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Commit 7fd7f39d authored by David Hildenbrand's avatar David Hildenbrand Committed by Christian Borntraeger
Browse files

KVM: s390: vsie: support IBS interpretation 



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

Acked-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 13ee3f67

arch/s390/include/uapi/asm/kvm.h

+1 −0
Original line number Diff line number Diff line
@@ -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];

};

arch/s390/kvm/kvm-s390.c

+2 −0
Original line number Diff line number Diff line
@@ -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)

arch/s390/kvm/vsie.c

+2 −0
Original line number Diff line number Diff line
@@ -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;