1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2016 iXsystems Inc. 5 * All rights reserved. 6 * 7 * This software was developed by Jakub Klama <jceel@FreeBSD.org> 8 * under sponsorship from iXsystems Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer 15 * in this position and unchanged. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright 2018 Joyent, Inc. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #ifndef WITHOUT_CAPSICUM 42 #include <sys/capsicum.h> 43 #endif 44 #include <sys/linker_set.h> 45 #include <sys/uio.h> 46 #include <sys/types.h> 47 #include <sys/socket.h> 48 #include <sys/un.h> 49 50 #ifndef WITHOUT_CAPSICUM 51 #include <capsicum_helpers.h> 52 #endif 53 #include <err.h> 54 #include <errno.h> 55 #include <fcntl.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <stdbool.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <assert.h> 62 #include <pthread.h> 63 #include <libgen.h> 64 #include <sysexits.h> 65 66 #include "bhyverun.h" 67 #include "debug.h" 68 #include "pci_emul.h" 69 #include "virtio.h" 70 #include "mevent.h" 71 #include "sockstream.h" 72 73 #define VTCON_RINGSZ 64 74 #define VTCON_MAXPORTS 16 75 #define VTCON_MAXQ (VTCON_MAXPORTS * 2 + 2) 76 77 #define VTCON_DEVICE_READY 0 78 #define VTCON_DEVICE_ADD 1 79 #define VTCON_DEVICE_REMOVE 2 80 #define VTCON_PORT_READY 3 81 #define VTCON_CONSOLE_PORT 4 82 #define VTCON_CONSOLE_RESIZE 5 83 #define VTCON_PORT_OPEN 6 84 #define VTCON_PORT_NAME 7 85 86 #define VTCON_F_SIZE 0 87 #define VTCON_F_MULTIPORT 1 88 #define VTCON_F_EMERG_WRITE 2 89 #define VTCON_S_HOSTCAPS \ 90 (VTCON_F_SIZE | VTCON_F_MULTIPORT | VTCON_F_EMERG_WRITE) 91 92 static int pci_vtcon_debug; 93 #define DPRINTF(params) if (pci_vtcon_debug) PRINTLN params 94 #define WPRINTF(params) PRINTLN params 95 96 struct pci_vtcon_softc; 97 struct pci_vtcon_port; 98 struct pci_vtcon_config; 99 typedef void (pci_vtcon_cb_t)(struct pci_vtcon_port *, void *, struct iovec *, 100 int); 101 102 struct pci_vtcon_port { 103 struct pci_vtcon_softc * vsp_sc; 104 int vsp_id; 105 const char * vsp_name; 106 bool vsp_enabled; 107 bool vsp_console; 108 bool vsp_rx_ready; 109 bool vsp_open; 110 int vsp_rxq; 111 int vsp_txq; 112 void * vsp_arg; 113 pci_vtcon_cb_t * vsp_cb; 114 }; 115 116 struct pci_vtcon_sock 117 { 118 struct pci_vtcon_port * vss_port; 119 const char * vss_path; 120 struct mevent * vss_server_evp; 121 struct mevent * vss_conn_evp; 122 int vss_server_fd; 123 int vss_conn_fd; 124 bool vss_open; 125 }; 126 127 struct pci_vtcon_softc { 128 struct virtio_softc vsc_vs; 129 struct vqueue_info vsc_queues[VTCON_MAXQ]; 130 pthread_mutex_t vsc_mtx; 131 uint64_t vsc_cfg; 132 uint64_t vsc_features; 133 char * vsc_rootdir; 134 int vsc_kq; 135 int vsc_nports; 136 bool vsc_ready; 137 struct pci_vtcon_port vsc_control_port; 138 struct pci_vtcon_port