[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

int kvm_arch_init(KVMState *s, int smp_cpus)
{
    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)
{
    uint32_t 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;
}

int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
    return 0;
}

int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
    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;

    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)
{
    /* XXX */
    fprintf(stderr, "XXX SIGP init\n");
    return -1;
}

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;
    }

    return ret;
}
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
73	int kvm_arch_init(KVMState *s, int smp_cpus)
74	{
75	return 0;
76	}
77
78	int kvm_arch_init_vcpu(CPUState *env)
79	{
80	int ret = 0;
81
82	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
83	perror("cannot init reset vcpu");
84	}
85
86	return ret;
87	}
88
89	void kvm_arch_reset_vcpu(CPUState *env)
90	{
91	/* FIXME: add code to reset vcpu. */
92	}
93
ea375f9a	94	int kvm_arch_put_registers(CPUState *env, int level)
0e60a699 AG	95	{
	96	struct kvm_regs regs;
	97	int ret;
	98	int i;
	99
	100	ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
	101	if (ret < 0) {
	102	return ret;
	103	}
	104
	105	for (i = 0; i < 16; i++) {
	106	regs.gprs[i] = env->regs[i];
	107	}
	108
	109	ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, &regs);
	110	if (ret < 0) {
	111	return ret;
	112	}
	113
	114	env->kvm_run->psw_addr = env->psw.addr;
	115	env->kvm_run->psw_mask = env->psw.mask;
	116
	117	return ret;
	118	}
	119
	120	int kvm_arch_get_registers(CPUState *env)
	121	{
	122	uint32_t ret;
	123	struct kvm_regs regs;
	124	int i;
	125
	126	ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
	127	if (ret < 0) {
	128	return ret;
	129	}
	130
	131	for (i = 0; i < 16; i++) {
	132	env->regs[i] = regs.gprs[i];
	133	}
	134
	135	env->psw.addr = env->kvm_run->psw_addr;
	136	env->psw.mask = env->kvm_run->psw_mask;
	137
	138	return 0;
	139	}
	140
	141	int kvm_arch_insert_sw_breakpoint(CPUState env, struct kvm_sw_breakpoint bp)
	142	{
	143	static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
	144
	145	if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) \|\|
	146	cpu_memory_rw_debug(env, bp->pc, (uint8_t *)diag_501, 4, 1)) {
	147	return -EINVAL;
	148	}
	149	return 0;
	150	}
	151
	152	int kvm_arch_remove_sw_breakpoint(CPUState env, struct kvm_sw_breakpoint bp)
	153	{
	154	uint8_t t[4];
	155	static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
	156
	157	if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) {
	158	return -EINVAL;
159	} else if (memcmp(t, diag_501, 4)) {
160	return -EINVAL;
161	} else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) {
162	return -EINVAL;
163	}
164
165	return 0;
166	}
167
168	int kvm_arch_pre_run(CPUState env, struct kvm_run run)
169	{
170	return 0;
171	}
172
173	int kvm_arch_post_run(CPUState env, struct kvm_run run)
174	{
175	return 0;
176	}
177
178	static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
179	uint64_t parm64, int vm)
180	{
181	struct kvm_s390_interrupt kvmint;
182	int r;
183
184	if (!env->kvm_state) {
185	return;
186	}
187
188	env->halted = 0;
ee0dc6d3	189	env->exception_index = -1;
0e60a699 AG	190
	191	kvmint.type = type;
	192	kvmint.parm = parm;
	193	kvmint.parm64 = parm64;
	194
	195	if (vm) {
	196	r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
