Re: [PATCH v2] Driver for Inter-VM shared memory device for KVM supporting interrupts.

[Cam Macdonell <cam@cs.ualberta.ca>]

Christian Borntraeger wrote:
> Am Thursday 07 May 2009 18:26:07 schrieb Cam Macdonell:
>> Driver for inter-VM shared memory device that now supports interrupts
>> between two guests.  The driver defines a counting semaphore and wait_event
>> queue for different synchronization needs of users.  Initializing the
>> semaphore count, sending interrupts and waiting are implemented via ioctl
>> calls. 
> ...
>> +#include <linux/pci.h>
> 
> Sorry for the late question, but I missed your first version. Is there a way to change that code to use virtio instead of PCI? That would allow us to use this driver on s390 and maybe other virtio transports.
> 
> Christian
> 

Forgive my s390 ignorance, but is there a device interface in s390 that 
can export memory and support interrupts?  I'm not opposed to virtio, 
but I like the simplicity of the PCI approach as well as having the 
memory that is shared external to any particular VM.  The current 
approach is using a shared memory object on the host as the shared 
memory the VMs share.

Cam

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