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Revision 6cbf4c8c


Added by Cam Macdonell almost 13 years ago

RESEND: Inter-VM shared memory PCI device

resend for bug fix related to removal of irqfd

Support an inter-vm shared memory device that maps a shared-memory object as a
PCI device in the guest. This patch also supports interrupts between guest by
communicating over a unix domain socket. This patch applies to the qemu-kvm

-device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]

Interrupts are supported between multiple VMs by using a shared memory server
by using a chardev socket.

-device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]
-chardev socket,path=<path>,id=<id>

The shared memory server, sample programs and init scripts are in a git repo here:


Signed-off-by: Cam Macdonell <>
Signed-off-by: Anthony Liguori <>


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