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KVM: s390: log runtime instrumentation enablement
We handle runtime instrumentation enablement either lazy or via sync_regs on migration. Make sure to add a debug log entry for that per CPU on the first occurrence. Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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4495c08e84
commit
4d5f2c04c8
2 changed files with 9 additions and 6 deletions
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@ -2719,6 +2719,9 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
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static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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struct runtime_instr_cb *riccb;
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riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
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vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
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vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
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if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
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@ -2747,11 +2750,10 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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* we should enable RI here instead of doing the lazy enablement.
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*/
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if ((kvm_run->kvm_dirty_regs & KVM_SYNC_RICCB) &&
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test_kvm_facility(vcpu->kvm, 64)) {
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struct runtime_instr_cb *riccb =
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(struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
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if (riccb->valid)
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test_kvm_facility(vcpu->kvm, 64) &&
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riccb->valid &&
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!(vcpu->arch.sie_block->ecb3 & 0x01)) {
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VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
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vcpu->arch.sie_block->ecb3 |= 0x01;
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}
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save_access_regs(vcpu->arch.host_acrs);
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@ -37,6 +37,7 @@
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static int handle_ri(struct kvm_vcpu *vcpu)
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{
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if (test_kvm_facility(vcpu->kvm, 64)) {
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VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (lazy)");
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vcpu->arch.sie_block->ecb3 |= 0x01;
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kvm_s390_retry_instr(vcpu);
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return 0;
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