[mirror_qemu.git] / hw / s390x / sclp.c

/*
 * 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 "qemu/osdep.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "cpu.h"
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "hw/s390x/sclp.h"
#include "hw/s390x/event-facility.h"
#include "hw/s390x/s390-pci-bus.h"
#include "hw/s390x/ipl.h"

static inline SCLPDevice *get_sclp_device(void)
{
    static SCLPDevice *sclp;

    if (!sclp) {
        sclp = SCLP(object_resolve_path_type("", TYPE_SCLP, NULL));
    }
    return sclp;
}

static inline bool sclp_command_code_valid(uint32_t code)
{
    switch (code & SCLP_CMD_CODE_MASK) {
    case SCLP_CMDW_READ_SCP_INFO:
    case SCLP_CMDW_READ_SCP_INFO_FORCED:
    case SCLP_CMDW_READ_CPU_INFO:
    case SCLP_CMDW_CONFIGURE_IOA:
    case SCLP_CMDW_DECONFIGURE_IOA:
    case SCLP_CMD_READ_EVENT_DATA:
    case SCLP_CMD_WRITE_EVENT_DATA:
    case SCLP_CMD_WRITE_EVENT_MASK:
        return true;
    }
    return false;
}

static bool sccb_verify_boundary(uint64_t sccb_addr, uint16_t sccb_len,
                                 uint32_t code)
{
    uint64_t sccb_max_addr = sccb_addr + sccb_len - 1;
    uint64_t sccb_boundary = (sccb_addr & PAGE_MASK) + PAGE_SIZE;

    switch (code & SCLP_CMD_CODE_MASK) {
    case SCLP_CMDW_READ_SCP_INFO:
    case SCLP_CMDW_READ_SCP_INFO_FORCED:
    case SCLP_CMDW_READ_CPU_INFO:
        /*
         * An extended-length SCCB is only allowed for Read SCP/CPU Info and
         * is allowed to exceed the 4k boundary. The respective commands will
         * set the length field to the required length if an insufficient
         * SCCB length is provided.
         */
        if (s390_has_feat(S390_FEAT_EXTENDED_LENGTH_SCCB)) {
            return true;
        }
        /* fallthrough */
    default:
        if (sccb_max_addr < sccb_boundary) {
            return true;
        }
    }

    return false;
}

static void prepare_cpu_entries(MachineState *ms, CPUEntry *entry, int *count)
{
    uint8_t features[SCCB_CPU_FEATURE_LEN] = { 0 };
    int i;

    s390_get_feat_block(S390_FEAT_TYPE_SCLP_CPU, features);
    for (i = 0, *count = 0; i < ms->possible_cpus->len; i++) {
        if (!ms->possible_cpus->cpus[i].cpu) {
            continue;
        }
        entry[*count].address = ms->possible_cpus->cpus[i].arch_id;
        entry[*count].type = 0;
        memcpy(entry[*count].features, features, sizeof(features));
        (*count)++;
    }
}

#define SCCB_REQ_LEN(s, max_cpus) (sizeof(s) + max_cpus * sizeof(CPUEntry))

static inline bool ext_len_sccb_supported(SCCBHeader header)
{
    return s390_has_feat(S390_FEAT_EXTENDED_LENGTH_SCCB) &&
           header.control_mask[2] & SCLP_VARIABLE_LENGTH_RESPONSE;
}

/* Provide information about the configuration, CPUs and storage */
static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
{
    ReadInfo *read_info = (ReadInfo *) sccb;
    MachineState *machine = MACHINE(qdev_get_machine());
    int cpu_count;
    int rnsize, rnmax;
    IplParameterBlock *ipib = s390_ipl_get_iplb();
    int required_len = SCCB_REQ_LEN(ReadInfo, machine->possible_cpus->len);
    int offset_cpu = s390_has_feat(S390_FEAT_EXTENDED_LENGTH_SCCB) ?
                     offsetof(ReadInfo, entries) :
                     SCLP_READ_SCP_INFO_FIXED_CPU_OFFSET;
    CPUEntry *entries_start = (void *)sccb + offset_cpu;

    if (be16_to_cpu(sccb->h.length) < required_len) {
        if (ext_len_sccb_supported(sccb->h)) {
            sccb->h.length = cpu_to_be16(required_len);
        }
        sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
        return;
    }

    /* CPU information */
    prepare_cpu_entries(machine, entries_start, &cpu_count);
    read_info->entries_cpu = cpu_to_be16(cpu_count);
    read_info->offset_cpu = cpu_to_be16(offset_cpu);
    read_info->highest_cpu = cpu_to_be16(machine->smp.max_cpus - 1);

    read_info->ibc_val = cpu_to_be32(s390_get_ibc_val());

