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s390x/kvm: don't enable CMMA when hugetlbfs will be used

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On hugetlbfs CMMA will not be useful as every ESSA instruction will trap.
So don't offer CMMA to guests with a hugepages backing.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Dominik Dingel
2015-11-11 17:21:39 +01:00
committed by Cornelia Huck
parent ae23a33591
commit 4c292a0097
1 changed files with 3 additions and 1 deletions
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target-s390x/kvm.c
+3 -1
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@@ -258,7 +258,9 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);
cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ);
kvm_s390_enable_cmma(s);
if (!mem_path) {
kvm_s390_enable_cmma(s);
}
if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
|| !kvm_check_extension(s, KVM_CAP_S390_COW)) {