--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "efi-string.h"
+#include "efivars.h"
+#include "proto/device-path.h"
+#include "smbios.h"
+#include "string-util-fundamental.h"
+#include "util.h"
+
+#define SMBIOS_TABLE_GUID \
+ GUID_DEF(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
+#define SMBIOS3_TABLE_GUID \
+ GUID_DEF(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
+
+typedef struct {
+ uint8_t anchor_string[4];
+ uint8_t entry_point_structure_checksum;
+ uint8_t entry_point_length;
+ uint8_t major_version;
+ uint8_t minor_version;
+ uint16_t max_structure_size;
+ uint8_t entry_point_revision;
+ uint8_t formatted_area[5];
+ uint8_t intermediate_anchor_string[5];
+ uint8_t intermediate_checksum;
+ uint16_t table_length;
+ uint32_t table_address;
+ uint16_t number_of_smbios_structures;
+ uint8_t smbios_bcd_revision;
+} _packed_ SmbiosEntryPoint;
+
+typedef struct {
+ uint8_t anchor_string[5];
+ uint8_t entry_point_structure_checksum;
+ uint8_t entry_point_length;
+ uint8_t major_version;
+ uint8_t minor_version;
+ uint8_t docrev;
+ uint8_t entry_point_revision;
+ uint8_t reserved;
+ uint32_t table_maximum_size;
+ uint64_t table_address;
+} _packed_ Smbios3EntryPoint;
+
+typedef struct {
+ uint8_t type;
+ uint8_t length;
+ uint8_t handle[2];
+} _packed_ SmbiosHeader;
+
+typedef struct {
+ SmbiosHeader header;
+ uint8_t vendor;
+ uint8_t bios_version;
+ uint16_t bios_segment;
+ uint8_t bios_release_date;
+ uint8_t bios_size;
+ uint64_t bios_characteristics;
+ uint8_t bios_characteristics_ext[2];
+} _packed_ SmbiosTableType0;
+
+typedef struct {
+ SmbiosHeader header;
+ uint8_t count;
+ char contents[];
+} _packed_ SmbiosTableType11;
+
+static const void *find_smbios_configuration_table(uint64_t *ret_size) {
+ assert(ret_size);
+
+ const Smbios3EntryPoint *entry3 = find_configuration_table(MAKE_GUID_PTR(SMBIOS3_TABLE));
+ if (entry3 && memcmp(entry3->anchor_string, "_SM3_", 5) == 0 &&
+ entry3->entry_point_length <= sizeof(*entry3)) {
+ *ret_size = entry3->table_maximum_size;
+ return PHYSICAL_ADDRESS_TO_POINTER(entry3->table_address);
+ }
+
+ const SmbiosEntryPoint *entry = find_configuration_table(MAKE_GUID_PTR(SMBIOS_TABLE));
+ if (entry && memcmp(entry->anchor_string, "_SM_", 4) == 0 &&
+ entry->entry_point_length <= sizeof(*entry)) {
+ *ret_size = entry->table_length;
+ return PHYSICAL_ADDRESS_TO_POINTER(entry->table_address);
+ }
+
+ return NULL;
+}
+
+static const SmbiosHeader *get_smbios_table(uint8_t type, size_t min_size, uint64_t *ret_size_left) {
+ uint64_t size = 0;
+ const uint8_t *p = find_smbios_configuration_table(&size);
+ if (!p)
+ return NULL;
+
+ for (;;) {
+ if (size < sizeof(SmbiosHeader))
+ return NULL;
+
+ const SmbiosHeader *header = (const SmbiosHeader *) p;
+
+ /* End of table. */
+ if (header->type == 127)
+ return NULL;
+
+ if (size < header->length)
+ return NULL;
+
+ if (header->type == type) {
+ /* Table is smaller than the minimum expected size? Refuse */
+ if (header->length < min_size)
+ return NULL;
+
+ if (ret_size_left)
+ *ret_size_left = size;
+ return header; /* Yay! */
+ }
+
+ /* Skip over formatted area. */
+ size -= header->length;
+ p += header->length;
+
+ /* Special case: if there are no strings appended, we'll see two NUL bytes, skip over them */
+ if (size >= 2 && p[0] == 0 && p[1] == 0) {
+ size -= 2;
+ p += 2;