    /* Configuration Characteristic (Extension) */
    s390_get_feat_block(S390_FEAT_TYPE_SCLP_CONF_CHAR,
                         read_info->conf_char);
    s390_get_feat_block(S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT,
                         read_info->conf_char_ext);

    read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO |
                                        SCLP_HAS_IOA_RECONFIG);

    read_info->mha_pow = s390_get_mha_pow();
    read_info->hmfai = cpu_to_be32(s390_get_hmfai());

    rnsize = 1 << (sclp->increment_size - 20);
    if (rnsize <= 128) {
        read_info->rnsize = rnsize;
    } else {
        read_info->rnsize = 0;
        read_info->rnsize2 = cpu_to_be32(rnsize);
    }

    /* we don't support standby memory, maxram_size is never exposed */
    rnmax = machine->ram_size >> sclp->increment_size;
    if (rnmax < 0x10000) {
        read_info->rnmax = cpu_to_be16(rnmax);
    } else {
        read_info->rnmax = cpu_to_be16(0);
        read_info->rnmax2 = cpu_to_be64(rnmax);
    }

    if (ipib && ipib->flags & DIAG308_FLAGS_LP_VALID) {
        memcpy(&read_info->loadparm, &ipib->loadparm,
               sizeof(read_info->loadparm));
    } else {
        s390_ipl_set_loadparm(read_info->loadparm);
    }

    sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
}

/* Provide information about the CPU */
static void sclp_read_cpu_info(SCLPDevice *sclp, SCCB *sccb)
{
    MachineState *machine = MACHINE(qdev_get_machine());
    ReadCpuInfo *cpu_info = (ReadCpuInfo *) sccb;
    int cpu_count;
    int required_len = SCCB_REQ_LEN(ReadCpuInfo, machine->possible_cpus->len);

    if (be16_to_cpu(sccb->h.length) < required_len) {
        if (ext_len_sccb_supported(sccb->h)) {
            sccb->h.length = cpu_to_be16(required_len);
        }
        sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
        return;
    }

    prepare_cpu_entries(machine, cpu_info->entries, &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));


    sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
}

static void sclp_configure_io_adapter(SCLPDevice *sclp, SCCB *sccb,
                                      bool configure)
{
    int rc;

    if (be16_to_cpu(sccb->h.length) < 16) {
        rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
        goto out_err;
    }

    switch (((IoaCfgSccb *)sccb)->atype) {
    case SCLP_RECONFIG_PCI_ATYPE:
        if (s390_has_feat(S390_FEAT_ZPCI)) {
            if (configure) {
                s390_pci_sclp_configure(sccb);
            } else {
                s390_pci_sclp_deconfigure(sccb);
            }
            return;
        }
        /* fallthrough */
    default:
        rc = SCLP_RC_ADAPTER_TYPE_NOT_RECOGNIZED;
    }

 out_err:
    sccb->h.response_code = cpu_to_be16(rc);
}

static void sclp_execute(SCLPDevice *sclp, SCCB *sccb, uint32_t code)
{
    SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
    SCLPEventFacility *ef = sclp->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:
        sclp_c->read_SCP_info(sclp, sccb);
        break;
    case SCLP_CMDW_READ_CPU_INFO:
        sclp_c->read_cpu_info(sclp, sccb);
        break;
    case SCLP_CMDW_CONFIGURE_IOA:
        sclp_configure_io_adapter(sclp, sccb, true);
        break;
    case SCLP_CMDW_DECONFIGURE_IOA:
        sclp_configure_io_adapter(sclp, sccb, false);
        break;
    default:
        efc->command_handler(ef, sccb, code);
        break;
    }
}

/*
 * We only need the address to have something valid for the
 * service_interrupt call.
 */
#define SCLP_PV_DUMMY_ADDR 0x4000
int sclp_service_call_protected(CPUS390XState *env, uint64_t sccb,
                                uint32_t code)
{
    SCLPDevice *sclp = get_sclp_device();
    SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
    SCCBHeader header;
    g_autofree SCCB *work_sccb = NULL;

    s390_cpu_pv_mem_read(env_archcpu(env), 0, &header, sizeof(SCCBHeader));

    work_sccb = g_malloc0(be16_to_cpu(header.length));
    s390_cpu_pv_mem_read(env_archcpu(env), 0, work_sccb,
                         be16_to_cpu(header.length));

    if (!sclp_command_code_valid(code)) {
        work_sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
        goto out_write;
    }

    if (!sccb_verify_boundary(sccb, be16_to_cpu(work_sccb->h.length), code)) {
        work_sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
        goto out_write;
    }

    sclp_c->execute(sclp, work_sccb, code);
out_write:
    s390_cpu_pv_mem_write(env_archcpu(env), 0, work_sccb,
                          be16_to_cpu(work_sccb->h.length));
    sclp_c->service_interrupt(sclp, SCLP_PV_DUMMY_ADDR);
    return 0;
}

int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
{
    SCLPDevice *sclp = get_sclp_device();
    SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
    SCCBHeader header;
    g_autofree SCCB *work_sccb = NULL;

