[qemu.git] / target-s390x / kvm.c

/*
 * QEMU S390x KVM implementation
 *
 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/mman.h>

#include <linux/kvm.h>
#include <asm/ptrace.h>

#include "qemu-common.h"
#include "qemu-timer.h"
#include "sysemu.h"
#include "kvm.h"
#include "cpu.h"
#include "device_tree.h"

/* #define DEBUG_KVM */

#ifdef DEBUG_KVM
#define dprintf(fmt, ...) \
    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define dprintf(fmt, ...) \
    do { } while (0)
#endif

#define IPA0_DIAG                       0x8300
#define IPA0_SIGP                       0xae00
#define IPA0_PRIV                       0xb200

#define PRIV_SCLP_CALL                  0x20
#define DIAG_KVM_HYPERCALL              0x500
#define DIAG_KVM_BREAKPOINT             0x501

#define SCP_LENGTH                      0x00
#define SCP_FUNCTION_CODE               0x02
#define SCP_CONTROL_MASK                0x03
#define SCP_RESPONSE_CODE               0x06
#define SCP_MEM_CODE                    0x08
#define SCP_INCREMENT                   0x0a

#define ICPT_INSTRUCTION                0x04
#define ICPT_WAITPSW                    0x1c
#define ICPT_SOFT_INTERCEPT             0x24
#define ICPT_CPU_STOP                   0x28
#define ICPT_IO                         0x40

#define SIGP_RESTART                    0x06
#define SIGP_INITIAL_CPU_RESET          0x0b
#define SIGP_STORE_STATUS_ADDR          0x0e
#define SIGP_SET_ARCH                   0x12

#define SCLP_CMDW_READ_SCP_INFO         0x00020001
#define SCLP_CMDW_READ_SCP_INFO_FORCED  0x00120001

const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
    KVM_CAP_LAST_INFO
};

int kvm_arch_init(KVMState *s)
{
    return 0;
}

int kvm_arch_init_vcpu(CPUState *env)
{
    int ret = 0;

    if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
        perror("cannot init reset vcpu");
    }

    return ret;
}

void kvm_arch_reset_vcpu(CPUState *env)
{
    /* FIXME: add code to reset vcpu. */
}

int kvm_arch_put_registers(CPUState *env, int level)
{
    struct kvm_regs regs;
    int ret;
    int i;

    ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
    if (ret < 0) {
        return ret;
    }

    for (i = 0; i < 16; i++) {
        regs.gprs[i] = env->regs[i];
    }

    ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, &regs);
    if (ret < 0) {
        return ret;
    }

    env->kvm_run->psw_addr = env->psw.addr;
    env->kvm_run->psw_mask = env->psw.mask;

    return ret;
}

int kvm_arch_get_registers(CPUState *env)
{
    int ret;
    struct kvm_regs regs;
    int i;

    ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
    if (ret < 0) {
        return ret;
    }

    for (i = 0; i < 16; i++) {
        env->regs[i] = regs.gprs[i];
    }

    env->psw.addr = env->kvm_run->psw_addr;
    env->psw.mask = env->kvm_run->psw_mask;

    return 0;
}

int kvm_arch_insert_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp)
{
    static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};

    if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) ||
        cpu_memory_rw_debug(env, bp->pc, (uint8_t *)diag_501, 4, 1)) {
        return -EINVAL;
    }
    return 0;
}

int kvm_arch_remove_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp)
{
    uint8_t t[4];
    static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};

    if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) {
        return -EINVAL;
    } else if (memcmp(t, diag_501, 4)) {
        return -EINVAL;
    } else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) {
        return -EINVAL;
    }

    return 0;
}

void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
}

void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
}

int kvm_arch_process_async_events(CPUState *env)
{
    return 0;
}

static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
                                        uint64_t parm64, int vm)
{
    struct kvm_s390_interrupt kvmint;
    int r;

    if (!env->kvm_state) {
        return;
    }

    env->halted = 0;
    env->exception_index = -1;
    qemu_cpu_kick(env);

    kvmint.type = type;
    kvmint.parm = parm;
    kvmint.parm64 = parm64;

    if (vm) {
        r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
    } else {
        r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
    }

    if (r < 0) {
        fprintf(stderr, "KVM failed to inject interrupt\n");
        exit(1);
    }
}

void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token)
{
    kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
                                token, 1);
}

static void kvm_s390_interrupt(CPUState *env, int type, uint32_t code)
{
    kvm_s390_interrupt_internal(env, type, code, 0, 0);
}