+ continue;
+ }
+
+ /* Skip over a populated string table. */
+ bool first = true;
+ for (;;) {
+ const uint8_t *e = memchr(p, 0, size);
+ if (!e)
+ return NULL;
+
+ if (!first && e == p) {/* Double NUL byte means we've reached the end of the string table. */
+ p++;
+ size--;
+ break;
+ }
+
+ size -= e + 1 - p;
+ p = e + 1;
+ first = false;
+ }
+ }
+
+ return NULL;
+}
+
+bool smbios_in_hypervisor(void) {
+ /* Look up BIOS Information (Type 0). */
+ const SmbiosTableType0 *type0 = (const SmbiosTableType0 *) get_smbios_table(0, sizeof(SmbiosTableType0), /* left= */ NULL);
+ if (!type0)
+ return false;
+
+ /* Bit 4 of 2nd BIOS characteristics extension bytes indicates virtualization. */
+ return FLAGS_SET(type0->bios_characteristics_ext[1], 1 << 4);
+}
+
+const char* smbios_find_oem_string(const char *name) {
+ uint64_t left;
+
+ assert(name);
+
+ const SmbiosTableType11 *type11 = (const SmbiosTableType11 *) get_smbios_table(11, sizeof(SmbiosTableType11), &left);
+ if (!type11)
+ return NULL;
+
+ const char *s = type11->contents;
+
+ assert(left >= type11->header.length); /* get_smbios_table() already validated this */
+ left -= type11->header.length;
+ const char *limit = s + left;
+
+ for (const char *p = s; p < limit; ) {
+ const char *e = memchr(p, 0, limit - p);
+ if (!e || e == p) /* Double NUL byte means we've reached the end of the OEM strings. */
+ break;
+
+ const char *eq = startswith8(p, name);
+ if (eq && *eq == '=')
+ return eq + 1;
+
+ p = e + 1;
+ }
+
+ return NULL;
+}
#include "efi-string.h"
#include "efivars.h"
#include "proto/device-path.h"
+#include "smbios.h"
#include "string-util-fundamental.h"
#include "util.h"
#include "vmm.h"
return false;
}
-#define SMBIOS_TABLE_GUID \
- GUID_DEF(0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
-#define SMBIOS3_TABLE_GUID \
- GUID_DEF(0xf2fd1544, 0x9794, 0x4a2c, 0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
-
-typedef struct {
- uint8_t anchor_string[4];
- uint8_t entry_point_structure_checksum;
- uint8_t entry_point_length;
- uint8_t major_version;
- uint8_t minor_version;
- uint16_t max_structure_size;
- uint8_t entry_point_revision;
- uint8_t formatted_area[5];
- uint8_t intermediate_anchor_string[5];
- uint8_t intermediate_checksum;
- uint16_t table_length;
- uint32_t table_address;
- uint16_t number_of_smbios_structures;
- uint8_t smbios_bcd_revision;
-} _packed_ SmbiosEntryPoint;
-
-typedef struct {
- uint8_t anchor_string[5];
- uint8_t entry_point_structure_checksum;
- uint8_t entry_point_length;
- uint8_t major_version;
- uint8_t minor_version;
- uint8_t docrev;
- uint8_t entry_point_revision;
- uint8_t reserved;
- uint32_t table_maximum_size;
- uint64_t table_address;
-} _packed_ Smbios3EntryPoint;
-
-typedef struct {
- uint8_t type;
- uint8_t length;
- uint8_t handle[2];
-} _packed_ SmbiosHeader;
-
-typedef struct {
- SmbiosHeader header;
- uint8_t vendor;
- uint8_t bios_version;
- uint16_t bios_segment;
- uint8_t bios_release_date;
- uint8_t bios_size;
- uint64_t bios_characteristics;
- uint8_t bios_characteristics_ext[2];
-} _packed_ SmbiosTableType0;
-
-typedef struct {
- SmbiosHeader header;
- uint8_t count;
- char contents[];
-} _packed_ SmbiosTableType11;
-
-static const void *find_smbios_configuration_table(uint64_t *ret_size) {
- assert(ret_size);
-
- const Smbios3EntryPoint *entry3 = find_configuration_table(MAKE_GUID_PTR(SMBIOS3_TABLE));