    /* first some basic checks on program checks */
    if (env->psw.mask & PSW_MASK_PSTATE) {
        return -PGM_PRIVILEGED;
    }
    if (cpu_physical_memory_is_io(sccb)) {
        return -PGM_ADDRESSING;
    }
    if ((sccb & ~0x1fffUL) == 0 || (sccb & ~0x1fffUL) == env->psa
        || (sccb & ~0x7ffffff8UL) != 0) {
        return -PGM_SPECIFICATION;
    }

    /* the header contains the actual length of the sccb */
    cpu_physical_memory_read(sccb, &header, sizeof(SCCBHeader));

    /* Valid sccb sizes */
    if (be16_to_cpu(header.length) < sizeof(SCCBHeader)) {
        return -PGM_SPECIFICATION;
    }

    /*
     * 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
     */
    work_sccb = g_malloc0(be16_to_cpu(header.length));
    cpu_physical_memory_read(sccb, work_sccb, be16_to_cpu(header.length));

    if (!sclp_command_code_valid(code)) {
        work_sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
        goto out_write;
    }

    if (!sccb_verify_boundary(sccb, be16_to_cpu(work_sccb->h.length), code)) {
        work_sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
        goto out_write;
    }

    sclp_c->execute(sclp, work_sccb, code);
out_write:
    cpu_physical_memory_write(sccb, work_sccb,
                              be16_to_cpu(work_sccb->h.length));

    sclp_c->service_interrupt(sclp, sccb);

    return 0;
}

static void service_interrupt(SCLPDevice *sclp, uint32_t sccb)
{
    SCLPEventFacility *ef = sclp->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);
}

void sclp_service_interrupt(uint32_t sccb)
{
    SCLPDevice *sclp = get_sclp_device();
    SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);

    sclp_c->service_interrupt(sclp, sccb);
}

/* qemu object creation and initialization functions */

void s390_sclp_init(void)
{
    Object *new = object_new(TYPE_SCLP);

    object_property_add_child(qdev_get_machine(), TYPE_SCLP, new);
    object_unref(new);
    qdev_realize(DEVICE(new), NULL, &error_fatal);
}

static void sclp_realize(DeviceState *dev, Error **errp)
{
    MachineState *machine = MACHINE(qdev_get_machine());
    SCLPDevice *sclp = SCLP(dev);
    uint64_t hw_limit;
    int ret;

    /*
     * qdev_device_add searches the sysbus for TYPE_SCLP_EVENTS_BUS. As long
     * as we can't find a fitting bus via the qom tree, we have to add the
     * event facility to the sysbus, so e.g. a sclp console can be created.
     */
    if (!sysbus_realize(SYS_BUS_DEVICE(sclp->event_facility), errp)) {
        return;
    }

    ret = s390_set_memory_limit(machine->maxram_size, &hw_limit);
    if (ret == -E2BIG) {
        error_setg(errp, "host supports a maximum of %" PRIu64 " GB",
                   hw_limit / GiB);
    } else if (ret) {
        error_setg(errp, "setting the guest size failed");
    }
}

static void sclp_memory_init(SCLPDevice *sclp)
{
    MachineState *machine = MACHINE(qdev_get_machine());
    MachineClass *machine_class = MACHINE_GET_CLASS(qdev_get_machine());
    ram_addr_t initial_mem = machine->ram_size;
    int increment_size = 20;

    /* The storage increment size is a multiple of 1M and is a power of 2.
     * For some machine types, the number of storage increments must be
     * MAX_STORAGE_INCREMENTS or fewer.
     * The variable 'increment_size' is an exponent of 2 that can be
     * used to calculate the size (in bytes) of an increment. */
    while (machine_class->fixup_ram_size != NULL &&
           (initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
        increment_size++;
    }
    sclp->increment_size = increment_size;
}

static void sclp_init(Object *obj)
{
    SCLPDevice *sclp = SCLP(obj);
    Object *new;

    new = object_new(TYPE_SCLP_EVENT_FACILITY);
    object_property_add_child(obj, TYPE_SCLP_EVENT_FACILITY, new);
    object_unref(new);
    sclp->event_facility = EVENT_FACILITY(new);

    sclp_memory_init(sclp);
}

static void sclp_class_init(ObjectClass *oc, void *data)
{
    SCLPDeviceClass *sc = SCLP_CLASS(oc);
    DeviceClass *dc = DEVICE_CLASS(oc);

    dc->desc = "SCLP (Service-Call Logical Processor)";
    dc->realize = sclp_realize;
    dc->hotpluggable = false;
    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
    /*
     * Reason: Creates TYPE_SCLP_EVENT_FACILITY in sclp_init
     * which is a non-pluggable sysbus device
     */
    dc->user_creatable = false;

    sc->read_SCP_info = read_SCP_info;
    sc->read_cpu_info = sclp_read_cpu_info;
    sc->execute = sclp_execute;
    sc->service_interrupt = service_interrupt;
}