static void enter_pgmcheck(CPUState *env, uint16_t code)
{
    kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
}

static void setcc(CPUState *env, uint64_t cc)
{
    env->kvm_run->psw_mask &= ~(3ul << 44);
    env->kvm_run->psw_mask |= (cc & 3) << 44;

    env->psw.mask &= ~(3ul << 44);
    env->psw.mask |= (cc & 3) << 44;
}

static int sclp_service_call(CPUState *env, struct kvm_run *run, uint16_t ipbh0)
{
    uint32_t sccb;
    uint64_t code;
    int r = 0;

    cpu_synchronize_state(env);
    sccb = env->regs[ipbh0 & 0xf];
    code = env->regs[(ipbh0 & 0xf0) >> 4];

    dprintf("sclp(0x%x, 0x%lx)\n", sccb, code);

    if (sccb & ~0x7ffffff8ul) {
        fprintf(stderr, "KVM: invalid sccb address 0x%x\n", sccb);
        r = -1;
        goto out;
    }

    switch(code) {
        case SCLP_CMDW_READ_SCP_INFO:
        case SCLP_CMDW_READ_SCP_INFO_FORCED:
            stw_phys(sccb + SCP_MEM_CODE, ram_size >> 20);
            stb_phys(sccb + SCP_INCREMENT, 1);
            stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
            setcc(env, 0);

            kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE,
                                        sccb & ~3, 0, 1);
            break;
        default:
            dprintf("KVM: invalid sclp call 0x%x / 0x%lx\n", sccb, code);
            r = -1;
            break;
    }

out:
    if (r < 0) {
        setcc(env, 3);
    }
    return 0;
}

static int handle_priv(CPUState *env, struct kvm_run *run, uint8_t ipa1)
{
    int r = 0;
    uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;

    dprintf("KVM: PRIV: %d\n", ipa1);
    switch (ipa1) {
        case PRIV_SCLP_CALL:
            r = sclp_service_call(env, run, ipbh0);
            break;
        default:
            dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
            r = -1;
            break;
    }

    return r;
}

static int handle_hypercall(CPUState *env, struct kvm_run *run)
{
    int r;

    cpu_synchronize_state(env);
    r = s390_virtio_hypercall(env);

    return r;
}

static int handle_diag(CPUState *env, struct kvm_run *run, int ipb_code)
{
    int r = 0;

    switch (ipb_code) {
        case DIAG_KVM_HYPERCALL:
            r = handle_hypercall(env, run);
            break;
        case DIAG_KVM_BREAKPOINT:
            sleep(10);
            break;
        default:
            dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
            r = -1;
            break;
    }

    return r;
}

static int s390_cpu_restart(CPUState *env)
{
    kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
    env->halted = 0;
    env->exception_index = -1;
    qemu_cpu_kick(env);
    dprintf("DONE: SIGP cpu restart: %p\n", env);
    return 0;
}

static int s390_store_status(CPUState *env, uint32_t parameter)
{
    /* XXX */
    fprintf(stderr, "XXX SIGP store status\n");
    return -1;
}

static int s390_cpu_initial_reset(CPUState *env)
{
    int i;

    if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
        perror("cannot init reset vcpu");
    }

    /* Manually zero out all registers */
    cpu_synchronize_state(env);
    for (i = 0; i < 16; i++) {
        env->regs[i] = 0;
    }

    dprintf("DONE: SIGP initial reset: %p\n", env);
    return 0;
}

static int handle_sigp(CPUState *env, struct kvm_run *run, uint8_t ipa1)
{
    uint8_t order_code;
    uint32_t parameter;
    uint16_t cpu_addr;
    uint8_t t;
    int r = -1;
    CPUState *target_env;

    cpu_synchronize_state(env);

    /* get order code */
    order_code = run->s390_sieic.ipb >> 28;
    if (order_code > 0) {
        order_code = env->regs[order_code];
    }
    order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;

