s390/kvm/gaccess.c

590 static int deref_table(struct kvm *kvm, unsigned long gpa, unsigned long *val)
592 	return kvm_read_guest(kvm, gpa, val, sizeof(*val));
599  * @gpa: points to where guest physical (absolute) address should be stored
607  * an addressing exception is indicated and @gpa will not be changed.
609  * Returns: - zero on success; @gpa contains the resulting absolute address
617 				     unsigned long *gpa, const union asce asce,
776 	*gpa = raddr.addr;
800 			       enum gacc_mode mode, gpa_t gpa)
810 	hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
863 				 enum gacc_mode mode, union asce asce, gpa_t gpa,
877 	hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(gpa));
914  * such that the concatenation of page fragments starting at each gpa make up
925  *	 When deriving the boundaries of a fragment from a gpa, all but the last
946 	unsigned long gpa;
956 			rc = guest_translate(vcpu, ga, &gpa, asce, mode, &prot);
960 			gpa = kvm_s390_real_to_abs(vcpu, ga);
961 			if (!kvm_is_gpa_in_memslot(vcpu->kvm, gpa)) {
968 		rc = vcpu_check_access_key(vcpu, access_key, mode, asce, gpa, ga,
973 			*gpas++ = gpa;
981 static int access_guest_page(struct kvm *kvm, enum gacc_mode mode, gpa_t gpa,
984 	const unsigned int offset = offset_in_page(gpa);
985 	const gfn_t gfn = gpa_to_gfn(gpa);
996 access_guest_page_with_key(struct kvm *kvm, enum gacc_mode mode, gpa_t gpa,
1005 	gfn = gpa >> PAGE_SHIFT;
1017 	hva += offset_in_page(gpa);
1029 int access_guest_abs_with_key(struct kvm *kvm, gpa_t gpa, void *data,
1032 	int offset = offset_in_page(gpa);
1038 		rc = access_guest_page_with_key(kvm, mode, gpa, data, fragment_len, access_key);
1044 		gpa += fragment_len;
1134 	unsigned long gpa;
1138 		gpa = kvm_s390_real_to_abs(vcpu, gra);
1139 		fragment_len = min(PAGE_SIZE - offset_in_page(gpa), len);
1140 		rc = access_guest_page(vcpu->kvm, mode, gpa, data, fragment_len);
1151  * @gpa: Absolute guest address of the location to be changed.
1154  * @old_addr: Pointer to old value. If the location at @gpa contains this value,
1156  *            *@old_addr contains the value at @gpa before the attempt to
1158  * @new: The value to place at @gpa.
1162  * Atomically exchange the value at @gpa by @new, if it contains *@old.
1172 int cmpxchg_guest_abs_with_key(struct kvm *kvm, gpa_t gpa, int len,
1176 	gfn_t gfn = gpa_to_gfn(gpa);
1182 	if (!IS_ALIGNED(gpa, len))
1196 	hva += offset_in_page(gpa);
1262  * @gpa: Guest physical address
1273 				     unsigned long *gpa, enum gacc_mode mode,
1283 	return guest_range_to_gpas(vcpu, gva, ar, gpa, 1, asce, mode,
1316  * @gpa: guest physical address
1321 int check_gpa_range(struct kvm *kvm, unsigned long gpa, unsigned long length,
1328 		fragment_len = min(PAGE_SIZE - offset_in_page(gpa), length);
1329 		rc = vm_check_access_key(kvm, access_key, mode, gpa);
1331 		gpa += fragment_len;