[mirror_qemu.git] / tests / qtest / tpm-util.c

/*
 * QTest TPM utilities
 *
 * Copyright (c) 2018 IBM Corporation
 * Copyright (c) 2018 Red Hat, Inc.
 *
 * Authors:
 *   Stefan Berger <stefanb@linux.vnet.ibm.com>
 *   Marc-André Lureau <marcandre.lureau@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#include "qemu/osdep.h"

#include "hw/acpi/tpm.h"
#include "libqos/libqtest.h"
#include "tpm-util.h"
#include "qapi/qmp/qdict.h"

void tpm_util_crb_transfer(QTestState *s,
                           const unsigned char *req, size_t req_size,
                           unsigned char *rsp, size_t rsp_size)
{
    uint64_t caddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_CMD_LADDR);
    uint64_t raddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_ADDR);

    qtest_writeb(s, TPM_CRB_ADDR_BASE + A_CRB_LOC_CTRL, 1);

    qtest_memwrite(s, caddr, req, req_size);

    uint32_t sts, start = 1;
    uint64_t end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
    qtest_writel(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START, start);
    while (true) {
        start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START);
        if ((start & 1) == 0) {
            break;
        }
        if (g_get_monotonic_time() >= end_time) {
            break;
        }
    };
    start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START);
    g_assert_cmpint(start & 1, ==, 0);
    sts = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_STS);
    g_assert_cmpint(sts & 1, ==, 0);

    qtest_memread(s, raddr, rsp, rsp_size);
}

void tpm_util_tis_transfer(QTestState *s,
                           const unsigned char *req, size_t req_size,
                           unsigned char *rsp, size_t rsp_size)
{
    uint32_t sts;
    uint16_t bcount;
    size_t i;

    /* request use of locality 0 */
    qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS), TPM_TIS_ACCESS_REQUEST_USE);
    qtest_writel(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_COMMAND_READY);

    sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
    bcount = (sts >> 8) & 0xffff;
    g_assert_cmpint(bcount, >=, req_size);

    /* transmit command */
    for (i = 0; i < req_size; i++) {
        qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO), req[i]);
    }

    /* start processing */
    qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_TPM_GO);

    uint64_t end_time = g_get_monotonic_time() + 50 * G_TIME_SPAN_SECOND;
    do {
        sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
        if ((sts & TPM_TIS_STS_DATA_AVAILABLE) != 0) {
            break;
        }
    } while (g_get_monotonic_time() < end_time);

    sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
    bcount = (sts >> 8) & 0xffff;

    memset(rsp, 0, rsp_size);
    for (i = 0; i < bcount; i++) {
        rsp[i] = qtest_readb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO));
    }

    /* relinquish use of locality 0 */
    qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS),
                 TPM_TIS_ACCESS_ACTIVE_LOCALITY);
}

void tpm_util_startup(QTestState *s, tx_func *tx)
{
    unsigned char buffer[1024];
    static const unsigned char tpm_startup[] =
        "\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x44\x00\x00";
    static const unsigned char tpm_startup_resp[] =
        "\x80\x01\x00\x00\x00\x0a\x00\x00\x00\x00";

    tx(s, tpm_startup, sizeof(tpm_startup), buffer, sizeof(buffer));

    g_assert_cmpmem(buffer, sizeof(tpm_startup_resp),
                    tpm_startup_resp, sizeof(tpm_startup_resp));
}

void tpm_util_pcrextend(QTestState *s, tx_func *tx)
{
    unsigned char buffer[1024];
    static const unsigned char tpm_pcrextend[] =
        "\x80\x02\x00\x00\x00\x41\x00\x00\x01\x82\x00\x00\x00\x0a\x00\x00"
        "\x00\x09\x40\x00\x00\x09\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00"
        "\x0b\x74\x65\x73\x74\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00";

    static const unsigned char tpm_pcrextend_resp[] =
        "\x80\x02\x00\x00\x00\x13\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x01\x00\x00";

    tx(s, tpm_pcrextend, sizeof(tpm_pcrextend), buffer, sizeof(buffer));

    g_assert_cmpmem(buffer, sizeof(tpm_pcrextend_resp),
                    tpm_pcrextend_resp, sizeof(tpm_pcrextend_resp));
}

void tpm_util_pcrread(QTestState *s, tx_func *tx,
                      const unsigned char *exp_resp, size_t exp_resp_size)
{
    unsigned char buffer[1024];
    static const unsigned char tpm_pcrread[] =
        "\x80\x01\x00\x00\x00\x14\x00\x00\x01\x7e\x00\x00\x00\x01\x00\x0b"
        "\x03\x00\x04\x00";

    tx(s, tpm_pcrread, sizeof(tpm_pcrread), buffer, sizeof(buffer));

