From: Michael Mueller <mimu@linux.vnet.ibm.com>
Date: Fri, 23 Jun 2017 12:46:21 +0000 (+0200)
Subject: KVM: s390: activate GISA for emulated interrupts
X-Git-Tag: v4.16-rc1~10^2~12^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f180bfdae024b34e71e89dcc82b037dd97f74c3a;p=thirdparty%2Flinux.git

KVM: s390: activate GISA for emulated interrupts

If the AIV facility is available, a GISA will be used to manage emulated
adapter interrupts.

Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index f2dc86884ea42..488ecc7ea2a18 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -2842,7 +2842,13 @@ void kvm_s390_gisa_clear(struct kvm *kvm)
 
 void kvm_s390_gisa_init(struct kvm *kvm)
 {
-	/* not implemented yet */
+	if (!css_general_characteristics.aiv)
+		kvm->arch.gisa = NULL;
+	else {
+		kvm->arch.gisa = &kvm->arch.sie_page2->gisa;
+		VM_EVENT(kvm, 3, "gisa 0x%pK initialized", kvm->arch.gisa);
+		kvm_s390_gisa_clear(kvm);
+	}
 }
 
 void kvm_s390_gisa_destroy(struct kvm *kvm)