[PATCH v4 14/14] tpm: Allow locality 2 to be set when initializing the TPM for Secure Launch

[Ross Philipson]

The Secure Launch MLE environment uses PCRs that are only accessible from
the DRTM locality 2. By default the TPM drivers always initialize the
locality to 0. When a Secure Launch is in progress, initialize the
locality to 2.

Signed-off-by: Ross Philipson <ross.philip...@oracle.com>
---
 drivers/char/tpm/tpm-chip.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index ddaeceb..ce0a3b7 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -23,6 +23,7 @@
 #include <linux/major.h>
 #include <linux/tpm_eventlog.h>
 #include <linux/hw_random.h>
+#include <linux/slaunch.h>
 #include "tpm.h"
 
 DEFINE_IDR(dev_nums_idr);
@@ -34,12 +35,18 @@
 
 static int tpm_request_locality(struct tpm_chip *chip)
 {
+       int locality;
        int rc;
 
        if (!chip->ops->request_locality)
                return 0;
 
-       rc = chip->ops->request_locality(chip, 0);
+       if (slaunch_get_flags() & SL_FLAG_ACTIVE)
+               locality = 2;
+       else
+               locality = 0;
+
+       rc = chip->ops->request_locality(chip, locality);
        if (rc < 0)
                return rc;
 
-- 
1.8.3.1

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