[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;
}

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
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
	172	int kvm_arch_pre_run(CPUState env, struct kvm_run run)
	173	{
	174	return 0;
	175	}
	176
	177	int kvm_arch_post_run(CPUState env, struct kvm_run run)
	178	{
	179	return 0;
	180	}
	181
0af691d7 MT	182	int kvm_arch_process_irqchip_events(CPUState *env)
	183	{
	184	return 0;
	185	}
	186
0e60a699 AG	187	static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,
	188	uint64_t parm64, int vm)
	189	{
	190	struct kvm_s390_interrupt kvmint;
	191	int r;
	192
	193	if (!env->kvm_state) {
	194	return;
	195	}
	196
	197	env->halted = 0;
ee0dc6d3	198	env->exception_index = -1;
0e60a699 AG	199
	200	kvmint.type = type;
	201	kvmint.parm = parm;
	202	kvmint.parm64 = parm64;
	203
	204	if (vm) {
	205	r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
	206	} else {
	207	r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
	208	}
	209
	210	if (r < 0) {
	211	fprintf(stderr, "KVM failed to inject interrupt\n");
	212	exit(1);
	213	}
	214	}
	215
	216	void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token)
	217	{
	218	kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
	219	token, 1);
	220	}
	221
	222	static void kvm_s390_interrupt(CPUState *env, int type, uint32_t code)
	223	{
	224	kvm_s390_interrupt_internal(env, type, code, 0, 0);
	225	}
	226
	227	static void enter_pgmcheck(CPUState *env, uint16_t code)
	228	{
	229	kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
	230	}
	231
	232	static void setcc(CPUState *env, uint64_t cc)
	233	{
	234	env->kvm_run->psw_mask &= ~(3ul << 44);
	235	env->kvm_run->psw_mask \|= (cc & 3) << 44;
	236
	237	env->psw.mask &= ~(3ul << 44);
	238	env->psw.mask \|= (cc & 3) << 44;
	239	}
	240
	241	static int sclp_service_call(CPUState env, struct kvm_run run, uint16_t ipbh0)
	242	{
	243	uint32_t sccb;
	244	uint64_t code;
	245	int r = 0;
	246
	247	cpu_synchronize_state(env);
	248	sccb = env->regs[ipbh0 & 0xf];
	249	code = env->regs[(ipbh0 & 0xf0) >> 4];
	250
	251	dprintf("sclp(0x%x, 0x%lx)\n", sccb, code);
	252
	253	if (sccb & ~0x7ffffff8ul) {
	254	fprintf(stderr, "KVM: invalid sccb address 0x%x\n", sccb);
	255	r = -1;
	256	goto out;
	257	}
	258
	259	switch(code) {
	260	case SCLP_CMDW_READ_SCP_INFO:
	261	case SCLP_CMDW_READ_SCP_INFO_FORCED:
	262	stw_phys(sccb + SCP_MEM_CODE, ram_size >> 20);
263	stb_phys(sccb + SCP_INCREMENT, 1);
264	stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
265	setcc(env, 0);
266
267	kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE,
268	sccb & ~3, 0, 1);
269	break;
270	default:
271	dprintf("KVM: invalid sclp call 0x%x / 0x%lx\n", sccb, code);
272	r = -1;
273	break;
274	}
275
276	out:
277	if (r < 0) {
278	setcc(env, 3);
279	}
280	return 0;
281	}
282
283	static int handle_priv(CPUState env, struct kvm_run run, uint8_t ipa1)
284	{
285	int r = 0;
286	uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
287
288	dprintf("KVM: PRIV: %d\n", ipa1);
289	switch (ipa1) {
290	case PRIV_SCLP_CALL:
291	r = sclp_service_call(env, run, ipbh0);
292	break;
293	default:
294	dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
295	r = -1;
296	break;
297	}
298
299	return r;
300	}
301
302	static int handle_hypercall(CPUState env, struct kvm_run run)
303	{
304	int r;
305
306	cpu_synchronize_state(env);
307	r = s390_virtio_hypercall(env);
0e60a699 AG	308
	309	return r;
	310	}
	311
	312	static int handle_diag(CPUState env, struct kvm_run run, int ipb_code)
	313	{
	314	int r = 0;
	315
	316	switch (ipb_code) {
	317	case DIAG_KVM_HYPERCALL:
	318	r = handle_hypercall(env, run);
	319	break;
	320	case DIAG_KVM_BREAKPOINT:
	321	sleep(10);
	322	break;
	323	default:
	324	dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
	325	r = -1;
	326	break;
	327	}
	328
	329	return r;
	330	}
	331
	332	static int s390_cpu_restart(CPUState *env)
	333	{
	334	kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
	335	env->halted = 0;
ee0dc6d3	336	env->exception_index = -1;
0e60a699 AG	337	qemu_cpu_kick(env);
	338	dprintf("DONE: SIGP cpu restart: %p\n", env);
