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 "hw/hw.h"
  26 #include "qapi/qmp/qerror.h"
  27 #include "qemu/error-report.h"
  28 #include "sysemu/block-backend.h"
  29 #include "sysemu/blockdev.h"
  30 #include "sysemu/sysemu.h"
  31 #include "net/net.h"
  32 #include "hw/boards.h"
  33 #include "hw/loader.h"
  34 #include "hw/virtio/virtio.h"
  35 #include "sysemu/kvm.h"
  36 #include "exec/address-spaces.h"
  37 #include "sysemu/qtest.h"
  38
  39 #include "hw/s390x/sclp.h"
  40 #include "hw/s390x/s390_flic.h"
  41 #include "hw/s390x/s390-virtio.h"
  42 #include "hw/s390x/storage-keys.h"
  43 #include "hw/s390x/ipl.h"
  44 #include "cpu.h"
  45
  46 //#define DEBUG_S390
  47
  48 #ifdef DEBUG_S390
  49 #define DPRINTF(fmt, ...) \
  50     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  51 #else
  52 #define DPRINTF(fmt, ...) \
  53     do { } while (0)
  54 #endif
  55
  56 #define MAX_BLK_DEVS                    10
  57
  58 #define S390_TOD_CLOCK_VALUE_MISSING    0x00
  59 #define S390_TOD_CLOCK_VALUE_PRESENT    0x01
  60
  61 static S390CPU **cpu_states;
  62
  63 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
  64 {
  65     if (cpu_addr >= max_cpus) {
  66         return NULL;
  67     }
  68
  69     /* Fast lookup via CPU ID */
  70     return cpu_states[cpu_addr];
  71 }
  72
  73 void s390_init_ipl_dev(const char *kernel_filename,
  74                        const char *kernel_cmdline,
  75                        const char *initrd_filename,
  76                        const char *firmware,
  77                        bool enforce_bios)
  78 {
  79     Object *new = object_new(TYPE_S390_IPL);
  80     DeviceState *dev = DEVICE(new);
  81
  82     if (kernel_filename) {
  83         qdev_prop_set_string(dev, "kernel", kernel_filename);
  84     }
  85     if (initrd_filename) {
  86         qdev_prop_set_string(dev, "initrd", initrd_filename);
  87     }
  88     qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
  89     qdev_prop_set_string(dev, "firmware", firmware);
  90     qdev_prop_set_bit(dev, "enforce_bios", enforce_bios);
  91     object_property_add_child(qdev_get_machine(), TYPE_S390_IPL,
  92                               new, NULL);
  93     object_unref(new);
  94     qdev_init_nofail(dev);
  95 }
  96
  97 void s390_init_cpus(MachineState *machine)
  98 {
  99     int i;
 100     gchar *name;
 101
 102     if (machine->cpu_model == NULL) {
 103         machine->cpu_model = "host";
 104     }
 105
 106     cpu_states = g_new0(S390CPU *, max_cpus);
 107
 108     for (i = 0; i < max_cpus; i++) {
 109         name = g_strdup_printf("cpu[%i]", i);
 110         object_property_add_link(OBJECT(machine), name, TYPE_S390_CPU,
 111                                  (Object **) &cpu_states[i],
 112                                  object_property_allow_set_link,
 113                                  OBJ_PROP_LINK_UNREF_ON_RELEASE,
 114                                  &error_abort);
 115         g_free(name);
 116     }
 117
 118     for (i = 0; i < smp_cpus; i++) {
 119         s390x_new_cpu(machine->cpu_model, i, &error_fatal);
 120     }
 121 }
 122
 123
 124 void s390_create_virtio_net(BusState *bus, const char *name)
 125 {
 126     int i;
 127
 128     for (i = 0; i < nb_nics; i++) {
 129         NICInfo *nd = &nd_table[i];
 130         DeviceState *dev;
 131
 132         if (!nd->model) {
 133             nd->model = g_strdup("virtio");
 134         }
 135
 136         qemu_check_nic_model(nd, "virtio");
 137
 138         dev = qdev_create(bus, name);
 139         qdev_set_nic_properties(dev, nd);
 140         qdev_init_nofail(dev);
 141     }
 142 }
 143
 144 void gtod_save(QEMUFile *f, void *opaque)
 145 {
 146     uint64_t tod_low;
 147     uint8_t tod_high;
 148     int r;
 149
 150     r = s390_get_clock(&tod_high, &tod_low);
 151     if (r) {
 152         fprintf(stderr, "WARNING: Unable to get guest clock for migration. "
 153                         "Error code %d. Guest clock will not be migrated "
 154                         "which could cause the guest to hang.\n", r);
 155         qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
 156         return;
 157     }
 158
 159     qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
 160     qemu_put_byte(f, tod_high);
 161     qemu_put_be64(f, tod_low);
 162 }
 163
 164 int gtod_load(QEMUFile *f, void *opaque, int version_id)
 165 {
 166     uint64_t tod_low;
 167     uint8_t tod_high;
 168     int r;
 169
 170     if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
 171         fprintf(stderr, "WARNING: Guest clock was not migrated. This could "
 172                         "cause the guest to hang.\n");
 173         return 0;
 174     }
 175
 176     tod_high = qemu_get_byte(f);
 177     tod_low = qemu_get_be64(f);
 178
 179     r = s390_set_clock(&tod_high, &tod_low);
 180     if (r) {
 181         fprintf(stderr, "WARNING: Unable to set guest clock value. "
 182                         "s390_get_clock returned error %d. This could cause "
 183                         "the guest to hang.\n", r);
 184     }
 185
 186     return 0;
 187 }
 188
 189 void s390_nmi(NMIState *n, int cpu_index, Error **errp)
 190 {
 191     CPUState *cs = qemu_get_cpu(cpu_index);
 192
 193     if (s390_cpu_restart(S390_CPU(cs))) {
 194         error_setg(errp, QERR_UNSUPPORTED);
 195     }
 196 }
 197
 198 void s390_machine_reset(void)
 199 {
 200     S390CPU *ipl_cpu = S390_CPU(qemu_get_cpu(0));
 201
 202     qemu_devices_reset();
 203     s390_cmma_reset();
 204     s390_crypto_reset();
 205
 206     /* all cpus are stopped - configure and start the ipl cpu only */
 207     s390_ipl_prepare_cpu(ipl_cpu);
 208     s390_cpu_set_state(CPU_STATE_OPERATING, ipl_cpu);
 209 }