immediate trigger"
policy to maintain correct behaviour for such timers.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 72c0319cf2ec599f22397b7da280c06c34dc40dd.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: ptimer: Add tests for "continuous trigger" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:51 +0000 (16:26 +0100)]
tests: ptimer: Add tests for "continuous trigger" policy

PTIMER_POLICY_CONTINUOUS_TRIGGER makes periodic ptimer to re-trigger every
period in case of load = delta = 0.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 7a908ab38b902d521eb959941f9efe2df8ce4297.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/ptimer: Add "continuous trigger" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:51 +0000 (16:26 +0100)]
hw/ptimer: Add "continuous trigger" policy

Currently, periodic timer that has load = delta = 0 performs trigger
on timer reload and stops, printing a "period zero" error message.
Introduce new policy that makes periodic timer to continuously trigger
with a period interval in case of load = 0.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 632b23dd11055d9bd5e338d66b38fac0bd51462e.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agotests: ptimer: Add tests for "wraparound after one period" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:51 +0000 (16:26 +0100)]
tests: ptimer: Add tests for "wraparound after one period" policy

PTIMER_POLICY_WRAP_AFTER_ONE_PERIOD changes ptimer behaviour in a such way,
that it would wrap around after one period instead of doing it immediately.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: ce27bb84ed9f2b64300dd4e90f3eff235a7dcedf.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/ptimer: Add "wraparound after one period" policy
Dmitry Osipenko [Mon, 24 Oct 2016 15:26:50 +0000 (16:26 +0100)]
hw/ptimer: Add "wraparound after one period" policy

Currently, periodic counter wraps around immediately once counter reaches
"0", this is wrong behaviour for some of the timers, resulting in one period
being lost. Add new ptimer policy that provides correct behaviour for such
timers, so that counter stays with "0" for a one period before wrapping
around.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: f22a670cf1f4be298b31640cb5f4be1df0f20ab6.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agohw/arm/virt: Set minimum_page_bits to 12
Peter Maydell [Mon, 24 Oct 2016 15:26:50 +0000 (16:26 +0100)]
hw/arm/virt: Set minimum_page_bits to 12

Since the virt board model will never create a CPU which is
pre-ARMv7, we know that our minimum page size is 4K and can
set minimum_page_bits accordingly, for improved performance.

Note that this is a migration compatibility break, so
we introduce it only for the virt-2.8 machine and onward;
virt-2.7 continues using the old 1K pages.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
7 years agotarget-arm: Make page size a runtime setting
Peter Maydell [Mon, 24 Oct 2016 15:26:50 +0000 (16:26 +0100)]
target-arm: Make page size a runtime setting

Rather than defining TARGET_PAGE_BITS to always be 10,
switch to using a value picked at runtime. This allows us
to use 4K pages for modern ARM CPUs (and in particular all
64-bit CPUs) without having to drop support for the old
ARMv5 CPUs which had 1K pages.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
7 years agomigration/savevm.c: migrate non-default page size
Peter Maydell [Mon, 24 Oct 2016 15:26:50 +0000 (16:26 +0100)]
migration/savevm.c: migrate non-default page size

Add a subsection to vmstate_configuration which is present
only if the guest is using a target page size which is
different from the default. This allows us to helpfully
diagnose attempts to migrate between machines which
are using different target page sizes.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
7 years agocpu: Support a target CPU having a variable page size
Peter Maydell [Mon, 24 Oct 2016 15:26:49 +0000 (16:26 +0100)]
cpu: Support a target CPU having a variable page size

Support target CPUs having a page size which isn't knownn
at compile time. To use this, the CPU implementation should:
 * define TARGET_PAGE_BITS_VARY
 * not define TARGET_PAGE_BITS
 * define TARGET_PAGE_BITS_MIN to the smallest value it
   might possibly want for TARGET_PAGE_BITS
 * call set_preferred_target_page_bits() in its realize
   function to indicate the actual preferred target page
   size for the CPU (and report any error from it)

In CONFIG_USER_ONLY, the CPU implementation should continue
to define TARGET_PAGE_BITS appropriately for the guest
OS page size.

