hw/s390x/s390-virtio.c

   1 /*
   2  * QEMU S390 virtio target
   3  *
   4  * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
   5  * Copyright IBM Corp 2012
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * Contributions after 2012-10-29 are licensed under the terms of the
  18  * GNU GPL, version 2 or (at your option) any later version.
  19  *
  20  * You should have received a copy of the GNU (Lesser) General Public
  21  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "qemu/osdep.h"
  25 #include "qapi/error.h"
  26 #include "hw/hw.h"
  27 #include "qapi/qmp/qerror.h"
  28 #include "qemu/error-report.h"
  29 #include "sysemu/block-backend.h"
  30 #include "sysemu/blockdev.h"
  31 #include "sysemu/sysemu.h"
  32 #include "net/net.h"
  33 #include "hw/boards.h"
  34 #include "hw/loader.h"
  35 #include "hw/virtio/virtio.h"
  36 #include "sysemu/kvm.h"
  37 #include "exec/address-spaces.h"
  38 #include "sysemu/qtest.h"
  39
  40 #include "hw/s390x/sclp.h"
  41 #include "hw/s390x/s390_flic.h"
  42 #include "hw/s390x/s390-virtio.h"
  43 #include "hw/s390x/storage-keys.h"
  44 #include "hw/s390x/ipl.h"
  45 #include "cpu.h"
  46
  47 #define MAX_BLK_DEVS                    10
  48
  49 #define S390_TOD_CLOCK_VALUE_MISSING    0x00
  50 #define S390_TOD_CLOCK_VALUE_PRESENT    0x01
  51
  52 static S390CPU **cpu_states;
  53
  54 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
  55 {
  56     if (cpu_addr >= max_cpus) {
  57         return NULL;
  58     }
  59
  60     /* Fast lookup via CPU ID */
  61     return cpu_states[cpu_addr];
  62 }
  63
  64 void s390_init_ipl_dev(const char *kernel_filename,
  65                        const char *kernel_cmdline,
  66                        const char *initrd_filename,
  67                        const char *firmware,
  68                        const char *netboot_fw,
  69                        bool enforce_bios)
  70 {
  71     Object *new = object_new(TYPE_S390_IPL);
  72     DeviceState *dev = DEVICE(new);
  73
  74     if (kernel_filename) {
  75         qdev_prop_set_string(dev, "kernel", kernel_filename);
  76     }
  77     if (initrd_filename) {
  78         qdev_prop_set_string(dev, "initrd", initrd_filename);
  79     }
  80     qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
  81     qdev_prop_set_string(dev, "firmware", firmware);
  82     qdev_prop_set_string(dev, "netboot_fw", netboot_fw);
  83     qdev_prop_set_bit(dev, "enforce_bios", enforce_bios);
  84     object_property_add_child(qdev_get_machine(), TYPE_S390_IPL,
  85                               new, NULL);
  86     object_unref(new);
  87     qdev_init_nofail(dev);
  88 }
  89
  90 void s390_init_cpus(MachineState *machine)
  91 {
  92     int i;
  93     gchar *name;
  94
  95     if (machine->cpu_model == NULL) {
  96         if (kvm_enabled()) {
  97             machine->cpu_model = "host";
  98         } else {
  99             machine->cpu_model = "qemu";
 100         }
 101     }
 102
 103     cpu_states = g_new0(S390CPU *, max_cpus);
 104
 105     for (i = 0; i < max_cpus; i++) {
 106         name = g_strdup_printf("cpu[%i]", i);
 107         object_property_add_link(OBJECT(machine), name, TYPE_S390_CPU,
 108                                  (Object **) &cpu_states[i],
 109                                  object_property_allow_set_link,
 110                                  OBJ_PROP_LINK_UNREF_ON_RELEASE,
 111                                  &error_abort);
 112         g_free(name);
 113     }
 114
 115     for (i = 0; i < smp_cpus; i++) {
 116         s390x_new_cpu(machine->cpu_model, i, &error_fatal);
 117     }
 118 }
 119
 120
 121 void s390_create_virtio_net(BusState *bus, const char *name)
 122 {
 123     int i;
 124
 125     for (i = 0; i < nb_nics; i++) {
 126         NICInfo *nd = &nd_table[i];
 127         DeviceState *dev;
 128
 129         if (!nd->model) {
 130             nd->model = g_strdup("virtio");
 131         }
 132
 133         qemu_check_nic_model(nd, "virtio");
 134
 135         dev = qdev_create(bus, name);
 136         qdev_set_nic_properties(dev, nd);
 137         qdev_init_nofail(dev);
 138     }
 139 }
 140
 141 void gtod_save(QEMUFile *f, void *opaque)
 142 {
 143     uint64_t tod_low;
 144     uint8_t tod_high;
 145     int r;
 146
 147     r = s390_get_clock(&tod_high, &tod_low);
 148     if (r) {
 149         fprintf(stderr, "WARNING: Unable to get guest clock for migration. "
 150                         "Error code %d. Guest clock will not be migrated "
 151                         "which could cause the guest to hang.\n", r);
 152         qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
 153         return;
 154     }
 155
 156     qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
 157     qemu_put_byte(f, tod_high);
 158     qemu_put_be64(f, tod_low);
 159 }
 160
 161 int gtod_load(QEMUFile *f, void *opaque, int version_id)
 162 {
 163     uint64_t tod_low;
 164     uint8_t tod_high;
 165     int r;
 166
 167     if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
 168         fprintf(stderr, "WARNING: Guest clock was not migrated. This could "
 169                         "cause the guest to hang.\n");
 170         return 0;
 171     }
 172
 173     tod_high = qemu_get_byte(f);
 174     tod_low = qemu_get_be64(f);
 175
 176     r = s390_set_clock(&tod_high, &tod_low);
 177     if (r) {
 178         fprintf(stderr, "WARNING: Unable to set guest clock value. "
 179                         "s390_get_clock returned error %d. This could cause "
 180                         "the guest to hang.\n", r);
 181     }
 182
 183     return 0;
 184 }
 185
 186 void s390_nmi(NMIState *n, int cpu_index, Error **errp)
 187 {
 188     CPUState *cs = qemu_get_cpu(cpu_index);
 189
 190     if (s390_cpu_restart(S390_CPU(cs))) {
 191         error_setg(errp, QERR_UNSUPPORTED);
 192     }
 193 }
 194
 195 void s390_machine_reset(void)
 196 {
 197     S390CPU *ipl_cpu = S390_CPU(qemu_get_cpu(0));
 198
 199     s390_cmma_reset();
 200     qemu_devices_reset();
 201     s390_crypto_reset();
 202
 203     /* all cpus are stopped - configure and start the ipl cpu only */
 204     s390_ipl_prepare_cpu(ipl_cpu);
 205     s390_cpu_set_state(CPU_STATE_OPERATING, ipl_cpu);
 206 }