Notifier will be used for signaling powerdown request to guest in
a more general way and intended to replace very specific
qemu_irq_rise(qemu_system_powerdown) and will allow to remove global
variable qemu_system_powerdown.
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

* origin/master:
  tcg/i386: fix build with -march < i686
  tcg: Streamline movcond_i64 using movcond_i32
  tcg: Streamline movcond_i64 using 32-bit arithmetic
  tcg: Sanity check goto_tb input
  tcg: Sanity check deposit inputs
  tcg: Add tcg_debug_assert
  tcg: Implement concat*_i64 with deposit_i64
  tcg: Emit XORI as NOT for appropriate constants
  tcg: Optimize initial inputs for ori_i64
  tcg: Emit ANDI as EXTU for appropriate constants
  tcg: Adjust descriptions of *cond opcodes
  tcg/mips: fix MIPS32(R2) detection

The movcond_i32 op has to be protected with TCG_TARGET_HAS_movcond_i32
to fix the build with -march < i686.

Thanks to Richard Henderson for the hint.
Reported-by: NAlex Barcelo <abarcelo@ac.upc.edu>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

When movcond_i32 is available we can further reduce the generated
op count from 12 to 6, and the generated code size on i686 from
88 to 74 bytes.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Avoiding 64-bit arithmetic (outside of the compare) reduces the
generated op count from 15 to 12, and the generated code size on
i686 from 105 to 88 bytes.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Checking that we don't try for idx != [01] is trivial.  Checking
that we don't issue more than one of any index requires a tad
more data and some ifdefs protecting that new variable.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Given these are constants, checking once here means everything
after can assume they're correct.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Like the C assert macro, except only enabled for CONFIG_DEBUG_TCG,
and without having to set _NDEBUG and disable all other asserts at
the same time.

The use of __builtin_unreachable (when available) gives the compiler
the same information, which may (or may not) help it optimize better.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

For tcg_gen_concat_i32_i64 we only use deposit if the host supports it.
For tcg_gen_concat32_i64 even if the host does not, as we get identical
code before and after.

Note that this relies on the ANDI -> EXTU patch for the identity claim.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Note that xori_i64 failed to perform even the minimal
optimizations promised by the README.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Copy the same optimizations from ori_i32.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Note that andi_i64 failed to perform even the minimal
optimizations promised by the README.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

The README file documented the operand ordering of the tcg_gen_*
functions.  Since we're documenting opcodes here, use the true
operand ordering.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Cc: malc <av1474@comtv.ru>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Fix the MIPS32(R2) cpu detection so that it also works with
-march=octeon. Thanks to Andrew Pinski for the hint.

Cc: Andrew Pinski <apinski@cavium.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

* kwolf/for-anthony:
  block: remove keep_read_only flag from BlockDriverState struct
  block: convert bdrv_commit() to use bdrv_reopen()
  block: vpc image file reopen
  block: vdi image file reopen
  block: vmdk image file reopen
  block: qcow image file reopen
  block: qcow2 image file reopen
  block: qed image file reopen
  block: raw image file reopen
  block: raw-posix image file reopen
  block: purge s->aligned_buf and s->aligned_buf_size from raw-posix.c
  block: use BDRV_O_NOCACHE instead of s->aligned_buf in raw-posix.c
  block: do not parse BDRV_O_CACHE_WB in block drivers
  block: move open flag parsing in raw block drivers to helper functions
  block: move aio initialization into a helper function
  block: Framework for reopening files safely
  block: make bdrv_set_enable_write_cache() modify open_flags
  block: correctly set the keep_read_only flag
  blockdev: preserve readonly and snapshot states across media changes

