[libvirt] [PATCH]write separate module for hostdev passthrough

[Chunyan Liu]

This patch sets include two patches:

1/2 is the implementation of the hostdev passthrough common library.
To meet two purposes: 
a. move qemu hostdev APIs to common library so that it could be used by all
hypervisor drivers.
b. maintain a global hostdev in-use state.

2/2 is the implementation of pci passthrough to libxl driver.
  
There should be more patches to change qemu driver and lxc driver codes to
switch to common library APIs, but I think it's better to have you review the
common library first. After common library APIs confirmed, then modify qemu/lxc
driver codes in a time. The implementation to libxl driver (2/2) is an example
of using common library.      
 
Please review, thanks!

Chunyan Liu (2):
  add pci passthrough common library
  add pci passthrough impl to libxl

 po/POTFILES.in               |    1 +
 src/Makefile.am              |    1 +
 src/libvirt.c                |    5 +
 src/libvirt_private.syms     |   15 +
 src/libxl/libxl_conf.c       |   44 ++
 src/libxl/libxl_driver.c     |   21 +-
 src/util/virhostdevmanager.c | 1218 ++++++++++++++++++++++++++++++++++++++++++
 src/util/virhostdevmanager.h |   91 ++++
 src/util/virpci.c            |   17 +-
 src/util/virpci.h            |    7 +-
 src/util/virusb.c            |   19 +-
 src/util/virusb.h            |    4 +-
 12 files changed, 1426 insertions(+), 17 deletions(-)
 create mode 100644 src/util/virhostdevmanager.c
 create mode 100644 src/util/virhostdevmanager.h