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ppc patch queue for 2016-04-26 (last minute qemu-2.6 fix)

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This just has one, last-minute, fix for a serious regression of memory
 hotplug.
 
 Patch author's comment:
     Really sorry for the way last-minute fix, but without this memory
     hotplug is totally broken :( Hoping to get this in for Wednesday's
     RC4, which I think will be the final before release.
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.6-20160426' into staging

ppc patch queue for 2016-04-26 (last minute qemu-2.6 fix)

This just has one, last-minute, fix for a serious regression of memory
hotplug.

Patch author's comment:
    Really sorry for the way last-minute fix, but without this memory
    hotplug is totally broken :( Hoping to get this in for Wednesday's
    RC4, which I think will be the final before release.

# gpg: Signature made Tue 26 Apr 2016 03:52:20 BST using RSA key ID 20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.6-20160426:
  spapr_drc: fix aborts during DRC-count based hotplug

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2016-04-28 10:25:26 +01:00
commit 61861eff69
2 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
hw/ppc/spapr_drc.c
View File

@ -364,7 +364,17 @@ static void attach(sPAPRDRConnector *drc, DeviceState *d, void *fdt,
drc->fdt = fdt;
drc->fdt_start_offset = fdt_start_offset;
drc->configured = coldplug;
drc->signalled = coldplug;
/* 'logical' DR resources such as memory/cpus are in some cases treated
* as a pool of resources from which the guest is free to choose from
* based on only a count. for resources that can be assigned in this
* fashion, we must assume the resource is signalled immediately
* since a single hotplug request might make an arbitrary number of
* such attached resources available to the guest, as opposed to
* 'physical' DR resources such as PCI where each device/resource is
* signalled individually.
*/
drc->signalled = (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI)
? true : coldplug;
object_property_add_link(OBJECT(drc), "device",
object_get_typename(OBJECT(drc->dev)),

7
hw/ppc/spapr_events.c
View File

@ -442,6 +442,9 @@ static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
switch (drc_type) {
case SPAPR_DR_CONNECTOR_TYPE_PCI:
hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_PCI;
if (hp->hotplug_action == RTAS_LOG_V6_HP_ACTION_ADD) {
spapr_hotplug_set_signalled(drc);
}
break;
case SPAPR_DR_CONNECTOR_TYPE_LMB:
hp->hotplug_type = RTAS_LOG_V6_HP_TYPE_MEMORY;
@ -462,10 +465,6 @@ static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
rtas_event_log_queue(RTAS_LOG_TYPE_HOTPLUG, new_hp, true);
if (hp->hotplug_action == RTAS_LOG_V6_HP_ACTION_ADD) {
spapr_hotplug_set_signalled(drc);
}
qemu_irq_pulse(xics_get_qirq(spapr->icp, spapr->check_exception_irq));
}