* stefanha/trivial-patches:
  w32: Always use standard instead of native format strings
  net/socket: Fix compiler warning (regression for MinGW)
  linux-user: Remove redundant null check and replace free by g_free
  qemu-timer: simplify qemu_run_timers
  TextConsole: saturate escape parameter in TTY_STATE_CSI
  curses: don't initialize curses when qemu is daemonized
  dtrace backend: add function to reserved words
  pflash_cfi01: Fix warning caused by unreachable code
  ioh3420: Remove unreachable code
  lm4549: Fix buffer overflow
  cadence_uart: Fix buffer overflow
  qemu-sockets: Fix potential memory leak
  qemu-ga: Remove unreachable code after g_error
  target-i386: Allow tsc-frequency to be larger then 2.147G

* afaerber/qom-cpu:
  target-alpha: Initialize env->cpu_model_str
  target-i386: Drop unused setscalar() macro
  target-i386: Kill cpudef config section support
  target-i386: x86_cpudef_setup() coding style change
  Eliminate cpus-x86_64.conf file
  target-i386: Move CPU models from cpus-x86_64.conf to C
  target-i386: Add missing CPUID_* constants
  Drop cpu_list_id macro
  target-i386: Fold -cpu ?cpuid, ?model output into -cpu help, drop ?dump
  MAINTAINERS: Add entry for QOM CPU

* bonzini/scsi-next:
  SCSI: Standard INQUIRY data should report HiSup flag as set.
  scsi-disk: use scsi_data_cdb_length
  scsi: introduce scsi_cdb_length and scsi_data_cdb_length
  scsi-disk: fix check for out-of-range LBA
  scsi-disk: introduce check_lba_range
  iSCSI: We dont need to explicitely call qemu_notify_event() any more
  iSCSI: We need to support SG_IO also from iscsi_ioctl()

* bonzini/nbd-next:
  nbd: add nbd_export_get_blockdev
  nbd: negotiate with named exports
  nbd: register named exports
  qemu-nbd: rewrite termination conditions to use a state machine
  nbd: add notification for closing an NBDExport
  nbd: track clients into NBDExport
  nbd: add reference counting to NBDExport
  nbd: do not leak nbd_trip coroutines when a connection is torn down
  nbd: make refcount interface public
  nbd: do not close BlockDriverState in nbd_export_close
  nbd: pass NBDClient to nbd_send_negotiate
  nbd: add more constants

The keep_read_only flag is no longer used, in favor of the bdrv
flag BDRV_O_ALLOW_RDWR.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Currently, bdrv_commit() reopens images r/w itself, via risky
_delete() and _open() calls. Use the new safe method for drive reopen.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

There is currently nothing that needs to be done for VPC image
file reopen.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

There is currently nothing that needs to be done for VDI reopen.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

This patch supports reopen for VMDK image files.  VMDK extents are added
to the existing reopen queue, so that the transactional model of reopen
is maintained with multiple image files.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

These are the stubs for the file reopen drivers for the qcow format.

There is currently nothing that needs to be done by the qcow driver
in reopen.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

These are the stubs for the file reopen drivers for the qcow2 format.

There is currently nothing that needs to be done by the qcow2 driver
in reopen.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

These are the stubs for the file reopen drivers for the qed format.

There is currently nothing that needs to be done by the qed driver
in reopen.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

These are the stubs for the file reopen drivers for the raw format.

There is currently nothing that needs to be done by the raw driver
in reopen.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

This is derived from the Supriya Kannery's reopen patches.

This contains the raw-posix driver changes for the bdrv_reopen_*
functions.  All changes are staged into a temporary scratch buffer
during the prepare() stage, and copied over to the live structure
during commit().  Upon abort(), all changes are abandoned, and the
live structures are unmodified.

The _prepare() will create an extra fd - either by means of a dup,
if possible, or opening a new fd if not (for instance, access
control changes).  Upon _commit(), the original fd is closed and
the new fd is used.  Upon _abort(), the duplicate/new fd is closed.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

The aligned_buf pointer and aligned_buf size are no longer used in
raw_posix.c, so remove all references to them.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Rather than check for a non-NULL aligned_buf to determine if
raw_aio_submit needs to check for alignment, check for the presence
of BDRV_O_NOCACHE in the bs->open_flags.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Block drivers should ignore BDRV_O_CACHE_WB in .bdrv_open flags,
and in the bs->open_flags.

