[mirror_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 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(CPUS390XState *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(CPUS390XState *env)
{
    /* FIXME: add code to reset vcpu. */
}

int kvm_arch_put_registers(CPUS390XState *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(CPUS390XState *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(CPUS390XState *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(CPUS390XState *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(CPUS390XState *env, struct kvm_run *run)
{
}

void kvm_arch_post_run(CPUS390XState *env, struct kvm_run *run)
{
}

int kvm_arch_process_async_events(CPUS390XState *env)
{
    return env->halted;
}

void kvm_s390_interrupt_internal(CPUS390XState *env, int type, uint32_t parm,
                                 uint64_t parm64, int vm)
{
    struct kvm_s390_interrupt kvmint;
    int r;

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

    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(CPUS390XState *env, int config_change, uint64_t token)
{
    kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
                                token, 1);
}

void kvm_s390_interrupt(CPUS390XState *env, int type, uint32_t code)
{
    kvm_s390_interrupt_internal(env, type, code, 0, 0);
}

static void enter_pgmcheck(CPUS390XState *env, uint16_t code)
{
    kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
}

static inline void setcc(CPUS390XState *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(CPUS390XState *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(CPUS390XState *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(CPUS390XState *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(CPUS390XState *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(S390CPU *cpu)
{
    CPUS390XState *env = &cpu->env;

    kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
    s390_add_running_cpu(env);
    qemu_cpu_kick(env);
    dprintf("DONE: SIGP cpu restart: %p\n", env);
    return 0;
}

static int s390_store_status(CPUS390XState *env, uint32_t parameter)
{
    /* XXX */
    fprintf(stderr, "XXX SIGP store status\n");
    return -1;
}

static int s390_cpu_initial_reset(CPUS390XState *env)
{
    int i;

    s390_del_running_cpu(env);
    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(CPUS390XState *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;
    S390CPU *target_cpu;
    CPUS390XState *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_cpu = s390_cpu_addr2state(cpu_addr);
    if (target_cpu == NULL) {
        goto out;
    }
    target_env = &target_cpu->env;

    switch (order_code) {
        case SIGP_RESTART:
            r = s390_cpu_restart(target_cpu);
            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(CPUS390XState *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 bool is_special_wait_psw(CPUS390XState *env)
{
    /* signal quiesce */
    return env->kvm_run->psw_addr == 0xfffUL;
}

static int handle_intercept(CPUS390XState *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:
            if (s390_del_running_cpu(env) == 0 &&
                is_special_wait_psw(env)) {
                qemu_system_shutdown_request();
            }
            r = EXCP_HALTED;
            break;
        case ICPT_CPU_STOP:
            if (s390_del_running_cpu(env) == 0) {
                qemu_system_shutdown_request();
            }
            r = EXCP_HALTED;
            break;
        case ICPT_SOFT_INTERCEPT:
            fprintf(stderr, "KVM unimplemented icpt SOFT\n");
            exit(1);
            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(CPUS390XState *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:
            qemu_system_reset_request();
            break;
        default:
            fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
            break;
    }

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

bool kvm_arch_stop_on_emulation_error(CPUS390XState *env)
{
    return true;
}

int kvm_arch_on_sigbus_vcpu(CPUS390XState *env, int code, void *addr)
{
    return 1;
}

