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ad334d89a6
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Greg Kurz ad334d89a6 spapr: Handle pending hot plug/unplug requests at CAS 
If a hot plug or unplug request is pending at CAS, we currently trigger
a CAS reboot, which severely increases the guest boot time. This is
because SLOF doesn't handle hot plug events and we had no way to fix
the FDT that gets presented to the guest.

We can do better thanks to recent changes in QEMU and SLOF:

- we now return a full FDT to SLOF during CAS

- SLOF was fixed to correctly detect any device that was either added or
  removed since boot time and to update its internal DT accordingly.

The right solution is to process all pending hot plug/unplug requests
during CAS: convert hot plugged devices to cold plugged devices and
remove the hot unplugged ones, which is exactly what spapr_drc_reset()
does. Also clear all hot plug events that are currently queued since
they're no longer relevant.

Note that SLOF cannot currently populate hot plugged PCI bridges or PHBs
at CAS. Until this limitation is lifted, SLOF will reset the machine when
this scenario occurs : this will allow the FDT to be fully processed when
SLOF is started again (ie. the same effect as the CAS reboot that would
occur anyway without this patch).

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <158257222352.4102917.8984214333937947307.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2020-03-17 09:41:14 +11:00
..
e500-ccsr.h ppc: do not use ../ in include files 2013-03-01 13:57:33 +01:00
e500.c Merge tag 'patchew/20200219160953.13771-1-imammedo@redhat.com' of https://github.com/patchew-project/qemu into HEAD 2020-02-25 09:19:00 +01:00
e500.h platform-bus-device: use device plug callback instead of machine_done notifier 2018-05-10 18:10:56 +01:00
e500plat.c ppc/e500: use memdev for RAM 2020-02-19 16:50:00 +00:00
fdt.c target/ppc: Split page size information into a separate allocation 2018-04-27 18:05:22 +10:00
fw_cfg.c hw/ppc: Implement fw_cfg_arch_key_name() 2019-05-23 14:10:31 +02:00
Kconfig ppc/pnv: Fix PCI_EXPRESS dependency 2020-02-21 09:15:03 +11:00
mac_newworld.c ppc/mac_newworld: use memdev for RAM 2020-02-19 16:50:00 +00:00
mac_oldworld.c hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
mac.h ide: Include hw/ide/internal a bit less outside hw/ide/ 2019-08-16 13:31:52 +02:00
Makefile.objs spapr: Add NVDIMM device support 2020-02-21 09:15:04 +11:00
mpc8544_guts.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
mpc8544ds.c ppc/e500: use memdev for RAM 2020-02-19 16:50:00 +00:00
pnv_bmc.c ppc/pnv: Add a "pnor" const link property to the BMC internal simulator 2020-01-08 11:01:59 +11:00
pnv_core.c ppc/pnv: change the PowerNV machine devices to be non user creatable 2020-02-02 14:07:57 +11:00
pnv_homer.c ppc/pnv: change the PowerNV machine devices to be non user creatable 2020-02-02 14:07:57 +11:00
pnv_lpc.c Avoid address_space_rw() with a constant is_write argument 2020-02-20 14:47:08 +01:00
pnv_occ.c ppc/pnv: change the PowerNV machine devices to be non user creatable 2020-02-02 14:07:57 +11:00
pnv_pnor.c ppc/pnv: improve error logging when a PNOR update fails 2020-02-02 14:07:57 +11:00
pnv_psi.c add device_legacy_reset function to prepare for reset api change 2020-01-30 16:02:03 +00:00
pnv_xscom.c ppc/pnv: Introduce PnvChipClass::xscom_pcba() method 2019-12-17 10:59:11 +11:00
