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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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27
drivers/firmware/efi/libstub/fdt.c
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@@ -363,26 +363,17 @@ fail:
void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size)
{
efi_guid_t fdt_guid = DEVICE_TREE_GUID;
efi_config_table_t *tables;
int i;
void *fdt;
tables = (efi_config_table_t *)sys_table->tables;
fdt = get_efi_config_table(sys_table, DEVICE_TREE_GUID);
for (i = 0; i < sys_table->nr_tables; i++) {
void *fdt;
if (!fdt)
return NULL;
if (efi_guidcmp(tables[i].guid, fdt_guid) != 0)
continue;
fdt = (void *)tables[i].table;
if (fdt_check_header(fdt) != 0) {
pr_efi_err(sys_table, "Invalid header detected on UEFI supplied FDT, ignoring ...\n");
return NULL;
}
*fdt_size = fdt_totalsize(fdt);
return fdt;
if (fdt_check_header(fdt) != 0) {
pr_efi_err(sys_table, "Invalid header detected on UEFI supplied FDT, ignoring ...\n");
return NULL;
}
return NULL;
*fdt_size = fdt_totalsize(fdt);
return fdt;
}