security/vboot: Add Support for Intel PTT

Add support for Intel PTT. For supporting Intel PTT we need to disable
read and write access to the TPM NVRAM during the bootblock. TPM NVRAM
will only be available once the DRAM is initialized. To circumvent this,
we mock secdata if HAVE_INTEL_PTT is set. The underlying problem is,
that the iTPM only supports a stripped down instruction set while the
Intel ME is not fully booted up. Details can be found in Intel document
number 571993 - Paragraph 2.10.

Change-Id: I08c9a839f53f96506be5fb68f7c1ed5bf6692505
Signed-off-by: Christian Walter <christian.walter@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34510
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>

1 files changed, 1 insertions, 7 deletions

diff --git a/src/security/vboot/secdata_mock.c b/src/security/vboot/secdata_mock.c
index 3075d335f6..43206df6b9 100644
--- a/src/security/vboot/secdata_mock.c
+++ b/src/security/vboot/secdata_mock.c
@@ -43,12 +43,6 @@ int vb2ex_tpm_clear_owner(struct vb2_context *ctx)
 	return VB2_SUCCESS;
 }
 
-uint32_t vboot_extend_pcr(struct vb2_context *ctx, int pcr,
-			enum vb2_pcr_digest which_digest)
-{
-	return VB2_SUCCESS;
-}
-
 uint32_t antirollback_read_space_firmware(struct vb2_context *ctx)
 {
 	vb2api_secdata_create(ctx);
@@ -60,7 +54,7 @@ uint32_t antirollback_write_space_firmware(struct vb2_context *ctx)
 	return VB2_SUCCESS;
 }
 
-uint32_t antirollback_lock_space_firmware()
+uint32_t antirollback_lock_space_firmware(void)
 {
 	return VB2_SUCCESS;
 }