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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>
This commit is contained in:
Sam Bobroff 2016-07-20 13:41:36 +10:00 committed by Paolo Bonzini
parent 40a2df4985
commit 23528bb21e
2 changed files with 5 additions and 0 deletions
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4
arch/powerpc/kvm/powerpc.c
View File

@ -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;

1
include/uapi/linux/kvm.h
View File

@ -869,6 +869,7 @@ struct kvm_ppc_smmu_info {
#define KVM_CAP_X2APIC_API 129
#define KVM_CAP_S390_USER_INSTR0 130
#define KVM_CAP_MSI_DEVID 131
#define KVM_CAP_PPC_HTM 132
#ifdef KVM_CAP_IRQ_ROUTING