Machines which want to take advantage of having the page
size something larger than TARGET_PAGE_BITS_MIN must
set the MachineClass minimum_page_bits field to a value
which they guarantee will be no greater than the preferred
page size for any CPU they create.

Note that changing the target page size by setting
minimum_page_bits is a migration compatibility break
for that machine.

For debugging purposes, attempts to use TARGET_PAGE_SIZE
before it has been finally confirmed will assert.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
7 years agotranslate-all.c: Compute L1 page table properties at runtime
Vijaya Kumar K [Mon, 24 Oct 2016 15:26:49 +0000 (16:26 +0100)]
translate-all.c: Compute L1 page table properties at runtime

Remove L1 page mapping table properties computing
statically using macros which is dependent on
TARGET_PAGE_BITS. Drop macros V_L1_SIZE, V_L1_SHIFT,
V_L1_BITS macros and replace with variables which are
computed at early stage of VM boot.

Removing dependency can help to make TARGET_PAGE_BITS
dynamic.

Signed-off-by: Vijaya Kumar K <vijayak@cavium.com>
Message-id: 1465808915-4887-4-git-send-email-vijayak@caviumnetworks.com
[PMM:
 assert(v_l1_shift % V_L2_BITS == 0)
 cache v_l2_levels
 initialize from page_init() rather than vl.c
 minor code style fixes
 put v_l1_size into a local where used as a loop limit]
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoexec.c: Remove static allocation of sub_section of sub_page
Vijaya Kumar K [Mon, 24 Oct 2016 15:26:49 +0000 (16:26 +0100)]
exec.c: Remove static allocation of sub_section of sub_page

Allocate sub_section dynamically. Remove dependency
on TARGET_PAGE_SIZE to make run-time page size detection
for arm platforms.

Signed-off-by: Vijaya Kumar K <vijayak@cavium.com>
Message-id: 1465808915-4887-3-git-send-email-vijayak@caviumnetworks.com
[PMM: use flexible array member rather than separate malloc
 so we don't need an extra pointer deref when using it]
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agomigration: Remove static allocation of xzblre cache buffer
Vijaya Kumar K [Mon, 24 Oct 2016 15:26:49 +0000 (16:26 +0100)]
migration: Remove static allocation of xzblre cache buffer

Allocate xzblre zero page cache buffer dynamically.
Remove dependency on TARGET_PAGE_SIZE to make run-time
page size detection for arm platforms.

Signed-off-by: Vijaya Kumar K <vijayak@cavium.com>
Message-id: 1465808915-4887-2-git-send-email-vijayak@caviumnetworks.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoMerge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
Peter Maydell [Mon, 24 Oct 2016 14:03:09 +0000 (15:03 +0100)]
Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* KVM run_on_cpu fix (Alex)
* atomic usage fixes (Emilio, me)
* hugetlbfs alignment fix (Haozhong)
* CharBackend refactoring (Marc-André)
* test-i386 fixes (me)
* MemoryListener optimizations (me)
* Miscellaneous bugfixes (me)
* iSER support (Roy)
* --version formatting (Thomas)

# gpg: Signature made Mon 24 Oct 2016 14:46:19 BST
# gpg:                using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (50 commits)
  exec.c: workaround regression caused by alignment change in d2f39ad
  char: remove explicit_be_open from CharDriverState
  char: use common error path in qmp_chardev_add
  char: replace avail_connections
  char: remove unused qemu_chr_fe_event
  char: use an enum for CHR_EVENT
  char: remove unused CHR_EVENT_FOCUS
  char: move fe_open in CharBackend
  char: remove explicit_fe_open, use a set_handlers argument
  char: rename chr_close/chr_free
  char: move front end handlers in CharBackend
  tests: start chardev unit tests
  char: make some qemu_chr_fe skip if no driver
  char: replace qemu_chr_claim/release with qemu_chr_fe_init/deinit
  vhost-user: only initialize queue 0 CharBackend
  char: fold qemu_chr_set_handlers in qemu_chr_fe_set_handlers
  char: use qemu_chr_fe* functions with CharBackend argument
  colo: claim in find_and_check_chardev
  char: rename some frontend functions
  char: remaining switch to CharBackend in frontend
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
7 years agoexec.c: workaround regression caused by alignment change in d2f39ad
Haozhong Zhang [Mon, 24 Oct 2016 12:49:37 +0000 (20:49 +0800)]
exec.c: workaround regression caused by alignment change in d2f39ad