int kvm_arch_on_sigbus(int code, void *addr)
{
    return 1;
}
Commit	Line	Data
0e60a699 AG	1	/*
	2	* QEMU S390x KVM implementation
	3	*
	4	* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
	17	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <sys/types.h>
	21	#include <sys/ioctl.h>
	22	#include <sys/mman.h>
	23
	24	#include <linux/kvm.h>
	25	#include <asm/ptrace.h>
	26
	27	#include "qemu-common.h"
	28	#include "qemu-timer.h"
	29	#include "sysemu.h"
	30	#include "kvm.h"
	31	#include "cpu.h"
	32	#include "device_tree.h"
	33
	34	/* #define DEBUG_KVM */
	35
	36	#ifdef DEBUG_KVM
	37	#define dprintf(fmt, ...) \
	38	do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
	39	#else
	40	#define dprintf(fmt, ...) \
	41	do { } while (0)
	42	#endif
	43
	44	#define IPA0_DIAG 0x8300
	45	#define IPA0_SIGP 0xae00
	46	#define IPA0_PRIV 0xb200
	47
	48	#define PRIV_SCLP_CALL 0x20
	49	#define DIAG_KVM_HYPERCALL 0x500
	50	#define DIAG_KVM_BREAKPOINT 0x501
	51
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
a4e3ad19	75	int kvm_arch_init_vcpu(CPUS390XState *env)
0e60a699 AG	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
a4e3ad19	86	void kvm_arch_reset_vcpu(CPUS390XState *env)
0e60a699 AG	87	{
	88	/* FIXME: add code to reset vcpu. */
	89	}
	90
a4e3ad19	91	int kvm_arch_put_registers(CPUS390XState *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
a4e3ad19	117	int kvm_arch_get_registers(CPUS390XState *env)
0e60a699	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
a4e3ad19	138	int kvm_arch_insert_sw_breakpoint(CPUS390XState env, struct kvm_sw_breakpoint bp)
0e60a699 AG	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
a4e3ad19	149	int kvm_arch_remove_sw_breakpoint(CPUS390XState env, struct kvm_sw_breakpoint bp)
0e60a699 AG	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
a4e3ad19	165	void kvm_arch_pre_run(CPUS390XState env, struct kvm_run run)
0e60a699	166	{
0e60a699 AG	167	}
0e60a699 AG	168
a4e3ad19	169	void kvm_arch_post_run(CPUS390XState env, struct kvm_run run)
0e60a699	170	{
0e60a699 AG	171	}
0e60a699 AG	172
a4e3ad19	173	int kvm_arch_process_async_events(CPUS390XState *env)
0af691d7	174	{
71b12d31	175	return env->halted;
0af691d7 MT	176	}
0af691d7 MT	177
a4e3ad19	178	void kvm_s390_interrupt_internal(CPUS390XState *env, int type, uint32_t parm,
bcec36ea	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
0e60a699 AG	188	kvmint.type = type;
	189	kvmint.parm = parm;
	190	kvmint.parm64 = parm64;
	191
	192	if (vm) {
	193	r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint);
	194	} else {
	195	r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint);
	196	}
	197
	198	if (r < 0) {
	199	fprintf(stderr, "KVM failed to inject interrupt\n");
	200	exit(1);
	201	}
	202	}
	203
a4e3ad19	204	void kvm_s390_virtio_irq(CPUS390XState *env, int config_change, uint64_t token)
0e60a699 AG	205	{
	206	kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change,
	207	token, 1);
	208	}
	209
a4e3ad19	210	void kvm_s390_interrupt(CPUS390XState *env, int type, uint32_t code)
0e60a699 AG	211	{
	212	kvm_s390_interrupt_internal(env, type, code, 0, 0);
	213	}
	214
a4e3ad19	215	static void enter_pgmcheck(CPUS390XState *env, uint16_t code)
0e60a699 AG	216	{
	217	kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code);
	218	}
