qemu

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s390-skeys-kvm.c (2283B)

      1 /*
      2  * s390 storage key device
      3  *
      4  * Copyright 2015 IBM Corp.
      5  * Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com>
      6  *
      7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
      8  * your option) any later version. See the COPYING file in the top-level
      9  * directory.
     10  */
     11 
     12 #include "qemu/osdep.h"
     13 #include "hw/s390x/storage-keys.h"
     14 #include "sysemu/kvm.h"
     15 #include "qemu/error-report.h"
     16 #include "qemu/module.h"
     17 
     18 static bool kvm_s390_skeys_are_enabled(S390SKeysState *ss)
     19 {
     20     S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
     21     uint8_t single_key;
     22     int r;
     23 
     24     r = skeyclass->get_skeys(ss, 0, 1, &single_key);
     25     if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) {
     26         error_report("S390_GET_KEYS error %d", r);
     27     }
     28     return (r == 0);
     29 }
     30 
     31 static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
     32                               uint64_t count, uint8_t *keys)
     33 {
     34     struct kvm_s390_skeys args = {
     35         .start_gfn = start_gfn,
     36         .count = count,
     37         .skeydata_addr = (__u64)keys
     38     };
     39 
     40     return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args);
     41 }
     42 
     43 static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
     44                               uint64_t count, uint8_t *keys)
     45 {
     46     struct kvm_s390_skeys args = {
     47         .start_gfn = start_gfn,
     48         .count = count,
     49         .skeydata_addr = (__u64)keys
     50     };
     51 
     52     return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
     53 }
     54 
     55 static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
     56 {
     57     S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
     58     DeviceClass *dc = DEVICE_CLASS(oc);
     59 
     60     skeyclass->skeys_are_enabled = kvm_s390_skeys_are_enabled;
     61     skeyclass->get_skeys = kvm_s390_skeys_get;
     62     skeyclass->set_skeys = kvm_s390_skeys_set;
     63 
     64     /* Reason: Internal device (only one skeys device for the whole memory) */
     65     dc->user_creatable = false;
     66 }
     67 
     68 static const TypeInfo kvm_s390_skeys_info = {
     69     .name          = TYPE_KVM_S390_SKEYS,
     70     .parent        = TYPE_S390_SKEYS,
     71     .instance_size = sizeof(S390SKeysState),
     72     .class_init    = kvm_s390_skeys_class_init,
     73     .class_size    = sizeof(S390SKeysClass),
     74 };
     75 
     76 static void kvm_s390_skeys_register_types(void)
     77 {
     78     type_register_static(&kvm_s390_skeys_info);
     79 }
     80 
     81 type_init(kvm_s390_skeys_register_types)