s390/kvm/vsie.c

653  * Pin the guest page given by gpa and set hpa to the pinned host address.
657  *          - -EINVAL if the gpa is not valid guest storage
659 static int pin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t *hpa)
663 	page = gfn_to_page(kvm, gpa_to_gfn(gpa));
666 	*hpa = (hpa_t)page_to_phys(page) + (gpa & ~PAGE_MASK);
671 static void unpin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t hpa)
675 	mark_page_dirty(kvm, gpa_to_gfn(gpa));
740 	gpa_t gpa;
743 	gpa = READ_ONCE(scb_o->scaol) & ~0xfUL;
745 		gpa |= (u64) READ_ONCE(scb_o->scaoh) << 32;
746 	if (gpa) {
747 		if (gpa < 2 * PAGE_SIZE)
749 		else if ((gpa & ~0x1fffUL) == kvm_s390_get_prefix(vcpu))
751 		else if ((gpa & PAGE_MASK) !=
752 			 ((gpa + sizeof(struct bsca_block) - 1) & PAGE_MASK))
755 			rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
761 		vsie_page->sca_gpa = gpa;
766 	gpa = READ_ONCE(scb_o->itdba) & ~0xffUL;
767 	if (gpa && (scb_s->ecb & ECB_TE)) {
768 		if (gpa < 2 * PAGE_SIZE) {
773 		rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
778 		vsie_page->itdba_gpa = gpa;
782 	gpa = READ_ONCE(scb_o->gvrd) & ~0x1ffUL;
783 	if (gpa && (scb_s->eca & ECA_VX) && !(scb_s->ecd & ECD_HOSTREGMGMT)) {
784 		if (gpa < 2 * PAGE_SIZE) {
792 		rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
797 		vsie_page->gvrd_gpa = gpa;
801 	gpa = READ_ONCE(scb_o->riccbd) & ~0x3fUL;
802 	if (gpa && (scb_s->ecb3 & ECB3_RI)) {
803 		if (gpa < 2 * PAGE_SIZE) {
808 		rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
814 		vsie_page->riccbd_gpa = gpa;
821 		gpa = READ_ONCE(scb_o->sdnxo) & ~0xfUL;
823 		if (!gpa || gpa < 2 * PAGE_SIZE) {
831 		if (gpa & ((1 << sdnxc) - 1)) {
838 		rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
843 		vsie_page->sdnx_gpa = gpa;
854 		      gpa_t gpa)
859 		unpin_guest_page(vcpu->kvm, gpa, hpa);
864  * Pin the scb at gpa provided by guest 2 at vsie_page->scb_o.
870 		   gpa_t gpa)
875 	rc = pin_guest_page(vcpu->kvm, gpa, &hpa);