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"
16 #include "hw/s390x/s390_flic.h"
19 #include "virtio-ccw.h"
21 void io_subsystem_reset(void)
23 DeviceState
*css
, *sclp
, *flic
;
25 css
= DEVICE(object_resolve_path_type("", "virtual-css-bridge", NULL
));
29 sclp
= DEVICE(object_resolve_path_type("",
30 "s390-sclp-event-facility", NULL
));
34 flic
= DEVICE(object_resolve_path_type("", "s390-flic", NULL
));
40 static int virtio_ccw_hcall_notify(const uint64_t *args
)
42 uint64_t subch_id
= args
[0];
43 uint64_t queue
= args
[1];
45 int cssid
, ssid
, schid
, m
;
47 if (ioinst_disassemble_sch_ident(subch_id
, &m
, &cssid
, &ssid
, &schid
)) {
50 sch
= css_find_subch(m
, cssid
, ssid
, schid
);
51 if (!sch
|| !css_subch_visible(sch
)) {
54 if (queue
>= VIRTIO_PCI_QUEUE_MAX
) {
57 virtio_queue_notify(virtio_ccw_get_vdev(sch
), queue
);
62 static int virtio_ccw_hcall_early_printk(const uint64_t *args
)
64 uint64_t mem
= args
[0];
73 static void virtio_ccw_register_hcalls(void)
75 s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY
,
76 virtio_ccw_hcall_notify
);
77 /* Tolerate early printk. */
78 s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY
,
79 virtio_ccw_hcall_early_printk
);
82 static void ccw_init(MachineState
*machine
)
84 ram_addr_t my_ram_size
= machine
->ram_size
;
85 MemoryRegion
*sysmem
= get_system_memory();
86 MemoryRegion
*ram
= g_new(MemoryRegion
, 1);
88 uint8_t *storage_keys
;
90 VirtualCssBus
*css_bus
;
92 /* s390x ram size detection needs a 16bit multiplier + an increment. So
93 guests > 64GB can be specified in 2MB steps etc. */
94 while ((my_ram_size
>> (20 + shift
)) > 65535) {
97 my_ram_size
= my_ram_size
>> (20 + shift
) << (20 + shift
);
99 /* let's propagate the changed ram size into the global variable. */
100 ram_size
= my_ram_size
;
103 css_bus
= virtual_css_bus_init();
105 s390_init_ipl_dev(machine
->kernel_filename
, machine
->kernel_cmdline
,
106 machine
->initrd_filename
, "s390-ccw.img");
109 /* register hypercalls */
110 virtio_ccw_register_hcalls();
113 memory_region_init_ram(ram
, NULL
, "s390.ram", my_ram_size
);
114 vmstate_register_ram_global(ram
);
115 memory_region_add_subregion(sysmem
, 0, ram
);
117 /* allocate storage keys */
118 storage_keys
= g_malloc0(my_ram_size
/ TARGET_PAGE_SIZE
);
121 s390_init_cpus(machine
->cpu_model
, storage_keys
);
124 kvm_s390_enable_css_support(s390_cpu_addr2state(0));
127 * Create virtual css and set it as default so that non mcss-e
128 * enabled guests only see virtio devices.
130 ret
= css_create_css_image(VIRTUAL_CSSID
, true);
133 /* Create VirtIO network adapters */
134 s390_create_virtio_net(BUS(css_bus
), "virtio-net-ccw");
137 static QEMUMachine ccw_machine
= {
138 .name
= "s390-ccw-virtio",
140 .desc
= "VirtIO-ccw based S390 machine",
142 .block_default_type
= IF_VIRTIO
,
152 static void ccw_machine_init(void)
154 qemu_register_machine(&ccw_machine
);
157 machine_init(ccw_machine_init
)