	219
a4e3ad19	220	static inline void setcc(CPUS390XState *env, uint64_t cc)
0e60a699	221	{
81f7c56c	222	env->kvm_run->psw_mask &= ~(3ull << 44);
0e60a699 AG	223	env->kvm_run->psw_mask \|= (cc & 3) << 44;
	224
	225	env->psw.mask &= ~(3ul << 44);
	226	env->psw.mask \|= (cc & 3) << 44;
	227	}
	228
a4e3ad19	229	static int kvm_sclp_service_call(CPUS390XState env, struct kvm_run run,
bcec36ea	230	uint16_t ipbh0)
0e60a699 AG	231	{
	232	uint32_t sccb;
	233	uint64_t code;
	234	int r = 0;
	235
	236	cpu_synchronize_state(env);
	237	sccb = env->regs[ipbh0 & 0xf];
	238	code = env->regs[(ipbh0 & 0xf0) >> 4];
	239
81f7c56c AG	240	r = sclp_service_call(env, sccb, code);
81f7c56c AG	241	if (r) {
0e60a699 AG	242	setcc(env, 3);
0e60a699 AG	243	}
81f7c56c	244
0e60a699 AG	245	return 0;
	246	}
	247
a4e3ad19	248	static int handle_priv(CPUS390XState env, struct kvm_run run, uint8_t ipa1)
0e60a699 AG	249	{
	250	int r = 0;
	251	uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16;
	252
	253	dprintf("KVM: PRIV: %d\n", ipa1);
	254	switch (ipa1) {
	255	case PRIV_SCLP_CALL:
bcec36ea	256	r = kvm_sclp_service_call(env, run, ipbh0);
0e60a699 AG	257	break;
	258	default:
	259	dprintf("KVM: unknown PRIV: 0x%x\n", ipa1);
	260	r = -1;
	261	break;
	262	}
	263
	264	return r;
	265	}
	266
a4e3ad19	267	static int handle_hypercall(CPUS390XState env, struct kvm_run run)
0e60a699	268	{
0e60a699	269	cpu_synchronize_state(env);
bcec36ea	270	env->regs[2] = s390_virtio_hypercall(env, env->regs[2], env->regs[1]);
0e60a699	271
bcec36ea	272	return 0;
0e60a699 AG	273	}
0e60a699 AG	274
a4e3ad19	275	static int handle_diag(CPUS390XState env, struct kvm_run run, int ipb_code)
0e60a699 AG	276	{
	277	int r = 0;
	278
	279	switch (ipb_code) {
	280	case DIAG_KVM_HYPERCALL:
	281	r = handle_hypercall(env, run);
	282	break;
	283	case DIAG_KVM_BREAKPOINT:
	284	sleep(10);
	285	break;
	286	default:
	287	dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code);
	288	r = -1;
	289	break;
	290	}
	291
	292	return r;
	293	}
	294
3edb8f92	295	static int s390_cpu_restart(S390CPU *cpu)
0e60a699	296	{
3edb8f92 AF	297	CPUS390XState *env = &cpu->env;
3edb8f92 AF	298
0e60a699	299	kvm_s390_interrupt(env, KVM_S390_RESTART, 0);
854e42f3	300	s390_add_running_cpu(env);
0e60a699 AG	301	qemu_cpu_kick(env);
	302	dprintf("DONE: SIGP cpu restart: %p\n", env);
	303	return 0;
	304	}
	305
a4e3ad19	306	static int s390_store_status(CPUS390XState *env, uint32_t parameter)
0e60a699 AG	307	{
	308	/* XXX */
	309	fprintf(stderr, "XXX SIGP store status\n");
	310	return -1;
	311	}
	312
a4e3ad19	313	static int s390_cpu_initial_reset(CPUS390XState *env)
0e60a699	314	{
d5900813 AG	315	int i;
d5900813 AG	316
2fb70f6f	317	s390_del_running_cpu(env);
d5900813 AG	318	if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) {
	319	perror("cannot init reset vcpu");
	320	}
	321
	322	/* Manually zero out all registers */
	323	cpu_synchronize_state(env);
	324	for (i = 0; i < 16; i++) {
	325	env->regs[i] = 0;
	326	}
	327
	328	dprintf("DONE: SIGP initial reset: %p\n", env);
	329	return 0;
0e60a699 AG	330	}
0e60a699 AG	331
a4e3ad19	332	static int handle_sigp(CPUS390XState env, struct kvm_run run, uint8_t ipa1)
0e60a699 AG	333	{
	334	uint8_t order_code;
	335	uint32_t parameter;
	336	uint16_t cpu_addr;
	337	uint8_t t;
	338	int r = -1;