    /* get parameters */
    t = (ipa1 & 0xf0) >> 4;
    if (!(t % 2)) {
        t++;
    }

    parameter = env->regs[t] & 0x7ffffe00;
    cpu_addr = env->regs[ipa1 & 0x0f];

    target_env = s390_cpu_addr2state(cpu_addr);
    if (!target_env) {
        goto out;
    }

    switch (order_code) {
        case SIGP_RESTART:
            r = s390_cpu_restart(target_env);
            break;
        case SIGP_STORE_STATUS_ADDR:
            r = s390_store_status(target_env, parameter);
            break;
        case SIGP_SET_ARCH:
            /* make the caller panic */
            return -1;
        case SIGP_INITIAL_CPU_RESET:
            r = s390_cpu_initial_reset(target_env);
            break;
        default:
            fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", ipa1);
            break;
    }

out:
    setcc(env, r ? 3 : 0);
    return 0;
}

static int handle_instruction(CPUState *env, struct kvm_run *run)
{
    unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
    uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
    int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16;
    int r = -1;

    dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
    switch (ipa0) {
        case IPA0_PRIV:
            r = handle_priv(env, run, ipa1);
            break;
        case IPA0_DIAG:
            r = handle_diag(env, run, ipb_code);
            break;
        case IPA0_SIGP:
            r = handle_sigp(env, run, ipa1);
            break;
    }

    if (r < 0) {
        enter_pgmcheck(env, 0x0001);
    }
    return r;
}

static int handle_intercept(CPUState *env)
{
    struct kvm_run *run = env->kvm_run;
    int icpt_code = run->s390_sieic.icptcode;
    int r = 0;

    dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code, env->kvm_run->psw_addr);
    switch (icpt_code) {
        case ICPT_INSTRUCTION:
            r = handle_instruction(env, run);
            break;
        case ICPT_WAITPSW:
            /* XXX What to do on system shutdown? */
            env->halted = 1;
            env->exception_index = EXCP_HLT;
            break;
        case ICPT_SOFT_INTERCEPT:
            fprintf(stderr, "KVM unimplemented icpt SOFT\n");
            exit(1);
            break;
        case ICPT_CPU_STOP:
            qemu_system_shutdown_request();
            break;
        case ICPT_IO:
            fprintf(stderr, "KVM unimplemented icpt IO\n");
            exit(1);
            break;
        default:
            fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
            exit(1);
            break;
    }

    return r;
}

int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run)
{
    int ret = 0;

    switch (run->exit_reason) {
        case KVM_EXIT_S390_SIEIC:
            ret = handle_intercept(env);
            break;
        case KVM_EXIT_S390_RESET:
            fprintf(stderr, "RESET not implemented\n");
            exit(1);
            break;
        default:
            fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
            break;
    }

    if (ret == 0) {
        ret = EXCP_INTERRUPT;
    } else if (ret > 0) {
        ret = 0;
    }
    return ret;
}