    /* skip pcrUpdateCounter (14th byte) in comparison */
    g_assert(exp_resp_size >= 15);
    g_assert_cmpmem(buffer, 13, exp_resp, 13);
    g_assert_cmpmem(&buffer[14], exp_resp_size - 14,
                    &exp_resp[14], exp_resp_size - 14);
}

bool tpm_util_swtpm_has_tpm2(void)
{
    bool has_tpm2 = false;
    char *out = NULL;
    static const char *argv[] = {
        "swtpm", "socket", "--help", NULL
    };

    if (!g_spawn_sync(NULL /* working_dir */,
                      (char **)argv,
                      NULL /* envp */,
                      G_SPAWN_SEARCH_PATH,
                      NULL /* child_setup */,
                      NULL /* user_data */,
                      &out,
                      NULL /* err */,
                      NULL /* exit_status */,
                      NULL)) {
        return false;
    }

    if (strstr(out, "--tpm2")) {
        has_tpm2 = true;
    }

    g_free(out);
    return has_tpm2;
}

gboolean tpm_util_swtpm_start(const char *path, GPid *pid,
                              SocketAddress **addr, GError **error)
{
    char *swtpm_argv_tpmstate = g_strdup_printf("dir=%s", path);
    char *swtpm_argv_ctrl = g_strdup_printf("type=unixio,path=%s/sock",
                                            path);
    gchar *swtpm_argv[] = {
        g_strdup("swtpm"), g_strdup("socket"),
        g_strdup("--tpmstate"), swtpm_argv_tpmstate,
        g_strdup("--ctrl"), swtpm_argv_ctrl,
        g_strdup("--tpm2"),
        NULL
    };
    gboolean succ;
    unsigned i;

    *addr = g_new0(SocketAddress, 1);
    (*addr)->type = SOCKET_ADDRESS_TYPE_UNIX;
    (*addr)->u.q_unix.path = g_build_filename(path, "sock", NULL);

    succ = g_spawn_async(NULL, swtpm_argv, NULL, G_SPAWN_SEARCH_PATH,
                         NULL, NULL, pid, error);

    for (i = 0; swtpm_argv[i]; i++) {
        g_free(swtpm_argv[i]);
    }

    return succ;
}

void tpm_util_swtpm_kill(GPid pid)
{
    int n;

    if (!pid) {
        return;
    }

    g_spawn_close_pid(pid);

    n = kill(pid, 0);
    if (n < 0) {
        return;
    }

    kill(pid, SIGKILL);
}

void tpm_util_migrate(QTestState *who, const char *uri)
{
    QDict *rsp;

    rsp = qtest_qmp(who,
                    "{ 'execute': 'migrate', 'arguments': { 'uri': %s } }",
                    uri);
    g_assert(qdict_haskey(rsp, "return"));
    qobject_unref(rsp);
}

void tpm_util_wait_for_migration_complete(QTestState *who)
{
    while (true) {
        QDict *rsp;
        QDict *rsp_return;
        bool completed;
        const char *status;

        rsp = qtest_qmp(who, "{ 'execute': 'query-migrate' }");
        g_assert(qdict_haskey(rsp, "return"));
        rsp_return = qdict_get_qdict(rsp, "return");

        g_assert(!qdict_haskey(rsp_return, "error"));
        status = qdict_get_str(rsp_return, "status");
        completed = strcmp(status, "completed") == 0;
        g_assert_cmpstr(status, !=,  "failed");
        qobject_unref(rsp_return);
        if (completed) {
            return;
        }
        usleep(1000);
    }
}

void tpm_util_migration_start_qemu(QTestState **src_qemu,
                                   QTestState **dst_qemu,
                                   SocketAddress *src_tpm_addr,
                                   SocketAddress *dst_tpm_addr,
                                   const char *miguri,
                                   const char *ifmodel,
                                   const char *machine_options)
{
    char *src_qemu_args, *dst_qemu_args;

    src_qemu_args = g_strdup_printf(
        "%s "
        "-chardev socket,id=chr,path=%s "
        "-tpmdev emulator,id=dev,chardev=chr "
        "-device %s,tpmdev=dev ",
        machine_options ? : "", src_tpm_addr->u.q_unix.path, ifmodel);

