On 05/22/09 22:11, Ed Swierk wrote:
Does it make sense to implement a generic mechanism for handling MSRs in userspace?
I see no other way to handle the xen pv msr writes.
I imagine a mechanism analogous to PIO, adding a KVM_EXIT_MSR code and a msr type in the kvm_run struct.
Sounds sensible to me. Probably must be off by default for backward compatibility, then enabled by ioctl. I think it would be best to enable it for specific msrs. We probably also want to have a way for userspace to figure whenever some specific msr is implemented in-kernel to handle the case of an msr emulation moving from userspace to kernelspace gracefully.
I'm happy to take a stab at implementing this if no one else is already working on it.
I is somewhere on my todo list, but I didn't looked at it (yet). Feel free to go ahead ;) cheers, Gerd -- 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
