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

/*
 * QEMU S390x KVM implementation
 *
 * Copyright (c) 2009 Alexander Graf <[email protected]>
 *
 * 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 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 env->halted;
}

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);
}

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

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

static int kvm_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];

    r = sclp_service_call(env, sccb, code);
    if (r) {
        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 = kvm_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)
{
    cpu_synchronize_state(env);
    env->regs[2] = s390_virtio_hypercall(env, env->regs[2], env->regs[1]);

    return 0;
}

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", order_code);
            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 0;
}

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,
            (long)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 <[email protected]>
	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
0e60a699 AG	52	#define ICPT_INSTRUCTION 0x04
	53	#define ICPT_WAITPSW 0x1c
	54	#define ICPT_SOFT_INTERCEPT 0x24
	55	#define ICPT_CPU_STOP 0x28
	56	#define ICPT_IO 0x40
	57
	58	#define SIGP_RESTART 0x06
	59	#define SIGP_INITIAL_CPU_RESET 0x0b
	60	#define SIGP_STORE_STATUS_ADDR 0x0e
	61	#define SIGP_SET_ARCH 0x12
	62
	63	#define SCLP_CMDW_READ_SCP_INFO 0x00020001
	64	#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
	65
94a8d39a JK	66	const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
	67	KVM_CAP_LAST_INFO
	68	};
	69
cad1e282	70	int kvm_arch_init(KVMState *s)
0e60a699 AG	71	{
	72	return 0;
	73	}
	74
	75	int kvm_arch_init_vcpu(CPUState *env)
	76	{
	77	int ret = 0;
	78
	79	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
	80	perror("cannot init reset vcpu");
	81	}
	82
	83	return ret;
	84	}
	85
	86	void kvm_arch_reset_vcpu(CPUState *env)
	87	{
	88	/* FIXME: add code to reset vcpu. */
	89	}
	90
ea375f9a	91	int kvm_arch_put_registers(CPUState *env, int level)
0e60a699 AG	92	{
	93	struct kvm_regs regs;
	94	int ret;
	95	int i;
	96
	97	ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
	98	if (ret < 0) {
	99	return ret;
	100	}
	101
	102	for (i = 0; i < 16; i++) {
	103	regs.gprs[i] = env->regs[i];
	104	}
	105
	106	ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, &regs);
	107	if (ret < 0) {
	108	return ret;
	109	}
	110
	111	env->kvm_run->psw_addr = env->psw.addr;
	112	env->kvm_run->psw_mask = env->psw.mask;
	113
	114	return ret;
	115	}
	116
	117	int kvm_arch_get_registers(CPUState *env)
	118	{
6c33286a	119	int ret;
0e60a699 AG	120	struct kvm_regs regs;
	121	int i;
	122
	123	ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, &regs);
	124	if (ret < 0) {
	125	return ret;
	126	}
	127
	128	for (i = 0; i < 16; i++) {
	129	env->regs[i] = regs.gprs[i];
	130	}
	131
	132	env->psw.addr = env->kvm_run->psw_addr;
	133	env->psw.mask = env->kvm_run->psw_mask;
	134
	135	return 0;
	136	}
	137
	138	int kvm_arch_insert_sw_breakpoint(CPUState env, struct kvm_sw_breakpoint bp)
	139	{
	140	static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
	141
	142	if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) \|\|
	143	cpu_memory_rw_debug(env, bp->pc, (uint8_t *)diag_501, 4, 1)) {
	144	return -EINVAL;
	145	}
	146	return 0;
	147	}
	148
	149	int kvm_arch_remove_sw_breakpoint(CPUState env, struct kvm_sw_breakpoint bp)
	150	{
	151	uint8_t t[4];
	152	static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
	153
	154	if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) {
	155	return -EINVAL;
	156	} else if (memcmp(t, diag_501, 4)) {
	157	return -EINVAL;
	158	} else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) {
	159	return -EINVAL;
	160	}
	161
	162	return 0;
	163	}
	164
7a39fe58	165	void kvm_arch_pre_run(CPUState env, struct kvm_run run)
0e60a699	166	{
0e60a699 AG	167	}
