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KVM: s390: instruction-execution-protection support 

The new Instruction Execution Protection needs to be enabled before
the guest can use it. Therefore we pass the IEP facility bit to the
guest and enable IEP interpretation.

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Janosch Frank 2016-08-04 09:57:36 +02:00 committed by Christian Borntraeger
parent a679c547d1
commit cd1836f583
3 changed files with 6 additions and 0 deletions
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2
arch/s390/kvm/kvm-s390.c
View File

@ -1938,6 +1938,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
vcpu->arch.sie_block->ecb2 |= 0x08;
if (test_kvm_facility(vcpu->kvm, 130))
vcpu->arch.sie_block->ecb2 |= 0x20;
vcpu->arch.sie_block->eca = 0x1002000U;
if (sclp.has_cei)
vcpu->arch.sie_block->eca |= 0x80000000U;

3
arch/s390/kvm/vsie.c
View File

@ -324,6 +324,9 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
/* Run-time-Instrumentation */
if (test_kvm_facility(vcpu->kvm, 64))
scb_s->ecb3 |= scb_o->ecb3 & 0x01U;
/* Instruction Execution Prevention */
if (test_kvm_facility(vcpu->kvm, 130))
scb_s->ecb2 |= scb_o->ecb2 & 0x20U;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_SIIF))
scb_s->eca |= scb_o->eca & 0x00000001U;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_IB))

1
arch/s390/tools/gen_facilities.c
View File

@ -80,6 +80,7 @@ static struct facility_def facility_defs[] = {
76, /* msa extension 3 */
77, /* msa extension 4 */
78, /* enhanced-DAT 2 */
130, /* instruction-execution-protection */
131, /* enhanced-SOP 2 and side-effect */
-1 /* END */
}