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| author | Harsh Prateek Bora <harshpb@linux.ibm.com> | 2024-11-25 16:43:34 +1000 |
|---|---|---|
| committer | Nicholas Piggin <npiggin@gmail.com> | 2024-11-27 02:49:36 +1000 |
| commit | e8185fdc63e1db1efba695aae568fae8a075a815 (patch) | |
| tree | 49723687607cc9fefea4ae9cbfaa3bb8b25b05a5 /hw/ppc | |
| parent | 5e39814916c91485073da38f457a43bf317c1f08 (diff) | |
| download | qemu-e8185fdc63e1db1efba695aae568fae8a075a815.zip qemu-e8185fdc63e1db1efba695aae568fae8a075a815.tar.gz qemu-e8185fdc63e1db1efba695aae568fae8a075a815.tar.bz2 | |
ppc/spapr: fix drc index mismatch for partially enabled vcpus
In case when vcpus are explicitly enabled/disabled in a non-consecutive
order within a libvirt xml, it results in a drc index mismatch during
vcpu hotplug later because the existing logic uses vcpu id to derive the
corresponding drc index which is not correct. Use env->core_index to
derive a vcpu's drc index as appropriate to fix this issue.
For ex, for the given libvirt xml config:
<vcpus>
<vcpu id='0' enabled='yes' hotpluggable='no'/>
<vcpu id='1' enabled='yes' hotpluggable='yes'/>
<vcpu id='2' enabled='no' hotpluggable='yes'/>
<vcpu id='3' enabled='yes' hotpluggable='yes'/>
<vcpu id='4' enabled='no' hotpluggable='yes'/>
<vcpu id='5' enabled='yes' hotpluggable='yes'/>
<vcpu id='6' enabled='no' hotpluggable='yes'/>
<vcpu id='7' enabled='no' hotpluggable='yes'/>
</vcpus>
We see below error on guest console with "virsh setvcpus <domain> 5" :
pseries-hotplug-cpu: CPU with drc index 10000002 already exists
This patch fixes the issue by using correct drc index for explicitly
enabled vcpus during init.
Reported-by: Anushree Mathur <anushree.mathur@linux.vnet.ibm.com>
Tested-by: Anushree Mathur <anushree.mathur@linux.vnet.ibm.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'hw/ppc')
| -rw-r--r-- | hw/ppc/spapr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 5c02037..0d4efaa 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -701,7 +701,7 @@ static void spapr_dt_cpu(CPUState *cs, void *fdt, int offset, uint32_t radix_AP_encodings[PPC_PAGE_SIZES_MAX_SZ]; int i; - drc = spapr_drc_by_id(TYPE_SPAPR_DRC_CPU, index); + drc = spapr_drc_by_id(TYPE_SPAPR_DRC_CPU, env->core_index); if (drc) { drc_index = spapr_drc_index(drc); _FDT((fdt_setprop_cell(fdt, offset, "ibm,my-drc-index", drc_index))); |