static TypeInfo sclp_info = {
    .name = TYPE_SCLP,
    .parent = TYPE_DEVICE,
    .instance_init = sclp_init,
    .instance_size = sizeof(SCLPDevice),
    .class_init = sclp_class_init,
    .class_size = sizeof(SCLPDeviceClass),
};

static void register_types(void)
{
    type_register_static(&sclp_info);
}
type_init(register_types);
Commit	Line	Data
f6c98f92 HG	1	/*
	2	* SCLP Support
	3	*
	4	* Copyright IBM, Corp. 2012
	5	*
	6	* Authors:
	7	* Christian Borntraeger <borntraeger@de.ibm.com>
	8	* Heinz Graalfs <graalfs@linux.vnet.ibm.com>
	9	*
	10	* This work is licensed under the terms of the GNU GPL, version 2 or (at your
	11	* option) any later version. See the COPYING file in the top-level directory.
	12	*
	13	*/
	14
9615495a	15	#include "qemu/osdep.h"
393fc4c7	16	#include "qemu/units.h"
da34e65c	17	#include "qapi/error.h"
f6c98f92	18	#include "cpu.h"
8cc3aecf	19	#include "sysemu/sysemu.h"
311467f7	20	#include "hw/boards.h"
83c9f4ca	21	#include "hw/s390x/sclp.h"
477a72a1	22	#include "hw/s390x/event-facility.h"
8cba80c3	23	#include "hw/s390x/s390-pci-bus.h"
b038411d	24	#include "hw/s390x/ipl.h"
f6c98f92	25
25a3c5af DH	26	static inline SCLPDevice *get_sclp_device(void)
25a3c5af DH	27	{
989fd865 CB	28	static SCLPDevice *sclp;
	29
	30	if (!sclp) {
	31	sclp = SCLP(object_resolve_path_type("", TYPE_SCLP, NULL));
	32	}
	33	return sclp;
25a3c5af DH	34	}
25a3c5af DH	35
0f73c5b3 JF	36	static inline bool sclp_command_code_valid(uint32_t code)
	37	{
	38	switch (code & SCLP_CMD_CODE_MASK) {
	39	case SCLP_CMDW_READ_SCP_INFO:
	40	case SCLP_CMDW_READ_SCP_INFO_FORCED:
	41	case SCLP_CMDW_READ_CPU_INFO:
	42	case SCLP_CMDW_CONFIGURE_IOA:
	43	case SCLP_CMDW_DECONFIGURE_IOA:
	44	case SCLP_CMD_READ_EVENT_DATA:
	45	case SCLP_CMD_WRITE_EVENT_DATA:
	46	case SCLP_CMD_WRITE_EVENT_MASK:
	47	return true;
	48	}
	49	return false;
	50	}
	51
1ecd6078 CW	52	static bool sccb_verify_boundary(uint64_t sccb_addr, uint16_t sccb_len,
1ecd6078 CW	53	uint32_t code)
db13387c CW	54	{
	55	uint64_t sccb_max_addr = sccb_addr + sccb_len - 1;
	56	uint64_t sccb_boundary = (sccb_addr & PAGE_MASK) + PAGE_SIZE;
	57
1ecd6078 CW	58	switch (code & SCLP_CMD_CODE_MASK) {
	59	case SCLP_CMDW_READ_SCP_INFO:
	60	case SCLP_CMDW_READ_SCP_INFO_FORCED:
	61	case SCLP_CMDW_READ_CPU_INFO:
	62	/*
	63	* An extended-length SCCB is only allowed for Read SCP/CPU Info and
	64	* is allowed to exceed the 4k boundary. The respective commands will
	65	* set the length field to the required length if an insufficient
	66	* SCCB length is provided.
	67	*/
	68	if (s390_has_feat(S390_FEAT_EXTENDED_LENGTH_SCCB)) {
	69	return true;
	70	}
	71	/* fallthrough */
	72	default:
	73	if (sccb_max_addr < sccb_boundary) {
	74	return true;
	75	}
db13387c CW	76	}
	77
	78	return false;
	79	}
	80
912d70d2	81	static void prepare_cpu_entries(MachineState ms, CPUEntry entry, int *count)
026546e6	82	{
4dd4200e	83	uint8_t features[SCCB_CPU_FEATURE_LEN] = { 0 };
026546e6 DH	84	int i;
026546e6 DH	85
4dd4200e	86	s390_get_feat_block(S390_FEAT_TYPE_SCLP_CPU, features);
bb535bb6 DH	87	for (i = 0, *count = 0; i < ms->possible_cpus->len; i++) {
	88	if (!ms->possible_cpus->cpus[i].cpu) {
	89	continue;
	90	}
	91	entry[*count].address = ms->possible_cpus->cpus[i].arch_id;
	92	entry[*count].type = 0;
	93	memcpy(entry[*count].features, features, sizeof(features));
	94	(*count)++;
026546e6 DH	95	}
	96	}
	97
0260b978 CW	98	#define SCCB_REQ_LEN(s, max_cpus) (sizeof(s) + max_cpus * sizeof(CPUEntry))
0260b978 CW	99
1ecd6078 CW	100	static inline bool ext_len_sccb_supported(SCCBHeader header)
	101	{
