diff options
| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2015-11-25 09:59:49 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-21 09:43:40 +0200 |
| commit | 0615a326e066b580cf26d16a092ea54997dd6cbb (patch) | |
| tree | 75e1e34cb759447d1062383fa248fe2cddcdd251 /arch | |
| parent | 19c439b564b05939b83876a687bd48389d0aebb5 (diff) | |
KVM: s390: vsie: support shared IPTE-interlock facility
As we forward the whole SCA provided by guest 2, we can directly forward
SIIF if available.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/uapi/asm/kvm.h | 1 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/vsie.c | 2 |
3 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index c5e4537e96d9..1d2e820f763d 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -100,6 +100,7 @@ struct kvm_s390_vm_cpu_machine { #define KVM_S390_VM_CPU_FEAT_ESOP 0 #define KVM_S390_VM_CPU_FEAT_SIEF2 1 #define KVM_S390_VM_CPU_FEAT_64BSCAO 2 +#define KVM_S390_VM_CPU_FEAT_SIIF 3 struct kvm_s390_vm_cpu_feat { __u64 feat[16]; }; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index e0c5a57bf58b..d735612f9081 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -267,6 +267,8 @@ static void kvm_s390_cpu_feat_init(void) allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIEF2); if (sclp.has_64bscao) allow_cpu_feat(KVM_S390_VM_CPU_FEAT_64BSCAO); + if (sclp.has_siif) + allow_cpu_feat(KVM_S390_VM_CPU_FEAT_SIIF); } int kvm_arch_init(void *opaque) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index 44e66c329026..1615ed37f7da 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -315,6 +315,8 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) /* Run-time-Instrumentation */ if (test_kvm_facility(vcpu->kvm, 64)) scb_s->ecb3 |= scb_o->ecb3 & 0x01U; + if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_SIIF)) + scb_s->eca |= scb_o->eca & 0x00000001U; prepare_ibc(vcpu, vsie_page); rc = shadow_crycb(vcpu, vsie_page); |