Commit d2f39ad "exec.c: Ensure right alignment also for file backed ram"
added an additional alignment requirement on the size of backend file
besides the previous page size. On x86, the alignment is changed from
4KB in QEMU 2.6 to 2MB in QEMU 2.7.

This change breaks certain usages in QEMU 2.7 on x86, e.g.
    -object memory-backend-file,id=mem1,mem-path=/tmp/,size=$SZ
    -device pc-dimm,id=dimm1,memdev=mem1
where $SZ is multiple of 4KB but not 2MB (e.g. 1023M). QEMU 2.7
reports the following error message and aborts:
qemu-system-x86_64: -device pc-dimm,memdev=mem1,id=nv1: backend memory size must be multiple of 0x200000

The same regression may also happen in other platforms as indicated by
Igor Mammedov. This change is however necessary for s390 according to
the commit message of d2f39ad, so we workaround the regression by taking
the change only on s390.

Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Reported-by: "Xu, Anthony" <anthony.xu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: remove explicit_be_open from CharDriverState
Marc-André Lureau [Sat, 22 Oct 2016 10:09:43 +0000 (13:09 +0300)]
char: remove explicit_be_open from CharDriverState

It's only used in qmp_chardev_add(), so use a create() argument instead.

Also switched to typedef functions for CharDriverParse/CharDriverCreate.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-7-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: use common error path in qmp_chardev_add
Marc-André Lureau [Sat, 22 Oct 2016 10:09:42 +0000 (13:09 +0300)]
char: use common error path in qmp_chardev_add

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-6-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: replace avail_connections
Marc-André Lureau [Sat, 22 Oct 2016 10:09:41 +0000 (13:09 +0300)]
char: replace avail_connections

No need to count the users of a CharDriverState, it can rely on the fact
of whether there is a CharBackend associated or if there is enough space
in the muxer.

Simplify and fold chr_mux_new_fe() in qemu_chr_fe_init() since there is
a single user now. Also switch from fprintf to raising error instead.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-5-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: remove unused qemu_chr_fe_event
Marc-André Lureau [Sat, 22 Oct 2016 10:09:40 +0000 (13:09 +0300)]
char: remove unused qemu_chr_fe_event

I introduced this function in d61b0c9a2f7f, but it isn't
used. Furthermore, it was incomplete, as it would need to translate QEMU
chr events to Spice port events.

(presumably it was used in the follow-up NBD-spice series that was not
completed: http://lists.gnu.org/archive/html/qemu-devel/2013-11/msg02024.html)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-4-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: use an enum for CHR_EVENT
Marc-André Lureau [Sat, 22 Oct 2016 10:09:39 +0000 (13:09 +0300)]
char: use an enum for CHR_EVENT

This may help to catch unhandled cases, and avoid having to maintain
numbering.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-3-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: remove unused CHR_EVENT_FOCUS
Marc-André Lureau [Sat, 22 Oct 2016 10:09:38 +0000 (13:09 +0300)]
char: remove unused CHR_EVENT_FOCUS

Usage has long been removed, since commit f220174de8d9.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-2-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: move fe_open in CharBackend
Marc-André Lureau [Sat, 22 Oct 2016 10:09:37 +0000 (13:09 +0300)]
char: move fe_open in CharBackend

The fe_open state belongs to front end.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022100951.19562-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: remove explicit_fe_open, use a set_handlers argument
Marc-André Lureau [Sat, 22 Oct 2016 09:53:03 +0000 (12:53 +0300)]
char: remove explicit_fe_open, use a set_handlers argument