	102	return s390_has_feat(S390_FEAT_EXTENDED_LENGTH_SCCB) &&
	103	header.control_mask[2] & SCLP_VARIABLE_LENGTH_RESPONSE;
	104	}
	105
f6c98f92	106	/* Provide information about the configuration, CPUs and storage */
25a3c5af	107	static void read_SCP_info(SCLPDevice sclp, SCCB sccb)
f6c98f92 HG	108	{
f6c98f92 HG	109	ReadInfo read_info = (ReadInfo ) sccb;
311467f7	110	MachineState *machine = MACHINE(qdev_get_machine());
bb535bb6	111	int cpu_count;
1def6656	112	int rnsize, rnmax;
b038411d	113	IplParameterBlock *ipib = s390_ipl_get_iplb();
0260b978	114	int required_len = SCCB_REQ_LEN(ReadInfo, machine->possible_cpus->len);
1ecd6078 CW	115	int offset_cpu = s390_has_feat(S390_FEAT_EXTENDED_LENGTH_SCCB) ?
	116	offsetof(ReadInfo, entries) :
	117	SCLP_READ_SCP_INFO_FIXED_CPU_OFFSET;
1a7a5688	118	CPUEntry entries_start = (void )sccb + offset_cpu;
0260b978 CW	119
0260b978 CW	120	if (be16_to_cpu(sccb->h.length) < required_len) {
1ecd6078 CW	121	if (ext_len_sccb_supported(sccb->h)) {
	122	sccb->h.length = cpu_to_be16(required_len);
	123	}
0260b978 CW	124	sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
	125	return;
	126	}
8cc3aecf	127
8cc3aecf	128	/* CPU information */
1a7a5688	129	prepare_cpu_entries(machine, entries_start, &cpu_count);
8cc3aecf	130	read_info->entries_cpu = cpu_to_be16(cpu_count);
1a7a5688	131	read_info->offset_cpu = cpu_to_be16(offset_cpu);
ae71ed86	132	read_info->highest_cpu = cpu_to_be16(machine->smp.max_cpus - 1);
8cc3aecf	133
059be520 DH	134	read_info->ibc_val = cpu_to_be32(s390_get_ibc_val());
059be520 DH	135
4dd4200e DH	136	/* Configuration Characteristic (Extension) */
	137	s390_get_feat_block(S390_FEAT_TYPE_SCLP_CONF_CHAR,
	138	read_info->conf_char);
	139	s390_get_feat_block(S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT,
	140	read_info->conf_char_ext);
	141
8cba80c3	142	read_info->facilities = cpu_to_be64(SCLP_HAS_CPU_INFO \|
80b7a265	143	SCLP_HAS_IOA_RECONFIG);
f6c98f92	144
3fad3252	145	read_info->mha_pow = s390_get_mha_pow();
a3669307	146	read_info->hmfai = cpu_to_be32(s390_get_hmfai());
1def6656	147
71a2fd35	148	rnsize = 1 << (sclp->increment_size - 20);
1def6656 MR	149	if (rnsize <= 128) {
	150	read_info->rnsize = rnsize;
	151	} else {
	152	read_info->rnsize = 0;
	153	read_info->rnsize2 = cpu_to_be32(rnsize);
	154	}
	155
82fab5c5 DH	156	/* we don't support standby memory, maxram_size is never exposed */
82fab5c5 DH	157	rnmax = machine->ram_size >> sclp->increment_size;
1def6656 MR	158	if (rnmax < 0x10000) {
	159	read_info->rnmax = cpu_to_be16(rnmax);
	160	} else {
	161	read_info->rnmax = cpu_to_be16(0);
	162	read_info->rnmax2 = cpu_to_be64(rnmax);
	163	}
	164
b038411d FA	165	if (ipib && ipib->flags & DIAG308_FLAGS_LP_VALID) {
	166	memcpy(&read_info->loadparm, &ipib->loadparm,
	167	sizeof(read_info->loadparm));
	168	} else {
	169	s390_ipl_set_loadparm(read_info->loadparm);
	170	}
	171
1def6656 MR	172	sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
	173	}
	174
8cc3aecf	175	/* Provide information about the CPU */
25a3c5af	176	static void sclp_read_cpu_info(SCLPDevice sclp, SCCB sccb)
8cc3aecf	177	{
912d70d2	178	MachineState *machine = MACHINE(qdev_get_machine());
8cc3aecf	179	ReadCpuInfo cpu_info = (ReadCpuInfo ) sccb;
bb535bb6	180	int cpu_count;
0260b978 CW	181	int required_len = SCCB_REQ_LEN(ReadCpuInfo, machine->possible_cpus->len);
	182
	183	if (be16_to_cpu(sccb->h.length) < required_len) {
1ecd6078 CW	184	if (ext_len_sccb_supported(sccb->h)) {
	185	sccb->h.length = cpu_to_be16(required_len);
	186	}
0260b978 CW	187	sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
