Cam Macdonell wrote:
This driver allows the guest VM to access shared memory between other guest that is a POSIX shared memory object on the host. The driver can also send interrupts by writing to the DoorBell register. With interrupts, the ioctl must specify the ID of the VM to receive the interrupt or '255' for broadcast to all active VMs. The 'arg' parameter is the destination VM and 'cmd' is the interrupt code. The value written to the register is a bit messy. 32-bits are written to the register, the upper 16 are the destination VM, and the lower 16 are the interrupt 'code' that the destination guest will receive. Implemented codes (see the interrupt handler) either call up on the device's semaphore or wake up on the wait_event queue. These codes' uses are at the discretion of the driver so they could be customized. For ioctls that read values from the device (such as for getting the global ID of the guest) the arg parameter is unused. Cam
I think you should just use Michael's uio_pci driver. I don't think we have a need for a new kernel interface.
Regards, Anthony Liguori -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