vsc_ports[VTCON_MAXPORTS]; 139 struct pci_vtcon_config *vsc_config; 140 }; 141 142 struct pci_vtcon_config { 143 uint16_t cols; 144 uint16_t rows; 145 uint32_t max_nr_ports; 146 uint32_t emerg_wr; 147 } __attribute__((packed)); 148 149 struct pci_vtcon_control { 150 uint32_t id; 151 uint16_t event; 152 uint16_t value; 153 } __attribute__((packed)); 154 155 struct pci_vtcon_console_resize { 156 uint16_t cols; 157 uint16_t rows; 158 } __attribute__((packed)); 159 160 static void pci_vtcon_reset(void *); 161 static void pci_vtcon_notify_rx(void *, struct vqueue_info *); 162 static void pci_vtcon_notify_tx(void *, struct vqueue_info *); 163 static int pci_vtcon_cfgread(void *, int, int, uint32_t *); 164 static int pci_vtcon_cfgwrite(void *, int, int, uint32_t); 165 static void pci_vtcon_neg_features(void *, uint64_t); 166 static void pci_vtcon_sock_accept(int, enum ev_type, void *); 167 static void pci_vtcon_sock_rx(int, enum ev_type, void *); 168 static void pci_vtcon_sock_tx(struct pci_vtcon_port *, void *, struct iovec *, 169 int); 170 static void pci_vtcon_control_send(struct pci_vtcon_softc *, 171 struct pci_vtcon_control *, const void *, size_t); 172 static void pci_vtcon_announce_port(struct pci_vtcon_port *); 173 static void pci_vtcon_open_port(struct pci_vtcon_port *, bool); 174 175 static struct virtio_consts vtcon_vi_consts = { 176 "vtcon", /* our name */ 177 VTCON_MAXQ, /* we support VTCON_MAXQ virtqueues */ 178 sizeof(struct pci_vtcon_config), /* config reg size */ 179 pci_vtcon_reset, /* reset */ 180 NULL, /* device-wide qnotify */ 181 pci_vtcon_cfgread, /* read virtio config */ 182 pci_vtcon_cfgwrite, /* write virtio config */ 183 pci_vtcon_neg_features, /* apply negotiated features */ 184 VTCON_S_HOSTCAPS, /* our capabilities */ 185 }; 186 187 188 static void 189 pci_vtcon_reset(void *vsc) 190 { 191 struct pci_vtcon_softc *sc; 192 193 sc = vsc; 194 195 DPRINTF(("vtcon: device reset requested!")); 196 vi_reset_dev(&sc->vsc_vs); 197 } 198 199 static void 200 pci_vtcon_neg_features(void *vsc, uint64_t negotiated_features) 201 { 202 struct pci_vtcon_softc *sc = vsc; 203 204 sc->vsc_features = negotiated_features; 205 } 206 207 static int 208 pci_vtcon_cfgread(void *vsc, int offset, int size, uint32_t *retval) 209 { 210 struct pci_vtcon_softc *sc = vsc; 211 void *ptr; 212 213 ptr = (uint8_t *)sc->vsc_config + offset; 214 memcpy(retval, ptr, size); 215 return (0); 216 } 217 218 static int 219 pci_vtcon_cfgwrite(void *vsc, int offset, int size, uint32_t val) 220 { 221 222 return (0); 223 } 224 225 static inline struct pci_vtcon_port * 226 pci_vtcon_vq_to_port(struct pci_vtcon_softc *sc, struct vqueue_info *vq) 227 { 228 uint16_t num = vq->vq_num; 229 230 if (num == 0 || num == 1) 231 return (&sc->vsc_ports[0]); 232 233 if (num == 2 || num == 3) 234 return (&sc->vsc_control_port); 