    *src_qemu = qtest_init(src_qemu_args);

    dst_qemu_args = g_strdup_printf(
        "%s "
        "-chardev socket,id=chr,path=%s "
        "-tpmdev emulator,id=dev,chardev=chr "
        "-device %s,tpmdev=dev "
        "-incoming %s",
        machine_options ? : "",
        dst_tpm_addr->u.q_unix.path,
        ifmodel, miguri);

    *dst_qemu = qtest_init(dst_qemu_args);

    free(src_qemu_args);
    free(dst_qemu_args);
}
Commit	Line	Data
b21373d0 SB	1	/*
	2	* QTest TPM utilities
	3	*
	4	* Copyright (c) 2018 IBM Corporation
	5	* Copyright (c) 2018 Red Hat, Inc.
	6	*
	7	* Authors:
	8	* Stefan Berger <stefanb@linux.vnet.ibm.com>
	9	* Marc-André Lureau <marcandre.lureau@redhat.com>
	10	*
	11	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	12	* See the COPYING file in the top-level directory.
	13	*/
	14
	15	#include "qemu/osdep.h"
	16
	17	#include "hw/acpi/tpm.h"
a2ce7dbd	18	#include "libqos/libqtest.h"
b21373d0	19	#include "tpm-util.h"
b1e4b7c6 SB	20	#include "qapi/qmp/qdict.h"
b1e4b7c6 SB	21
b21373d0 SB	22	void tpm_util_crb_transfer(QTestState *s,
	23	const unsigned char *req, size_t req_size,
	24	unsigned char *rsp, size_t rsp_size)
	25	{
	26	uint64_t caddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_CMD_LADDR);
	27	uint64_t raddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_ADDR);
	28
	29	qtest_writeb(s, TPM_CRB_ADDR_BASE + A_CRB_LOC_CTRL, 1);
	30
	31	qtest_memwrite(s, caddr, req, req_size);
	32
	33	uint32_t sts, start = 1;
	34	uint64_t end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
	35	qtest_writel(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START, start);
	36	while (true) {
	37	start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START);
	38	if ((start & 1) == 0) {
	39	break;
	40	}
	41	if (g_get_monotonic_time() >= end_time) {
	42	break;
	43	}
	44	};
	45	start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START);
	46	g_assert_cmpint(start & 1, ==, 0);
	47	sts = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_STS);
	48	g_assert_cmpint(sts & 1, ==, 0);
	49
	50	qtest_memread(s, raddr, rsp, rsp_size);
	51	}
	52
70663851 SB	53	void tpm_util_tis_transfer(QTestState *s,
	54	const unsigned char *req, size_t req_size,
	55	unsigned char *rsp, size_t rsp_size)
	56	{
	57	uint32_t sts;
	58	uint16_t bcount;
	59	size_t i;
	60
	61	/* request use of locality 0 */
	62	qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS), TPM_TIS_ACCESS_REQUEST_USE);
	63	qtest_writel(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_COMMAND_READY);
	64
	65	sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
	66	bcount = (sts >> 8) & 0xffff;
	67	g_assert_cmpint(bcount, >=, req_size);
	68
	69	/* transmit command */
	70	for (i = 0; i < req_size; i++) {
	71	qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO), req[i]);
	72	}
	73
	74	/* start processing */
	75	qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_TPM_GO);
	76
	77	uint64_t end_time = g_get_monotonic_time() + 50 * G_TIME_SPAN_SECOND;
	78	do {
	79	sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
	80	if ((sts & TPM_TIS_STS_DATA_AVAILABLE) != 0) {
	81	break;
	82	}
	83	} while (g_get_monotonic_time() < end_time);
	84
	85	sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS));
