Wei Liu | 04b0de0 | 2014-05-07 16:16:43 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Citrix Systems UK Ltd. |
| 3 | * |
| 4 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 5 | * the COPYING file in the top-level directory. |
| 6 | * |
| 7 | * Contributions after 2012-01-13 are licensed under the terms of the |
| 8 | * GNU GPL, version 2 or (at your option) any later version. |
| 9 | */ |
| 10 | |
Peter Maydell | 21cbfe5 | 2016-01-26 18:17:06 +0000 | [diff] [blame] | 11 | #include "qemu/osdep.h" |
Wei Liu | 04b0de0 | 2014-05-07 16:16:43 +0000 | [diff] [blame] | 12 | #include "hw/xen/xen_backend.h" |
| 13 | #include "qmp-commands.h" |
| 14 | #include "sysemu/char.h" |
Eduardo Habkost | b152b05 | 2014-09-26 17:45:25 -0300 | [diff] [blame] | 15 | #include "sysemu/accel.h" |
Anthony PERARD | 8c6dc68 | 2015-08-03 15:29:21 +0100 | [diff] [blame] | 16 | #include "migration/migration.h" |
Wei Liu | 04b0de0 | 2014-05-07 16:16:43 +0000 | [diff] [blame] | 17 | |
| 18 | //#define DEBUG_XEN |
| 19 | |
| 20 | #ifdef DEBUG_XEN |
| 21 | #define DPRINTF(fmt, ...) \ |
| 22 | do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0) |
| 23 | #else |
| 24 | #define DPRINTF(fmt, ...) \ |
| 25 | do { } while (0) |
| 26 | #endif |
| 27 | |
| 28 | static int store_dev_info(int domid, CharDriverState *cs, const char *string) |
| 29 | { |
| 30 | struct xs_handle *xs = NULL; |
| 31 | char *path = NULL; |
| 32 | char *newpath = NULL; |
| 33 | char *pts = NULL; |
| 34 | int ret = -1; |
| 35 | |
| 36 | /* Only continue if we're talking to a pty. */ |
| 37 | if (strncmp(cs->filename, "pty:", 4)) { |
| 38 | return 0; |
| 39 | } |
| 40 | pts = cs->filename + 4; |
| 41 | |
| 42 | /* We now have everything we need to set the xenstore entry. */ |
| 43 | xs = xs_open(0); |
| 44 | if (xs == NULL) { |
| 45 | fprintf(stderr, "Could not contact XenStore\n"); |
| 46 | goto out; |
| 47 | } |
| 48 | |
| 49 | path = xs_get_domain_path(xs, domid); |
| 50 | if (path == NULL) { |
| 51 | fprintf(stderr, "xs_get_domain_path() error\n"); |
| 52 | goto out; |
| 53 | } |
| 54 | newpath = realloc(path, (strlen(path) + strlen(string) + |
| 55 | strlen("/tty") + 1)); |
| 56 | if (newpath == NULL) { |
| 57 | fprintf(stderr, "realloc error\n"); |
| 58 | goto out; |
| 59 | } |
| 60 | path = newpath; |
| 61 | |
| 62 | strcat(path, string); |
| 63 | strcat(path, "/tty"); |
| 64 | if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) { |
| 65 | fprintf(stderr, "xs_write for '%s' fail", string); |
| 66 | goto out; |
| 67 | } |
| 68 | ret = 0; |
| 69 | |
| 70 | out: |
| 71 | free(path); |
| 72 | xs_close(xs); |
| 73 | |
| 74 | return ret; |
| 75 | } |
| 76 | |
| 77 | void xenstore_store_pv_console_info(int i, CharDriverState *chr) |
| 78 | { |
| 79 | if (i == 0) { |
| 80 | store_dev_info(xen_domid, chr, "/console"); |
| 81 | } else { |
| 82 | char buf[32]; |
| 83 | snprintf(buf, sizeof(buf), "/device/console/%d", i); |
| 84 | store_dev_info(xen_domid, chr, buf); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | |
| 89 | static void xenstore_record_dm_state(struct xs_handle *xs, const char *state) |
| 90 | { |
| 91 | char path[50]; |
| 92 | |
| 93 | if (xs == NULL) { |
| 94 | fprintf(stderr, "xenstore connection not initialized\n"); |
| 95 | exit(1); |
| 96 | } |
| 97 | |
| 98 | snprintf(path, sizeof (path), "device-model/%u/state", xen_domid); |
| 99 | if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) { |
| 100 | fprintf(stderr, "error recording dm state\n"); |
| 101 | exit(1); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | |
| 106 | static void xen_change_state_handler(void *opaque, int running, |
| 107 | RunState state) |
| 108 | { |
| 109 | if (running) { |
| 110 | /* record state running */ |
| 111 | xenstore_record_dm_state(xenstore, "running"); |
| 112 | } |
| 113 | } |
| 114 | |
Eduardo Habkost | f6a1ef6 | 2014-09-26 17:45:30 -0300 | [diff] [blame] | 115 | static int xen_init(MachineState *ms) |
Wei Liu | 04b0de0 | 2014-05-07 16:16:43 +0000 | [diff] [blame] | 116 | { |
Ian Campbell | 81daba58 | 2016-02-10 11:07:03 +0000 | [diff] [blame] | 117 | xen_xc = xc_interface_open(0, 0, 0); |
| 118 | if (xen_xc == NULL) { |
Wei Liu | 04b0de0 | 2014-05-07 16:16:43 +0000 | [diff] [blame] | 119 | xen_be_printf(NULL, 0, "can't open xen interface\n"); |
| 120 | return -1; |
| 121 | } |
Ian Campbell | e0cb42a | 2016-01-15 13:23:41 +0000 | [diff] [blame] | 122 | xen_fmem = xenforeignmemory_open(0, 0); |
| 123 | if (xen_fmem == NULL) { |
| 124 | xen_be_printf(NULL, 0, "can't open xen fmem interface\n"); |
| 125 | xc_interface_close(xen_xc); |
| 126 | return -1; |
| 127 | } |
Wei Liu | 04b0de0 | 2014-05-07 16:16:43 +0000 | [diff] [blame] | 128 | qemu_add_vm_change_state_handler(xen_change_state_handler, NULL); |
| 129 | |
Anthony PERARD | 8c6dc68 | 2015-08-03 15:29:21 +0100 | [diff] [blame] | 130 | global_state_set_optional(); |
| 131 | savevm_skip_configuration(); |
| 132 | savevm_skip_section_footers(); |
| 133 | |
Wei Liu | 04b0de0 | 2014-05-07 16:16:43 +0000 | [diff] [blame] | 134 | return 0; |
| 135 | } |
| 136 | |
Eduardo Habkost | b152b05 | 2014-09-26 17:45:25 -0300 | [diff] [blame] | 137 | static void xen_accel_class_init(ObjectClass *oc, void *data) |
| 138 | { |
| 139 | AccelClass *ac = ACCEL_CLASS(oc); |
| 140 | ac->name = "Xen"; |
Eduardo Habkost | 0d15da8 | 2014-09-26 17:45:29 -0300 | [diff] [blame] | 141 | ac->init_machine = xen_init; |
Eduardo Habkost | b152b05 | 2014-09-26 17:45:25 -0300 | [diff] [blame] | 142 | ac->allowed = &xen_allowed; |
| 143 | } |
| 144 | |
| 145 | #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen") |
| 146 | |
| 147 | static const TypeInfo xen_accel_type = { |
| 148 | .name = TYPE_XEN_ACCEL, |
| 149 | .parent = TYPE_ACCEL, |
| 150 | .class_init = xen_accel_class_init, |
| 151 | }; |
| 152 | |
| 153 | static void xen_type_init(void) |
| 154 | { |
| 155 | type_register_static(&xen_accel_type); |
| 156 | } |
| 157 | |
| 158 | type_init(xen_type_init); |