No need to keep explicit_fe_open around if it affects only a
qemu_chr_fe_set_handlers(). Use an additional argument instead.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-24-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: rename chr_close/chr_free
Marc-André Lureau [Sat, 22 Oct 2016 09:53:02 +0000 (12:53 +0300)]
char: rename chr_close/chr_free

The function is used to free the backend opaque pointer, let's name it
accordingly.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-23-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: move front end handlers in CharBackend
Marc-André Lureau [Sat, 22 Oct 2016 09:53:01 +0000 (12:53 +0300)]
char: move front end handlers in CharBackend

Since the hanlders are associated with a CharBackend, rather than the
CharDriverState, it is more appropriate to store in CharBackend. This
avoids the handler copy dance in qemu_chr_fe_set_handlers() then
mux_chr_update_read_handler(), by storing the CharBackend pointer
directly.

Also a mux CharDriver should go through mux->backends[focused], since
chr->be will stay NULL. Before that, it was possible to call
chr->handler by mistake with surprising results, for ex through
qemu_chr_be_can_write(), which would result in calling the last set
handler front end, not the one with focus.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-22-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agotests: start chardev unit tests
Marc-André Lureau [Sat, 22 Oct 2016 09:53:00 +0000 (12:53 +0300)]
tests: start chardev unit tests

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-21-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: make some qemu_chr_fe skip if no driver
Marc-André Lureau [Sat, 22 Oct 2016 09:52:59 +0000 (12:52 +0300)]
char: make some qemu_chr_fe skip if no driver

In most cases, front ends do not care about the side effect of
CharBackend, so we can simply skip the checks and call the qemu_chr_fe
functions even without associated CharDriver.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-20-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: replace qemu_chr_claim/release with qemu_chr_fe_init/deinit
Marc-André Lureau [Sat, 22 Oct 2016 09:52:58 +0000 (12:52 +0300)]
char: replace qemu_chr_claim/release with qemu_chr_fe_init/deinit

Now that all front end use qemu_chr_fe_init(), we can move chardev
claiming in init(), and add a function deinit() to release the chardev
and cleanup handlers.

The qemu_chr_fe_claim_no_fail() for property are gone, since the
property will raise an error instead. In other cases, where there is
already an error path, an error is raised instead. Finally, other cases
are handled by &error_abort in qemu_chr_fe_init().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-19-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agovhost-user: only initialize queue 0 CharBackend
Marc-André Lureau [Sat, 22 Oct 2016 09:52:57 +0000 (12:52 +0300)]
vhost-user: only initialize queue 0 CharBackend

All the queues share the same chardev. Initialize only the first queue
CharBackend, and pass it to other queues. This will allow to claim the
chardev only once in a later change.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-18-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: fold qemu_chr_set_handlers in qemu_chr_fe_set_handlers
Marc-André Lureau [Sat, 22 Oct 2016 09:52:56 +0000 (12:52 +0300)]
char: fold qemu_chr_set_handlers in qemu_chr_fe_set_handlers

qemu_chr_add_handlers*() have been removed in previous change, so the
common qemu_chr_set_handlers() is no longer needed.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-17-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: use qemu_chr_fe* functions with CharBackend argument
Marc-André Lureau [Sat, 22 Oct 2016 09:52:55 +0000 (12:52 +0300)]
char: use qemu_chr_fe* functions with CharBackend argument

This also switches from qemu_chr_add_handlers() to
qemu_chr_fe_set_handlers(). Note that qemu_chr_fe_set_handlers() now
takes the focus when fe_open (qemu_chr_add_handlers() did take the
focus)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-16-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agocolo: claim in find_and_check_chardev
Marc-André Lureau [Sat, 22 Oct 2016 09:52:54 +0000 (12:52 +0300)]
colo: claim in find_and_check_chardev

