1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* SCLP Support
*
* Copyright IBM, Corp. 2012
*
* Authors:
* Christian Borntraeger <borntraeger@de.ibm.com>
* Heinz Graalfs <graalfs@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at your
* option) any later version. See the COPYING file in the top-level directory.
*
*/
#include "cpu.h"
#include "sysemu/kvm.h"
#include "exec/memory.h"
#include "hw/s390x/sclp.h"
static inline S390SCLPDevice *get_event_facility(void)
{
ObjectProperty *op = object_property_find(qdev_get_machine(),
"s390-sclp-event-facility",
NULL);
assert(op);
return op->opaque;
}
/* Provide information about the configuration, CPUs and storage */
static void read_SCP_info(SCCB *sccb)
{
ReadInfo *read_info = (ReadInfo *) sccb;
int shift = 0;
while ((ram_size >> (20 + shift)) > 65535) {
shift++;
}
read_info->rnmax = cpu_to_be16(ram_size >> (20 + shift));
read_info->rnsize = 1 << shift;
sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
}
static void sclp_execute(SCCB *sccb, uint64_t code)
{
S390SCLPDevice *sdev = get_event_facility();
switch (code) {
case SCLP_CMDW_READ_SCP_INFO:
case SCLP_CMDW_READ_SCP_INFO_FORCED:
read_SCP_info(sccb);
break;
default:
sdev->sclp_command_handler(sdev->ef, sccb, code);
break;
}
}
int sclp_service_call(uint32_t sccb, uint64_t code)
{
int r = 0;
SCCB work_sccb;
hwaddr sccb_len = sizeof(SCCB);
/* first some basic checks on program checks */
if (cpu_physical_memory_is_io(sccb)) {
r = -PGM_ADDRESSING;
goto out;
}
if (sccb & ~0x7ffffff8ul) {
r = -PGM_SPECIFICATION;
goto out;
}
/*
* we want to work on a private copy of the sccb, to prevent guests
* from playing dirty tricks by modifying the memory content after
* the host has checked the values
*/
cpu_physical_memory_read(sccb, &work_sccb, sccb_len);
/* Valid sccb sizes */
if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) ||
be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) {
r = -PGM_SPECIFICATION;
goto out;
}
sclp_execute((SCCB *)&work_sccb, code);
cpu_physical_memory_write(sccb, &work_sccb,
be16_to_cpu(work_sccb.h.length));
sclp_service_interrupt(sccb);
out:
return r;
}
void sclp_service_interrupt(uint32_t sccb)
{
S390SCLPDevice *sdev = get_event_facility();
uint32_t param = sccb & ~3;
/* Indicate whether an event is still pending */
param |= sdev->event_pending(sdev->ef) ? 1 : 0;
if (!param) {
/* No need to send an interrupt, there's nothing to be notified about */
return;
}
s390_sclp_extint(param);
}
/* qemu object creation and initialization functions */
void s390_sclp_init(void)
{
DeviceState *dev = qdev_create(NULL, "s390-sclp-event-facility");
object_property_add_child(qdev_get_machine(), "s390-sclp-event-facility",
OBJECT(dev), NULL);
qdev_init_nofail(dev);
}
static int s390_sclp_dev_init(SysBusDevice *dev)
{
int r;
S390SCLPDevice *sdev = (S390SCLPDevice *)dev;
S390SCLPDeviceClass *sclp = SCLP_S390_DEVICE_GET_CLASS(dev);
r = sclp->init(sdev);
if (!r) {
assert(sdev->event_pending);
assert(sdev->sclp_command_handler);
}
return r;
}
static void s390_sclp_device_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *dc = SYS_BUS_DEVICE_CLASS(klass);
dc->init = s390_sclp_dev_init;
}
static const TypeInfo s390_sclp_device_info = {
.name = TYPE_DEVICE_S390_SCLP,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(S390SCLPDevice),
.class_init = s390_sclp_device_class_init,
.class_size = sizeof(S390SCLPDeviceClass),
.abstract = true,
};
static void s390_sclp_register_types(void)
{
type_register_static(&s390_sclp_device_info);
}
type_init(s390_sclp_register_types)
|
