Michael Roth f40eb921da spapr_drc: enable immediate detach for unsignalled devices ... Currently spapr doesn't support "aborting" hotplug of PCI devices by allowing device_del to immediately remove the device if we haven't signalled the presence of the device to the guest. In the past this wasn't an issue, since we always immediately signalled device attach and simply relied on full guest-aware add->remove path for device removal. However, as of 788d259, we now defer signalling for PCI functions until function 0 is attached, so now we need to deal with these "abort" operations for cases where a user hotplugs a non-0 function, then opts to remove it prior hotplugging function 0. Currently they'd have to reboot before the unplug completed. PCIe multifunction hotplug does not have this requirement however, so from a management implementation perspective it would be good to address this within the same release as 788d259. We accomplish this by simply adding a 'signalled' flag to track whether a device hotplug event has been sent to the guest. If it hasn't, we allow immediate removal under the assumption that the guest will not be using the device. Devices present at boot/reset time are also assumed to be 'signalled'. For CPU/memory/etc, signalling will still happen immediately as part of device_add, so only PCI functions should be affected. Cc: bharata@linux.vnet.ibm.com Cc: david@gibson.dropbear.id.au Cc: sbhat@linux.vnet.ibm.com Cc: qemu-ppc@nongnu.org Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> [dwg: This fixes a regression where an incorrect hot-add of a non-zero function can no longer be backed out until function 0 is added] Signed-off-by: David Gibson <david@gibson.dropbear.id.au>		2016-04-05 10:47:03 +10:00
..
mac_dbdma.h	include/qemu/iov.h: Don't include qemu-common.h	2016-03-22 22:20:16 +01:00
openpic.h	intc/openpic_kvm: Fix QOM and build issues	2013-07-01 01:11:15 +02:00
ppc.h	PPC: mac99: Move NVRAM to page boundary when necessary	2014-09-08 12:50:47 +02:00
ppc4xx.h	hw: move headers to include/	2013-04-08 18:13:10 +02:00
ppc_e500.h	intc/openpic: Build openpic only once	2013-07-09 21:33:02 +02:00
spapr.h	ppc: Rework POWER7 & POWER8 exception model	2016-04-05 10:38:24 +10:00
spapr_drc.h	spapr_drc: enable immediate detach for unsignalled devices	2016-04-05 10:47:03 +10:00
spapr_vio.h	spapr vio: fix to incomplete QOMify	2016-01-11 15:29:05 +11:00
xics.h	xics: report errors with the QEMU Error API	2016-02-28 16:19:02 +11:00