	197	} else {
	198	r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
	199	}
	200
	201	if (r < 0) {
	202	fprintf(stderr, "KVM failed to inject interrupt\n");
	203	exit(1);
	204	}
	205	}
	206
	207	void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token)
	208	{
	209	kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
	210	token, 1);
	211	}
	212
	213	static void kvm_s390_interrupt(CPUState *env, int type, uint32_t code)
	214	{
	215	kvm_s390_interrupt_internal(env, type, code, 0, 0);
	216	}
	217
	218	static void enter_pgmcheck(CPUState *env, uint16_t code)
	219	{
	220	kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
	221	}
	222
	223	static void setcc(CPUState *env, uint64_t cc)
	224	{
	225	env->kvm_run->psw_mask &= ~(3ul << 44);
	226	env->kvm_run->psw_mask \|= (cc & 3) << 44;
	227
	228	env->psw.mask &= ~(3ul << 44);
	229	env->psw.mask \|= (cc & 3) << 44;
	230	}
	231
	232	static int sclp_service_call(CPUState env, struct kvm_run run, uint16_t ipbh0)
	233	{
	234	uint32_t sccb;
	235	uint64_t code;
	236	int r = 0;
	237
	238	cpu_synchronize_state(env);
	239	sccb = env->regs[ipbh0 & 0xf];
	240	code = env->regs[(ipbh0 & 0xf0) >> 4];
	241
	242	dprintf("sclp(0x%x, 0x%lx)\n", sccb, code);
	243
	244	if (sccb & ~0x7ffffff8ul) {
	245	fprintf(stderr, "KVM: invalid sccb address 0x%x\n", sccb);
	246	r = -1;
	247	goto out;
	248	}
	249
	250	switch(code) {
	251	case SCLP_CMDW_READ_SCP_INFO:
	252	case SCLP_CMDW_READ_SCP_INFO_FORCED:
	253	stw_phys(sccb + SCP_MEM_CODE, ram_size >> 20);
254	stb_phys(sccb + SCP_INCREMENT, 1);
255	stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
256	setcc(env, 0);
257
258	kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE,
259	sccb & ~3, 0, 1);
260	break;
261	default:
262	dprintf("KVM: invalid sclp call 0x%x / 0x%lx\n", sccb, code);
263	r = -1;
264	break;
265	}
266
267	out:
268	if (r < 0) {
269	setcc(env, 3);
270	}
271	return 0;
272	}
273
274	static int handle_priv(CPUState env, struct kvm_run run, uint8_t ipa1)
275	{
276	int r = 0;
277	uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
278
279	dprintf("KVM: PRIV: %d\n", ipa1);
280	switch (ipa1) {
281	case PRIV_SCLP_CALL:
282	r = sclp_service_call(env, run, ipbh0);
283	break;
284	default:
285	dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
286	r = -1;
287	break;
288	}
289
290	return r;
291	}
292
293	static int handle_hypercall(CPUState env, struct kvm_run run)
294	{
295	int r;
296
297	cpu_synchronize_state(env);
298	r = s390_virtio_hypercall(env);
0e60a699 AG	299
	300	return r;
	301	}
	302
	303	static int handle_diag(CPUState env, struct kvm_run run, int ipb_code)
	304	{
	305	int r = 0;
	306
	307	switch (ipb_code) {
	308	case DIAG_KVM_HYPERCALL:
	309	r = handle_hypercall(env, run);
	310	break;
	311	case DIAG_KVM_BREAKPOINT:
	312	sleep(10);
	313	break;
	314	default:
	315	dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
	316	r = -1;
	317	break;
	318	}
	319
	320	return r;
	321	}
	322
	323	static int s390_cpu_restart(CPUState *env)
	324	{
	325	kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
	326	env->halted = 0;
ee0dc6d3	327	env->exception_index = -1;
0e60a699 AG	328	qemu_cpu_kick(env);
	329	dprintf("DONE: SIGP cpu restart: %p\n", env);
	330	return 0;
	331	}
	332
	333	static int s390_store_status(CPUState *env, uint32_t parameter)
	334	{
	335	/* XXX */
	336	fprintf(stderr, "XXX SIGP store status\n");
	337	return -1;
	338	}
	339
	340	static int s390_cpu_initial_reset(CPUState *env)
