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Ian Campbell
0d819a81ab
This blocks the main thread indefinitely if there is no PCI backend present in xenstore. Even in the case where there are passthrough devices configured libxl creates the stubdom and waits for it to startup _before_ adding the backend. Since the stub domains main thread is blocked before it can write the "running" state to xenstore the toolstack eventually times out and kills everything. There is already a separate pcifront thread which waits for the backend to appear and calls init_pcifront at the appropriate time should a backend ever appear. Unfortunately I don't have any free test boxes with VT-d so I haven't been able to test the cases where PCI deivces are passed through but I obviously have tested that I can now start an HVM domain with stub qemu without PCI devices passed through which I couldn't do before so this is an improvement. This stuff is a bit like pushing the lump around the carpet :-/ Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Ian Jackson <ian.jackson.citrix.com> Committed-by: Ian Jackson <ian.jackson.citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Minimal OS ---------- This shows some of the stuff that any guest OS will have to set up. This includes: * installing a virtual exception table * handling virtual exceptions * handling asynchronous events * enabling/disabling async events * parsing start_info struct at start-of-day * registering virtual interrupt handlers (for timer interrupts) * a simple page and memory allocator * minimal libc support * minimal Copy-on-Write support * network, block, framebuffer support * transparent access to FileSystem exports (see tools/fs-back) - to build it just type make. - to build it with TCP/IP support, download LWIP 1.3 source code and type make LWIPDIR=/path/to/lwip/source - to build it with much better libc support, see the stubdom/ directory - to start it do the following in domain0 (assuming xend is running) # xm create domain_config This starts the kernel and prints out a bunch of stuff and then once every second the system time. If you have setup a disk in the config file (e.g. disk = [ 'file:/tmp/foo,hda,r' ] ), it will loop reading it. If that disk is writable (e.g. disk = [ 'file:/tmp/foo,hda,w' ] ), it will write data patterns and re-read them. If you have setup a network in the config file (e.g. vif = [''] ), it will print incoming packets. If you have setup a VFB in the config file (e.g. vfb = ['type=sdl'] ), it will show a mouse with which you can draw color squares. If you have compiled it with TCP/IP support, it will run a daytime server on TCP port 13.