pnv.c Merge tag 'patchew/20200219160953.13771-1-imammedo@redhat.com' of https://github.com/patchew-project/qemu into HEAD 2020-02-25 09:19:00 +01:00
ppc4xx_devs.c ppc/{ppc440_bamboo, sam460ex}: use memdev for RAM 2020-02-19 16:50:00 +00:00
ppc4xx_pci.c Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
ppc405_boards.c ppc/ppc405_boards: use memdev for RAM 2020-02-19 16:50:00 +00:00
ppc405_uc.c Include hw/boards.h a bit less 2019-08-16 13:31:53 +02:00
ppc405.h ppc4xx: Export ECB and PLB emulation 2017-09-08 09:30:55 +10:00
ppc440_bamboo.c ppc/{ppc440_bamboo, sam460ex}: use memdev for RAM 2020-02-19 16:50:00 +00:00
ppc440_pcix.c Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
ppc440_uc.c Let cpu_[physical]_memory() calls pass a boolean 'is_write' argument 2020-02-20 14:47:08 +01:00
ppc440.h ppc440_uc: Basic emulation of PPC440 DMA controller 2018-07-03 09:56:52 +10:00
ppc_booke.c sysemu: Split sysemu/runstate.h off sysemu/sysemu.h 2019-08-16 13:37:36 +02:00
ppc.c hw/ppc/prep: Remove the deprecated "prep" machine and the OpenHackware BIOS 2020-02-02 14:07:57 +11:00
ppce500_spin.c Clean up inclusion of sysemu/sysemu.h 2019-08-16 13:31:53 +02:00
prep_systemio.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
prep.c hw/ppc/prep: Remove the deprecated "prep" machine and the OpenHackware BIOS 2020-02-02 14:07:57 +11:00
rs6000_mc.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
sam460ex.c ppc/{ppc440_bamboo, sam460ex}: use memdev for RAM 2020-02-19 16:50:00 +00:00
spapr_caps.c ppc: spapr: Handle "ibm,nmi-register" and "ibm,nmi-interlock" RTAS calls 2020-02-03 11:33:11 +11:00
spapr_cpu_core.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
spapr_drc.c spapr: Fix handling of unplugged devices during CAS and migration 2020-02-21 09:15:04 +11:00
spapr_events.c spapr: Handle pending hot plug/unplug requests at CAS 2020-03-17 09:41:14 +11:00
spapr_hcall.c spapr: Handle pending hot plug/unplug requests at CAS 2020-03-17 09:41:14 +11:00
spapr_iommu.c vmstate: replace DeviceState with VMStateIf 2020-01-06 18:41:32 +04:00
spapr_irq.c spapr, pnv, xive: Add a "xive-fabric" link to the XIVE router 2020-01-08 11:01:59 +11:00
spapr_nvdimm.c spapr: Add Hcalls to support PAPR NVDIMM device 2020-02-21 09:15:04 +11:00
spapr_ovec.c spapr: Simplify ovec diff 2019-12-17 10:39:48 +11:00
spapr_pci_nvlink2.c error: Clean up unusual names of Error * variables 2019-12-18 08:36:15 +01:00
spapr_pci_vfio.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
spapr_pci.c add device_legacy_reset function to prepare for reset api change 2020-01-30 16:02:03 +00:00
spapr_rng.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
spapr_rtas_ddw.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
spapr_rtas.c spapr/rtas: Print message from "ibm,os-term" 2020-02-21 09:15:03 +11:00
spapr_rtc.c Include migration/vmstate.h less 2019-08-16 13:31:52 +02:00
spapr_tpm_proxy.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
spapr_vio.c spapr: Implement get_dt_compatible() callback 2020-02-02 14:07:57 +11:00
spapr.c hw: Make MachineClass::is_default a boolean type 2020-02-28 14:57:19 -05:00
trace-events spapr: Remove unhelpful tracepoints from spapr_irq_free_xics() 2019-10-04 19:08:22 +10:00
virtex_ml507.c Merge tag 'patchew/20200219160953.13771-1-imammedo@redhat.com' of https://github.com/patchew-project/qemu into HEAD 2020-02-25 09:19:00 +01:00