- if (entry3 && memcmp(entry3->anchor_string, "_SM3_", 5) == 0 &&
- entry3->entry_point_length <= sizeof(*entry3)) {
- *ret_size = entry3->table_maximum_size;
- return PHYSICAL_ADDRESS_TO_POINTER(entry3->table_address);
- }
-
- const SmbiosEntryPoint *entry = find_configuration_table(MAKE_GUID_PTR(SMBIOS_TABLE));
- if (entry && memcmp(entry->anchor_string, "_SM_", 4) == 0 &&
- entry->entry_point_length <= sizeof(*entry)) {
- *ret_size = entry->table_length;
- return PHYSICAL_ADDRESS_TO_POINTER(entry->table_address);
- }
-
- return NULL;
-}
-
-static const SmbiosHeader *get_smbios_table(uint8_t type, size_t min_size, uint64_t *ret_size_left) {
- uint64_t size = 0;
- const uint8_t *p = find_smbios_configuration_table(&size);
- if (!p)
- return NULL;
-
- for (;;) {
- if (size < sizeof(SmbiosHeader))
- return NULL;
-
- const SmbiosHeader *header = (const SmbiosHeader *) p;
-
- /* End of table. */
- if (header->type == 127)
- return NULL;
-
- if (size < header->length)
- return NULL;
-
- if (header->type == type) {
- /* Table is smaller than the minimum expected size? Refuse */
- if (header->length < min_size)
- return NULL;
-
- if (ret_size_left)
- *ret_size_left = size;
- return header; /* Yay! */
- }
-
- /* Skip over formatted area. */
- size -= header->length;
- p += header->length;
-
- /* Special case: if there are no strings appended, we'll see two NUL bytes, skip over them */
- if (size >= 2 && p[0] == 0 && p[1] == 0) {
- size -= 2;
- p += 2;
- continue;
- }
-
- /* Skip over a populated string table. */
- bool first = true;
- for (;;) {
- const uint8_t *e = memchr(p, 0, size);
- if (!e)
- return NULL;
-
- if (!first && e == p) {/* Double NUL byte means we've reached the end of the string table. */
- p++;
- size--;
- break;
- }
-
- size -= e + 1 - p;
- p = e + 1;
- first = false;
- }
- }
-
- return NULL;
-}
-
-static bool smbios_in_hypervisor(void) {
- /* Look up BIOS Information (Type 0). */
- const SmbiosTableType0 *type0 = (const SmbiosTableType0 *) get_smbios_table(0, sizeof(SmbiosTableType0), /* left= */ NULL);
- if (!type0)
- return false;
-
- /* Bit 4 of 2nd BIOS characteristics extension bytes indicates virtualization. */
- return FLAGS_SET(type0->bios_characteristics_ext[1], 1 << 4);
-}
-
bool in_hypervisor(void) {
static int cache = -1;
if (cache >= 0)
return cache;
}
-const char* smbios_find_oem_string(const char *name) {
- uint64_t left;
-
- assert(name);
-
- const SmbiosTableType11 *type11 = (const SmbiosTableType11 *) get_smbios_table(11, sizeof(SmbiosTableType11), &left);
- if (!type11)
- return NULL;
-
- const char *s = type11->contents;
-
- assert(left >= type11->header.length); /* get_smbios_table() already validated this */
- left -= type11->header.length;
- const char *limit = s + left;
-
- for (const char *p = s; p < limit; ) {
- const char *e = memchr(p, 0, limit - p);
- if (!e || e == p) /* Double NUL byte means we've reached the end of the OEM strings. */
- break;
-
- const char *eq = startswith8(p, name);
- if (eq && *eq == '=')
- return eq + 1;
-
- p = e + 1;
- }
-
- return NULL;
-}
-
#if defined(__i386__) || defined(__x86_64__)
static uint32_t cpuid_leaf(uint32_t eax, char ret_sig[static 13], bool swapped) {
/* zero-init as some queries explicitly require subleaf == 0 */
projects / thirdparty / systemd.git / commitdiff