bool kvm_arch_stop_on_emulation_error(CPUState *env)
{
    return true;
}

int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
{
    return 1;
}

int kvm_arch_on_sigbus(int code, void *addr)
{
    return 1;
}
Commit	Line	Data
0e60a699 AG	1	/*
	2	* QEMU S390x KVM implementation
	3	*
	4	* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <sys/types.h>
	21	#include <sys/ioctl.h>
	22	#include <sys/mman.h>
	23
	24	#include <linux/kvm.h>
	25	#include <asm/ptrace.h>
	26
	27	#include "qemu-common.h"
	28	#include "qemu-timer.h"
	29	#include "sysemu.h"
	30	#include "kvm.h"
	31	#include "cpu.h"
	32	#include "device_tree.h"
	33
	34	/* #define DEBUG_KVM */
	35
	36	#ifdef DEBUG_KVM
	37	#define dprintf(fmt, ...) \
	38	do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
	39	#else
	40	#define dprintf(fmt, ...) \
	41	do { } while (0)
	42	#endif
	43
	44	#define IPA0_DIAG 0x8300
	45	#define IPA0_SIGP 0xae00
	46	#define IPA0_PRIV 0xb200
	47
	48	#define PRIV_SCLP_CALL 0x20
	49	#define DIAG_KVM_HYPERCALL 0x500
	50	#define DIAG_KVM_BREAKPOINT 0x501
	51
	52	#define SCP_LENGTH 0x00
	53	#define SCP_FUNCTION_CODE 0x02
	54	#define SCP_CONTROL_MASK 0x03
	55	#define SCP_RESPONSE_CODE 0x06
	56	#define SCP_MEM_CODE 0x08
	57	#define SCP_INCREMENT 0x0a
	58
	59	#define ICPT_INSTRUCTION 0x04
	60	#define ICPT_WAITPSW 0x1c
	61	#define ICPT_SOFT_INTERCEPT 0x24
	62	#define ICPT_CPU_STOP 0x28
	63	#define ICPT_IO 0x40
	64
65	#define SIGP_RESTART 0x06
66	#define SIGP_INITIAL_CPU_RESET 0x0b
67	#define SIGP_STORE_STATUS_ADDR 0x0e
68	#define SIGP_SET_ARCH 0x12
69
70	#define SCLP_CMDW_READ_SCP_INFO 0x00020001
71	#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
72
94a8d39a JK	73	const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
	74	KVM_CAP_LAST_INFO
	75	};
	76
cad1e282	77	int kvm_arch_init(KVMState *s)
0e60a699 AG	78	{
	79	return 0;
	80	}
	81
	82	int kvm_arch_init_vcpu(CPUState *env)
	83	{
	84	int ret = 0;
	85
	86	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
	87	perror("cannot init reset vcpu");
	88	}
	89
	90	return ret;
	91	}
	92
	93	void kvm_arch_reset_vcpu(CPUState *env)
	94	{
	95	/* FIXME: add code to reset vcpu. */
	96	}
	97
ea375f9a	98	int kvm_arch_put_registers(CPUState *env, int level)
0e60a699 AG	99	{
	100	struct kvm_regs regs;
	101	int ret;
	102	int i;
	103
	104	ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
	105	if (ret < 0) {
	106	return ret;
	107	}
	108
	109	for (i = 0; i < 16; i++) {
	110	regs.gprs[i] = env->regs[i];
	111	}
	112
	113	ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, &regs);
	114	if (ret < 0) {
	115	return ret;
	116	}
	117
	118	env->kvm_run->psw_addr = env->psw.addr;
	119	env->kvm_run->psw_mask = env->psw.mask;
	120
	121	return ret;
	122	}
	123
	124	int kvm_arch_get_registers(CPUState *env)
	125	{
6c33286a	126	int ret;
0e60a699 AG	127	struct kvm_regs regs;
	128	int i;
	129
	130	ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
	131	if (ret < 0) {
	132	return ret;
	133	}
	134
	135	for (i = 0; i < 16; i++) {
	136	env->regs[i] = regs.gprs[i];
	137	}
	138
	139	env->psw.addr = env->kvm_run->psw_addr;
	140	env->psw.mask = env->kvm_run->psw_mask;
	141
	142	return 0;
	143	}
	144
	145	int kvm_arch_insert_sw_breakpoint(CPUState env, struct kvm_sw_breakpoint bp)
	146	{
	147	static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
	148
	149	if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) \|\|
	150	cpu_memory_rw_debug(env, bp->pc, (uint8_t *)diag_501, 4, 1)) {
	151	return -EINVAL;
	152	}
	153	return 0;
	154	}
	155
	156	int kvm_arch_remove_sw_breakpoint(CPUState env, struct kvm_sw_breakpoint bp)
	157	{
	158	uint8_t t[4];
	159	static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
	160
	161	if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) {
	162	return -EINVAL;
	163	} else if (memcmp(t, diag_501, 4)) {
	164	return -EINVAL;
	165	} else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) {
	166	return -EINVAL;
	167	}
	168
	169	return 0;
	170	}
	171
7a39fe58	172	void kvm_arch_pre_run(CPUState env, struct kvm_run run)
0e60a699	173	{
0e60a699 AG	174	}
0e60a699 AG	175
7a39fe58	176	void kvm_arch_post_run(CPUState env, struct kvm_run run)
