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Abstract out support for locating an EFI config table

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We want to grab a pointer to the TPM final events table, so abstract out
the existing code for finding an FDT table and make it generic.

Signed-off-by: Matthew Garrett <mjg59@google.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
This commit is contained in:
Matthew Garrett
2019-06-07 13:51:46 -07:00
committed by Jarkko Sakkinen
parent db4d8cb9c9
commit 82d736ac56
3 changed files with 26 additions and 18 deletions
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15
drivers/firmware/efi/libstub/efi-stub-helper.c
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@@ -926,3 +926,18 @@ free_map:
fail:
return status;
}
void *get_efi_config_table(efi_system_table_t *sys_table, efi_guid_t guid)
{
efi_config_table_t *tables = (efi_config_table_t *)sys_table->tables;
int i;
for (i = 0; i < sys_table->nr_tables; i++) {
if (efi_guidcmp(tables[i].guid, guid) != 0)
continue;
return (void *)tables[i].table;
}
return NULL;
}