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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2015-11-24 16:56:23 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2016-06-21 09:43:43 +0200
commit7fd7f39daa3da822122124730437c4f37e4d82de (patch)
treeede479d5258ac059dcc49aeb28a6617042bf7b3d /arch/s390
parent13ee3f678b1117d7511a2c5e10549f7c37f4cadf (diff)
downloadblackbird-op-linux-7fd7f39daa3da822122124730437c4f37e4d82de.tar.gz
blackbird-op-linux-7fd7f39daa3da822122124730437c4f37e4d82de.zip
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 <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/s390')
-rw-r--r--arch/s390/include/uapi/asm/kvm.h1
-rw-r--r--arch/s390/kvm/kvm-s390.c2
-rw-r--r--arch/s390/kvm/vsie.c2
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 7630dd70ed57..c128567d1cd3 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 1c1188ba1042..8ba7a98a50cf 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 f3a4a0bad4a7..3ececbbd6bb0 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;
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