qemu/hw/ppc
Greg Kurz 8251248394 spapr: reset DRCs after devices
A DRC with a pending unplug request releases its associated device at
machine reset time.

In the case of LMB, when all DRCs for a DIMM device have been reset,
the DIMM gets unplugged, causing guest memory to disappear. This may
be very confusing for anything still using this memory.

This is exactly what happens with vhost backends, and QEMU aborts
with:

qemu-system-ppc64: used ring relocated for ring 2
qemu-system-ppc64: qemu/hw/virtio/vhost.c:649: vhost_commit: Assertion
 `r >= 0' failed.

The issue is that each DRC registers a QEMU reset handler, and we
don't control the order in which these handlers are called (ie,
a LMB DRC will unplug a DIMM before the virtio device using the
memory on this DIMM could stop its vhost backend).

To avoid such situations, let's reset DRCs after all devices
have been reset.

Reported-by: Mallesh N. Koti <mallesh@linux.vnet.ibm.com>
Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2017-11-20 10:10:56 +11:00
..
e500-ccsr.h ppc: do not use ../ in include files 2013-03-01 13:57:33 +01:00
e500.c e500: ppce500_init_mpic() return device instead of IRQ array 2017-11-08 13:21:37 +11:00
e500.h target-ppc: Eliminate redundant and incorrect function booke206_page_size_to_tlb 2016-07-01 09:57:01 +10:00
e500plat.c ppc: mpc8544ds/e500plat: use generic cpu_model parsing 2017-10-17 10:34:00 +11:00
fdt.c Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
mac_newworld.c ppc: mac_newworld: use generic cpu_model parsing 2017-10-17 10:34:00 +11:00
mac_oldworld.c ppc: mac_oldworld: use generic cpu_model parsing 2017-10-17 10:34:00 +11:00
mac.h macio: use object link between MACIO_IDE and MAC_DBDMA object 2017-09-27 13:05:41 +10:00
Makefile.objs ppc4xx_i2c: Move to hw/i2c 2017-09-08 09:30:55 +10:00
mpc8544_guts.c shutdown: Add source information to SHUTDOWN and RESET 2017-05-23 13:28:17 +02:00
mpc8544ds.c ppc: mpc8544ds/e500plat: use generic cpu_model parsing 2017-10-17 10:34:00 +11:00
pnv_bmc.c ppc/pnv: generate an OEM SEL event on shutdown 2017-04-26 12:41:56 +10:00
pnv_core.c ppc: pnv: drop PnvChipClass::cpu_model field 2017-10-17 10:34:01 +11:00
pnv_lpc.c ppc/pnv: enable only one LPC bus 2017-04-26 12:41:55 +10:00
pnv_occ.c ppc/pnv: Add OCC model stub with interrupt support 2017-04-26 12:00:42 +10:00
pnv_psi.c xics: introduce macros for ICP/ICS link properties 2017-06-09 12:12:34 +10:00
pnv_xscom.c kvm: move cpu synchronization code 2017-01-19 22:07:46 +01:00
pnv.c ppc: pnv: consolidate type definitions and batch register them 2017-10-17 10:34:01 +11:00
ppc4xx_devs.c ppc: replace cpu_model with cpu_type on ref405ep,taihu boards 2017-10-17 10:34:00 +11:00
ppc4xx_pci.c pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
ppc405_boards.c hw: Use new memory_region_init_{ram, rom, rom_device}() functions 2017-07-14 17:59:42 +01:00
ppc405_uc.c ppc: replace cpu_model with cpu_type on ref405ep,taihu boards 2017-10-17 10:34:00 +11:00
ppc405.h ppc4xx: Export ECB and PLB emulation 2017-09-08 09:30:55 +10:00
ppc440_bamboo.c ppc: bamboo: use generic cpu_model parsing 2017-10-17 10:34:00 +11:00
ppc_booke.c ppc_booke: drop useless assignment 2017-05-07 09:57:51 +03:00
ppc.c ppc: spapr: replace ppc_cpu_parse_features() with cpu_parse_cpu_model() 2017-10-17 10:34:00 +11:00
ppce500_spin.c hw/ppc: QOM'ify ppce500_spin.c 2017-01-31 10:10:13 +11:00
prep_systemio.c prep: add PReP System I/O 2017-01-31 10:10:13 +11:00
prep.c ppc: 40p/prep: replace cpu_model with cpu_type 2017-10-17 10:34:00 +11:00
rs6000_mc.c prep: add IBM RS/6000 7020 (40p) memory controller 2017-01-31 10:10:13 +11:00
spapr_cpu_core.c spapr_cpu_core: rewrite machine type sanity check 2017-10-17 10:34:01 +11:00
spapr_drc.c spapr: reset DRCs after devices 2017-11-20 10:10:56 +11:00
spapr_events.c spapr_events: use QTAILQ_FOREACH_SAFE() in spapr_clear_pending_events() 2017-09-15 10:29:48 +10:00
spapr_hcall.c target/ppc: correct htab shift for hash on radix 2017-11-14 10:28:32 +11:00
spapr_iommu.c migration: pre_save return int 2017-09-27 11:35:59 +01:00
spapr_ovec.c spapr: replace debug printf with trace points 2017-02-22 11:28:28 +11:00
spapr_pci_vfio.c Use #include "..." for our own headers, <...> for others 2016-07-12 16:19:16 +02:00
spapr_pci.c spapr_pci: fail gracefully with non-pseries machine types 2017-10-17 10:34:01 +11:00
spapr_rng.c spapr_rng: Convert to DEFINE_PROP_LINK 2017-07-14 12:04:43 +02:00
spapr_rtas_ddw.c spapr_pci/spapr_pci_vfio: Support Dynamic DMA Windows (DDW) 2016-07-05 14:31:08 +10:00
spapr_rtas.c ppc: spapr: Make VCPU ID handling private to SPAPR 2017-09-08 09:30:55 +10:00
spapr_rtc.c hw/ppc/spapr_rtc: Mark the RTC device with user_creatable = false 2017-08-22 21:26:46 +10:00
spapr_vio.c vmstate: error hint for failed equal checks 2017-06-28 11:18:44 +02:00
spapr.c spapr: reset DRCs after devices 2017-11-20 10:10:56 +11:00
trace-events trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
virtex_ml507.c ppc: virtex-ml507: replace cpu_model with cpu_type 2017-10-17 10:34:00 +11:00