0e60a699 AG	168
7a39fe58	169	void kvm_arch_post_run(CPUState env, struct kvm_run run)
0e60a699	170	{
0e60a699 AG	171	}
0e60a699 AG	172
99036865	173	int kvm_arch_process_async_events(CPUState *env)
0af691d7	174	{
71b12d31	175	return env->halted;
0af691d7 MT	176	}
0af691d7 MT	177
bcec36ea AG	178	void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
bcec36ea AG	179	uint64_t parm64, int vm)
0e60a699 AG	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;
94ad5b00	190	qemu_cpu_kick(env);
0e60a699 AG	191
	192	kvmint.type = type;
	193	kvmint.parm = parm;
	194	kvmint.parm64 = parm64;
	195
	196	if (vm) {
	197	r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
	198	} else {
	199	r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
	200	}
	201
	202	if (r < 0) {
	203	fprintf(stderr, "KVM failed to inject interrupt\n");
	204	exit(1);
	205	}
	206	}
	207
	208	void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token)
	209	{
	210	kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
	211	token, 1);
	212	}
	213
bcec36ea	214	void kvm_s390_interrupt(CPUState *env, int type, uint32_t code)
0e60a699 AG	215	{
	216	kvm_s390_interrupt_internal(env, type, code, 0, 0);
	217	}
	218
	219	static void enter_pgmcheck(CPUState *env, uint16_t code)
	220	{
	221	kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
	222	}
	223
81f7c56c	224	static inline void setcc(CPUState *env, uint64_t cc)
0e60a699	225	{
81f7c56c	226	env->kvm_run->psw_mask &= ~(3ull << 44);
0e60a699 AG	227	env->kvm_run->psw_mask \|= (cc & 3) << 44;
	228
	229	env->psw.mask &= ~(3ul << 44);
	230	env->psw.mask \|= (cc & 3) << 44;
	231	}
	232
bcec36ea AG	233	static int kvm_sclp_service_call(CPUState env, struct kvm_run run,
bcec36ea AG	234	uint16_t ipbh0)
0e60a699 AG	235	{
	236	uint32_t sccb;
	237	uint64_t code;
	238	int r = 0;
	239
	240	cpu_synchronize_state(env);
	241	sccb = env->regs[ipbh0 & 0xf];
	242	code = env->regs[(ipbh0 & 0xf0) >> 4];
	243
81f7c56c AG	244	r = sclp_service_call(env, sccb, code);
81f7c56c AG	245	if (r) {
0e60a699 AG	246	setcc(env, 3);
0e60a699 AG	247	}
81f7c56c	248
0e60a699 AG	249	return 0;
	250	}
	251
	252	static int handle_priv(CPUState env, struct kvm_run run, uint8_t ipa1)
	253	{
	254	int r = 0;
	255	uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
	256
	257	dprintf("KVM: PRIV: %d\n", ipa1);
	258	switch (ipa1) {
	259	case PRIV_SCLP_CALL:
bcec36ea	260	r = kvm_sclp_service_call(env, run, ipbh0);
0e60a699 AG	261	break;
	262	default:
	263	dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
	264	r = -1;
	265	break;
	266	}
	267
	268	return r;
	269	}
	270
	271	static int handle_hypercall(CPUState env, struct kvm_run run)
	272	{
0e60a699	273	cpu_synchronize_state(env);
bcec36ea	274	env->regs[2] = s390_virtio_hypercall(env, env->regs[2], env->regs[1]);
0e60a699	275
bcec36ea	276	return 0;
0e60a699 AG	277	}
	278
	279	static int handle_diag(CPUState env, struct kvm_run run, int ipb_code)
	280	{
	281	int r = 0;
	282
	283	switch (ipb_code) {
	284	case DIAG_KVM_HYPERCALL:
	285	r = handle_hypercall(env, run);
	286	break;
	287	case DIAG_KVM_BREAKPOINT:
	288	sleep(10);
	289	break;
	290	default:
	291	dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
	292	r = -1;
	293	break;
	294	}
	295
	296	return r;
	297	}
	298
	299	static int s390_cpu_restart(CPUState *env)
	300	{
	301	kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
	302	env->halted = 0;
ee0dc6d3	303	env->exception_index = -1;
0e60a699 AG	304	qemu_cpu_kick(env);
	305	dprintf("DONE: SIGP cpu restart: %p\n", env);
	306	return 0;
	307	}
	308
	309	static int s390_store_status(CPUState *env, uint32_t parameter)
	310	{
	311	/* XXX */
	312	fprintf(stderr, "XXX SIGP store status\n");
	313	return -1;
	314	}
	315
	316	static int s390_cpu_initial_reset(CPUState *env)
	317	{
d5900813 AG	318	int i;
	319
	320	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
	321	perror("cannot init reset vcpu");
	322	}
	323
	324	/* Manually zero out all registers */
	325	cpu_synchronize_state(env);
	326	for (i = 0; i < 16; i++) {