	86	bcount = (sts >> 8) & 0xffff;
	87
	88	memset(rsp, 0, rsp_size);
	89	for (i = 0; i < bcount; i++) {
	90	rsp[i] = qtest_readb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO));
	91	}
	92
	93	/* relinquish use of locality 0 */
	94	qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS),
	95	TPM_TIS_ACCESS_ACTIVE_LOCALITY);
	96	}
	97
b21373d0 SB	98	void tpm_util_startup(QTestState s, tx_func tx)
	99	{
	100	unsigned char buffer[1024];
ed943cc9	101	static const unsigned char tpm_startup[] =
b21373d0	102	"\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x44\x00\x00";
ed943cc9	103	static const unsigned char tpm_startup_resp[] =
b21373d0 SB	104	"\x80\x01\x00\x00\x00\x0a\x00\x00\x00\x00";
	105
	106	tx(s, tpm_startup, sizeof(tpm_startup), buffer, sizeof(buffer));
	107
	108	g_assert_cmpmem(buffer, sizeof(tpm_startup_resp),
	109	tpm_startup_resp, sizeof(tpm_startup_resp));
	110	}
	111
	112	void tpm_util_pcrextend(QTestState s, tx_func tx)
	113	{
	114	unsigned char buffer[1024];
ed943cc9	115	static const unsigned char tpm_pcrextend[] =
b21373d0 SB	116	"\x80\x02\x00\x00\x00\x41\x00\x00\x01\x82\x00\x00\x00\x0a\x00\x00"
	117	"\x00\x09\x40\x00\x00\x09\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00"
	118	"\x0b\x74\x65\x73\x74\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
	119	"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
	120	"\x00";
	121
ed943cc9	122	static const unsigned char tpm_pcrextend_resp[] =
b21373d0 SB	123	"\x80\x02\x00\x00\x00\x13\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
	124	"\x01\x00\x00";
	125
	126	tx(s, tpm_pcrextend, sizeof(tpm_pcrextend), buffer, sizeof(buffer));
	127
	128	g_assert_cmpmem(buffer, sizeof(tpm_pcrextend_resp),
	129	tpm_pcrextend_resp, sizeof(tpm_pcrextend_resp));
	130	}
	131
	132	void tpm_util_pcrread(QTestState s, tx_func tx,
	133	const unsigned char *exp_resp, size_t exp_resp_size)
	134	{
	135	unsigned char buffer[1024];
ed943cc9	136	static const unsigned char tpm_pcrread[] =
b21373d0 SB	137	"\x80\x01\x00\x00\x00\x14\x00\x00\x01\x7e\x00\x00\x00\x01\x00\x0b"
	138	"\x03\x00\x04\x00";
	139
	140	tx(s, tpm_pcrread, sizeof(tpm_pcrread), buffer, sizeof(buffer));
	141
df8a7568 SB	142	/* skip pcrUpdateCounter (14th byte) in comparison */
	143	g_assert(exp_resp_size >= 15);
	144	g_assert_cmpmem(buffer, 13, exp_resp, 13);
	145	g_assert_cmpmem(&buffer[14], exp_resp_size - 14,
	146	&exp_resp[14], exp_resp_size - 14);
b21373d0 SB	147	}
b21373d0 SB	148
e2f246a5	149	bool tpm_util_swtpm_has_tpm2(void)
b21373d0	150	{
c1d99200 MAL	151	bool has_tpm2 = false;
	152	char *out = NULL;
	153	static const char *argv[] = {
	154	"swtpm", "socket", "--help", NULL
b21373d0 SB	155	};
b21373d0 SB	156
c1d99200 MAL	157	if (!g_spawn_sync(NULL /* working_dir */,
	158	(char **)argv,
	159	NULL /* envp */,
	160	G_SPAWN_SEARCH_PATH,
	161	NULL /* child_setup */,
	162	NULL /* user_data */,
	163	&out,
	164	NULL /* err */,
	165	NULL /* exit_status */,
	166	NULL)) {
	167	return false;
b21373d0 SB	168	}
b21373d0 SB	169
c1d99200 MAL	170	if (strstr(out, "--tpm2")) {
c1d99200 MAL	171	has_tpm2 = true;
b21373d0 SB	172	}
b21373d0 SB	173
c1d99200 MAL	174	g_free(out);
c1d99200 MAL	175	return has_tpm2;
b21373d0 SB	176	}
	177
	178	gboolean tpm_util_swtpm_start(const char path, GPid pid,