This factors out claiming of chardev, and changes the call to
non-fatal to return an error like the rest of the chardev checks.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-15-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: rename some frontend functions
Marc-André Lureau [Sat, 22 Oct 2016 09:52:53 +0000 (12:52 +0300)]
char: rename some frontend functions

qemu_chr_accept_input() and qemu_chr_disconnect() are only used by
frontend, so use qemu_chr_fe prefix.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-14-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: remaining switch to CharBackend in frontend
Marc-André Lureau [Sat, 22 Oct 2016 09:52:52 +0000 (12:52 +0300)]
char: remaining switch to CharBackend in frontend

Similar to previous change, for the remaining CharDriverState front ends
users.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-13-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: replace PROP_CHR with CharBackend
Marc-André Lureau [Sat, 22 Oct 2016 09:52:51 +0000 (12:52 +0300)]
char: replace PROP_CHR with CharBackend

Store the property in a CharBackend instead of CharDriverState*.  This
also replace systematically chr by chr.chr to access the
CharDriverState*. The following patches will replace it with calls to
qemu_chr_fe CharBackend functions.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-12-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: start converting mux driver to use CharBackend
Marc-André Lureau [Sat, 22 Oct 2016 09:52:50 +0000 (12:52 +0300)]
char: start converting mux driver to use CharBackend

Start using qemu_chr_fe* CharBackend functions:
initialize a CharBackend and use qemu_chr_fe_set_handlers().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-11-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: introduce CharBackend
Marc-André Lureau [Sat, 22 Oct 2016 09:52:49 +0000 (12:52 +0300)]
char: introduce CharBackend

This new structure is meant to keep the details associated with a char
driver usage. On initialization, it gets a tag from the mux backend.
It can change its handlers thanks to qemu_chr_fe_set_handlers().

This structure is introduced so that all frontend will be moved to hold
and use a CharBackend. This will allow to better track char usage and
allocation, and help prevent some memory leaks or corruption.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-10-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agomux: split mux_chr_update_read_handler()
Marc-André Lureau [Sat, 22 Oct 2016 09:52:48 +0000 (12:52 +0300)]
mux: split mux_chr_update_read_handler()

Make qemu_chr_add_handlers_full() aware of mux handling. This allows
introduction of a tag associated with the fe handlers and a
qemu_chr_set_handlers() function to set the handler for a particular
tag. That will allow to get rid of qemu_chr_add_handlers*() in later
changes, in favor of qemu_chr_fe_set_handler().

To this end, chr_update_read_handler callback is enhanced with a tag
argument, and mux_chr_update_read_handler() is splitted in new
functions: mux_chr_new_handler_tag(), mux_chr_set_handlers(),
mux_set_focus().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-9-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agoxilinx: fix buffer overflow on realize
Paolo Bonzini [Sun, 23 Oct 2016 15:42:22 +0000 (17:42 +0200)]
xilinx: fix buffer overflow on realize

ASAN complains about buffer overflow when running:
aarch64-softmmu/qemu-system-aarch64 -machine xilinx-zynq-a9

==476==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000035e38 at pc 0x000000f75253 bp 0x7ffc597e0ec0 sp 0x7ffc597e0eb0
READ of size 8 at 0x602000035e38 thread T0
    #0 0xf75252 in xilinx_spips_realize hw/ssi/xilinx_spips.c:623
    #1 0xb9ef6c in device_set_realized hw/core/qdev.c:918
    #2 0x129ae01 in property_set_bool qom/object.c:1854
    #3 0x1296e70 in object_property_set qom/object.c:1088
    #4 0x129dd1b in object_property_set_qobject qom/qom-qobject.c:27
    #5 0x1297168 in object_property_set_bool qom/object.c:1157
    #6 0xb9aeac in qdev_init_nofail hw/core/qdev.c:358
    #7 0x78a5bf in zynq_init_spi_flashes /home/elmarco/src/qemu/hw/arm/xilinx_zynq.c:125
    #8 0x78af60 in zynq_init /home/elmarco/src/qemu/hw/arm/xilinx_zynq.c:238
    #9 0x998eac in main /home/elmarco/src/qemu/vl.c:4534
    #10 0x7f96ed692730 in __libc_start_main (/lib64/libc.so.6+0x20730)
    #11 0x41d0a8 in _start (/home/elmarco/src/qemu/aarch64-softmmu/qemu-system-aarch64+0x41d0a8)

