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authorSam Bobroff <sam.bobroff@au1.ibm.com>2016-07-20 13:41:36 +1000
committerPaolo Bonzini <pbonzini@redhat.com>2016-08-01 19:42:06 +0200
commit23528bb21ee2c9b27f3feddd77a2a3351a8df148 (patch)
treeeb17f1c15fa51cc04a606cd79658c806637eaddb /arch/powerpc
parent40a2df49858eb40ccfe979da69b74d8b203a869b (diff)
KVM: PPC: Introduce KVM_CAP_PPC_HTM
Introduce a new KVM capability, KVM_CAP_PPC_HTM, that can be queried to determine if a PowerPC KVM guest should use HTM (Hardware Transactional Memory). This will be used by QEMU to populate the pa-features bits in the guest's device tree. Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kvm/powerpc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 1ac036e45ed4..6ce40dd6fe51 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -588,6 +588,10 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = 1;
break;
#endif
+ case KVM_CAP_PPC_HTM:
+ r = cpu_has_feature(CPU_FTR_TM_COMP) &&
+ is_kvmppc_hv_enabled(kvm);
+ break;
default:
r = 0;
break;