235 236 return (&sc->vsc_ports[(num / 2) - 1]); 237 } 238 239 static inline struct vqueue_info * 240 pci_vtcon_port_to_vq(struct pci_vtcon_port *port, bool tx_queue) 241 { 242 int qnum; 243 244 qnum = tx_queue ? port->vsp_txq : port->vsp_rxq; 245 return (&port->vsp_sc->vsc_queues[qnum]); 246 } 247 248 static struct pci_vtcon_port * 249 pci_vtcon_port_add(struct pci_vtcon_softc *sc, const char *name, 250 pci_vtcon_cb_t *cb, void *arg) 251 { 252 struct pci_vtcon_port *port; 253 254 if (sc->vsc_nports == VTCON_MAXPORTS) { 255 errno = EBUSY; 256 return (NULL); 257 } 258 259 port = &sc->vsc_ports[sc->vsc_nports++]; 260 port->vsp_id = sc->vsc_nports - 1; 261 port->vsp_sc = sc; 262 port->vsp_name = name; 263 port->vsp_cb = cb; 264 port->vsp_arg = arg; 265 266 if (port->vsp_id == 0) { 267 /* port0 */ 268 port->vsp_txq = 0; 269 port->vsp_rxq = 1; 270 } else { 271 port->vsp_txq = sc->vsc_nports * 2; 272 port->vsp_rxq = port->vsp_txq + 1; 273 } 274 275 port->vsp_enabled = true; 276 return (port); 277 } 278 279 static int 280 pci_vtcon_sock_add(struct pci_vtcon_softc *sc, const char *name, 281 const char *path) 282 { 283 struct pci_vtcon_sock *sock; 284 #ifdef __FreeBSD__ 285 struct sockaddr_un sun; 286 char *pathcopy; 287 #else 288 /* Our compiler #defines 'sun' as '1'. Awesome. */ 289 struct sockaddr_un addr; 290 #endif 291 int s = -1, fd = -1, error = 0; 292 #ifndef WITHOUT_CAPSICUM 293 cap_rights_t rights; 294 #endif 295 296 sock = calloc(1, sizeof(struct pci_vtcon_sock)); 297 if (sock == NULL) { 298 error = -1; 299 goto out; 300 } 301 302 s = socket(AF_UNIX, SOCK_STREAM, 0); 303 if (s < 0) { 304 error = -1; 305 goto out; 306 } 307 308 #ifdef __FreeBSD__ 309 pathcopy = strdup(path); 310 if (pathcopy == NULL) { 311 error = -1; 312 goto out; 313 } 314 315 fd = open(dirname(pathcopy), O_RDONLY | O_DIRECTORY); 316 if (fd < 0) { 317 free(pathcopy); 318 error = -1; 319 goto out; 320 } 321 322 sun.sun_family = AF_UNIX; 323 sun.sun_len = sizeof(struct sockaddr_un); 324 strcpy(pathcopy, path); 325 strlcpy(sun.sun_path, basename(pathcopy), sizeof(sun.sun_path)); 326 free(pathcopy); 327 328 if (bindat(fd, s, (struct sockaddr *)&sun, sun.sun_len) < 0) { 329 error = -1; 330 goto out; 331 } 332 #else /* __FreeBSD__ */ 333 /* Do a simple bind rather than the FreeBSD bindat() */ 334 addr.sun_family = AF_UNIX; 335 (void) strlcpy(addr.sun_path, path, sizeof (addr.sun_path)); 336 if (bind(fd, (struct sockaddr *)&addr, sizeof (addr)) < 0) { 337 error = -1; 338 goto out; 339 } 340 #endif /* __FreeBSD__ */ 341 342 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) { 343 error = -1; 344 goto out; 345 } 346 347 if (listen(s, 1) < 0) { 348 error = -1; 349 goto out; 350 } 351 352 #ifndef WITHOUT_CAPSICUM 353 cap_rights_init(&rights, CAP_ACCEPT, CAP_EVENT, CAP_READ, CAP_WRITE); 354 if (caph_rights_limit(s, &rights) == -1) 