0e60a699	177	{
0e60a699 AG	178	}
0e60a699 AG	179
99036865	180	int kvm_arch_process_async_events(CPUState *env)
0af691d7 MT	181	{
	182	return 0;
	183	}
	184
0e60a699 AG	185	static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
	186	uint64_t parm64, int vm)
	187	{
	188	struct kvm_s390_interrupt kvmint;
	189	int r;
	190
	191	if (!env->kvm_state) {
	192	return;
	193	}
	194
	195	env->halted = 0;
ee0dc6d3	196	env->exception_index = -1;
94ad5b00	197	qemu_cpu_kick(env);
0e60a699 AG	198
	199	kvmint.type = type;
	200	kvmint.parm = parm;
	201	kvmint.parm64 = parm64;
	202
	203	if (vm) {
	204	r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
	205	} else {
	206	r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
	207	}
	208
	209	if (r < 0) {
	210	fprintf(stderr, "KVM failed to inject interrupt\n");
	211	exit(1);
	212	}
	213	}
	214
	215	void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token)
	216	{
	217	kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
	218	token, 1);
	219	}
	220
	221	static void kvm_s390_interrupt(CPUState *env, int type, uint32_t code)
	222	{
	223	kvm_s390_interrupt_internal(env, type, code, 0, 0);
	224	}
	225
	226	static void enter_pgmcheck(CPUState *env, uint16_t code)
	227	{
	228	kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
	229	}
	230
	231	static void setcc(CPUState *env, uint64_t cc)
	232	{
	233	env->kvm_run->psw_mask &= ~(3ul << 44);
	234	env->kvm_run->psw_mask \|= (cc & 3) << 44;
	235
	236	env->psw.mask &= ~(3ul << 44);
	237	env->psw.mask \|= (cc & 3) << 44;
	238	}
	239
	240	static int sclp_service_call(CPUState env, struct kvm_run run, uint16_t ipbh0)
	241	{
	242	uint32_t sccb;
	243	uint64_t code;
	244	int r = 0;
	245
	246	cpu_synchronize_state(env);
	247	sccb = env->regs[ipbh0 & 0xf];
	248	code = env->regs[(ipbh0 & 0xf0) >> 4];
	249
	250	dprintf("sclp(0x%x, 0x%lx)\n", sccb, code);
	251
	252	if (sccb & ~0x7ffffff8ul) {
	253	fprintf(stderr, "KVM: invalid sccb address 0x%x\n", sccb);
	254	r = -1;
	255	goto out;
	256	}
	257
	258	switch(code) {
	259	case SCLP_CMDW_READ_SCP_INFO:
	260	case SCLP_CMDW_READ_SCP_INFO_FORCED:
	261	stw_phys(sccb + SCP_MEM_CODE, ram_size >> 20);
262	stb_phys(sccb + SCP_INCREMENT, 1);
263	stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
264	setcc(env, 0);
265
266	kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE,
267	sccb & ~3, 0, 1);
268	break;
269	default:
270	dprintf("KVM: invalid sclp call 0x%x / 0x%lx\n", sccb, code);
271	r = -1;
272	break;
273	}
274
275	out:
276	if (r < 0) {
277	setcc(env, 3);
278	}
279	return 0;
280	}
281
282	static int handle_priv(CPUState env, struct kvm_run run, uint8_t ipa1)
283	{
284	int r = 0;
285	uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
286
287	dprintf("KVM: PRIV: %d\n", ipa1);
288	switch (ipa1) {
289	case PRIV_SCLP_CALL:
290	r = sclp_service_call(env, run, ipbh0);
291	break;
292	default:
293	dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
294	r = -1;
295	break;
296	}
297
298	return r;
299	}
300
301	static int handle_hypercall(CPUState env, struct kvm_run run)
302	{
303	int r;
304
305	cpu_synchronize_state(env);
306	r = s390_virtio_hypercall(env);
0e60a699 AG	307
	308	return r;
	309	}
	310
	311	static int handle_diag(CPUState env, struct kvm_run run, int ipb_code)
	312	{
	313	int r = 0;
	314
	315	switch (ipb_code) {
	316	case DIAG_KVM_HYPERCALL:
	317	r = handle_hypercall(env, run);
	318	break;
	319	case DIAG_KVM_BREAKPOINT:
	320	sleep(10);
	321	break;
	322	default:
	323	dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
	324	r = -1;
	325	break;
	326	}
	327
	328	return r;
	329	}
	330
	331	static int s390_cpu_restart(CPUState *env)
	332	{
	333	kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
	334	env->halted = 0;
ee0dc6d3	335	env->exception_index = -1;
0e60a699 AG	336	qemu_cpu_kick(env);
	337	dprintf("DONE: SIGP cpu restart: %p\n", env);
	338	return 0;
	339	}
	340
	341	static int s390_store_status(CPUState *env, uint32_t parameter)
	342	{
	343	/* XXX */
	344	fprintf(stderr, "XXX SIGP store status\n");
	345	return -1;
	346	}
	347
	348	static int s390_cpu_initial_reset(CPUState *env)
	349	{
d5900813 AG	350	int i;