45fa769b	339	S390CPU *target_cpu;
a4e3ad19	340	CPUS390XState *target_env;
0e60a699 AG	341
	342	cpu_synchronize_state(env);
	343
	344	/* get order code */
	345	order_code = run->s390_sieic.ipb >> 28;
	346	if (order_code > 0) {
	347	order_code = env->regs[order_code];
	348	}
	349	order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;
	350
	351	/* get parameters */
	352	t = (ipa1 & 0xf0) >> 4;
	353	if (!(t % 2)) {
	354	t++;
	355	}
	356
	357	parameter = env->regs[t] & 0x7ffffe00;
	358	cpu_addr = env->regs[ipa1 & 0x0f];
	359
45fa769b AF	360	target_cpu = s390_cpu_addr2state(cpu_addr);
45fa769b AF	361	if (target_cpu == NULL) {
0e60a699 AG	362	goto out;
0e60a699 AG	363	}
45fa769b	364	target_env = &target_cpu->env;
0e60a699 AG	365
	366	switch (order_code) {
	367	case SIGP_RESTART:
3edb8f92	368	r = s390_cpu_restart(target_cpu);
0e60a699 AG	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
a4e3ad19	389	static int handle_instruction(CPUS390XState env, struct kvm_run run)
0e60a699 AG	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	}
0e60a699 AG	414
eca3ed03 CB	415	static bool is_special_wait_psw(CPUS390XState *env)
	416	{
	417	/* signal quiesce */
	418	return env->kvm_run->psw_addr == 0xfffUL;
	419	}
	420
a4e3ad19	421	static int handle_intercept(CPUS390XState *env)
0e60a699 AG	422	{
	423	struct kvm_run *run = env->kvm_run;
	424	int icpt_code = run->s390_sieic.icptcode;
	425	int r = 0;
	426
81f7c56c AG	427	dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code,
81f7c56c AG	428	(long)env->kvm_run->psw_addr);
0e60a699 AG	429	switch (icpt_code) {
	430	case ICPT_INSTRUCTION:
	431	r = handle_instruction(env, run);
	432	break;
	433	case ICPT_WAITPSW:
eca3ed03 CB	434	if (s390_del_running_cpu(env) == 0 &&
	435	is_special_wait_psw(env)) {
	436	qemu_system_shutdown_request();
	437	}
	438	r = EXCP_HALTED;
	439	break;
854e42f3 CB	440	case ICPT_CPU_STOP:
	441	if (s390_del_running_cpu(env) == 0) {
	442	qemu_system_shutdown_request();
	443	}
	444	r = EXCP_HALTED;
0e60a699 AG	445	break;
	446	case ICPT_SOFT_INTERCEPT:
	447	fprintf(stderr, "KVM unimplemented icpt SOFT\n");
	448	exit(1);
	449	break;
0e60a699 AG	450	case ICPT_IO:
	451	fprintf(stderr, "KVM unimplemented icpt IO\n");
	452	exit(1);
	453	break;
	454	default:
	455	fprintf(stderr, "Unknown intercept code: %d\n", icpt_code);
	456	exit(1);
	457	break;
	458	}
	459
	460	return r;
	461	}
	462
a4e3ad19	463	int kvm_arch_handle_exit(CPUS390XState env, struct kvm_run run)
0e60a699 AG	464	{
	465	int ret = 0;
	466
	467	switch (run->exit_reason) {
	468	case KVM_EXIT_S390_SIEIC:
	469	ret = handle_intercept(env);
	470	break;
	471	case KVM_EXIT_S390_RESET:
add142e0	472	qemu_system_reset_request();
0e60a699 AG	473	break;
	474	default:
	475	fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
	476	break;
	477	}
	478
bb4ea393 JK	479	if (ret == 0) {
bb4ea393 JK	480	ret = EXCP_INTERRUPT;
bb4ea393	481	}
0e60a699 AG	482	return ret;
0e60a699 AG	483	}
4513d923	484
a4e3ad19	485	bool kvm_arch_stop_on_emulation_error(CPUS390XState *env)
4513d923 GN	486	{
	487	return true;
	488	}
a1b87fe0	489
a4e3ad19	490	int kvm_arch_on_sigbus_vcpu(CPUS390XState env, int code, void addr)
a1b87fe0 JK	491	{
	492	return 1;
	493	}
	494
	495	int kvm_arch_on_sigbus(int code, void *addr)
	496	{
	497	return 1;
	498	}