355 errx(EX_OSERR, "Unable to apply rights for sandbox"); 356 #endif 357 358 sock->vss_port = pci_vtcon_port_add(sc, name, pci_vtcon_sock_tx, sock); 359 if (sock->vss_port == NULL) { 360 error = -1; 361 goto out; 362 } 363 364 sock->vss_open = false; 365 sock->vss_conn_fd = -1; 366 sock->vss_server_fd = s; 367 sock->vss_server_evp = mevent_add(s, EVF_READ, pci_vtcon_sock_accept, 368 sock); 369 370 if (sock->vss_server_evp == NULL) { 371 error = -1; 372 goto out; 373 } 374 375 out: 376 if (fd != -1) 377 close(fd); 378 379 if (error != 0) { 380 if (s != -1) 381 close(s); 382 free(sock); 383 } 384 385 return (error); 386 } 387 388 static void 389 pci_vtcon_sock_accept(int fd __unused, enum ev_type t __unused, void *arg) 390 { 391 struct pci_vtcon_sock *sock = (struct pci_vtcon_sock *)arg; 392 int s; 393 394 s = accept(sock->vss_server_fd, NULL, NULL); 395 if (s < 0) 396 return; 397 398 if (sock->vss_open) { 399 close(s); 400 return; 401 } 402 403 sock->vss_open = true; 404 sock->vss_conn_fd = s; 405 sock->vss_conn_evp = mevent_add(s, EVF_READ, pci_vtcon_sock_rx, sock); 406 407 pci_vtcon_open_port(sock->vss_port, true); 408 } 409 410 static void 411 pci_vtcon_sock_rx(int fd __unused, enum ev_type t __unused, void *arg) 412 { 413 struct pci_vtcon_port *port; 414 struct pci_vtcon_sock *sock = (struct pci_vtcon_sock *)arg; 415 struct vqueue_info *vq; 416 struct iovec iov; 417 static char dummybuf[2048]; 418 int len, n; 419 uint16_t idx; 420 421 port = sock->vss_port; 422 vq = pci_vtcon_port_to_vq(port, true); 423 424 if (!sock->vss_open || !port->vsp_rx_ready) { 425 len = read(sock->vss_conn_fd, dummybuf, sizeof(dummybuf)); 426 if (len == 0) 427 goto close; 428 429 return; 430 } 431 432 if (!vq_has_descs(vq)) { 433 len = read(sock->vss_conn_fd, dummybuf, sizeof(dummybuf)); 434 vq_endchains(vq, 1); 435 if (len == 0) 436 goto close; 437 438 return; 439 } 440 441 do { 442 n = vq_getchain(vq, &idx, &iov, 1, NULL); 443 len = readv(sock->vss_conn_fd, &iov, n); 444 445 if (len == 0 || (len < 0 && errno == EWOULDBLOCK)) { 446 vq_retchains(vq, 1); 447 vq_endchains(vq, 0); 448 if (len == 0) 449 goto close; 450 451 return; 452 } 453 454 vq_relchain(vq, idx, len); 455 } while (vq_has_descs(vq)); 456 457 vq_endchains(vq, 1); 458 459 close: 460 mevent_delete_close(sock->vss_conn_evp); 461 sock->vss_conn_fd = -1; 462 sock->vss_open = false; 463 } 464 465 static void 466 pci_vtcon_sock_tx(struct pci_vtcon_port *port, void *arg, struct iovec *iov, 467 int niov) 468 { 469 struct pci_vtcon_sock *sock; 470 #ifdef __FreeBSD__ 471 int i, ret; 472 #else 473 int i, ret = 0; 474 #endif 475 476 sock = (struct pci_vtcon_sock *)arg; 477 478 if (sock->vss_conn_fd == -1) 479 return; 480 481 for (i = 0; i < niov; i++) { 482 ret = stream_write(sock->vss_conn_fd, iov[i].iov_base, 483 iov[i].iov_len); 484 if (ret <= 0) 485 break; 486 } 487 488 if (ret <= 0) { 489 mevent_delete_close(sock->vss_conn_evp); 490 sock->vss_conn_fd = -1; 491 sock->vss_open = false; 492 } 493 } 494 495 static void 496 pci_vtcon_control_tx(struct pci_vtcon_port *port, void *arg, struct iovec *iov, 497 int niov) 498 { 499 struct pci_vtcon_softc *sc; 500 struct pci_vtcon_port *tmp; 501 struct pci_vtcon_control resp, *ctrl; 502 int i; 503 504 assert(niov == 1); 505 506 sc = port->vsp_sc; 507 ctrl = (struct pci_vtcon_control *)iov->iov_base; 508 509 switch (ctrl->event) { 510 case VTCON_DEVICE_READY: 511 sc->vsc_ready = true; 512 /* set port ready events for registered ports */ 513 for (i = 0; i < VTCON_MAXPORTS; i++) { 514 tmp = &sc->vsc_ports[i]; 515 if (tmp->vsp_enabled) 516 pci_vtcon_announce_port(tmp); 517 518 if (tmp->vsp_open) 519 pci_vtcon_open_port(tmp, true); 520 } 521 break; 522 523 case VTCON_PORT_READY: 524 if (ctrl->id >= sc->vsc_nports) { 525 WPRINTF(("VTCON_PORT_READY event for unknown port %d", 526 ctrl->id)); 527 return; 528 } 529 530 tmp = &sc->vsc_ports[ctrl->id]; 531 if (tmp->vsp_console) { 532 resp.event = VTCON_CONSOLE_PORT; 533 resp.id = ctrl->id; 534 resp.value = 1; 535 pci_vtcon_control_send(sc, &resp, NULL, 0); 536 } 537 break; 538 } 539 } 540 541 static void 542 pci_vtcon_announce_port(struct pci_vtcon_port *port) 543 { 544 struct pci_vtcon_control event; 545 546 event.id = port->vsp_id; 547 event.event = VTCON_DEVICE_ADD; 548 event.value = 1; 549 pci_vtcon_control_send(port->vsp_sc, &event, NULL, 0); 550 551 event.event = VTCON_PORT_NAME; 552 pci_vtcon_control_send(port->vsp_sc, &event, port->vsp_name, 553 strlen(port->vsp_name)); 554 } 555 556 static void 557 pci_vtcon_open_port(struct pci_vtcon_port *port, bool open) 558 { 559 struct pci_vtcon_control event; 560 561 if (!port->vsp_sc->vsc_ready) { 562 port->vsp_open = true; 563 return; 564 } 565 566 event.id = port->vsp_id; 567 event.event = VTCON_PORT_OPEN; 568 event.value = (int)open; 569 pci_vtcon_control_send(port->vsp_sc, &event, NULL, 0); 570 } 571 572 static void 573 pci_vtcon_control_send(struct pci_vtcon_softc *sc, 574 struct pci_vtcon_control *ctrl, const void *payload, size_t len) 575 { 576 struct vqueue_info *vq; 577 struct iovec iov; 578 uint16_t idx; 579 int n; 580 581 vq = pci_vtcon_port_to_vq(&sc->vsc_control_port, true); 582 583 if (!vq_has_descs(vq)) 584 return; 585 586 n = vq_getchain(vq, &idx, &iov, 1, NULL); 587 588 assert(n == 1); 589 590 memcpy(iov.iov_base, ctrl, sizeof(struct pci_vtcon_control)); 591 if (payload != NULL && len > 0) 592 memcpy(iov.iov_base + sizeof(struct pci_vtcon_control), 593 payload, len); 594 595 vq_relchain(vq, idx, sizeof(struct pci_vtcon_control) + len); 596 vq_endchains(vq, 1); 597 } 598 599 600 static void 601 pci_vtcon_notify_tx(void *vsc, struct vqueue_info *vq) 602 { 603 struct