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                        bool enforce_bios)
  69 {
  70     Object *new = object_new(TYPE_S390_IPL);
  71     DeviceState *dev = DEVICE(new);
  72
  73     if (kernel_filename) {
  74         qdev_prop_set_string(dev, "kernel", kernel_filename);
  75     }
  76     if (initrd_filename) {
  77         qdev_prop_set_string(dev, "initrd", initrd_filename);
  78     }
  79     qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
  80     qdev_prop_set_string(dev, "firmware", firmware);
  81     qdev_prop_set_bit(dev, "enforce_bios", enforce_bios);
  82     object_property_add_child(qdev_get_machine(), TYPE_S390_IPL,
  83                               new, NULL);
  84     object_unref(new);
  85     qdev_init_nofail(dev);
  86 }
  87
  88 void s390_init_cpus(MachineState *machine)
  89 {
  90     int i;
  91     gchar *name;
  92
  93     if (machine->cpu_model == NULL) {
  94         if (kvm_enabled()) {
  95             machine->cpu_model = "host";
  96         } else {
  97             machine->cpu_model = "qemu";
  98         }
  99     }
 100
 101     cpu_states = g_new0(S390CPU *, max_cpus);
 102
 103     for (i = 0; i < max_cpus; i++) {
 104         name = g_strdup_printf("cpu[%i]", i);
 105         object_property_add_link(OBJECT(machine), name, TYPE_S390_CPU,
 106                                  (Object **) &cpu_states[i],
 107                                  object_property_allow_set_link,
 108                                  OBJ_PROP_LINK_UNREF_ON_RELEASE,
 109                                  &error_abort);
 110         g_free(name);
 111     }
 112
 113     for (i = 0; i < smp_cpus; i++) {
 114         s390x_new_cpu(machine->cpu_model, i, &error_fatal);
 115     }
 116 }
 117
 118
 119 void s390_create_virtio_net(BusState *bus, const char *name)
 120 {
 121     int i;
 122
 123     for (i = 0; i < nb_nics; i++) {
 124         NICInfo *nd = &nd_table[i];
 125         DeviceState *dev;
 126
 127         if (!nd->model) {
 128             nd->model = g_strdup("virtio");
 129         }
 130
 131         qemu_check_nic_model(nd, "virtio");
 132
 133         dev = qdev_create(bus, name);
 134         qdev_set_nic_properties(dev, nd);
 135         qdev_init_nofail(dev);
 136     }
 137 }
 138
 139 void gtod_save(QEMUFile *f, void *opaque)
 140 {
 141     uint64_t tod_low;
 142     uint8_t tod_high;
 143     int r;
 144
 145     r = s390_get_clock(&tod_high, &tod_low);
 146     if (r) {
 147         fprintf(stderr, "WARNING: Unable to get guest clock for migration. "
 148                         "Error code %d. Guest clock will not be migrated "
 149                         "which could cause the guest to hang.\n", r);
 150         qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
 151         return;
 152     }
 153
 154     qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
 155     qemu_put_byte(f, tod_high);
 156     qemu_put_be64(f, tod_low);
 157 }
 158
 159 int gtod_load(QEMUFile *f, void *opaque, int version_id)
 160 {
 161     uint64_t tod_low;
 162     uint8_t tod_high;
 163     int r;
 164
 165     if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
 166         fprintf(stderr, "WARNING: Guest clock was not migrated. This could "
 167                         "cause the guest to hang.\n");
 168         return 0;
 169     }
 170
 171     tod_high = qemu_get_byte(f);
 172     tod_low = qemu_get_be64(f);
 173
 174     r = s390_set_clock(&tod_high, &tod_low);
 175     if (r) {
 176         fprintf(stderr, "WARNING: Unable to set guest clock value. "
 177                         "s390_get_clock returned error %d. This could cause "
 178                         "the guest to hang.\n", r);
 179     }
 180
 181     return 0;
 182 }
 183
 184 void s390_nmi(NMIState *n, int cpu_index, Error **errp)
 185 {
 186     CPUState *cs = qemu_get_cpu(cpu_index);
 187
 188     if (s390_cpu_restart(S390_CPU(cs))) {
 189         error_setg(errp, QERR_UNSUPPORTED);
 190     }
 191 }
 192
 193 void s390_machine_reset(void)
 194 {
 195     S390CPU *ipl_cpu = S390_CPU(qemu_get_cpu(0));
 196
 197     s390_cmma_reset();
 198     qemu_devices_reset();
 199     s390_crypto_reset();
 200
 201     /* all cpus are stopped - configure and start the ipl cpu only */
 202     s390_ipl_prepare_cpu(ipl_cpu);
 203     s390_cpu_set_state(CPU_STATE_OPERATING, ipl_cpu);
 204 }