	188	return;
	189	}
8cc3aecf	190
912d70d2	191	prepare_cpu_entries(machine, cpu_info->entries, &cpu_count);
8cc3aecf JH	192	cpu_info->nr_configured = cpu_to_be16(cpu_count);
	193	cpu_info->offset_configured = cpu_to_be16(offsetof(ReadCpuInfo, entries));
	194	cpu_info->nr_standby = cpu_to_be16(0);
	195
	196	/* The standby offset is 16-byte for each CPU */
	197	cpu_info->offset_standby = cpu_to_be16(cpu_info->offset_configured
	198	+ cpu_info->nr_configured*sizeof(CPUEntry));
	199
8cc3aecf JH	200
	201	sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
	202	}
	203
80b7a265 CH	204	static void sclp_configure_io_adapter(SCLPDevice sclp, SCCB sccb,
	205	bool configure)
	206	{
	207	int rc;
	208
	209	if (be16_to_cpu(sccb->h.length) < 16) {
	210	rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
	211	goto out_err;
	212	}
	213
	214	switch (((IoaCfgSccb *)sccb)->atype) {
	215	case SCLP_RECONFIG_PCI_ATYPE:
	216	if (s390_has_feat(S390_FEAT_ZPCI)) {
	217	if (configure) {
	218	s390_pci_sclp_configure(sccb);
	219	} else {
	220	s390_pci_sclp_deconfigure(sccb);
	221	}
	222	return;
	223	}
	224	/* fallthrough */
	225	default:
	226	rc = SCLP_RC_ADAPTER_TYPE_NOT_RECOGNIZED;
	227	}
	228
	229	out_err:
	230	sccb->h.response_code = cpu_to_be16(rc);
	231	}
	232
25a3c5af	233	static void sclp_execute(SCLPDevice sclp, SCCB sccb, uint32_t code)
f6c98f92	234	{
25a3c5af DH	235	SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
25a3c5af DH	236	SCLPEventFacility *ef = sclp->event_facility;
477a72a1	237	SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
559a17a1	238
5f04c14a	239	switch (code & SCLP_CMD_CODE_MASK) {
f6c98f92 HG	240	case SCLP_CMDW_READ_SCP_INFO:
f6c98f92 HG	241	case SCLP_CMDW_READ_SCP_INFO_FORCED:
25a3c5af	242	sclp_c->read_SCP_info(sclp, sccb);
f6c98f92	243	break;
8cc3aecf	244	case SCLP_CMDW_READ_CPU_INFO:
25a3c5af	245	sclp_c->read_cpu_info(sclp, sccb);
8cc3aecf	246	break;
80b7a265 CH	247	case SCLP_CMDW_CONFIGURE_IOA:
80b7a265 CH	248	sclp_configure_io_adapter(sclp, sccb, true);
8cba80c3	249	break;
80b7a265 CH	250	case SCLP_CMDW_DECONFIGURE_IOA:
80b7a265 CH	251	sclp_configure_io_adapter(sclp, sccb, false);
8cba80c3	252	break;
f6c98f92	253	default:
477a72a1	254	efc->command_handler(ef, sccb, code);
f6c98f92 HG	255	break;
	256	}
	257	}
	258
0f73c5b3 JF	259	/*
	260	* We only need the address to have something valid for the
	261	* service_interrupt call.
	262	*/
	263	#define SCLP_PV_DUMMY_ADDR 0x4000
	264	int sclp_service_call_protected(CPUS390XState *env, uint64_t sccb,
	265	uint32_t code)
	266	{
	267	SCLPDevice *sclp = get_sclp_device();
	268	SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
c1db53a5 CW	269	SCCBHeader header;
c1db53a5 CW	270	g_autofree SCCB *work_sccb = NULL;
0f73c5b3	271
c1db53a5 CW	272	s390_cpu_pv_mem_read(env_archcpu(env), 0, &header, sizeof(SCCBHeader));
	273
	274	work_sccb = g_malloc0(be16_to_cpu(header.length));
	275	s390_cpu_pv_mem_read(env_archcpu(env), 0, work_sccb,
	276	be16_to_cpu(header.length));
0f73c5b3 JF	277
0f73c5b3 JF	278	if (!sclp_command_code_valid(code)) {
c1db53a5	279	work_sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
0f73c5b3 JF	280	goto out_write;
	281	}
	282
1ecd6078	283	if (!sccb_verify_boundary(sccb, be16_to_cpu(work_sccb->h.length), code)) {
c1db53a5	284	work_sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
db13387c CW	285	goto out_write;
	286	}
	287
c1db53a5	288	sclp_c->execute(sclp, work_sccb, code);
0f73c5b3	289	out_write:
c1db53a5 CW	290	s390_cpu_pv_mem_write(env_archcpu(env), 0, work_sccb,