pci_vtcon_softc *sc; 604 struct pci_vtcon_port *port; 605 struct iovec iov[1]; 606 uint16_t idx, n; 607 uint16_t flags[8]; 608 609 sc = vsc; 610 port = pci_vtcon_vq_to_port(sc, vq); 611 612 while (vq_has_descs(vq)) { 613 n = vq_getchain(vq, &idx, iov, 1, flags); 614 assert(n >= 1); 615 if (port != NULL) 616 port->vsp_cb(port, port->vsp_arg, iov, 1); 617 618 /* 619 * Release this chain and handle more 620 */ 621 vq_relchain(vq, idx, 0); 622 } 623 vq_endchains(vq, 1); /* Generate interrupt if appropriate. */ 624 } 625 626 static void 627 pci_vtcon_notify_rx(void *vsc, struct vqueue_info *vq) 628 { 629 struct pci_vtcon_softc *sc; 630 struct pci_vtcon_port *port; 631 632 sc = vsc; 633 port = pci_vtcon_vq_to_port(sc, vq); 634 635 if (!port->vsp_rx_ready) { 636 port->vsp_rx_ready = 1; 637 vq_kick_disable(vq); 638 } 639 } 640 641 static int 642 pci_vtcon_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) 643 { 644 struct pci_vtcon_softc *sc; 645 char *portname = NULL; 646 char *portpath = NULL; 647 char *opt; 648 int i; 649 650 sc = calloc(1, sizeof(struct pci_vtcon_softc)); 651 sc->vsc_config = calloc(1, sizeof(struct pci_vtcon_config)); 652 sc->vsc_config->max_nr_ports = VTCON_MAXPORTS; 653 sc->vsc_config->cols = 80; 654 sc->vsc_config->rows = 25; 655 656 vi_softc_linkup(&sc->vsc_vs, &vtcon_vi_consts, sc, pi, sc->vsc_queues); 657 sc->vsc_vs.vs_mtx = &sc->vsc_mtx; 658 659 for (i = 0; i < VTCON_MAXQ; i++) { 660 sc->vsc_queues[i].vq_qsize = VTCON_RINGSZ; 661 sc->vsc_queues[i].vq_notify = i % 2 == 0 662 ? pci_vtcon_notify_rx 663 : pci_vtcon_notify_tx; 664 } 665 666 /* initialize config space */ 667 pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_CONSOLE); 668 pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR); 669 pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_SIMPLECOMM); 670 pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_CONSOLE); 671 pci_set_cfgdata16(pi, PCIR_SUBVEND_0, VIRTIO_VENDOR); 672 673 if (vi_intr_init(&sc->vsc_vs, 1, fbsdrun_virtio_msix())) 674 return (1); 675 vi_set_io_bar(&sc->vsc_vs, 0); 676 677 /* create control port */ 678 sc->vsc_control_port.vsp_sc = sc; 679 sc->vsc_control_port.vsp_txq = 2; 680 sc->vsc_control_port.vsp_rxq = 3; 681 sc->vsc_control_port.vsp_cb = pci_vtcon_control_tx; 682 sc->vsc_control_port.vsp_enabled = true; 683 684 while ((opt = strsep(&opts, ",")) != NULL) { 685 portname = strsep(&opt, "="); 686 portpath = opt; 687 688 /* create port */ 689 if (pci_vtcon_sock_add(sc, portname, portpath) < 0) { 690 EPRINTLN("cannot create port %s: %s", 691 portname, strerror(errno)); 692 return (1); 693 } 694 } 695 696 return (0); 697 } 698 699 struct pci_devemu pci_de_vcon = { 700 .pe_emu = "virtio-console", 701 .pe_init = pci_vtcon_init, 702 .pe_barwrite = vi_pci_write, 703 .pe_barread = vi_pci_read 704 }; 705 PCI_EMUL_SET(pci_de_vcon); 706