4 * Copyright 2012 IBM Corp.
5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
7 * This work is licensed under the terms of the GNU GPL, version 2 or (at
8 * your option) any later version. See the COPYING file in the top-level
12 #include "hw/boards.h"
13 #include "exec/address-spaces.h"
14 #include "s390-virtio.h"
15 #include "hw/s390x/sclp.h"
18 #include "virtio-ccw.h"
20 static int virtio_ccw_hcall_notify(const uint64_t *args)
22 uint64_t subch_id = args[0];
23 uint64_t queue = args[1];
25 int cssid, ssid, schid, m;
27 if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
30 sch = css_find_subch(m, cssid, ssid, schid);
31 if (!sch || !css_subch_visible(sch)) {
34 if (queue >= VIRTIO_PCI_QUEUE_MAX) {
37 virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
42 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
44 uint64_t mem = args[0];
53 static void virtio_ccw_register_hcalls(void)
55 s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
56 virtio_ccw_hcall_notify);
57 /* Tolerate early printk. */
58 s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
59 virtio_ccw_hcall_early_printk);
62 static void ccw_init(QEMUMachineInitArgs *args)
64 ram_addr_t my_ram_size = args->ram_size;
65 MemoryRegion *sysmem = get_system_memory();
66 MemoryRegion *ram = g_new(MemoryRegion, 1);
68 uint8_t *storage_keys;
70 VirtualCssBus *css_bus;
72 /* s390x ram size detection needs a 16bit multiplier + an increment. So
73 guests > 64GB can be specified in 2MB steps etc. */
74 while ((my_ram_size >> (20 + shift)) > 65535) {
77 my_ram_size = my_ram_size >> (20 + shift) << (20 + shift);
79 /* let's propagate the changed ram size into the global variable. */
80 ram_size = my_ram_size;
83 css_bus = virtual_css_bus_init();
85 s390_init_ipl_dev(args->kernel_filename, args->kernel_cmdline,
86 args->initrd_filename);
88 /* register hypercalls */
89 virtio_ccw_register_hcalls();
92 memory_region_init_ram(ram, "s390.ram", my_ram_size);
93 vmstate_register_ram_global(ram);
94 memory_region_add_subregion(sysmem, 0, ram);
96 /* allocate storage keys */
97 storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE);
100 s390_init_cpus(args->cpu_model, storage_keys);
103 kvm_s390_enable_css_support(s390_cpu_addr2state(0));
106 * Create virtual css and set it as default so that non mcss-e
107 * enabled guests only see virtio devices.
109 ret = css_create_css_image(VIRTUAL_CSSID, true);
112 /* Create VirtIO network adapters */
113 s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
116 static QEMUMachine ccw_machine = {
117 .name = "s390-ccw-virtio",
119 .desc = "VirtIO-ccw based S390 machine",
121 .block_default_type = IF_VIRTIO,
129 DEFAULT_MACHINE_OPTIONS,
132 static void ccw_machine_init(void)
134 qemu_register_machine(&ccw_machine);
137 machine_init(ccw_machine_init)