On Wed, Nov 25, 2015 at 06:20:20PM +0300, Andrey Smetanin wrote: > The SynIC message protocol mandates that the message slot is claimed > by atomically setting message type to something other than HVMSG_NONE. > If another message is to be delivered while the slot is still busy, > message pending flag is asserted to indicate to the guest that the > hypervisor wants to be notified when the slot is released. > > To make sure the protocol works regardless of where the message > sources are (kernel or userspace), clear the pending flag on SINT ACK > notification, and let the message sources compete for the slot again. > > Signed-off-by: Andrey Smetanin <asmetanin@xxxxxxxxxxxxx> > CC: Gleb Natapov <gleb@xxxxxxxxxx> > CC: Paolo Bonzini <pbonzini@xxxxxxxxxx> > CC: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx> > CC: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> > CC: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > CC: Roman Kagan <rkagan@xxxxxxxxxxxxx> > CC: Denis V. Lunev <den@xxxxxxxxxx> > CC: qemu-devel@xxxxxxxxxx Reviewed-by: Roman Kagan <rkagan@xxxxxxxxxxxxx> Roman. -- 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
