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authorThiebaud Weksteen <tweek@google.com>2017-09-20 11:13:39 +0300
committerJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2018-01-08 13:58:35 +0300
commit33b6d03469b2206fb51ecc37f40411a857ad8fff (patch)
tree6b0c5cc3fc87cdc3e5f796b55094563fb9c1bf69 /drivers/firmware/efi/efi.c
parent4d01d29d9307d321149ff5ad66d47bee8e56c012 (diff)
downloadlinux-33b6d03469b2206fb51ecc37f40411a857ad8fff.tar.xz
efi: call get_event_log before ExitBootServices
With TPM 2.0 specification, the event logs may only be accessible by calling an EFI Boot Service. Modify the EFI stub to copy the log area to a new Linux-specific EFI configuration table so it remains accessible once booted. When calling this service, it is possible to specify the expected format of the logs: TPM 1.2 (SHA1) or TPM 2.0 ("Crypto Agile"). For now, only the first format is retrieved. Signed-off-by: Thiebaud Weksteen <tweek@google.com> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Tested-by: Javier Martinez Canillas <javierm@redhat.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/firmware/efi/efi.c')
-rw-r--r--drivers/firmware/efi/efi.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 557a47829d03..cfa6fe786ab6 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -52,6 +52,7 @@ struct efi __read_mostly efi = {
.properties_table = EFI_INVALID_TABLE_ADDR,
.mem_attr_table = EFI_INVALID_TABLE_ADDR,
.rng_seed = EFI_INVALID_TABLE_ADDR,
+ .tpm_log = EFI_INVALID_TABLE_ADDR
};
EXPORT_SYMBOL(efi);
@@ -464,6 +465,7 @@ static __initdata efi_config_table_type_t common_tables[] = {
{EFI_PROPERTIES_TABLE_GUID, "PROP", &efi.properties_table},
{EFI_MEMORY_ATTRIBUTES_TABLE_GUID, "MEMATTR", &efi.mem_attr_table},
{LINUX_EFI_RANDOM_SEED_TABLE_GUID, "RNG", &efi.rng_seed},
+ {LINUX_EFI_TPM_EVENT_LOG_GUID, "TPMEventLog", &efi.tpm_log},
{NULL_GUID, NULL, NULL},
};
@@ -552,6 +554,8 @@ int __init efi_config_parse_tables(void *config_tables, int count, int sz,
if (efi_enabled(EFI_MEMMAP))
efi_memattr_init();
+ efi_tpm_eventlog_init();
+
/* Parse the EFI Properties table if it exists */
if (efi.properties_table != EFI_INVALID_TABLE_ADDR) {
efi_properties_table_t *tbl;