hw/smbios/smbios_build.h

   1 /*
   2  * SMBIOS Support
   3  *
   4  * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
   5  * Copyright (C) 2013 Red Hat, Inc.
   6  * Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC
   7  *
   8  * Authors:
   9  *  Alex Williamson <alex.williamson@hp.com>
  10  *  Markus Armbruster <armbru@redhat.com>
  11  *
  12  * This work is licensed under the terms of the GNU GPL, version 2.  See
  13  * the COPYING file in the top-level directory.
  14  *
  15  * Contributions after 2012-01-13 are licensed under the terms of the
  16  * GNU GPL, version 2 or (at your option) any later version.
  17  */
  18
  19 #ifndef QEMU_SMBIOS_BUILD_H
  20 #define QEMU_SMBIOS_BUILD_H
  21
  22 bool smbios_skip_table(uint8_t type, bool required_table);
  23
  24 extern uint8_t *smbios_tables;
  25 extern size_t smbios_tables_len;
  26 extern unsigned smbios_table_max;
  27 extern unsigned smbios_table_cnt;
  28
  29 #define SMBIOS_BUILD_TABLE_PRE(tbl_type, tbl_handle, tbl_required)        \
  30     struct smbios_type_##tbl_type *t;                                     \
  31     size_t t_off; /* table offset into smbios_tables */                   \
  32     int str_index = 0;                                                    \
  33     do {                                                                  \
  34         /* should we skip building this table ? */                        \
  35         if (smbios_skip_table(tbl_type, tbl_required)) {                  \
  36             return;                                                       \
  37         }                                                                 \
  38                                                                           \
  39         /* use offset of table t within smbios_tables */                  \
  40         /* (pointer must be updated after each realloc) */                \
  41         t_off = smbios_tables_len;                                        \
  42         smbios_tables_len += sizeof(*t);                                  \
  43         smbios_tables = g_realloc(smbios_tables, smbios_tables_len);      \
  44         t = (struct smbios_type_##tbl_type *)(smbios_tables + t_off);     \
  45                                                                           \
  46         t->header.type = tbl_type;                                        \
  47         t->header.length = sizeof(*t);                                    \
  48         t->header.handle = cpu_to_le16(tbl_handle);                       \
  49     } while (0)
  50
  51 #define SMBIOS_TABLE_SET_STR(tbl_type, field, value)                      \
  52     do {                                                                  \
  53         int len = (value != NULL) ? strlen(value) + 1 : 0;                \
  54         if (len > 1) {                                                    \
  55             smbios_tables = g_realloc(smbios_tables,                      \
  56                                       smbios_tables_len + len);           \
  57             memcpy(smbios_tables + smbios_tables_len, value, len);        \
  58             smbios_tables_len += len;                                     \
  59             /* update pointer post-realloc */                             \
  60             t = (struct smbios_type_##tbl_type *)(smbios_tables + t_off); \
  61             t->field = ++str_index;                                       \
  62         } else {                                                          \
  63             t->field = 0;                                                 \
  64         }                                                                 \
  65     } while (0)
  66
  67 #define SMBIOS_TABLE_SET_STR_LIST(tbl_type, value)                        \
  68     do {                                                                  \
  69         int len = (value != NULL) ? strlen(value) + 1 : 0;                \
  70         if (len > 1) {                                                    \
  71             smbios_tables = g_realloc(smbios_tables,                      \
  72                                       smbios_tables_len + len);           \
  73             memcpy(smbios_tables + smbios_tables_len, value, len);        \
  74             smbios_tables_len += len;                                     \
  75             ++str_index;                                                  \
  76         }                                                                 \
  77     } while (0)
  78
  79 #define SMBIOS_BUILD_TABLE_POST                                           \
  80     do {                                                                  \
  81         size_t term_cnt, t_size;                                          \
  82                                                                           \
  83         /* add '\0' terminator (add two if no strings defined) */         \
  84         term_cnt = (str_index == 0) ? 2 : 1;                              \
  85         smbios_tables = g_realloc(smbios_tables,                          \
  86                                   smbios_tables_len + term_cnt);          \
  87         memset(smbios_tables + smbios_tables_len, 0, term_cnt);           \
  88         smbios_tables_len += term_cnt;                                    \
  89                                                                           \
  90         /* update smbios max. element size */                             \
  91         t_size = smbios_tables_len - t_off;                               \
  92         if (t_size > smbios_table_max) {                                  \
  93             smbios_table_max = t_size;                                    \
  94         }                                                                 \
  95                                                                           \
  96         /* update smbios element count */                                 \
  97         smbios_table_cnt++;                                               \
  98     } while (0)
  99
 100 /* IPMI SMBIOS firmware handling */
 101 void smbios_build_type_38_table(void);
 102
 103 #endif /* QEMU_SMBIOS_BUILD_H */