goldfish: add QEMU pipe driver

A QEMU pipe is a very fast communication channel between the
guest system and the emulator. Usage from the guest is simply
something like;

  // connect to special device
  fd = open("/dev/qemu_pipe", O_RDWR);

  // tell which service we want to talk to (must be zero-terminated)
  write(fd, "pipeName", strlen("pipeName")+1);

  // do read()/write() through fd now
  ...

  // close channel
  close(fd);

Signed-off-by: David 'Digit' Turner <[email protected]>
[Added support for parameter buffers for speed]
igned-off-by: Xin, Xiaohui <[email protected]>
Signed-off-by: Jiang, Yunhong <[email protected]>
Signed-off-by: Nakajima, Jun <[email protected]>
[Ported to 3.6]
Signed-off-by: Tom Keel <[email protected]>
[Ported to 3.7, moved to platform/goldfish]
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

0 files changed, 0 insertions, 0 deletions