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efi: Use the correct GUID for the SMBIOS table

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EFI does not use the 'anchor string' to determine the SMBIOS table
version, instead preferring to have two separate GUIDs. Use the correct
one, depending on the table version.

Call unmap_system() to balance to the use of map_sysmem()

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Simon Glass 2023-12-31 08:25:49 -07:00
parent b2b58e1ef5
commit 138e69149b
2 changed files with 14 additions and 2 deletions
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4
include/efi_api.h
View file

@ -433,6 +433,10 @@ struct efi_runtime_services {
EFI_GUID(0xeb9d2d31, 0x2d88, 0x11d3, \
0x9a, 0x16, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
#define SMBIOS3_TABLE_GUID \
EFI_GUID(0xf2fd1544, 0x9794, 0x4a2c, \
0x99, 0x2e, 0xe5, 0xbb, 0xcf, 0x20, 0xe3, 0x94)
#define EFI_LOAD_FILE_PROTOCOL_GUID \
EFI_GUID(0x56ec3091, 0x954c, 0x11d2, \
0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)

12
lib/efi_loader/efi_smbios.c
View file

@ -14,6 +14,8 @@
#include <smbios.h>
#include <linux/sizes.h>
const efi_guid_t smbios3_guid = SMBIOS3_TABLE_GUID;
enum {
TABLE_SIZE = SZ_4K,
};
@ -25,8 +27,10 @@ enum {
*/
efi_status_t efi_smbios_register(void)
{
const efi_guid_t *guid;
ulong addr;
efi_status_t ret;
void *buf;
addr = gd_smbios_start();
if (!addr) {
@ -42,8 +46,12 @@ efi_status_t efi_smbios_register(void)
log_debug("EFI using SMBIOS tables at %lx\n", addr);
/* Install SMBIOS information as configuration table */
return efi_install_configuration_table(&smbios_guid,
map_sysmem(addr, 0));
buf = map_sysmem(addr, 0);
guid = !memcmp(buf, "_SM_", 4) ? &smbios_guid : &smbios3_guid;
ret = efi_install_configuration_table(guid, buf);
unmap_sysmem(buf);
return ret;
}
static int install_smbios_table(void)