2 * QEMU S390 virtio target
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
29 #include "hw/virtio.h"
30 #include "hw/sysbus.h"
33 #include "hw/s390-virtio-bus.h"
38 #define dprintf(fmt, ...) \
39 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
41 #define dprintf(fmt, ...) \
45 #define KVM_S390_VIRTIO_NOTIFY 0
46 #define KVM_S390_VIRTIO_RESET 1
47 #define KVM_S390_VIRTIO_SET_STATUS 2
49 #define KERN_IMAGE_START 0x010000UL
50 #define KERN_PARM_AREA 0x010480UL
51 #define INITRD_START 0x800000UL
52 #define INITRD_PARM_START 0x010408UL
53 #define INITRD_PARM_SIZE 0x010410UL
54 #define PARMFILE_START 0x001000UL
56 #define ZIPL_START 0x009000UL
57 #define ZIPL_LOAD_ADDR 0x009000UL
58 #define ZIPL_FILENAME "s390-zipl.rom"
60 #define MAX_BLK_DEVS 10
62 static VirtIOS390Bus *s390_bus;
63 static CPUState **ipi_states;
65 void irq_info(Monitor *mon);
66 void pic_info(Monitor *mon);
68 void irq_info(Monitor *mon)
72 void pic_info(Monitor *mon)
76 CPUState *s390_cpu_addr2state(uint16_t cpu_addr)
78 if (cpu_addr >= smp_cpus) {
82 return ipi_states[cpu_addr];
85 int s390_virtio_hypercall(CPUState *env)
88 target_ulong mem = env->regs[2];
90 dprintf("KVM hypercall: %ld\n", env->regs[1]);
91 switch (env->regs[1]) {
92 case KVM_S390_VIRTIO_NOTIFY:
94 VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
97 virtio_queue_notify(dev->vdev, i);
105 case KVM_S390_VIRTIO_RESET:
107 VirtIOS390Device *dev;
109 dev = s390_virtio_bus_find_mem(s390_bus, mem);
110 virtio_reset(dev->vdev);
111 s390_virtio_device_sync(dev);
114 case KVM_S390_VIRTIO_SET_STATUS:
116 VirtIOS390Device *dev;
118 dev = s390_virtio_bus_find_mem(s390_bus, mem);
120 s390_virtio_device_update_status(dev);
135 /* PC hardware initialisation */
136 static void s390_init(ram_addr_t ram_size,
137 const char *boot_device,
138 const char *kernel_filename,
139 const char *kernel_cmdline,
140 const char *initrd_filename,
141 const char *cpu_model)
143 CPUState *env = NULL;
145 ram_addr_t kernel_size = 0;
146 ram_addr_t initrd_offset;
147 ram_addr_t initrd_size = 0;
150 /* XXX we only work on KVM for now */
152 if (!kvm_enabled()) {
153 fprintf(stderr, "The S390 target only works with KVM enabled\n");
158 s390_bus = s390_virtio_bus_init(&ram_size);
161 ram_addr = qemu_ram_alloc(NULL, "s390.ram", ram_size);
162 cpu_register_physical_memory(0, ram_size, ram_addr);
165 if (cpu_model == NULL) {
169 ipi_states = qemu_malloc(sizeof(CPUState *) * smp_cpus);
171 for (i = 0; i < smp_cpus; i++) {
174 tmp_env = cpu_init(cpu_model);
178 ipi_states[i] = tmp_env;
180 tmp_env->exception_index = EXCP_HLT;
184 env->exception_index = 0;
186 if (kernel_filename) {
187 kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0));
189 if (lduw_phys(KERN_IMAGE_START) != 0x0dd0) {
190 fprintf(stderr, "Specified image is not an s390 boot image\n");
194 env->psw.addr = KERN_IMAGE_START;
195 env->psw.mask = 0x0000000180000000ULL;
197 ram_addr_t bios_size = 0;
200 /* Load zipl bootloader */
201 if (bios_name == NULL) {
202 bios_name = ZIPL_FILENAME;
205 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
206 bios_size = load_image(bios_filename, qemu_get_ram_ptr(ZIPL_LOAD_ADDR));
208 if ((long)bios_size < 0) {
209 hw_error("could not load bootloader '%s'\n", bios_name);
212 if (bios_size > 4096) {
213 hw_error("stage1 bootloader is > 4k\n");
216 env->psw.addr = ZIPL_START;
217 env->psw.mask = 0x0000000180000000ULL;
220 if (initrd_filename) {
221 initrd_offset = INITRD_START;
222 while (kernel_size + 0x100000 > initrd_offset) {
223 initrd_offset += 0x100000;
225 initrd_size = load_image(initrd_filename, qemu_get_ram_ptr(initrd_offset));
227 stq_phys(INITRD_PARM_START, initrd_offset);
228 stq_phys(INITRD_PARM_SIZE, initrd_size);
231 if (kernel_cmdline) {
232 cpu_physical_memory_rw(KERN_PARM_AREA, (uint8_t *)kernel_cmdline,
233 strlen(kernel_cmdline), 1);
236 /* Create VirtIO network adapters */
237 for(i = 0; i < nb_nics; i++) {
238 NICInfo *nd = &nd_table[i];
242 nd->model = qemu_strdup("virtio");
245 if (strcmp(nd->model, "virtio")) {
246 fprintf(stderr, "S390 only supports VirtIO nics\n");
250 dev = qdev_create((BusState *)s390_bus, "virtio-net-s390");
251 qdev_set_nic_properties(dev, nd);
252 qdev_init_nofail(dev);
255 /* Create VirtIO disk drives */
256 for(i = 0; i < MAX_BLK_DEVS; i++) {
260 dinfo = drive_get(IF_IDE, 0, i);
265 dev = qdev_create((BusState *)s390_bus, "virtio-blk-s390");
266 qdev_prop_set_drive_nofail(dev, "drive", dinfo->bdrv);
267 qdev_init_nofail(dev);
271 static QEMUMachine s390_machine = {
272 .name = "s390-virtio",
274 .desc = "VirtIO based S390 machine",
284 static void s390_machine_init(void)
286 qemu_register_machine(&s390_machine);
289 machine_init(s390_machine_init);