0x602000035e38 is located 0 bytes to the right of 8-byte region [0x602000035e30,0x602000035e38)
allocated by thread T0 here:
    #0 0x7f970b014e60 in malloc (/lib64/libasan.so.3+0xc6e60)
    #1 0x7f96f15b0e18 in g_malloc (/lib64/libglib-2.0.so.0+0x4ee18)
    #2 0xb9ef6c in device_set_realized hw/core/qdev.c:918
    #3 0x129ae01 in property_set_bool qom/object.c:1854
    #4 0x1296e70 in object_property_set qom/object.c:1088
    #5 0x129dd1b in object_property_set_qobject qom/qom-qobject.c:27
    #6 0x1297168 in object_property_set_bool qom/object.c:1157
    #7 0xb9aeac in qdev_init_nofail hw/core/qdev.c:358
    #8 0x78a5bf in zynq_init_spi_flashes /home/elmarco/src/qemu/hw/arm/xilinx_zynq.c:125
    #9 0x78af60 in zynq_init /home/elmarco/src/qemu/hw/arm/xilinx_zynq.c:238
    #10 0x998eac in main /home/elmarco/src/qemu/vl.c:4534
    #11 0x7f96ed692730 in __libc_start_main (/lib64/libc.so.6+0x20730)

s->spi is allocated with the size of num_busses which may be 1 (by
default).  Change to use a loop up to s->num_busses also for the
call to ssi_auto_connect_slaves().

Reported-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: remove init callback
Marc-André Lureau [Sat, 22 Oct 2016 09:52:46 +0000 (12:52 +0300)]
char: remove init callback

The CharDriverState.init() callback is no longer set since commit
a61ae7f88ce and thus unused. The only user, the malta FGPA display has
been converted to use an event "opened" callback instead.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-7-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agomalta: replace chr init by CHR_EVENT_OPENED handler
Marc-André Lureau [Sat, 22 Oct 2016 09:52:45 +0000 (12:52 +0300)]
malta: replace chr init by CHR_EVENT_OPENED handler

The CharDriverState.init() callback was introduced in commit
ceecf1d158. It is only called from text_console_do_init(), but it is no
longer set since commit a61ae7f88 (init assignment has been removed by
accident).

It seems correct to use an event callback instead and print the console
text on CHR_EVENT_OPENED. That way we can remove the single user of
CharDriverState init().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-6-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agosun4uv: fix serial initialization regression
Marc-André Lureau [Sat, 22 Oct 2016 09:52:44 +0000 (12:52 +0300)]
sun4uv: fix serial initialization regression

Since commit b6607a1a204d, serial_hds_isa_init() was introduced to
factor out serial_isa_init() loops. However, sun4uv shouldn't start from
0 when there is a mm serial on 0 already. Add a "from" argument to
serial_hds_isa_init().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-5-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agoringbuf: fix chr_write return value
Marc-André Lureau [Sat, 22 Oct 2016 09:52:43 +0000 (12:52 +0300)]
ringbuf: fix chr_write return value

It should return the number of written bytes.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-4-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: remove use-after-free on win-stdio
Marc-André Lureau [Sat, 22 Oct 2016 09:52:42 +0000 (12:52 +0300)]
char: remove use-after-free on win-stdio

Found by reviewing the code, win_stdio_close() is called by
qemu_chr_free() which then call qemu_chr_free_common() taking care of
freeing CharDriverState*.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-3-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agorng: remove unused included header
Marc-André Lureau [Sat, 22 Oct 2016 09:52:41 +0000 (12:52 +0300)]
rng: remove unused included header

DEFINE_PROP_CHR is not used (rng is not of TYPE_DEVICE)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-2-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar.h: misc doc fix
Marc-André Lureau [Tue, 11 Oct 2016 15:20:12 +0000 (19:20 +0400)]
char.h: misc doc fix

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161011152012.3228-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agochar: serial: check divider value against baud base
Prasad J Pandit [Wed, 12 Oct 2016 05:58:08 +0000 (11:28 +0530)]
char: serial: check divider value against baud base

16550A UART device uses an oscillator to generate frequencies
(baud base), which decide communication speed. This speed could
be changed by dividing it by a divider. If the divider is
greater than the baud base, speed is set to zero, leading to a
divide by zero error. Add check to avoid it.