This patch removes the code, leaving the behaviour behind as if
BDRV_O_CACHE_WB was set.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Code motion, to move parsing of open flags into a helper function.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Move AIO initialization for raw-posix block driver into a helper function.

In addition to just code motion, the aio_ctx pointer is checked for NULL,
prior to calling laio_init(), to make sure laio_init() is only run once.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

This is based on Supriya Kannery's bdrv_reopen() patch series.

This provides a transactional method to reopen multiple
images files safely.

Image files are queue for reopen via bdrv_reopen_queue(), and the
reopen occurs when bdrv_reopen_multiple() is called.  Changes are
staged in bdrv_reopen_prepare() and in the equivalent driver level
functions.  If any of the staged images fails a prepare, then all
of the images left untouched, and the staged changes for each image
abandoned.

Block drivers are passed a reopen state structure, that contains:
    * BDS to reopen
    * flags for the reopen
    * opaque pointer for any driver-specific data that needs to be
      persistent from _prepare to _commit/_abort
    * reopen queue pointer, if the driver needs to queue additional
      BDS for a reopen
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

bdrv_set_enable_write_cache() sets the bs->enable_write_cache flag,
but without the flag recorded in bs->open_flags, then next time
a reopen() is performed the enable_write_cache setting may be
inadvertently lost.

This will set the flag in open_flags, so it is preserved across
reopens.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

I believe the bs->keep_read_only flag is supposed to reflect
the initial open state of the device. If the device is initially
opened R/O, then commit operations, or reopen operations changing
to R/W, are prohibited.

Currently, the keep_read_only flag is only accurate for the active
layer, and its backing file. Subsequent images end up always having
the keep_read_only flag set.

For instance, what happens now:

[  base  ]  kro = 1, ro = 1
    |
    v
[ snap-1 ]  kro = 1, ro = 1
    |
    v
[ snap-2 ]  kro = 0, ro = 1
    |
    v
[ active ]  kro = 0, ro = 0

What we want:

[  base  ]  kro = 0, ro = 1
    |
    v
[ snap-1 ]  kro = 0, ro = 1
    |
    v
[ snap-2 ]  kro = 0, ro = 1
    |
    v
[ active ]  kro = 0, ro = 0
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

If readonly=on is given at device creation time, the ->readonly flag
needs to be set in the block driver state for this device so that
readonly-ness is preserved across media changes (qmp change command).
Similarly, to preserve the snapshot property requires ->open_flags to
be correct.
Signed-off-by: NKevin Shanahan <kmshanah@disenchant.net>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

Those functions are missing in MinGW.

Some versions of MinGW-w64 include defines for gmtime_r and localtime_r.
Older versions of these macros are buggy (they return a pointer to a
static variable), therefore we don't want them. Newer versions are
similar to the code used here, but without the memset.

The implementation which is used here is not strictly reentrant,
but sufficiently good for QEMU on w32 or w64.
Signed-off-by: NStefan Weil <sw@weilnetz.de>
[blauwirbel@gmail.com: added comment about locking]
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

GLib 2.0 include files use __printf__ for the format attribute
which resolves to native format strings on w32 hosts.

QEMU wants standard format strings instead of native format
strings, so we simply change any declaration with __printf__
to use __gnu_printf__.

This works because all basic printf functions support both
kinds of format strings.

This fixes a compiler warning:

qapi/string-output-visitor.c: In function ‘print_type_int’:
qapi/string-output-visitor.c:34:5: warning: unknown conversion type character ‘l’ in format [-Wformat]
qapi/string-output-visitor.c:34:5: warning: too many arguments for format [-Wformat-extra-args]
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NStefan Hajnoczi <stefanha@gmail.com>