[Qemu-devel] [PATCH 0/3] hw/pcie: better hotplug/hotunplug support

[Marcel Apfelbaum]

Hotplug triggers both 'present detect change' and
'attention button pressed'.

Hotunplug starts by triggering 'attention button pressed',
then waits for the OS to power off the device and only
then detaches it.

patch 1/3: trivial debug message fix
patch 2/3: enable 'power controller' to receive power events from guests
patch 3/3: the actual hotplug/hotunplug implementation.

Tested with Linux and Windows guests and with an e1000 with "PCIe" capability.
Notes:
    Windows requires devices to be pci express in order to enable
    hotplug functionality, so we need to think about converting
    virtio devices to pci express.
    Linux outputs a "Surprise Removal/Addition" info message because
    we trigger 2 events in the same time, however this warning
    can be disregarded or a kernel patch submitted for our scenario.

Marcel Apfelbaum (3):
  hw/pcie: corrected a debug message
  hw/pcie: implement power controller functionality
  hw/pcie: better hotplug/hotunplug support

 hw/pci/pcie.c              | 37 ++++++++++++++++++++++++++++++-------
 include/hw/pci/pcie_regs.h |  2 ++
 2 files changed, 32 insertions(+), 7 deletions(-)

-- 
1.8.3.1