	351
	352	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
	353	perror("cannot init reset vcpu");
	354	}
	355
	356	/* Manually zero out all registers */
	357	cpu_synchronize_state(env);
	358	for (i = 0; i < 16; i++) {
	359	env->regs[i] = 0;
	360	}
	361
	362	dprintf("DONE: SIGP initial reset: %p\n", env);
	363	return 0;
0e60a699 AG	364	}
	365
	366	static int handle_sigp(CPUState env, struct kvm_run run, uint8_t ipa1)
	367	{
	368	uint8_t order_code;
	369	uint32_t parameter;
	370	uint16_t cpu_addr;
	371	uint8_t t;
	372	int r = -1;
	373	CPUState *target_env;
	374
	375	cpu_synchronize_state(env);
	376
	377	/* get order code */
	378	order_code = run->s390_sieic.ipb >> 28;
	379	if (order_code > 0) {
	380	order_code = env->regs[order_code];
	381	}
	382	order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;
	383
	384	/* get parameters */
	385	t = (ipa1 & 0xf0) >> 4;
	386	if (!(t % 2)) {
	387	t++;
	388	}
	389
	390	parameter = env->regs[t] & 0x7ffffe00;
	391	cpu_addr = env->regs[ipa1 & 0x0f];
	392
	393	target_env = s390_cpu_addr2state(cpu_addr);
	394	if (!target_env) {
	395	goto out;
	396	}
	397
	398	switch (order_code) {
	399	case SIGP_RESTART:
	400	r = s390_cpu_restart(target_env);
	401	break;
	402	case SIGP_STORE_STATUS_ADDR:
	403	r = s390_store_status(target_env, parameter);
	404	break;
	405	case SIGP_SET_ARCH:
	406	/* make the caller panic */
	407	return -1;
	408	case SIGP_INITIAL_CPU_RESET:
	409	r = s390_cpu_initial_reset(target_env);
	410	break;
	411	default:
	412	fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", ipa1);
	413	break;
	414	}
	415
	416	out:
	417	setcc(env, r ? 3 : 0);
	418	return 0;
	419	}
	420
	421	static int handle_instruction(CPUState env, struct kvm_run run)
	422	{
	423	unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
	424	uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
	425	int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16;
d7963c43	426	int r = -1;
0e60a699 AG	427
	428	dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
	429	switch (ipa0) {
	430	case IPA0_PRIV:
	431	r = handle_priv(env, run, ipa1);
	432	break;
	433	case IPA0_DIAG:
	434	r = handle_diag(env, run, ipb_code);
	435	break;
	436	case IPA0_SIGP:
	437	r = handle_sigp(env, run, ipa1);
	438	break;
	439	}
	440
	441	if (r < 0) {
	442	enter_pgmcheck(env, 0x0001);
	443	}
	444	return r;
	445	}
	446
	447	static int handle_intercept(CPUState *env)
	448	{
	449	struct kvm_run *run = env->kvm_run;
	450	int icpt_code = run->s390_sieic.icptcode;
	451	int r = 0;
	452
	453	dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code, env->kvm_run->psw_addr);
	454	switch (icpt_code) {
	455	case ICPT_INSTRUCTION:
	456	r = handle_instruction(env, run);
	457	break;
	458	case ICPT_WAITPSW:
	459	/* XXX What to do on system shutdown? */
	460	env->halted = 1;
	461	env->exception_index = EXCP_HLT;
	462	break;
	463	case ICPT_SOFT_INTERCEPT:
	464	fprintf(stderr, "KVM unimplemented icpt SOFT\n");
	465	exit(1);
	466	break;
	467	case ICPT_CPU_STOP:
	468	qemu_system_shutdown_request();
	469	break;
	470	case ICPT_IO:
	471	fprintf(stderr, "KVM unimplemented icpt IO\n");
	472	exit(1);
	473	break;
	474	default:
	475	fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
	476	exit(1);
	477	break;
	478	}
	479
	480	return r;
	481	}
	482
	483	int kvm_arch_handle_exit(CPUState env, struct kvm_run run)
	484	{
	485	int ret = 0;
	486
	487	switch (run->exit_reason) {
	488	case KVM_EXIT_S390_SIEIC:
	489	ret = handle_intercept(env);
	490	break;
491	case KVM_EXIT_S390_RESET:
492	fprintf(stderr, "RESET not implemented\n");
493	exit(1);
494	break;
495	default:
496	fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
497	break;
498	}
499
bb4ea393 JK	500	if (ret == 0) {
	501	ret = EXCP_INTERRUPT;
	502	} else if (ret > 0) {
	503	ret = 0;
	504	}
0e60a699 AG	505	return ret;
0e60a699 AG	506	}
4513d923 GN	507
	508	bool kvm_arch_stop_on_emulation_error(CPUState *env)
	509	{
	510	return true;
	511	}
a1b87fe0 JK	512
	513	int kvm_arch_on_sigbus_vcpu(CPUState env, int code, void addr)
	514	{
	515	return 1;
	516	}
	517
	518	int kvm_arch_on_sigbus(int code, void *addr)
	519	{
	520	return 1;
	521	}