[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)
{
    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;
}

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;
}

int kvm_arch_process_irqchip_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;

    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;
    }

    return ret;
}

bool kvm_arch_stop_on_emulation_error(CPUState *env)
{
    return true;
}
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	{
6c33286a	122	int ret;
0e60a699 AG	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
0af691d7 MT	178	int kvm_arch_process_irqchip_events(CPUState *env)
	179	{
	180	return 0;
	181	}
	182
0e60a699 AG	183	static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
	184	uint64_t parm64, int vm)
	185	{
	186	struct kvm_s390_interrupt kvmint;
	187	int r;
	188
	189	if (!env->kvm_state) {
	190	return;
	191	}
	192
	193	env->halted = 0;
ee0dc6d3	194	env->exception_index = -1;
0e60a699 AG	195
	196	kvmint.type = type;
	197	kvmint.parm = parm;
	198	kvmint.parm64 = parm64;
	199
	200	if (vm) {
	201	r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
	202	} else {
	203	r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
	204	}
	205
	206	if (r < 0) {
	207	fprintf(stderr, "KVM failed to inject interrupt\n");
	208	exit(1);
	209	}
	210	}
	211
	212	void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token)
	213	{
	214	kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
	215	token, 1);
	216	}
	217
	218	static void kvm_s390_interrupt(CPUState *env, int type, uint32_t code)
	219	{
	220	kvm_s390_interrupt_internal(env, type, code, 0, 0);
	221	}
	222
	223	static void enter_pgmcheck(CPUState *env, uint16_t code)
	224	{
	225	kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
	226	}
	227
	228	static void setcc(CPUState *env, uint64_t cc)
	229	{
	230	env->kvm_run->psw_mask &= ~(3ul << 44);
	231	env->kvm_run->psw_mask \|= (cc & 3) << 44;
	232
	233	env->psw.mask &= ~(3ul << 44);
	234	env->psw.mask \|= (cc & 3) << 44;
	235	}
	236
	237	static int sclp_service_call(CPUState env, struct kvm_run run, uint16_t ipbh0)
	238	{
	239	uint32_t sccb;
	240	uint64_t code;
	241	int r = 0;
	242
	243	cpu_synchronize_state(env);
	244	sccb = env->regs[ipbh0 & 0xf];
	245	code = env->regs[(ipbh0 & 0xf0) >> 4];
	246
	247	dprintf("sclp(0x%x, 0x%lx)\n", sccb, code);
	248
	249	if (sccb & ~0x7ffffff8ul) {
	250	fprintf(stderr, "KVM: invalid sccb address 0x%x\n", sccb);
	251	r = -1;
	252	goto out;
	253	}
	254
	255	switch(code) {
	256	case SCLP_CMDW_READ_SCP_INFO:
	257	case SCLP_CMDW_READ_SCP_INFO_FORCED:
	258	stw_phys(sccb + SCP_MEM_CODE, ram_size >> 20);
259	stb_phys(sccb + SCP_INCREMENT, 1);
260	stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
261	setcc(env, 0);
262
263	kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE,
264	sccb & ~3, 0, 1);
265	break;
266	default:
267	dprintf("KVM: invalid sclp call 0x%x / 0x%lx\n", sccb, code);
268	r = -1;
269	break;
270	}
271
272	out:
273	if (r < 0) {
274	setcc(env, 3);
275	}
276	return 0;
277	}
278
279	static int handle_priv(CPUState env, struct kvm_run run, uint8_t ipa1)
280	{
281	int r = 0;
282	uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
283
284	dprintf("KVM: PRIV: %d\n", ipa1);
285	switch (ipa1) {
286	case PRIV_SCLP_CALL:
287	r = sclp_service_call(env, run, ipbh0);
288	break;
289	default:
290	dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
291	r = -1;
292	break;
293	}
294
295	return r;
296	}
297
298	static int handle_hypercall(CPUState env, struct kvm_run run)
299	{
300	int r;
301
302	cpu_synchronize_state(env);
303	r = s390_virtio_hypercall(env);
0e60a699 AG	304
	305	return r;
	306	}
	307
	308	static int handle_diag(CPUState env, struct kvm_run run, int ipb_code)
	309	{
	310	int r = 0;
	311
	312	switch (ipb_code) {
	313	case DIAG_KVM_HYPERCALL:
	314	r = handle_hypercall(env, run);
	315	break;
	316	case DIAG_KVM_BREAKPOINT:
	317	sleep(10);
	318	break;
	319	default:
	320	dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
	321	r = -1;
	322	break;
	323	}
	324
	325	return r;
	326	}
	327
	328	static int s390_cpu_restart(CPUState *env)
	329	{
	330	kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
	331	env->halted = 0;