c1db53a5 CW	291	be16_to_cpu(work_sccb->h.length));
0f73c5b3 JF	292	sclp_c->service_interrupt(sclp, SCLP_PV_DUMMY_ADDR);
	293	return 0;
	294	}
	295
6e252802	296	int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
f6c98f92	297	{
25a3c5af DH	298	SCLPDevice *sclp = get_sclp_device();
25a3c5af DH	299	SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
c1db53a5 CW	300	SCCBHeader header;
c1db53a5 CW	301	g_autofree SCCB *work_sccb = NULL;
f6c98f92 HG	302
f6c98f92 HG	303	/* first some basic checks on program checks */
6e252802	304	if (env->psw.mask & PSW_MASK_PSTATE) {
e6de76fc	305	return -PGM_PRIVILEGED;
6e252802	306	}
f6c98f92	307	if (cpu_physical_memory_is_io(sccb)) {
e6de76fc	308	return -PGM_ADDRESSING;
f6c98f92	309	}
6e252802 TH	310	if ((sccb & ~0x1fffUL) == 0 \|\| (sccb & ~0x1fffUL) == env->psa
6e252802 TH	311	\|\| (sccb & ~0x7ffffff8UL) != 0) {
e6de76fc	312	return -PGM_SPECIFICATION;
f6c98f92 HG	313	}
f6c98f92 HG	314
c1db53a5 CW	315	/* the header contains the actual length of the sccb */
	316	cpu_physical_memory_read(sccb, &header, sizeof(SCCBHeader));
	317
	318	/* Valid sccb sizes */
	319	if (be16_to_cpu(header.length) < sizeof(SCCBHeader)) {
	320	return -PGM_SPECIFICATION;
	321	}
	322
f6c98f92 HG	323	/*
	324	* we want to work on a private copy of the sccb, to prevent guests
	325	* from playing dirty tricks by modifying the memory content after
	326	* the host has checked the values
	327	*/
c1db53a5 CW	328	work_sccb = g_malloc0(be16_to_cpu(header.length));
c1db53a5 CW	329	cpu_physical_memory_read(sccb, work_sccb, be16_to_cpu(header.length));
f6c98f92	330
0f73c5b3	331	if (!sclp_command_code_valid(code)) {
c1db53a5	332	work_sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
679b8447 JF	333	goto out_write;
679b8447 JF	334	}
f6c98f92	335
1ecd6078	336	if (!sccb_verify_boundary(sccb, be16_to_cpu(work_sccb->h.length), code)) {
c1db53a5	337	work_sccb->h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION);
6f6c9333 JF	338	goto out_write;
	339	}
	340
c1db53a5	341	sclp_c->execute(sclp, work_sccb, code);
679b8447	342	out_write:
c1db53a5 CW	343	cpu_physical_memory_write(sccb, work_sccb,
c1db53a5 CW	344	be16_to_cpu(work_sccb->h.length));
f6c98f92	345
1723a1b6	346	sclp_c->service_interrupt(sclp, sccb);
f6c98f92	347
e6de76fc	348	return 0;
f6c98f92 HG	349	}
f6c98f92 HG	350
1723a1b6	351	static void service_interrupt(SCLPDevice *sclp, uint32_t sccb)
f6c98f92	352	{
1723a1b6	353	SCLPEventFacility *ef = sclp->event_facility;
477a72a1 HG	354	SCLPEventFacilityClass *efc = EVENT_FACILITY_GET_CLASS(ef);
477a72a1 HG	355
559a17a1 HG	356	uint32_t param = sccb & ~3;
	357
	358	/* Indicate whether an event is still pending */
477a72a1	359	param \|= efc->event_pending(ef) ? 1 : 0;
559a17a1 HG	360
	361	if (!param) {
	362	/* No need to send an interrupt, there's nothing to be notified about */
	363	return;
	364	}
	365	s390_sclp_extint(param);
f6c98f92 HG	366	}
f6c98f92 HG	367
1723a1b6 DH	368	void sclp_service_interrupt(uint32_t sccb)
	369	{
	370	SCLPDevice *sclp = get_sclp_device();
	371	SCLPDeviceClass *sclp_c = SCLP_GET_CLASS(sclp);
	372
	373	sclp_c->service_interrupt(sclp, sccb);
	374	}
	375
f6c98f92 HG	376	/* qemu object creation and initialization functions */
f6c98f92 HG	377
559a17a1 HG	378	void s390_sclp_init(void)
559a17a1 HG	379	{
515190d9	380	Object *new = object_new(TYPE_SCLP);
559a17a1	381
d2623129	382	object_property_add_child(qdev_get_machine(), TYPE_SCLP, new);
688ffbb4	383	object_unref(new);
ce189ab2	384	qdev_realize(DEVICE(new), NULL, &error_fatal);
559a17a1	385	}
0844df77	386
