提交 · 39c0564e00f85e70cc94de22035517b2f921d0a0 · openeuler / qemu

08 8月, 2011 1 次提交

[virtio-9p] Add infrastructure to support glib threads and coroutines. · 39c0564e

由 Venkateswararao Jujjuri (JV) 提交于 4月 23, 2011

This patch is originally made by Arun Bharadwaj for glib support.
Later Harsh Prateek Bora added coroutines support.
This version implemented with suggestions from
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>.
Signed-off-by: NArun R Bharadwaj <arun@linux.vnet.ibm.com>
Signed-off-by: NHarsh Prateek Bora <harsh@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

39c0564e

04 8月, 2011 2 次提交

usb-hid: split hid code to hw/hid.[ch] · dcfda673

由 Gerd Hoffmann 提交于 7月 15, 2011

Almost pure code motion.  Unstatic hid interface functions and add
them to the header file.  Some renames.  Some code style cleanups.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

dcfda673

usb: use iovecs in USBPacket · 4f4321c1

由 Gerd Hoffmann 提交于 7月 12, 2011

Zap data pointer from USBPacket, add a QEMUIOVector instead.
Add a bunch of helper functions to manage USBPacket data.
Switch over users to the new interface.

Note that USBPacket->len was used for two purposes:  First to
pass in the buffer size and second to return the number of
transfered bytes or the status code on async transfers.  There
is a new result variable for the latter.  A new status code
was added to catch uninitialized result.

Nobody creates iovecs with more than one element (yet).
Some users are (temporarely) limited to iovecs with a single
element to keep the patch size as small as possible.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

4f4321c1

03 8月, 2011 1 次提交

Simple ARP table · 1a0ca1e1

由 Fabien Chouteau 提交于 8月 03, 2011

This patch adds a simple ARP table in Slirp and also adds handling of
gratuitous ARP requests.
Signed-off-by: NFabien Chouteau <chouteau@adacore.com>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>

1a0ca1e1

02 8月, 2011 2 次提交

K
coroutines: Locks · b96e9247
由 Kevin Wolf 提交于 6月 30, 2011
```
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
```
b96e9247

block: Add bdrv_co_readv/writev · da1fa91d

由 Kevin Wolf 提交于 7月 14, 2011

Add new block driver callbacks bdrv_co_readv/writev, which work on a
QEMUIOVector like bdrv_aio_*, but don't need a callback. The function may only
be called inside a coroutine, so a block driver implementing this interface can
yield instead of blocking during I/O.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

da1fa91d

01 8月, 2011 2 次提交

coroutine: implement coroutines using gthread · d0e2fce5

由 Aneesh Kumar K.V 提交于 6月 09, 2011

On platforms that don't support makecontext(3) use gthread based
coroutine implementation.

Darwin has makecontext(3) but getcontext(3) is stubbed out to return
ENOTSUP.  Andreas Färber <andreas.faerber@web.de> debugged this and
contributed the ./configure test which solves the issue for Darwin/ppc64
(and ppc) v10.5.

[Original patch by Aneesh, made consistent with coroutine-ucontext.c and
switched to GStaticPrivate by Stefan.  Tested on Linux and OpenBSD.]
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

d0e2fce5

coroutine: introduce coroutines · 00dccaf1

由 Kevin Wolf 提交于 1月 17, 2011

Asynchronous code is becoming very complex.  At the same time
synchronous code is growing because it is convenient to write.
Sometimes duplicate code paths are even added, one synchronous and the
other asynchronous.  This patch introduces coroutines which allow code
that looks synchronous but is asynchronous under the covers.

A coroutine has its own stack and is therefore able to preserve state
across blocking operations, which traditionally require callback
functions and manual marshalling of parameters.

Creating and starting a coroutine is easy:

  coroutine = qemu_coroutine_create(my_coroutine);
  qemu_coroutine_enter(coroutine, my_data);

The coroutine then executes until it returns or yields:

  void coroutine_fn my_coroutine(void *opaque) {
      MyData *my_data = opaque;

      /* do some work */

      qemu_coroutine_yield();

      /* do some more work */
  }

Yielding switches control back to the caller of qemu_coroutine_enter().
This is typically used to switch back to the main thread's event loop
after issuing an asynchronous I/O request.  The request callback will
then invoke qemu_coroutine_enter() once more to switch back to the
coroutine.

Note that if coroutines are used only from threads which hold the global
mutex they will never execute concurrently.  This makes programming with
coroutines easier than with threads.  Race conditions cannot occur since
only one coroutine may be active at any time.  Other coroutines can only
run across yield.

This coroutines implementation is based on the gtk-vnc implementation
written by Anthony Liguori <anthony@codemonkey.ws> but it has been
significantly rewritten by Kevin Wolf <kwolf@redhat.com> to use
setjmp()/longjmp() instead of the more expensive swapcontext() and by
Paolo Bonzini <pbonzini@redhat.com> for Windows Fibers support.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

00dccaf1

22 7月, 2011 8 次提交

USB: add usb network redirection support · 69354a83

由 Hans de Goede 提交于 7月 19, 2011

This patch adds support for a usb-redir device, which takes a chardev
as a communication channel to an actual usbdevice using the usbredir protocol.

Compiling the usb-redir device requires usbredir-0.3 to be installed for
the usbredir protocol parser, usbredir-0.3 also contains a server for
redirecting usb traffic from an actual usb device. You can get the 0.3
release of usbredir here:
http://people.fedoraproject.org/~jwrdegoede/usbredir-0.3.tar.bz2
(getting a more formal site for it is a WIP)

Example usage:
1) Start usbredirserver for a usb device:
sudo usbredirserver 045e:0772
2) Start qemu with usb2 support + a chardev talking to usbredirserver +
   a usb-redir device using this chardev:
qemu ... \
  -readconfig docs/ich9-ehci-uhci.cfg \
  -chardev socket,id=usbredirchardev,host=localhost,port=4000 \
  -device usb-redir,chardev=usbredirchardev,id=usbredirdev
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

69354a83

qapi: add QMP dispatch functions · ab02ab2a