[PATCH 1/4] efi: libstub/tpm: enable tpm eventlog function for ARM platforms

[Ike Panhc]

From: Xinwei Kong <kong.kongxinwei at hisilicon.com>

BugLink: https://launchpad.net/bugs/1859743

Wire up the existing code for ARM that loads the TPM event log into
OS accessible buffers while running the EFI stub so that the kernel
proper can access it at runtime.

Tested-by: Zou Cao <zoucao at linux.alibaba.com>
Signed-off-by: Xinwei Kong <kong.kongxinwei at hisilicon.com>
Signed-off-by: Ard Biesheuvel <ardb at kernel.org>
(cherry picked from commit d99c1ba6a73b9e93e2884b7893fe19e3c082ba03)
Signed-off-by: Ike Panhc <ike.pan at canonical.com>
---
 drivers/firmware/efi/libstub/arm-stub.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c
index c382a48c6678..817237ce2420 100644
--- a/drivers/firmware/efi/libstub/arm-stub.c
+++ b/drivers/firmware/efi/libstub/arm-stub.c
@@ -189,6 +189,8 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,
 		goto fail_free_cmdline;
 	}
 
+	efi_retrieve_tpm2_eventlog(sys_table);
+
 	/* Ask the firmware to clear memory on unclean shutdown */
 	efi_enable_reset_attack_mitigation(sys_table);
 
-- 
2.17.1