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ppc patch queue for 2017-03-29 

Two more bugfixes of sufficient severity to warrant going into 2.9.
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Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.9-20170329' into staging

ppc patch queue for 2017-03-29

Two more bugfixes of sufficient severity to warrant going into 2.9.

# gpg: Signature made Wed 29 Mar 2017 04:33:19 BST
# gpg:                using RSA key 0x6C38CACA20D9B392
# 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:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.9-20170329:
  spapr: fix memory hot-unplugging
  spapr: fix buffer-overflow

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-03-30 14:53:03 +01:00
parent e68dd68496 fe6824d126
commit a67ec6ee2d
3 changed files with 20 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
hw/ppc/spapr.c
View File

@ -1524,16 +1524,16 @@ static void htab_save_first_pass(QEMUFile *f, sPAPRMachineState *spapr,
/* Consume invalid HPTEs */
while ((index < htabslots)
&& !HPTE_VALID(HPTE(spapr->htab, index))) {
index++;
CLEAN_HPTE(HPTE(spapr->htab, index));
index++;
}
/* Consume valid HPTEs */
chunkstart = index;
while ((index < htabslots) && (index - chunkstart < USHRT_MAX)
&& HPTE_VALID(HPTE(spapr->htab, index))) {
index++;
CLEAN_HPTE(HPTE(spapr->htab, index));
index++;
}
if (index > chunkstart) {

20
hw/ppc/spapr_drc.c
View File

@ -135,6 +135,17 @@ static uint32_t set_allocation_state(sPAPRDRConnector *drc,
if (!drc->dev) {
return RTAS_OUT_NO_SUCH_INDICATOR;
}
if (drc->awaiting_release && drc->awaiting_allocation) {
/* kernel is acknowledging a previous hotplug event
* while we are already removing it.
* it's safe to ignore awaiting_allocation here since we know the
* situation is predicated on the guest either already having done
* so (boot-time hotplug), or never being able to acquire in the
* first place (hotplug followed by immediate unplug).
*/
drc->awaiting_allocation_skippable = true;
return RTAS_OUT_NO_SUCH_INDICATOR;
}
}
if (drc->type != SPAPR_DR_CONNECTOR_TYPE_PCI) {
@ -436,9 +447,11 @@ static void detach(sPAPRDRConnector *drc, DeviceState *d,
}
if (drc->awaiting_allocation) {
drc->awaiting_release = true;
trace_spapr_drc_awaiting_allocation(get_index(drc));
return;
if (!drc->awaiting_allocation_skippable) {
drc->awaiting_release = true;
trace_spapr_drc_awaiting_allocation(get_index(drc));
return;
}
}
drc->indicator_state = SPAPR_DR_INDICATOR_STATE_INACTIVE;
@ -448,6 +461,7 @@ static void detach(sPAPRDRConnector *drc, DeviceState *d,
}
drc->awaiting_release = false;
drc->awaiting_allocation_skippable = false;
g_free(drc->fdt);
drc->fdt = NULL;
drc->fdt_start_offset = 0;

1
include/hw/ppc/spapr_drc.h
View File

@ -154,6 +154,7 @@ typedef struct sPAPRDRConnector {
bool awaiting_release;
bool signalled;
bool awaiting_allocation;
bool awaiting_allocation_skippable;
/* device pointer, via link property */
DeviceState *dev;