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KVM: s390: vsie: support IBS interpretation

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We can easily enable ibs 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 16:56:23 +01:00 committed by Christian Borntraeger
parent 13ee3f678b
commit 7fd7f39daa
3 changed files with 5 additions and 0 deletions
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1
arch/s390/include/uapi/asm/kvm.h
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@ -105,6 +105,7 @@ struct kvm_s390_vm_cpu_machine {
#define KVM_S390_VM_CPU_FEAT_GSLS 5
#define KVM_S390_VM_CPU_FEAT_IB 6
#define KVM_S390_VM_CPU_FEAT_CEI 7
#define KVM_S390_VM_CPU_FEAT_IBS 8
struct kvm_s390_vm_cpu_feat {
__u64 feat[16];
};

2
arch/s390/kvm/kvm-s390.c
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@ -277,6 +277,8 @@ static void kvm_s390_cpu_feat_init(void)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IB);
if (sclp.has_cei)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_CEI);
if (sclp.has_ibs)
allow_cpu_feat(KVM_S390_VM_CPU_FEAT_IBS);
}
int kvm_arch_init(void *opaque)

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

@ -111,6 +111,8 @@ static int prepare_cpuflags(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
newflags |= cpuflags & CPUSTAT_P;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_GSLS))
newflags |= cpuflags & CPUSTAT_SM;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_IBS))
newflags |= cpuflags & CPUSTAT_IBS;
atomic_set(&scb_s->cpuflags, newflags);
return 0;