	339	return 0;
	340	}
	341
	342	static int s390_store_status(CPUState *env, uint32_t parameter)
	343	{
	344	/* XXX */
	345	fprintf(stderr, "XXX SIGP store status\n");
	346	return -1;
	347	}
	348
	349	static int s390_cpu_initial_reset(CPUState *env)
	350	{
d5900813 AG	351	int i;
	352
	353	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
	354	perror("cannot init reset vcpu");
	355	}
	356
	357	/* Manually zero out all registers */
	358	cpu_synchronize_state(env);
	359	for (i = 0; i < 16; i++) {
	360	env->regs[i] = 0;
	361	}
	362
	363	dprintf("DONE: SIGP initial reset: %p\n", env);
	364	return 0;
0e60a699 AG	365	}
	366
	367	static int handle_sigp(CPUState env, struct kvm_run run, uint8_t ipa1)
	368	{
	369	uint8_t order_code;
	370	uint32_t parameter;
	371	uint16_t cpu_addr;
	372	uint8_t t;
	373	int r = -1;
	374	CPUState *target_env;
	375
	376	cpu_synchronize_state(env);
	377
	378	/* get order code */
	379	order_code = run->s390_sieic.ipb >> 28;
	380	if (order_code > 0) {
	381	order_code = env->regs[order_code];
	382	}
	383	order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;
	384
	385	/* get parameters */
	386	t = (ipa1 & 0xf0) >> 4;
	387	if (!(t % 2)) {
	388	t++;
	389	}
	390
	391	parameter = env->regs[t] & 0x7ffffe00;
	392	cpu_addr = env->regs[ipa1 & 0x0f];
	393
	394	target_env = s390_cpu_addr2state(cpu_addr);
	395	if (!target_env) {
	396	goto out;
	397	}
	398
	399	switch (order_code) {
	400	case SIGP_RESTART:
	401	r = s390_cpu_restart(target_env);
	402	break;
	403	case SIGP_STORE_STATUS_ADDR:
	404	r = s390_store_status(target_env, parameter);
	405	break;
	406	case SIGP_SET_ARCH:
	407	/* make the caller panic */
	408	return -1;
	409	case SIGP_INITIAL_CPU_RESET:
	410	r = s390_cpu_initial_reset(target_env);
	411	break;
	412	default:
	413	fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", ipa1);
	414	break;
	415	}
	416
	417	out:
	418	setcc(env, r ? 3 : 0);
	419	return 0;
	420	}
	421
	422	static int handle_instruction(CPUState env, struct kvm_run run)
	423	{
	424	unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
	425	uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
	426	int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16;
d7963c43	427	int r = -1;
0e60a699 AG	428
	429	dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
	430	switch (ipa0) {
	431	case IPA0_PRIV:
	432	r = handle_priv(env, run, ipa1);
	433	break;
	434	case IPA0_DIAG:
	435	r = handle_diag(env, run, ipb_code);
	436	break;
	437	case IPA0_SIGP:
	438	r = handle_sigp(env, run, ipa1);
	439	break;
	440	}
	441
	442	if (r < 0) {
	443	enter_pgmcheck(env, 0x0001);
	444	}
	445	return r;
	446	}
	447
	448	static int handle_intercept(CPUState *env)
	449	{
	450	struct kvm_run *run = env->kvm_run;
	451	int icpt_code = run->s390_sieic.icptcode;
	452	int r = 0;
	453
	454	dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code, env->kvm_run->psw_addr);
	455	switch (icpt_code) {
	456	case ICPT_INSTRUCTION:
	457	r = handle_instruction(env, run);
	458	break;
	459	case ICPT_WAITPSW:
	460	/* XXX What to do on system shutdown? */
	461	env->halted = 1;
	462	env->exception_index = EXCP_HLT;
	463	break;
	464	case ICPT_SOFT_INTERCEPT:
	465	fprintf(stderr, "KVM unimplemented icpt SOFT\n");
	466	exit(1);
	467	break;
	468	case ICPT_CPU_STOP:
	469	qemu_system_shutdown_request();
	470	break;
	471	case ICPT_IO:
	472	fprintf(stderr, "KVM unimplemented icpt IO\n");
	473	exit(1);
	474	break;
	475	default:
	476	fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
	477	exit(1);
	478	break;
	479	}
	480
	481	return r;
	482	}
	483
	484	int kvm_arch_handle_exit(CPUState env, struct kvm_run run)
	485	{
	486	int ret = 0;
	487
	488	switch (run->exit_reason) {
	489	case KVM_EXIT_S390_SIEIC:
	490	ret = handle_intercept(env);
	491	break;
492	case KVM_EXIT_S390_RESET:
493	fprintf(stderr, "RESET not implemented\n");
494	exit(1);
495	break;
496	default:
497	fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
498	break;
499	}
500
501	return ret;
502	}
4513d923 GN	503
	504	bool kvm_arch_stop_on_emulation_error(CPUState *env)
	505	{
	506	return true;
	507	}