From 7fd7f39daa3da822122124730437c4f37e4d82de Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Tue, 24 Nov 2015 16:56:23 +0100 Subject: KVM: s390: vsie: support IBS interpretation We can easily enable ibs for guest 2, so he can use it for guest 3. Acked-by: Christian Borntraeger Signed-off-by: David Hildenbrand Signed-off-by: Christian Borntraeger --- arch/s390/include/uapi/asm/kvm.h | 1 + arch/s390/kvm/kvm-s390.c | 2 ++ arch/s390/kvm/vsie.c | 2 ++ 3 files changed, 5 insertions(+) (limited to 'arch/s390') diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 7630dd70ed570..c128567d1cd3c 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -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]; }; diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 1c1188ba10425..8ba7a98a50cfb 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -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) diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c index f3a4a0bad4a7e..3ececbbd6bb08 100644 --- a/arch/s390/kvm/vsie.c +++ b/arch/s390/kvm/vsie.c @@ -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; -- cgit v1.2.3