libxenlight: implement stubdom support

this patch implements stubdom support for libxenlight:

- it adds two functions to find the stubdom domid of a domain and to
figure out if a certain domain is actually a stubdom;

- it moves all the device init functions from xl.c to libxl.c because
they are needed to setup the devices of stubdoms;

- it fixes some bugs in the pci setup that prevented pci passthrough
from working correctly with stubdoms.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/libxl/libxl_utils.h b/tools/libxl/libxl_utils.h
index 77787922f7..e4e487cb23 100644
--- a/tools/libxl/libxl_utils.h
+++ b/tools/libxl/libxl_utils.h
@@ -29,6 +29,8 @@ int libxl_is_uuid(char *s);
 xen_uuid_t *libxl_string_to_uuid(struct libxl_ctx *ctx, char *s);
 char *libxl_uuid_to_string(struct libxl_ctx *ctx, xen_uuid_t *uuid);
 int libxl_param_to_domid(struct libxl_ctx *ctx, char *p, uint32_t *domid);
+int libxl_get_stubdom_id(struct libxl_ctx *ctx, int guest_domid);
+int libxl_is_stubdom(struct libxl_ctx *ctx, int domid);
 
 #endif