515190d9 DH	387	static void sclp_realize(DeviceState dev, Error *errp)
515190d9 DH	388	{
1cf065fb	389	MachineState *machine = MACHINE(qdev_get_machine());
515190d9	390	SCLPDevice *sclp = SCLP(dev);
1cf065fb DH	391	uint64_t hw_limit;
1cf065fb DH	392	int ret;
515190d9	393
8b638c43 DH	394	/*
	395	* qdev_device_add searches the sysbus for TYPE_SCLP_EVENTS_BUS. As long
	396	* as we can't find a fitting bus via the qom tree, we have to add the
	397	* event facility to the sysbus, so e.g. a sclp console can be created.
	398	*/
992861fb MA	399	if (!sysbus_realize(SYS_BUS_DEVICE(sclp->event_facility), errp)) {
992861fb MA	400	return;
68424112	401	}
1cf065fb DH	402
	403	ret = s390_set_memory_limit(machine->maxram_size, &hw_limit);
	404	if (ret == -E2BIG) {
992861fb	405	error_setg(errp, "host supports a maximum of %" PRIu64 " GB",
393fc4c7	406	hw_limit / GiB);
1cf065fb	407	} else if (ret) {
992861fb	408	error_setg(errp, "setting the guest size failed");
1cf065fb	409	}
515190d9 DH	410	}
515190d9 DH	411
1cf065fb DH	412	static void sclp_memory_init(SCLPDevice *sclp)
	413	{
	414	MachineState *machine = MACHINE(qdev_get_machine());
5c30ef93	415	MachineClass *machine_class = MACHINE_GET_CLASS(qdev_get_machine());
1cf065fb	416	ram_addr_t initial_mem = machine->ram_size;
1cf065fb DH	417	int increment_size = 20;
	418
	419	/* The storage increment size is a multiple of 1M and is a power of 2.
5c30ef93 CB	420	* For some machine types, the number of storage increments must be
5c30ef93 CB	421	* MAX_STORAGE_INCREMENTS or fewer.
1cf065fb DH	422	* The variable 'increment_size' is an exponent of 2 that can be
1cf065fb DH	423	* used to calculate the size (in bytes) of an increment. */
5c30ef93 CB	424	while (machine_class->fixup_ram_size != NULL &&
5c30ef93 CB	425	(initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
1cf065fb DH	426	increment_size++;
1cf065fb DH	427	}
71a2fd35	428	sclp->increment_size = increment_size;
1cf065fb DH	429	}
1cf065fb DH	430
515190d9 DH	431	static void sclp_init(Object *obj)
	432	{
	433	SCLPDevice *sclp = SCLP(obj);
	434	Object *new;
	435
	436	new = object_new(TYPE_SCLP_EVENT_FACILITY);
d2623129	437	object_property_add_child(obj, TYPE_SCLP_EVENT_FACILITY, new);
515190d9 DH	438	object_unref(new);
515190d9 DH	439	sclp->event_facility = EVENT_FACILITY(new);
1cf065fb DH	440
1cf065fb DH	441	sclp_memory_init(sclp);
515190d9 DH	442	}
	443
	444	static void sclp_class_init(ObjectClass oc, void data)
	445	{
25a3c5af	446	SCLPDeviceClass *sc = SCLP_CLASS(oc);
515190d9 DH	447	DeviceClass *dc = DEVICE_CLASS(oc);
	448
	449	dc->desc = "SCLP (Service-Call Logical Processor)";
	450	dc->realize = sclp_realize;
	451	dc->hotpluggable = false;
	452	set_bit(DEVICE_CATEGORY_MISC, dc->categories);
e6cb60bf TH	453	/*
	454	* Reason: Creates TYPE_SCLP_EVENT_FACILITY in sclp_init
	455	* which is a non-pluggable sysbus device
	456	*/
	457	dc->user_creatable = false;
25a3c5af DH	458
25a3c5af DH	459	sc->read_SCP_info = read_SCP_info;
25a3c5af DH	460	sc->read_cpu_info = sclp_read_cpu_info;
25a3c5af DH	461	sc->execute = sclp_execute;
1723a1b6	462	sc->service_interrupt = service_interrupt;
515190d9 DH	463	}
	464
	465	static TypeInfo sclp_info = {
	466	.name = TYPE_SCLP,
	467	.parent = TYPE_DEVICE,
	468	.instance_init = sclp_init,
	469	.instance_size = sizeof(SCLPDevice),
	470	.class_init = sclp_class_init,
	471	.class_size = sizeof(SCLPDeviceClass),
	472	};
	473
0844df77 MR	474	static void register_types(void)
0844df77 MR	475	{
515190d9	476	type_register_static(&sclp_info);
0844df77 MR	477	}
0844df77 MR	478	type_init(register_types);