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 DEBUG_S390
  48
  49 #ifdef DEBUG_S390
  50 #define DPRINTF(fmt, ...) \
  51     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  52 #else
  53 #define DPRINTF(fmt, ...) \
  54     do { } while (0)
  55 #endif
  56
  57 #define MAX_BLK_DEVS                    10
  58
  59 #define S390_TOD_CLOCK_VALUE_MISSING    0x00
  60 #define S390_TOD_CLOCK_VALUE_PRESENT    0x01
  61
  62 static S390CPU **cpu_states;
  63
  64 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
  65 {
  66     if (cpu_addr >= max_cpus) {
  67         return NULL;
  68     }
  69
  70     /* Fast lookup via CPU ID */
  71     return cpu_states[cpu_addr];
  72 }
  73
  74 void s390_init_ipl_dev(const char *kernel_filename,
  75                        const char *kernel_cmdline,
  76                        const char *initrd_filename,
  77                        const char *firmware,
  78                        bool enforce_bios)
  79 {
  80     Object *new = object_new(TYPE_S390_IPL);
  81     DeviceState *dev = DEVICE(new);
  82
  83     if (kernel_filename) {
  84         qdev_prop_set_string(dev, "kernel", kernel_filename);
  85     }
  86     if (initrd_filename) {
  87         qdev_prop_set_string(dev, "initrd", initrd_filename);
  88     }
  89     qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
  90     qdev_prop_set_string(dev, "firmware", firmware);
  91     qdev_prop_set_bit(dev, "enforce_bios", enforce_bios);
  92     object_property_add_child(qdev_get_machine(), TYPE_S390_IPL,
  93                               new, NULL);
  94     object_unref(new);
  95     qdev_init_nofail(dev);
  96 }
  97
  98 void s390_init_cpus(MachineState *machine)
  99 {
 100     int i;
 101     gchar *name;
 102
 103     if (machine->cpu_model == NULL) {
 104         if (kvm_enabled()) {
 105             machine->cpu_model = "host";
 106         } else {
 107             machine->cpu_model = "qemu";
 108         }
 109     }
 110
 111     cpu_states = g_new0(S390CPU *, max_cpus);
 112
 113     for (i = 0; i < max_cpus; i++) {
 114         name = g_strdup_printf("cpu[%i]", i);
 115         object_property_add_link(OBJECT(machine), name, TYPE_S390_CPU,
 116                                  (Object **) &cpu_states[i],
 117                                  object_property_allow_set_link,
 118                                  OBJ_PROP_LINK_UNREF_ON_RELEASE,
 119                                  &error_abort);
 120         g_free(name);
 121     }
 122
 123     for (i = 0; i < smp_cpus; i++) {
 124         s390x_new_cpu(machine->cpu_model, i, &error_fatal);
 125     }
 126 }
 127
 128
 129 void s390_create_virtio_net(BusState *bus, const char *name)
 130 {
 131     int i;
 132
 133     for (i = 0; i < nb_nics; i++) {
 134         NICInfo *nd = &nd_table[i];
 135         DeviceState *dev;
 136
 137         if (!nd->model) {
 138             nd->model = g_strdup("virtio");
 139         }
 140
 141         qemu_check_nic_model(nd, "virtio");
 142
 143         dev = qdev_create(bus, name);
 144         qdev_set_nic_properties(dev, nd);
 145         qdev_init_nofail(dev);
 146     }
 147 }
 148
 149 void gtod_save(QEMUFile *f, void *opaque)
 150 {
 151     uint64_t tod_low;
 152     uint8_t tod_high;
 153     int r;
 154
 155     r = s390_get_clock(&tod_high, &tod_low);
 156     if (r) {
 157         fprintf(stderr, "WARNING: Unable to get guest clock for migration. "
 158                         "Error code %d. Guest clock will not be migrated "
 159                         "which could cause the guest to hang.\n", r);
 160         qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
 161         return;
 162     }
 163
 164     qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
 165     qemu_put_byte(f, tod_high);
 166     qemu_put_be64(f, tod_low);
 167 }
 168
 169 int gtod_load(QEMUFile *f, void *opaque, int version_id)
 170 {
 171     uint64_t tod_low;
 172     uint8_t tod_high;
 173     int r;
 174
 175     if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
 176         fprintf(stderr, "WARNING: Guest clock was not migrated. This could "
 177                         "cause the guest to hang.\n");
 178         return 0;
 179     }
 180
 181     tod_high = qemu_get_byte(f);
 182     tod_low = qemu_get_be64(f);
 183
 184     r = s390_set_clock(&tod_high, &tod_low);
 185     if (r) {
 186         fprintf(stderr, "WARNING: Unable to set guest clock value. "
 187                         "s390_get_clock returned error %d. This could cause "
 188                         "the guest to hang.\n", r);
 189     }
 190
 191     return 0;
 192 }
 193
 194 void s390_nmi(NMIState *n, int cpu_index, Error **errp)
 195 {
 196     CPUState *cs = qemu_get_cpu(cpu_index);
 197
 198     if (s390_cpu_restart(S390_CPU(cs))) {
 199         error_setg(errp, QERR_UNSUPPORTED);
 200     }
 201 }
 202
 203 void s390_machine_reset(void)
 204 {
 205     S390CPU *ipl_cpu = S390_CPU(qemu_get_cpu(0));
 206
 207     qemu_devices_reset();
 208     s390_cmma_reset();
 209     s390_crypto_reset();
 210
 211     /* all cpus are stopped - configure and start the ipl cpu only */
 212     s390_ipl_prepare_cpu(ipl_cpu);
 213     s390_cpu_set_state(CPU_STATE_OPERATING, ipl_cpu);
 214 }