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"
32 #include "exec-memory.h"
34 #include "hw/s390-virtio-bus.h"
39 #define dprintf(fmt, ...) \
40 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
42 #define dprintf(fmt, ...) \
46 #define KVM_S390_VIRTIO_NOTIFY 0
47 #define KVM_S390_VIRTIO_RESET 1
48 #define KVM_S390_VIRTIO_SET_STATUS 2
50 #define KERN_IMAGE_START 0x010000UL
51 #define KERN_PARM_AREA 0x010480UL
52 #define INITRD_START 0x800000UL
53 #define INITRD_PARM_START 0x010408UL
54 #define INITRD_PARM_SIZE 0x010410UL
55 #define PARMFILE_START 0x001000UL
57 #define ZIPL_START 0x009000UL
58 #define ZIPL_LOAD_ADDR 0x009000UL
59 #define ZIPL_FILENAME "s390-zipl.rom"
61 #define MAX_BLK_DEVS 10
63 static VirtIOS390Bus *s390_bus;
64 static CPUState **ipi_states;
66 CPUState *s390_cpu_addr2state(uint16_t cpu_addr)
68 if (cpu_addr >= smp_cpus) {
72 return ipi_states[cpu_addr];
75 int s390_virtio_hypercall(CPUState *env, uint64_t mem, uint64_t hypercall)
79 dprintf("KVM hypercall: %ld\n", hypercall);
81 case KVM_S390_VIRTIO_NOTIFY:
83 VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus,
86 virtio_queue_notify(dev->vdev, i);
94 case KVM_S390_VIRTIO_RESET:
96 VirtIOS390Device *dev;
98 dev = s390_virtio_bus_find_mem(s390_bus, mem);
99 virtio_reset(dev->vdev);
100 s390_virtio_device_sync(dev);
103 case KVM_S390_VIRTIO_SET_STATUS:
105 VirtIOS390Device *dev;
107 dev = s390_virtio_bus_find_mem(s390_bus, mem);
109 s390_virtio_device_update_status(dev);
123 /* PC hardware initialisation */
124 static void s390_init(ram_addr_t my_ram_size,
125 const char *boot_device,
126 const char *kernel_filename,
127 const char *kernel_cmdline,
128 const char *initrd_filename,
129 const char *cpu_model)
131 CPUState *env = NULL;
132 MemoryRegion *sysmem = get_system_memory();
133 MemoryRegion *ram = g_new(MemoryRegion, 1);
134 ram_addr_t kernel_size = 0;
135 ram_addr_t initrd_offset;
136 ram_addr_t initrd_size = 0;
138 uint8_t *storage_keys;
141 /* s390x ram size detection needs a 16bit multiplier + an increment. So
142 guests > 64GB can be specified in 2MB steps etc. */
143 while ((my_ram_size >> (20 + shift)) > 65535) {
146 my_ram_size = my_ram_size >> (20 + shift) << (20 + shift);
148 /* lets propagate the changed ram size into the global variable. */
149 ram_size = my_ram_size;
152 s390_bus = s390_virtio_bus_init(&my_ram_size);
155 memory_region_init_ram(ram, NULL, "s390.ram", my_ram_size);
156 memory_region_add_subregion(sysmem, 0, ram);
158 /* allocate storage keys */
159 storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE);
162 if (cpu_model == NULL) {
166 ipi_states = g_malloc(sizeof(CPUState *) * smp_cpus);
168 for (i = 0; i < smp_cpus; i++) {
171 tmp_env = cpu_init(cpu_model);
175 ipi_states[i] = tmp_env;
177 tmp_env->exception_index = EXCP_HLT;
178 tmp_env->storage_keys = storage_keys;
182 env->exception_index = 0;
184 if (kernel_filename) {
185 kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0));
187 if (lduw_be_phys(KERN_IMAGE_START) != 0x0dd0) {
188 fprintf(stderr, "Specified image is not an s390 boot image\n");
192 env->psw.addr = KERN_IMAGE_START;
193 env->psw.mask = 0x0000000180000000ULL;
195 ram_addr_t bios_size = 0;
198 /* Load zipl bootloader */
199 if (bios_name == NULL) {
200 bios_name = ZIPL_FILENAME;
203 bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
204 bios_size = load_image(bios_filename, qemu_get_ram_ptr(ZIPL_LOAD_ADDR));
205 g_free(bios_filename);
207 if ((long)bios_size < 0) {
208 hw_error("could not load bootloader '%s'\n", bios_name);
211 if (bios_size > 4096) {
212 hw_error("stage1 bootloader is > 4k\n");
215 env->psw.addr = ZIPL_START;
216 env->psw.mask = 0x0000000180000000ULL;
219 if (initrd_filename) {
220 initrd_offset = INITRD_START;
221 while (kernel_size + 0x100000 > initrd_offset) {
222 initrd_offset += 0x100000;
224 initrd_size = load_image(initrd_filename, qemu_get_ram_ptr(initrd_offset));
226 stq_be_phys(INITRD_PARM_START, initrd_offset);
227 stq_be_phys(INITRD_PARM_SIZE, initrd_size);
230 if (kernel_cmdline) {
231 cpu_physical_memory_write(KERN_PARM_AREA, kernel_cmdline,
232 strlen(kernel_cmdline));
235 /* Create VirtIO network adapters */
236 for(i = 0; i < nb_nics; i++) {
237 NICInfo *nd = &nd_table[i];
241 nd->model = g_strdup("virtio");
244 if (strcmp(nd->model, "virtio")) {
245 fprintf(stderr, "S390 only supports VirtIO nics\n");
249 dev = qdev_create((BusState *)s390_bus, "virtio-net-s390");
250 qdev_set_nic_properties(dev, nd);
251 qdev_init_nofail(dev);
254 /* Create VirtIO disk drives */
255 for(i = 0; i < MAX_BLK_DEVS; i++) {
259 dinfo = drive_get(IF_IDE, 0, i);
264 dev = qdev_create((BusState *)s390_bus, "virtio-blk-s390");
265 qdev_prop_set_drive_nofail(dev, "drive", dinfo->bdrv);
266 qdev_init_nofail(dev);
270 static QEMUMachine s390_machine = {
271 .name = "s390-virtio",
273 .desc = "VirtIO based S390 machine",
283 static void s390_machine_init(void)
285 qemu_register_machine(&s390_machine);
288 machine_init(s390_machine_init);