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contrib: add ivshmem client and server

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When using ivshmem devices, notifications between guests can be sent as
interrupts using a ivshmem-server (typical use described in documentation).
The client is provided as a debug tool.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Signed-off-by: David Marchand <david.marchand@6wind.com>
[fix a valgrind warning, option and server_close() segvs, extra server
headers includes, getopt() return type, out-of-tree build, use qemu
event_notifier instead of eventfd, fix x86/osx warnings - Marc-André]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
David Marchand 2014-09-08 11:17:48 +02:00 • committed by Marc-André Lureau
parent 12f0b68c82
commit a75eb03b9f
12 changed files with 1759 additions and 3 deletions
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10
qemu-doc.texi
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@ -1266,9 +1266,13 @@ is qemu.git/contrib/ivshmem-server. An example syntax when using the shared
memory server is:
@example
qemu-system-i386 -device ivshmem,size=<size in format accepted by -m>[,chardev=<id>]
[,msi=on][,ioeventfd=on][,vectors=n][,role=peer|master]
qemu-system-i386 -chardev socket,path=<path>,id=<id>
# First start the ivshmem server once and for all
ivshmem-server -p <pidfile> -S <path> -m <shm name> -l <shm size> -n <vectors n>
# Then start your qemu instances with matching arguments
qemu-system-i386 -device ivshmem,size=<shm size>,vectors=<vectors n>,chardev=<id>
[,msi=on][,ioeventfd=on][,role=peer|master]
-chardev socket,path=<path>,id=<id>
@end example
When using the server, the guest will be assigned a VM ID (>=0) that allows guests