	341	{
	342	/* XXX */
	343	fprintf(stderr, "XXX SIGP init\n");
	344	return -1;
	345	}
	346
	347	static int handle_sigp(CPUState env, struct kvm_run run, uint8_t ipa1)
	348	{
	349	uint8_t order_code;
	350	uint32_t parameter;
	351	uint16_t cpu_addr;
	352	uint8_t t;
	353	int r = -1;
	354	CPUState *target_env;
	355
	356	cpu_synchronize_state(env);
	357
	358	/* get order code */
	359	order_code = run->s390_sieic.ipb >> 28;
	360	if (order_code > 0) {
	361	order_code = env->regs[order_code];
	362	}
	363	order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;
	364
	365	/* get parameters */
	366	t = (ipa1 & 0xf0) >> 4;
	367	if (!(t % 2)) {
	368	t++;
	369	}
	370
	371	parameter = env->regs[t] & 0x7ffffe00;
	372	cpu_addr = env->regs[ipa1 & 0x0f];
	373
	374	target_env = s390_cpu_addr2state(cpu_addr);
	375	if (!target_env) {
	376	goto out;
	377	}
	378
	379	switch (order_code) {
	380	case SIGP_RESTART:
	381	r = s390_cpu_restart(target_env);
	382	break;
	383	case SIGP_STORE_STATUS_ADDR:
	384	r = s390_store_status(target_env, parameter);
	385	break;
	386	case SIGP_SET_ARCH:
	387	/* make the caller panic */
	388	return -1;
	389	case SIGP_INITIAL_CPU_RESET:
	390	r = s390_cpu_initial_reset(target_env);
	391	break;
392	default:
393	fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", ipa1);
394	break;
395	}
396
397	out:
398	setcc(env, r ? 3 : 0);
399	return 0;
400	}
401
402	static int handle_instruction(CPUState env, struct kvm_run run)
403	{
404	unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
405	uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
406	int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16;
d7963c43	407	int r = -1;
0e60a699 AG	408
	409	dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
	410	switch (ipa0) {
	411	case IPA0_PRIV:
	412	r = handle_priv(env, run, ipa1);
	413	break;
	414	case IPA0_DIAG:
	415	r = handle_diag(env, run, ipb_code);
	416	break;
	417	case IPA0_SIGP:
	418	r = handle_sigp(env, run, ipa1);
	419	break;
	420	}
	421
	422	if (r < 0) {
	423	enter_pgmcheck(env, 0x0001);
	424	}
	425	return r;
	426	}
	427
	428	static int handle_intercept(CPUState *env)
	429	{
	430	struct kvm_run *run = env->kvm_run;
	431	int icpt_code = run->s390_sieic.icptcode;
	432	int r = 0;
	433
	434	dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code, env->kvm_run->psw_addr);
	435	switch (icpt_code) {
	436	case ICPT_INSTRUCTION:
	437	r = handle_instruction(env, run);
	438	break;
	439	case ICPT_WAITPSW:
	440	/* XXX What to do on system shutdown? */
	441	env->halted = 1;
	442	env->exception_index = EXCP_HLT;
	443	break;
	444	case ICPT_SOFT_INTERCEPT:
	445	fprintf(stderr, "KVM unimplemented icpt SOFT\n");
	446	exit(1);
	447	break;
	448	case ICPT_CPU_STOP:
	449	qemu_system_shutdown_request();
	450	break;
	451	case ICPT_IO:
	452	fprintf(stderr, "KVM unimplemented icpt IO\n");
	453	exit(1);
	454	break;
	455	default:
	456	fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
	457	exit(1);
	458	break;
	459	}
	460
	461	return r;
	462	}
	463
	464	int kvm_arch_handle_exit(CPUState env, struct kvm_run run)
	465	{
	466	int ret = 0;
	467
	468	switch (run->exit_reason) {
	469	case KVM_EXIT_S390_SIEIC:
	470	ret = handle_intercept(env);
	471	break;
472	case KVM_EXIT_S390_RESET:
473	fprintf(stderr, "RESET not implemented\n");
474	exit(1);
475	break;
476	default:
477	fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
478	break;
479	}
480
481	return ret;
482	}