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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
..
9pfs 9pfs: fix v9fs_mark_fids_unreclaim() return value 2017-11-06 18:05:35 +01:00
acpi * TCG 8-byte atomic accesses bugfix (Andrew) 2017-10-19 15:38:07 +01:00
adc STM32F2xx: Add the ADC device 2016-10-04 13:28:07 +01:00
alpha alpha: use generic cpu_model parsing 2017-10-27 16:03:53 +02:00
arm hw: add .min_cpus and .default_cpus fields to machine_class 2017-11-13 13:55:27 +00:00
audio pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
block xen: dont try setting max grants multiple times 2017-10-26 14:23:08 -07:00
bt bt: stop the sdp memory allocation craziness 2017-08-01 17:27:33 +02:00
char Enable 8-byte wide MMIO for 16550 serial devices 2017-11-06 17:15:14 +01:00
core * TCG 8-byte atomic accesses bugfix (Andrew) 2017-10-19 15:38:07 +01:00
cpu cpu: don't allow negative core id 2017-08-02 18:30:13 -03:00
cris cris: use generic cpu_model parsing 2017-10-27 16:03:54 +02:00
display vga: bugfixes for 2.11 2017-11-13 14:33:29 +00:00
dma sun4m_iommu: remove legacy sparc_iommu_memory_rw() function 2017-10-31 17:25:37 +00:00
gpio hw/gpio/omap_gpio.c: Don't use old_mmio 2017-09-21 16:34:27 +01:00
i2c pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
i386 NUMA: Enable adding NUMA node implicitly 2017-11-16 17:46:53 +02:00
ide ide: avoid referencing NULL dev in rotational rate setting 2017-10-31 18:00:03 -04:00
input ps2: fix scancodes sent for Ctrl+Pause key combination 2017-10-23 10:50:02 +02:00
intc Miscellaneous bugfixes 2017-11-16 14:42:54 +00:00
ipack pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
ipmi qom: enforce readonly nature of link's check callback 2017-07-14 12:04:42 +02:00
isa pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
lm32 lm32: lm32_boards: use generic cpu_model parsing 2017-10-27 16:03:54 +02:00
m68k m68k: mcf5208: use generic cpu_model parsing 2017-10-27 16:03:54 +02:00
mem qmp: introduce query-memory-size-summary command 2017-09-14 15:52:10 +01:00
microblaze hw: Use new memory_region_init_{ram, rom, rom_device}() functions 2017-07-14 17:59:42 +01:00
mips mips: r4k: replace cpu_model with cpu_type 2017-10-27 16:04:28 +02:00
misc build-sys: restrict vmcoreinfo to fw_cfg+dma capable targets 2017-11-16 17:46:53 +02:00
moxie moxie: use generic cpu_model parsing 2017-10-27 16:03:54 +02:00
net Add new PCI ID for i82559a 2017-11-13 15:48:54 +08:00
nios2 nios2: replace cpu_nios2_init() with cpu_generic_init() 2017-09-01 11:54:24 -03:00
nvram fw_cfg: add write callback 2017-10-15 05:54:40 +03:00
openrisc openrisc: use generic cpu_model parsing 2017-10-27 16:03:54 +02:00
pci pci: Initialize pci_dev->name before use 2017-11-16 17:46:53 +02:00
pci-bridge hw/pcie-pci-bridge: restrict to X86 and ARM 2017-11-16 17:46:53 +02:00
pci-host hw/pci-host: Fix x86 Host Bridges 64bit PCI hole 2017-11-16 17:46:53 +02:00
pcmcia
ppc spapr: reset DRCs after devices 2017-11-20 10:10:56 +11:00
s390x s390x/pci: let pci devices start in configured mode 2017-11-08 12:00:08 +01:00
scsi vhost-user-scsi: add missing virtqueue_size param 2017-11-14 14:31:33 +01:00
sd pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
sh4 sh4: shix: use generic cpu_model parsing 2017-10-27 16:03:54 +02:00
smbios stubs: move smbios stubs to hw/smbios 2017-01-16 17:52:35 +01:00
sparc sparc32_dma: introduce new SPARC32_DMA type container object 2017-10-31 17:25:36 +00:00
sparc64 sparc: sun4u/sun4v/niagara: use generic cpu_model parsing 2017-10-27 16:04:27 +02:00
ssi msf2: Remove dead code reported by Coverity 2017-10-31 11:50:51 +00:00
timer migration: pre_save return int 2017-09-27 11:35:59 +01:00
tpm tpm_tis: Return 0 for every register in case of failure mode 2017-11-15 06:47:35 -05:00
tricore tricore: use generic cpu_model parsing 2017-10-27 16:04:27 +02:00
unicore32 unicore32: use generic cpu_model parsing 2017-10-27 16:04:27 +02:00
usb usb-ccid: remove needless migration state code 2017-10-23 10:05:28 +02:00
vfio s390x: improve error handling for SSCH and RSCH 2017-10-20 13:32:10 +02:00
virtio fix: unrealize virtio device if we fail to hotplug it 2017-11-16 17:46:53 +02:00
watchdog pci: Add INTERFACE_CONVENTIONAL_PCI_DEVICE to Conventional PCI devices 2017-10-15 05:54:43 +03:00
xen pci-assign: Remove 2017-11-05 14:52:10 +01:00
xenpv xenfb: remove xen_init_display "temporary" hack 2017-07-07 11:10:03 -07:00
xtensa xtensa: lx60/lx200/ml605/kc705: use generic cpu_model parsing 2017-10-27 16:04:27 +02:00
Makefile.objs 9pfs: fix dependencies 2017-08-30 18:23:25 +02:00