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Diffstat (limited to 'usr.sbin/bhyve/consport.c')
-rw-r--r-- | usr.sbin/bhyve/consport.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/usr.sbin/bhyve/consport.c b/usr.sbin/bhyve/consport.c new file mode 100644 index 0000000..3915b6d --- /dev/null +++ b/usr.sbin/bhyve/consport.c @@ -0,0 +1,140 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/select.h> + +#include <stdio.h> +#include <stdlib.h> +#include <termios.h> +#include <unistd.h> +#include <stdbool.h> + +#include "inout.h" + +#define BVM_CONSOLE_PORT 0x220 +#define BVM_CONS_SIG ('b' << 8 | 'v') + +static struct termios tio_orig, tio_new; + +static void +ttyclose(void) +{ + tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig); +} + +static void +ttyopen(void) +{ + tcgetattr(STDIN_FILENO, &tio_orig); + + cfmakeraw(&tio_new); + tcsetattr(STDIN_FILENO, TCSANOW, &tio_new); + + atexit(ttyclose); +} + +static bool +tty_char_available(void) +{ + fd_set rfds; + struct timeval tv; + + FD_ZERO(&rfds); + FD_SET(STDIN_FILENO, &rfds); + tv.tv_sec = 0; + tv.tv_usec = 0; + if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0) { + return (true); + } else { + return (false); + } +} + +static int +ttyread(void) +{ + char rb; + + if (tty_char_available()) { + read(STDIN_FILENO, &rb, 1); + return (rb & 0xff); + } else { + return (-1); + } +} + +static void +ttywrite(unsigned char wb) +{ + (void) write(STDOUT_FILENO, &wb, 1); +} + +static int +console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + static int opened; + + if (bytes == 2 && in) { + *eax = BVM_CONS_SIG; + return (0); + } + + if (bytes != 4) + return (-1); + + if (!opened) { + ttyopen(); + opened = 1; + } + + if (in) + *eax = ttyread(); + else + ttywrite(*eax); + + return (0); +} + +static struct inout_port consport = { + "bvmcons", + BVM_CONSOLE_PORT, + IOPORT_F_INOUT, + console_handler +}; + +void +init_bvmcons(void) +{ + + register_inout(&consport); +} |