	327	env->regs[i] = 0;
	328	}
	329
	330	dprintf("DONE: SIGP initial reset: %p\n", env);
	331	return 0;
0e60a699 AG	332	}
	333
	334	static int handle_sigp(CPUState env, struct kvm_run run, uint8_t ipa1)
	335	{
	336	uint8_t order_code;
	337	uint32_t parameter;
	338	uint16_t cpu_addr;
	339	uint8_t t;
	340	int r = -1;
	341	CPUState *target_env;
	342
	343	cpu_synchronize_state(env);
	344
	345	/* get order code */
	346	order_code = run->s390_sieic.ipb >> 28;
	347	if (order_code > 0) {
	348	order_code = env->regs[order_code];
	349	}
	350	order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;
	351
	352	/* get parameters */
	353	t = (ipa1 & 0xf0) >> 4;
	354	if (!(t % 2)) {
	355	t++;
	356	}
	357
	358	parameter = env->regs[t] & 0x7ffffe00;
	359	cpu_addr = env->regs[ipa1 & 0x0f];
	360
	361	target_env = s390_cpu_addr2state(cpu_addr);
	362	if (!target_env) {
	363	goto out;
	364	}
	365
	366	switch (order_code) {
	367	case SIGP_RESTART:
	368	r = s390_cpu_restart(target_env);
	369	break;
	370	case SIGP_STORE_STATUS_ADDR:
	371	r = s390_store_status(target_env, parameter);
	372	break;
	373	case SIGP_SET_ARCH:
	374	/* make the caller panic */
	375	return -1;
	376	case SIGP_INITIAL_CPU_RESET:
	377	r = s390_cpu_initial_reset(target_env);
	378	break;
	379	default:
a74cdab4	380	fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", order_code);
0e60a699 AG	381	break;
	382	}
	383
	384	out:
	385	setcc(env, r ? 3 : 0);
	386	return 0;
	387	}
	388
	389	static int handle_instruction(CPUState env, struct kvm_run run)
	390	{
	391	unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
	392	uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
	393	int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16;
d7963c43	394	int r = -1;
0e60a699 AG	395
	396	dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
	397	switch (ipa0) {
	398	case IPA0_PRIV:
	399	r = handle_priv(env, run, ipa1);
	400	break;
	401	case IPA0_DIAG:
	402	r = handle_diag(env, run, ipb_code);
	403	break;
	404	case IPA0_SIGP:
	405	r = handle_sigp(env, run, ipa1);
	406	break;
	407	}
	408
	409	if (r < 0) {
	410	enter_pgmcheck(env, 0x0001);
	411	}
359507ee	412	return 0;
0e60a699 AG	413	}
	414
	415	static int handle_intercept(CPUState *env)
	416	{
	417	struct kvm_run *run = env->kvm_run;
	418	int icpt_code = run->s390_sieic.icptcode;
	419	int r = 0;
	420
81f7c56c AG	421	dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code,
81f7c56c AG	422	(long)env->kvm_run->psw_addr);
0e60a699 AG	423	switch (icpt_code) {
	424	case ICPT_INSTRUCTION:
	425	r = handle_instruction(env, run);
	426	break;
	427	case ICPT_WAITPSW:
	428	/* XXX What to do on system shutdown? */
	429	env->halted = 1;
	430	env->exception_index = EXCP_HLT;
	431	break;
	432	case ICPT_SOFT_INTERCEPT:
	433	fprintf(stderr, "KVM unimplemented icpt SOFT\n");
	434	exit(1);
	435	break;
	436	case ICPT_CPU_STOP:
	437	qemu_system_shutdown_request();
	438	break;
	439	case ICPT_IO:
	440	fprintf(stderr, "KVM unimplemented icpt IO\n");
	441	exit(1);
	442	break;
	443	default:
	444	fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
	445	exit(1);
	446	break;
	447	}
	448
	449	return r;
	450	}
	451
	452	int kvm_arch_handle_exit(CPUState env, struct kvm_run run)
	453	{
	454	int ret = 0;
	455
	456	switch (run->exit_reason) {
	457	case KVM_EXIT_S390_SIEIC:
	458	ret = handle_intercept(env);
	459	break;
	460	case KVM_EXIT_S390_RESET:
	461	fprintf(stderr, "RESET not implemented\n");
	462	exit(1);
	463	break;
	464	default:
	465	fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
	466	break;
	467	}
	468
bb4ea393 JK	469	if (ret == 0) {
	470	ret = EXCP_INTERRUPT;
	471	} else if (ret > 0) {
	472	ret = 0;
	473	}
0e60a699 AG	474	return ret;
0e60a699 AG	475	}
4513d923 GN	476
	477	bool kvm_arch_stop_on_emulation_error(CPUState *env)
	478	{
	479	return true;
	480	}
a1b87fe0 JK	481
	482	int kvm_arch_on_sigbus_vcpu(CPUState env, int code, void addr)
	483	{
	484	return 1;
	485	}
	486
	487	int kvm_arch_on_sigbus(int code, void *addr)
	488	{
	489	return 1;
	490	}