/* * QEMU S390 virtio target * * Copyright (c) 2009 Alexander Graf <agraf@suse.de> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #include "hw.h" #include "block.h" #include "blockdev.h" #include "sysemu.h" #include "net.h" #include "boards.h" #include "monitor.h" #include "loader.h" #include "elf.h" #include "hw/virtio.h" #include "hw/sysbus.h" #include "kvm.h" #include "hw/s390-virtio-bus.h" //#define DEBUG_S390 #ifdef DEBUG_S390 #define dprintf(fmt, ...) \ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) #else #define dprintf(fmt, ...) \ do { } while (0) #endif #define KVM_S390_VIRTIO_NOTIFY 0 #define KVM_S390_VIRTIO_RESET 1 #define KVM_S390_VIRTIO_SET_STATUS 2 #define KERN_IMAGE_START 0x010000UL #define KERN_PARM_AREA 0x010480UL #define INITRD_START 0x800000UL #define INITRD_PARM_START 0x010408UL #define INITRD_PARM_SIZE 0x010410UL #define PARMFILE_START 0x001000UL #define ZIPL_START 0x009000UL #define ZIPL_LOAD_ADDR 0x009000UL #define ZIPL_FILENAME "s390-zipl.rom" #define MAX_BLK_DEVS 10 static VirtIOS390Bus *s390_bus; static CPUState **ipi_states; void irq_info(Monitor *mon); void pic_info(Monitor *mon); void irq_info(Monitor *mon) { } void pic_info(Monitor *mon) { } CPUState *s390_cpu_addr2state(uint16_t cpu_addr) { if (cpu_addr >= smp_cpus) { return NULL; } return ipi_states[cpu_addr]; } int s390_virtio_hypercall(CPUState *env, uint64_t mem, uint64_t hypercall) { int r = 0, i; dprintf("KVM hypercall: %ld\n", hypercall); switch (hypercall) { case KVM_S390_VIRTIO_NOTIFY: if (mem > ram_size) { VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus, mem, &i); if (dev) { virtio_queue_notify(dev->vdev, i); } else { r = -EINVAL; } } else { /* Early printk */ } break; case KVM_S390_VIRTIO_RESET: { VirtIOS390Device *dev; dev = s390_virtio_bus_find_mem(s390_bus, mem); virtio_reset(dev->vdev); s390_virtio_device_sync(dev); break; } case KVM_S390_VIRTIO_SET_STATUS: { VirtIOS390Device *dev; dev = s390_virtio_bus_find_mem(s390_bus, mem); if (dev) { s390_virtio_device_update_status(dev); } else { r = -EINVAL; } break; } default: r = -EINVAL; break; } return r; } /* PC hardware initialisation */ static void s390_init(ram_addr_t my_ram_size, const char *boot_device, const char *kernel_filename, const char *kernel_cmdline, const char *initrd_filename, const char *cpu_model) { CPUState *env = NULL; ram_addr_t ram_addr; ram_addr_t kernel_size = 0; ram_addr_t initrd_offset; ram_addr_t initrd_size = 0; int shift = 0; uint8_t *storage_keys; int i; /* s390x ram size detection needs a 16bit multiplier + an increment. So guests > 64GB can be specified in 2MB steps etc. */ while ((my_ram_size >> (20 + shift)) > 65535) { shift++; } my_ram_size = my_ram_size >> (20 + shift) << (20 + shift); /* lets propagate the changed ram size into the global variable. */ ram_size = my_ram_size; /* get a BUS */ s390_bus = s390_virtio_bus_init(&my_ram_size); /* allocate RAM */ ram_addr = qemu_ram_alloc(NULL, "s390.ram", my_ram_size); cpu_register_physical_memory(0, my_ram_size, ram_addr); /* allocate storage keys */ storage_keys = qemu_mallocz(my_ram_size / TARGET_PAGE_SIZE); /* init CPUs */ if (cpu_model == NULL) { cpu_model = "host"; } ipi_states = qemu_malloc(sizeof(CPUState *) * smp_cpus); for (i = 0; i < smp_cpus; i++) { CPUState *tmp_env; tmp_env = cpu_init(cpu_model); if (!env) { env = tmp_env; } ipi_states[i] = tmp_env; tmp_env->halted = 1; tmp_env->exception_index = EXCP_HLT; tmp_env->storage_keys = storage_keys; } env->halted = 0; env->exception_index = 0; if (kernel_filename) { kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0)); if (lduw_phys(KERN_IMAGE_START) != 0x0dd0) { fprintf(stderr, "Specified image is not an s390 boot image\n"); exit(1); } env->psw.addr = KERN_IMAGE_START; env->psw.mask = 0x0000000180000000ULL; } else { ram_addr_t bios_size = 0; char *bios_filename; /* Load zipl bootloader */ if (bios_name == NULL) { bios_name = ZIPL_FILENAME; } bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); bios_size = load_image(bios_filename, qemu_get_ram_ptr(ZIPL_LOAD_ADDR)); qemu_free(bios_filename); if ((long)bios_size < 0) { hw_error("could not load bootloader '%s'\n", bios_name); } if (bios_size > 4096) { hw_error("stage1 bootloader is > 4k\n"); } env->psw.addr = ZIPL_START; env->psw.mask = 0x0000000180000000ULL; } if (initrd_filename) { initrd_offset = INITRD_START; while (kernel_size + 0x100000 > initrd_offset) { initrd_offset += 0x100000; } initrd_size = load_image(initrd_filename, qemu_get_ram_ptr(initrd_offset)); stq_phys(INITRD_PARM_START, initrd_offset); stq_phys(INITRD_PARM_SIZE, initrd_size); } if (kernel_cmdline) { cpu_physical_memory_write(KERN_PARM_AREA, kernel_cmdline, strlen(kernel_cmdline)); } /* Create VirtIO network adapters */ for(i = 0; i < nb_nics; i++) { NICInfo *nd = &nd_table[i]; DeviceState *dev; if (!nd->model) { nd->model = qemu_strdup("virtio"); } if (strcmp(nd->model, "virtio")) { fprintf(stderr, "S390 only supports VirtIO nics\n"); exit(1); } dev = qdev_create((BusState *)s390_bus, "virtio-net-s390"); qdev_set_nic_properties(dev, nd); qdev_init_nofail(dev); } /* Create VirtIO disk drives */ for(i = 0; i < MAX_BLK_DEVS; i++) { DriveInfo *dinfo; DeviceState *dev; dinfo = drive_get(IF_IDE, 0, i); if (!dinfo) { continue; } dev = qdev_create((BusState *)s390_bus, "virtio-blk-s390"); qdev_prop_set_drive_nofail(dev, "drive", dinfo->bdrv); qdev_init_nofail(dev); } } static QEMUMachine s390_machine = { .name = "s390-virtio", .alias = "s390", .desc = "VirtIO based S390 machine", .init = s390_init, .no_serial = 1, .no_parallel = 1, .use_virtcon = 1, .no_vga = 1, .max_cpus = 255, .is_default = 1, }; static void s390_machine_init(void) { qemu_register_machine(&s390_machine); } machine_init(s390_machine_init);