[coreboot-gerrit] Change in coreboot[master]: drivers/crb: Add support for PTT

[Philipp Deppenwiese (Code Review)]

Philipp Deppenwiese has submitted this change and it was merged. ( https://review.coreboot.org/c/coreboot/+/34381 )

Change subject: drivers/crb: Add support for PTT
......................................................................

drivers/crb: Add support for PTT

When we use Intel Platform Trust Technologies, we need to verify
that the enable bit is set before we use the integrated TPM.

Change-Id: I3b262a5d5253648fb96fb1fd9ba3995f92755bb1
Signed-off-by: Christian Walter 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34381
Tested-by: build bot (Jenkins) 
Reviewed-by: Philipp Deppenwiese 
Reviewed-by: Julius Werner 
---
M src/drivers/crb/tis.c
1 file changed, 9 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Philipp Deppenwiese: Looks good to me, approved
  Julius Werner: Looks good to me, but someone else must approve

diff --git a/src/drivers/crb/tis.c b/src/drivers/crb/tis.c
index c110151..94bfb9e 100644
--- a/src/drivers/crb/tis.c
+++ b/src/drivers/crb/tis.c
@@ -16,6 +16,7 @@
 #include <security/tpm/tis.h>
 #include <arch/acpigen.h>
 #include <device/device.h>
+#include <drivers/intel/ptt/ptt.h>

#include "tpm.h"
 #include "chip.h"
@@ -49,6 +50,14 @@
    	return -1;
    }

+	if (CONFIG(HAVE_INTEL_PTT)) {
+		if (!ptt_active()) {
+			printk(BIOS_ERR, "%s: Intel PTT is not active.\n", __func__);
+			return -1;
+		}
+		printk(BIOS_DEBUG, "%s: Intel PTT is active.\n", __func__);
+	}
+
    return 0;
 }