From b73d35311098585dbdb375fdf8369b16c8222e12 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Fri, 25 Jan 2013 01:16:39 +0100 Subject: s390: Move hw files to hw/s390x This moves all files only used by s390 system emulation to hw/s390x. Signed-off-by: Alexander Graf Acked-by: Christian Borntraeger --- hw/s390x/s390-virtio.c | 290 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 290 insertions(+) create mode 100644 hw/s390x/s390-virtio.c (limited to 'hw/s390x/s390-virtio.c') diff --git a/hw/s390x/s390-virtio.c b/hw/s390x/s390-virtio.c new file mode 100644 index 0000000000..a8a489dc3e --- /dev/null +++ b/hw/s390x/s390-virtio.c @@ -0,0 +1,290 @@ +/* + * QEMU S390 virtio target + * + * Copyright (c) 2009 Alexander Graf + * Copyright IBM Corp 2012 + * + * 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. + * + * Contributions after 2012-10-29 are licensed under the terms of the + * GNU GPL, version 2 or (at your option) any later version. + * + * You should have received a copy of the GNU (Lesser) General Public + * License along with this library; if not, see . + */ + +#include "hw/hw.h" +#include "block/block.h" +#include "sysemu/blockdev.h" +#include "sysemu/sysemu.h" +#include "net/net.h" +#include "hw/boards.h" +#include "monitor/monitor.h" +#include "hw/loader.h" +#include "hw/virtio.h" +#include "hw/sysbus.h" +#include "sysemu/kvm.h" +#include "exec/address-spaces.h" + +#include "hw/s390x/s390-virtio-bus.h" +#include "hw/s390x/sclp.h" +#include "hw/s390x/s390-virtio.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 MAX_BLK_DEVS 10 + +static VirtIOS390Bus *s390_bus; +static S390CPU **ipi_states; + +S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) +{ + if (cpu_addr >= smp_cpus) { + return NULL; + } + + return ipi_states[cpu_addr]; +} + +static int s390_virtio_hcall_notify(const uint64_t *args) +{ + uint64_t mem = args[0]; + int r = 0, i; + + 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 */ + } + return r; +} + +static int s390_virtio_hcall_reset(const uint64_t *args) +{ + uint64_t mem = args[0]; + VirtIOS390Device *dev; + + dev = s390_virtio_bus_find_mem(s390_bus, mem); + virtio_reset(dev->vdev); + stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0); + s390_virtio_device_sync(dev); + s390_virtio_reset_idx(dev); + + return 0; +} + +static int s390_virtio_hcall_set_status(const uint64_t *args) +{ + uint64_t mem = args[0]; + int r = 0; + VirtIOS390Device *dev; + + dev = s390_virtio_bus_find_mem(s390_bus, mem); + if (dev) { + s390_virtio_device_update_status(dev); + } else { + r = -EINVAL; + } + return r; +} + +static void s390_virtio_register_hcalls(void) +{ + s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY, + s390_virtio_hcall_notify); + s390_register_virtio_hypercall(KVM_S390_VIRTIO_RESET, + s390_virtio_hcall_reset); + s390_register_virtio_hypercall(KVM_S390_VIRTIO_SET_STATUS, + s390_virtio_hcall_set_status); +} + +/* + * The number of running CPUs. On s390 a shutdown is the state of all CPUs + * being either stopped or disabled (for interrupts) waiting. We have to + * track this number to call the shutdown sequence accordingly. This + * number is modified either on startup or while holding the big qemu lock. + */ +static unsigned s390_running_cpus; + +void s390_add_running_cpu(CPUS390XState *env) +{ + if (env->halted) { + s390_running_cpus++; + env->halted = 0; + env->exception_index = -1; + } +} + +unsigned s390_del_running_cpu(CPUS390XState *env) +{ + if (env->halted == 0) { + assert(s390_running_cpus >= 1); + s390_running_cpus--; + env->halted = 1; + env->exception_index = EXCP_HLT; + } + return s390_running_cpus; +} + +void s390_init_ipl_dev(const char *kernel_filename, + const char *kernel_cmdline, + const char *initrd_filename) +{ + DeviceState *dev; + + dev = qdev_create(NULL, "s390-ipl"); + if (kernel_filename) { + qdev_prop_set_string(dev, "kernel", kernel_filename); + } + if (initrd_filename) { + qdev_prop_set_string(dev, "initrd", initrd_filename); + } + qdev_prop_set_string(dev, "cmdline", kernel_cmdline); + qdev_init_nofail(dev); +} + +void s390_init_cpus(const char *cpu_model, uint8_t *storage_keys) +{ + int i; + + if (cpu_model == NULL) { + cpu_model = "host"; + } + + ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus); + + for (i = 0; i < smp_cpus; i++) { + S390CPU *cpu; + + cpu = cpu_s390x_init(cpu_model); + + ipi_states[i] = cpu; + cpu->env.halted = 1; + cpu->env.exception_index = EXCP_HLT; + cpu->env.storage_keys = storage_keys; + } +} + + +void s390_create_virtio_net(BusState *bus, const char *name) +{ + int i; + + for (i = 0; i < nb_nics; i++) { + NICInfo *nd = &nd_table[i]; + DeviceState *dev; + + if (!nd->model) { + nd->model = g_strdup("virtio"); + } + + if (strcmp(nd->model, "virtio")) { + fprintf(stderr, "S390 only supports VirtIO nics\n"); + exit(1); + } + + dev = qdev_create(bus, name); + qdev_set_nic_properties(dev, nd); + qdev_init_nofail(dev); + } +} + +/* PC hardware initialisation */ +static void s390_init(QEMUMachineInitArgs *args) +{ + ram_addr_t my_ram_size = args->ram_size; + MemoryRegion *sysmem = get_system_memory(); + MemoryRegion *ram = g_new(MemoryRegion, 1); + int shift = 0; + uint8_t *storage_keys; + void *virtio_region; + hwaddr virtio_region_len; + hwaddr virtio_region_start; + + /* 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); + s390_sclp_init(); + s390_init_ipl_dev(args->kernel_filename, args->kernel_cmdline, + args->initrd_filename); + + /* register hypercalls */ + s390_virtio_register_hcalls(); + + /* allocate RAM */ + memory_region_init_ram(ram, "s390.ram", my_ram_size); + vmstate_register_ram_global(ram); + memory_region_add_subregion(sysmem, 0, ram); + + /* clear virtio region */ + virtio_region_len = my_ram_size - ram_size; + virtio_region_start = ram_size; + virtio_region = cpu_physical_memory_map(virtio_region_start, + &virtio_region_len, true); + memset(virtio_region, 0, virtio_region_len); + cpu_physical_memory_unmap(virtio_region, virtio_region_len, 1, + virtio_region_len); + + /* allocate storage keys */ + storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE); + + /* init CPUs */ + s390_init_cpus(args->cpu_model, storage_keys); + + /* Create VirtIO network adapters */ + s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390"); +} + +static QEMUMachine s390_machine = { + .name = "s390-virtio", + .alias = "s390", + .desc = "VirtIO based S390 machine", + .init = s390_init, + .block_default_type = IF_VIRTIO, + .no_cdrom = 1, + .no_floppy = 1, + .no_serial = 1, + .no_parallel = 1, + .no_sdcard = 1, + .use_virtcon = 1, + .max_cpus = 255, + .is_default = 1, + DEFAULT_MACHINE_OPTIONS, +}; + +static void s390_machine_init(void) +{ + qemu_register_machine(&s390_machine); +} + +machine_init(s390_machine_init); -- cgit v1.2.1