ee0dc6d3	332	env->exception_index = -1;
0e60a699 AG	333	qemu_cpu_kick(env);
	334	dprintf("DONE: SIGP cpu restart: %p\n", env);
	335	return 0;
	336	}
	337
	338	static int s390_store_status(CPUState *env, uint32_t parameter)
	339	{
	340	/* XXX */
	341	fprintf(stderr, "XXX SIGP store status\n");
	342	return -1;
	343	}
	344
	345	static int s390_cpu_initial_reset(CPUState *env)
	346	{
d5900813 AG	347	int i;
	348
	349	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
	350	perror("cannot init reset vcpu");
	351	}
	352
	353	/* Manually zero out all registers */
	354	cpu_synchronize_state(env);
	355	for (i = 0; i < 16; i++) {
	356	env->regs[i] = 0;
	357	}
	358
	359	dprintf("DONE: SIGP initial reset: %p\n", env);
	360	return 0;
0e60a699 AG	361	}
	362
	363	static int handle_sigp(CPUState env, struct kvm_run run, uint8_t ipa1)
	364	{
	365	uint8_t order_code;
	366	uint32_t parameter;
	367	uint16_t cpu_addr;
	368	uint8_t t;
	369	int r = -1;
	370	CPUState *target_env;
	371
	372	cpu_synchronize_state(env);
	373
	374	/* get order code */
	375	order_code = run->s390_sieic.ipb >> 28;
	376	if (order_code > 0) {
	377	order_code = env->regs[order_code];
	378	}
	379	order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;
	380
	381	/* get parameters */
	382	t = (ipa1 & 0xf0) >> 4;
	383	if (!(t % 2)) {
	384	t++;
	385	}
	386
	387	parameter = env->regs[t] & 0x7ffffe00;
	388	cpu_addr = env->regs[ipa1 & 0x0f];
	389
	390	target_env = s390_cpu_addr2state(cpu_addr);
	391	if (!target_env) {
	392	goto out;
	393	}
	394
	395	switch (order_code) {
	396	case SIGP_RESTART:
	397	r = s390_cpu_restart(target_env);
	398	break;
	399	case SIGP_STORE_STATUS_ADDR:
	400	r = s390_store_status(target_env, parameter);
	401	break;
	402	case SIGP_SET_ARCH:
	403	/* make the caller panic */
	404	return -1;
	405	case SIGP_INITIAL_CPU_RESET:
	406	r = s390_cpu_initial_reset(target_env);
	407	break;
	408	default:
	409	fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", ipa1);
	410	break;
	411	}
	412
	413	out:
	414	setcc(env, r ? 3 : 0);
	415	return 0;
	416	}
	417
	418	static int handle_instruction(CPUState env, struct kvm_run run)
	419	{
	420	unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
	421	uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
	422	int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16;
d7963c43	423	int r = -1;
0e60a699 AG	424
	425	dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
	426	switch (ipa0) {
	427	case IPA0_PRIV:
	428	r = handle_priv(env, run, ipa1);
	429	break;
	430	case IPA0_DIAG:
	431	r = handle_diag(env, run, ipb_code);
	432	break;
	433	case IPA0_SIGP:
	434	r = handle_sigp(env, run, ipa1);
	435	break;
	436	}
	437
	438	if (r < 0) {
	439	enter_pgmcheck(env, 0x0001);
	440	}
	441	return r;
	442	}
	443
	444	static int handle_intercept(CPUState *env)
	445	{
	446	struct kvm_run *run = env->kvm_run;
	447	int icpt_code = run->s390_sieic.icptcode;
	448	int r = 0;
	449
	450	dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code, env->kvm_run->psw_addr);
	451	switch (icpt_code) {
	452	case ICPT_INSTRUCTION:
	453	r = handle_instruction(env, run);
	454	break;
	455	case ICPT_WAITPSW:
	456	/* XXX What to do on system shutdown? */
	457	env->halted = 1;
	458	env->exception_index = EXCP_HLT;
	459	break;
	460	case ICPT_SOFT_INTERCEPT:
	461	fprintf(stderr, "KVM unimplemented icpt SOFT\n");
	462	exit(1);
	463	break;
	464	case ICPT_CPU_STOP:
	465	qemu_system_shutdown_request();
	466	break;
	467	case ICPT_IO:
	468	fprintf(stderr, "KVM unimplemented icpt IO\n");
	469	exit(1);
	470	break;
	471	default:
	472	fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
	473	exit(1);
	474	break;
	475	}
	476
	477	return r;
	478	}
	479
	480	int kvm_arch_handle_exit(CPUState env, struct kvm_run run)
	481	{
	482	int ret = 0;
	483
	484	switch (run->exit_reason) {
	485	case KVM_EXIT_S390_SIEIC:
	486	ret = handle_intercept(env);
	487	break;
488	case KVM_EXIT_S390_RESET:
489	fprintf(stderr, "RESET not implemented\n");
490	exit(1);
491	break;
492	default:
493	fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
494	break;
495	}
496
497	return ret;
498	}
4513d923 GN	499
	500	bool kvm_arch_stop_on_emulation_error(CPUState *env)
	501	{
	502	return true;
	503	}