Reported-by: Huawei PSIRT <psirt@huawei.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <1476251888-20238-1-git-send-email-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agomemory: optimize memory_region_sync_dirty_bitmap
Paolo Bonzini [Fri, 23 Sep 2016 09:08:54 +0000 (11:08 +0200)]
memory: optimize memory_region_sync_dirty_bitmap

Avoid walking the FlatView of all address spaces.  Most of the
address spaces will have no log_sync callback on their listeners.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agomemory: optimize memory_global_dirty_log_sync
Paolo Bonzini [Thu, 22 Sep 2016 14:09:08 +0000 (16:09 +0200)]
memory: optimize memory_global_dirty_log_sync

Only return a nonzero dirty_log_mask for RAM/ROM memory regions.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agomemory: add a per-AddressSpace list of listeners
Paolo Bonzini [Thu, 22 Sep 2016 14:23:06 +0000 (16:23 +0200)]
memory: add a per-AddressSpace list of listeners

This speeds up MEMORY_LISTENER_CALL noticeably.  Right now,
with many PCI devices you have N regions added to M AddressSpaces
(M = # PCI devices with bus-master enabled) and each call looks
up the whole listener list, with at least M listeners in it.
Because most of the regions in N are BARs, which are also roughly
proportional to M, the whole thing is O(M^3).  This changes it
to O(M^2), which is the best we can do without rewriting the
whole thing.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agomemory: eliminate global MemoryListeners
Paolo Bonzini [Thu, 22 Sep 2016 14:11:54 +0000 (16:11 +0200)]
memory: eliminate global MemoryListeners

There is none, so just drop the code.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agotcg: try sti when moving a constant into a dead memory temp
Paolo Bonzini [Thu, 15 Sep 2016 13:16:00 +0000 (15:16 +0200)]
tcg: try sti when moving a constant into a dead memory temp

This comes from free from unifying tcg_reg_alloc_mov and
tcg_reg_alloc_movi's handling of TEMP_VAL_CONST.  It triggers
often on moves to cc_dst, such as the following translation
of "sub $0x3c,%esp":

  before:                          after:
  subl   $0x3c,%ebp                subl   $0x3c,%ebp
  movl   %ebp,0x10(%r14)           movl   %ebp,0x10(%r14)
  movl   $0x3c,%ebx                movl   $0x3c,0x2c(%r14)
  movl   %ebx,0x2c(%r14)

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1473945360-13663-1-git-send-email-pbonzini@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agotarget-i386: fix 32-bit addresses in LEA
Paolo Bonzini [Wed, 12 Oct 2016 07:23:39 +0000 (09:23 +0200)]
target-i386: fix 32-bit addresses in LEA

This was found with test-i386.  The issue is that instructions
such as

    addr32 lea (%eax), %rax

did not perform a 32-bit extension, because the LEA translation
skipped the gen_lea_v_seg step.  That step does not just add
segments, it also takes care of extending from address size to
pointer size.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agotest-i386: fix bitrot for 64-bit
Paolo Bonzini [Wed, 12 Oct 2016 06:57:19 +0000 (08:57 +0200)]
test-i386: fix bitrot for 64-bit

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
7 years agoqht-bench: relax test_start/stop atomic accesses
Emilio G. Cota [Fri, 14 Oct 2016 09:54:51 +0000 (11:54 +0200)]
qht-bench: relax test_start/stop atomic accesses

test_start/stop are used only as flags to loop on. Barriers are unnecessary,
since no dependent data is transferred among threads apart from the flags
themselves.

This commit relaxes the three accesses to test_start/stop that were
not yet relaxed.

Signed-off-by: Emilio G. Cota <cota@braap.org>