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KVM: s390: vsie: support conditional-external-interception 

We can easily enable cei for guest 2, so he can use it for guest 3.

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>
This commit is contained in:
David Hildenbrand 2015-11-24 16:54:37 +01:00 committed by Christian Borntraeger
parent 5630a8e82b
commit 13ee3f678b
3 changed files with 5 additions and 0 deletions
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1
arch/s390/include/uapi/asm/kvm.h
View File

@ -104,6 +104,7 @@ struct kvm_s390_vm_cpu_machine {
#define KVM_S390_VM_CPU_FEAT_GPERE 4
#define KVM_S390_VM_CPU_FEAT_GSLS 5
#define KVM_S390_VM_CPU_FEAT_IB 6
#define KVM_S390_VM_CPU_FEAT_CEI 7
struct kvm_s390_vm_cpu_feat {
__u64 feat[16];
};

2
arch/s390/kvm/kvm-s390.c
View File

@ -275,6 +275,8 @@ static void kvm_s390_cpu_feat_init(void)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_GSLS);
if (sclp.has_ib)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
if (sclp.has_cei)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
}
int kvm_arch_init(void *opaque)

2
arch/s390/kvm/vsie.c
View File

@ -324,6 +324,8 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
scb_s->eca |= scb_o->eca & 0x00000001U;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_IB))
scb_s->eca |= scb_o->eca & 0x40000000U;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_CEI))
scb_s->eca |= scb_o->eca & 0x80000000U;
prepare_ibc(vcpu, vsie_page);
rc = shadow_crycb(vcpu, vsie_page);