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 "hw/hw.h"
  25 #include "qapi/qmp/qerror.h"
  26 #include "qemu/error-report.h"
  27 #include "sysemu/block-backend.h"
  28 #include "sysemu/blockdev.h"
  29 #include "sysemu/sysemu.h"
  30 #include "net/net.h"
  31 #include "hw/boards.h"
  32 #include "hw/loader.h"
  33 #include "hw/virtio/virtio.h"
  34 #include "sysemu/kvm.h"
  35 #include "exec/address-spaces.h"
  36 #include "sysemu/qtest.h"
  37
  38 #include "hw/s390x/sclp.h"
  39 #include "hw/s390x/s390_flic.h"
  40 #include "hw/s390x/s390-virtio.h"
  41 #include "hw/s390x/storage-keys.h"
  42 #include "hw/s390x/ipl.h"
  43 #include "cpu.h"
  44
  45 //#define DEBUG_S390
  46
  47 #ifdef DEBUG_S390
  48 #define DPRINTF(fmt, ...) \
  49     do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
  50 #else
  51 #define DPRINTF(fmt, ...) \
  52     do { } while (0)
  53 #endif
  54
  55 #define MAX_BLK_DEVS                    10
  56 #define ZIPL_FILENAME                   "s390-zipl.rom"
  57 #define S390_MACHINE                    "s390-virtio"
  58 #define TYPE_S390_MACHINE               MACHINE_TYPE_NAME(S390_MACHINE)
  59
  60 #define S390_TOD_CLOCK_VALUE_MISSING    0x00
  61 #define S390_TOD_CLOCK_VALUE_PRESENT    0x01
  62
  63 static S390CPU **ipi_states;
  64
  65 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
  66 {
  67     if (cpu_addr >= smp_cpus) {
  68         return NULL;
  69     }
  70
  71     return ipi_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(const char *cpu_model)
  99 {
 100     int i;
 101
 102     if (cpu_model == NULL) {
 103         cpu_model = "host";
 104     }
 105
 106     ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus);
 107
 108     for (i = 0; i < smp_cpus; i++) {
 109         S390CPU *cpu;
 110         CPUState *cs;
 111
 112         cpu = cpu_s390x_init(cpu_model);
 113         cs = CPU(cpu);
 114
 115         ipi_states[i] = cpu;
 116         cs->halted = 1;
 117         cs->exception_index = EXCP_HLT;
 118     }
 119 }
 120
 121
 122 void s390_create_virtio_net(BusState *bus, const char *name)
 123 {
 124     int i;
 125
 126     for (i = 0; i < nb_nics; i++) {
 127         NICInfo *nd = &nd_table[i];
 128         DeviceState *dev;
 129
 130         if (!nd->model) {
 131             nd->model = g_strdup("virtio");
 132         }
 133
 134         qemu_check_nic_model(nd, "virtio");
 135
 136         dev = qdev_create(bus, name);
 137         qdev_set_nic_properties(dev, nd);
 138         qdev_init_nofail(dev);
 139     }
 140 }
 141
 142 void gtod_save(QEMUFile *f, void *opaque)
 143 {
 144     uint64_t tod_low;
 145     uint8_t tod_high;
 146     int r;
 147
 148     r = s390_get_clock(&tod_high, &tod_low);
 149     if (r) {
 150         fprintf(stderr, "WARNING: Unable to get guest clock for migration. "
 151                         "Error code %d. Guest clock will not be migrated "
 152                         "which could cause the guest to hang.\n", r);
 153         qemu_put_byte(f, S390_TOD_CLOCK_VALUE_MISSING);
 154         return;
 155     }
 156
 157     qemu_put_byte(f, S390_TOD_CLOCK_VALUE_PRESENT);
 158     qemu_put_byte(f, tod_high);
 159     qemu_put_be64(f, tod_low);
 160 }
 161
 162 int gtod_load(QEMUFile *f, void *opaque, int version_id)
 163 {
 164     uint64_t tod_low;
 165     uint8_t tod_high;
 166     int r;
 167
 168     if (qemu_get_byte(f) == S390_TOD_CLOCK_VALUE_MISSING) {
 169         fprintf(stderr, "WARNING: Guest clock was not migrated. This could "
 170                         "cause the guest to hang.\n");
 171         return 0;
 172     }
 173
 174     tod_high = qemu_get_byte(f);
 175     tod_low = qemu_get_be64(f);
 176
 177     r = s390_set_clock(&tod_high, &tod_low);
 178     if (r) {
 179         fprintf(stderr, "WARNING: Unable to set guest clock value. "
 180                         "s390_get_clock returned error %d. This could cause "
 181                         "the guest to hang.\n", r);
 182     }
 183
 184     return 0;
 185 }
 186
 187 void s390_nmi(NMIState *n, int cpu_index, Error **errp)
 188 {
 189     CPUState *cs = qemu_get_cpu(cpu_index);
 190
 191     if (s390_cpu_restart(S390_CPU(cs))) {
 192         error_setg(errp, QERR_UNSUPPORTED);
 193     }
 194 }
 195
 196 void s390_machine_reset(void)
 197 {
 198     S390CPU *ipl_cpu = S390_CPU(qemu_get_cpu(0));
 199
 200     qemu_devices_reset();
 201     s390_cmma_reset();
 202     s390_crypto_reset();
 203
 204     /* all cpus are stopped - configure and start the ipl cpu only */
 205     s390_ipl_prepare_cpu(ipl_cpu);
 206     s390_cpu_set_state(CPU_STATE_OPERATING, ipl_cpu);
 207 }