This is a rebase of the old patchset from Roman for HyperV VMBus implementation.
How to use: -device vmbus-bridge Later on new paravirtualized devices can be implemented on top of it (Network/SCSI/etc.) VMBus is a collection of technologies. At its lowest layer, it's a message passing and signaling mechanism, allowing efficient passing of messages to and from guest VMs. A layer higher, it's a mechanism for defining channels of communication, where each channel is tagged with a type (which implies a protocol) and a instance ID. A layer higher than that, it's a bus driver, serving as the basis of device enumeration within a VM, where a channel can optionally be exposed as a paravirtual device. When a server-side (paravirtual back-end) component wishes to offer a channel to a guest VM, it does so by specifying a channel type, a mode, and an instance ID. VMBus then exposes this in the guest. More information about VMBus can be found in the file vmbuskernelmodeclientlibapi.h in Microsoft's WDK. v4: Decided to ditch the patch that envolves handling of EOM as there is still a discussion going on with it in the KVM mailing list. v3: Fixed an error asan v2: Rebased on top of latest patchset from Roman and Maciej Jon Doron (6): hyperv: expose API to determine if synic is enabled vmbus: add vmbus protocol definitions vmbus: vmbus implementation i386:pc: whitelist dynamic vmbus-bridge i386: Hyper-V VMBus ACPI DSDT entry vmbus: add infrastructure to save/load vmbus requests Makefile.objs | 1 + hw/hyperv/Kconfig | 5 + hw/hyperv/Makefile.objs | 1 + hw/hyperv/hyperv.c | 8 + hw/hyperv/trace-events | 18 + hw/hyperv/vmbus.c | 2778 ++++++++++++++++++++++++++++++ hw/i386/acpi-build.c | 43 + hw/i386/pc_piix.c | 2 + hw/i386/pc_q35.c | 2 + include/hw/hyperv/hyperv.h | 1 + include/hw/hyperv/vmbus-bridge.h | 35 + include/hw/hyperv/vmbus-proto.h | 222 +++ include/hw/hyperv/vmbus.h | 230 +++ 13 files changed, 3346 insertions(+) create mode 100644 hw/hyperv/trace-events create mode 100644 hw/hyperv/vmbus.c create mode 100644 include/hw/hyperv/vmbus-bridge.h create mode 100644 include/hw/hyperv/vmbus-proto.h create mode 100644 include/hw/hyperv/vmbus.h -- 2.24.1
