KVM: s390: protvirt: Add program exception injection (ea5c68c3) · Commits · 戴 / test

Only two program exceptions can be injected for a protected guest: specification and operand. For both, a code needs to be specified in the interrupt injection control of the state description, as the guest prefix page is not accessible to KVM for such guests. Signed-off-by:

Janosch Frank <frankja@linux.ibm.com> Reviewed-by:

Cornelia Huck <cohuck@redhat.com> Reviewed-by:

Thomas Huth <thuth@redhat.com> Reviewed-by:

David Hildenbrand <david@redhat.com> [borntraeger@de.ibm.com: patch merging, splitting, fixing] Signed-off-by:

Christian Borntraeger <borntraeger@de.ibm.com>

arch/s390/kvm/interrupt.c

+19 −0

Original line number	Diff line number	Diff line
		@@ -836,6 +836,21 @@ static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
		return rc ? -EFAULT : 0;
		}

		static int __deliver_prog_pv(struct kvm_vcpu *vcpu, u16 code)
		{
		switch (code) {
		case PGM_SPECIFICATION:
		vcpu->arch.sie_block->iictl = IICTL_CODE_SPECIFICATION;
		break;
		case PGM_OPERAND:
		vcpu->arch.sie_block->iictl = IICTL_CODE_OPERAND;
		break;
		default:
		return -EINVAL;
		}
		return 0;
		}

		static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
		{
		struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
		@@ -856,6 +871,10 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
		trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
		pgm_info.code, 0);

		/* PER is handled by the ultravisor */
		if (kvm_s390_pv_cpu_is_protected(vcpu))
		return __deliver_prog_pv(vcpu, pgm_info.code & ~PGM_PER);

		switch (pgm_info.code & ~PGM_PER) {
		case PGM_AFX_TRANSLATION:
		case PGM_ASX_TRANSLATION:

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