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/*
* 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 "sysemu/sysemu.h"
#include "hw/s390x/sclp.h"
#include "hw/s390x/event-facility.h"
static inline SCLPEventFacility *get_event_facility(void)
{
ObjectProperty *op = object_property_find(qdev_get_machine(),
TYPE_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;
CPUState *cpu;
int shift = 0;
int cpu_count = 0;
int i = 0;
CPU_FOREACH(cpu) {
cpu_count++;
}
/* CPU information */
read_info->entries_cpu = cpu_to_be16(cpu_count);
read_info->offset_cpu = cpu_to_be16(offsetof(ReadInfo, entries));
read_info->highest_cpu = cpu_to_be16(max_cpus);
for (i = 0; i < cpu_count; i++) {
read_info->entries[i].address = i;
read_info->entries[i].type = 0;
}
read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO);
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);
}
/* Provide information about the CPU */
static void sclp_read_cpu_info(SCCB *sccb)
{
ReadCpuInfo *cpu_info = (ReadCpuInfo *) sccb;
CPUState *cpu;
int cpu_count = 0;
int i = 0;
CPU_FOREACH(cpu) {
cpu_count++;
}
cpu_info->nr_configured = cpu_to_be16(cpu_count);
cpu_info->offset_configured = cpu_to_be16(offsetof(ReadCpuInfo, entries));
cpu_info->nr_standby = cpu_to_be16(0);
/* The standby offset is 16-byte for each CPU */
cpu_info->offset_standby = cpu_to_be16(cpu_info->offset_configured
+ cpu_info->nr_configured*sizeof(CPUEntry));
for (i = 0; i < cpu_count; i++) {
cpu_info->entries[i].address = i;
cpu_info->entries[i].type = 0;
}
sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
}
static void sclp_execute(SCCB *sccb, uint32_t code)
{
SCLPEventFacility *ef = get_event_facility();
SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
switch (code & SCLP_CMD_CODE_MASK) {
case SCLP_CMDW_READ_SCP_INFO:
case SCLP_CMDW_READ_SCP_INFO_FORCED:
read_SCP_info(sccb);
break;
case SCLP_CMDW_READ_CPU_INFO:
sclp_read_cpu_info(sccb);
break;
default:
efc->command_handler(ef, sccb, code);
break;
}
}
int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
{
int r = 0;
SCCB work_sccb;
hwaddr sccb_len = sizeof(SCCB);
/* first some basic checks on program checks */
if (env->psw.mask & PSW_MASK_PSTATE) {
r = -PGM_PRIVILEGED;
goto out;
}
if (cpu_physical_memory_is_io(sccb)) {
r = -PGM_ADDRESSING;
goto out;
}
if ((sccb & ~0x1fffUL) == 0 || (sccb & ~0x1fffUL) == env->psa
|| (sccb & ~0x7ffffff8UL) != 0) {
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)
{
SCLPEventFacility *ef = get_event_facility();
SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
uint32_t param = sccb & ~3;
/* Indicate whether an event is still pending */
param |= efc->event_pending(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, TYPE_SCLP_EVENT_FACILITY);
object_property_add_child(qdev_get_machine(), TYPE_SCLP_EVENT_FACILITY,
OBJECT(dev), NULL);
qdev_init_nofail(dev);
}
sclpMemoryHotplugDev *init_sclp_memory_hotplug_dev(void)
{
DeviceState *dev;
dev = qdev_create(NULL, TYPE_SCLP_MEMORY_HOTPLUG_DEV);
object_property_add_child(qdev_get_machine(),
TYPE_SCLP_MEMORY_HOTPLUG_DEV,
OBJECT(dev), NULL);
qdev_init_nofail(dev);
return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path(
TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL));
}
sclpMemoryHotplugDev *get_sclp_memory_hotplug_dev(void)
{
return SCLP_MEMORY_HOTPLUG_DEV(object_resolve_path(
TYPE_SCLP_MEMORY_HOTPLUG_DEV, NULL));
}
static TypeInfo sclp_memory_hotplug_dev_info = {
.name = TYPE_SCLP_MEMORY_HOTPLUG_DEV,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(sclpMemoryHotplugDev),
};
static void register_types(void)
{
type_register_static(&sclp_memory_hotplug_dev_info);
}
type_init(register_types);
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