	179	SocketAddress addr, GError error)
	180	{
	181	char *swtpm_argv_tpmstate = g_strdup_printf("dir=%s", path);
	182	char *swtpm_argv_ctrl = g_strdup_printf("type=unixio,path=%s/sock",
	183	path);
	184	gchar *swtpm_argv[] = {
	185	g_strdup("swtpm"), g_strdup("socket"),
	186	g_strdup("--tpmstate"), swtpm_argv_tpmstate,
	187	g_strdup("--ctrl"), swtpm_argv_ctrl,
	188	g_strdup("--tpm2"),
	189	NULL
	190	};
	191	gboolean succ;
	192	unsigned i;
	193
b21373d0 SB	194	*addr = g_new0(SocketAddress, 1);
	195	(*addr)->type = SOCKET_ADDRESS_TYPE_UNIX;
	196	(*addr)->u.q_unix.path = g_build_filename(path, "sock", NULL);
	197
	198	succ = g_spawn_async(NULL, swtpm_argv, NULL, G_SPAWN_SEARCH_PATH,
	199	NULL, NULL, pid, error);
	200
b21373d0 SB	201	for (i = 0; swtpm_argv[i]; i++) {
	202	g_free(swtpm_argv[i]);
	203	}
	204
	205	return succ;
	206	}
	207
	208	void tpm_util_swtpm_kill(GPid pid)
	209	{
	210	int n;
	211
	212	if (!pid) {
	213	return;
	214	}
	215
	216	g_spawn_close_pid(pid);
	217
	218	n = kill(pid, 0);
	219	if (n < 0) {
	220	return;
	221	}
	222
	223	kill(pid, SIGKILL);
	224	}
b1e4b7c6 SB	225
	226	void tpm_util_migrate(QTestState who, const char uri)
	227	{
	228	QDict *rsp;
b1e4b7c6	229
015715f5 MA	230	rsp = qtest_qmp(who,
	231	"{ 'execute': 'migrate', 'arguments': { 'uri': %s } }",
	232	uri);
b1e4b7c6 SB	233	g_assert(qdict_haskey(rsp, "return"));
	234	qobject_unref(rsp);
	235	}
	236
b1e4b7c6 SB	237	void tpm_util_wait_for_migration_complete(QTestState *who)
	238	{
	239	while (true) {
bb1a5b97	240	QDict *rsp;
3cd46d42	241	QDict *rsp_return;
b1e4b7c6 SB	242	bool completed;
	243	const char *status;
	244
bb1a5b97 ML	245	rsp = qtest_qmp(who, "{ 'execute': 'query-migrate' }");
	246	g_assert(qdict_haskey(rsp, "return"));
	247	rsp_return = qdict_get_qdict(rsp, "return");
	248
	249	g_assert(!qdict_haskey(rsp_return, "error"));
b1e4b7c6 SB	250	status = qdict_get_str(rsp_return, "status");
	251	completed = strcmp(status, "completed") == 0;
	252	g_assert_cmpstr(status, !=, "failed");
3cd46d42	253	qobject_unref(rsp_return);
b1e4b7c6 SB	254	if (completed) {
	255	return;
	256	}
	257	usleep(1000);
	258	}
	259	}
	260
	261	void tpm_util_migration_start_qemu(QTestState **src_qemu,
	262	QTestState **dst_qemu,
	263	SocketAddress *src_tpm_addr,
	264	SocketAddress *dst_tpm_addr,
ea71a336	265	const char *miguri,
551cabdf EA	266	const char *ifmodel,
551cabdf EA	267	const char *machine_options)
b1e4b7c6 SB	268	{
	269	char src_qemu_args, dst_qemu_args;
	270
	271	src_qemu_args = g_strdup_printf(
551cabdf	272	"%s "
b1e4b7c6 SB	273	"-chardev socket,id=chr,path=%s "
b1e4b7c6 SB	274	"-tpmdev emulator,id=dev,chardev=chr "
ea71a336	275	"-device %s,tpmdev=dev ",
551cabdf	276	machine_options ? : "", src_tpm_addr->u.q_unix.path, ifmodel);
b1e4b7c6 SB	277
	278	*src_qemu = qtest_init(src_qemu_args);
	279
	280	dst_qemu_args = g_strdup_printf(
551cabdf	281	"%s "
b1e4b7c6 SB	282	"-chardev socket,id=chr,path=%s "
b1e4b7c6 SB	283	"-tpmdev emulator,id=dev,chardev=chr "
ea71a336	284	"-device %s,tpmdev=dev "
b1e4b7c6	285	"-incoming %s",
551cabdf	286	machine_options ? : "",
b1e4b7c6	287	dst_tpm_addr->u.q_unix.path,
ea71a336	288	ifmodel, miguri);
b1e4b7c6 SB	289
	290	*dst_qemu = qtest_init(dst_qemu_args);
	291
	292	free(src_qemu_args);
	293	free(dst_qemu_args);
	294	}