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From: Ross Philipson <ross.philipson@oracle.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org, linux-doc@vger.kernel.org
Cc: ross.philipson@oracle.com, dpsmith@apertussolutions.com,
	tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
	hpa@zytor.com, trenchboot-devel@googlegroups.com
Subject: [RFC PATCH 12/12] tpm: Allow locality 2 to be set when initializing the TPM for Secure Launch
Date: Wed, 25 Mar 2020 15:43:17 -0400	[thread overview]
Message-ID: <20200325194317.526492-13-ross.philipson@oracle.com> (raw)
In-Reply-To: <20200325194317.526492-1-ross.philipson@oracle.com>

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.philipson@oracle.com>
---
 drivers/char/tpm/tpm-chip.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 3d6d394a8661..e74860537252 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 +35,20 @@ dev_t tpm_devt;
 
 static int tpm_request_locality(struct tpm_chip *chip)
 {
-	int rc;
+	int rc, locality;
 
 	if (!chip->ops->request_locality)
 		return 0;
 
-	rc = chip->ops->request_locality(chip, 0);
+	if (slaunch_get_flags() & (SL_FLAG_ACTIVE|SL_FLAG_ARCH_TXT)) {
+		dev_dbg(&chip->dev, "setting TPM locality to 2 for MLE\n");
+		locality = 2;
+	} else {
+		dev_dbg(&chip->dev, "setting TPM locality to 0\n");
+		locality = 0;
+	}
+
+	rc = chip->ops->request_locality(chip, locality);
 	if (rc < 0)
 		return rc;
 
-- 
2.25.1


  parent reply	other threads:[~2020-03-25 19:44 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25 19:43 [RFC PATCH 00/12] x86: Trenchboot secure late launch Linux kernel support Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 01/12] x86: Secure Launch Kconfig Ross Philipson
2020-03-26 18:06   ` Daniel Kiper
2020-03-26 19:42     ` Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 02/12] x86: Secure Launch main header file Ross Philipson
2020-03-26 19:00   ` Daniel Kiper
2020-03-25 19:43 ` [RFC PATCH 03/12] x86: Add early SHA support for Secure Launch early measurements Ross Philipson
2020-03-26  3:44   ` Andy Lutomirski
2020-03-26 22:49     ` Daniel P. Smith
2020-03-25 19:43 ` [RFC PATCH 04/12] x86: Add early TPM TIS/CRB interface support for Secure Launch Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 05/12] x86: Add early TPM1.2/TPM2.0 " Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 06/12] x86: Add early general TPM " Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 07/12] x86: Secure Launch kernel early boot stub Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 08/12] x86: Secure Launch kernel late " Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 09/12] x86: Secure Launch SMP bringup support Ross Philipson
2020-03-25 19:43 ` [RFC PATCH 10/12] x86: Secure Launch adding event log securityfs Ross Philipson
2020-03-25 20:21   ` Matthew Garrett
2020-03-25 21:43     ` Daniel P. Smith
2020-03-25 19:43 ` [RFC PATCH 11/12] kexec: Secure Launch kexec SEXIT support Ross Philipson
2020-03-25 19:43 ` Ross Philipson [this message]
2020-03-25 20:29 ` [RFC PATCH 00/12] x86: Trenchboot secure late launch Linux kernel support Matthew Garrett
2020-03-25 22:51   ` Andy Lutomirski
2020-03-26 20:50     ` Daniel P. Smith
2020-03-26 23:13       ` Andy Lutomirski
2020-05-11 19:00         ` Daniel P. Smith
2020-03-26 13:40   ` Daniel Kiper
2020-03-26 20:19     ` Matthew Garrett
2020-03-26 20:33       ` Andy Lutomirski
2020-03-26 20:40         ` Matthew Garrett
2020-03-26 20:59           ` Daniel P. Smith
2020-03-26 21:07           ` Andy Lutomirski
2020-03-26 21:28             ` Matthew Garrett
2020-03-26 22:52               ` Andy Lutomirski
2020-03-26 22:59                 ` Matthew Garrett
2020-03-26 23:04                   ` Andy Lutomirski
2020-03-27  0:01                     ` Daniel P. Smith
2020-03-26 23:50                 ` Daniel P. Smith
2020-05-11 19:00       ` Daniel P. Smith
2020-03-26 20:50   ` Daniel P. Smith
2020-03-26 20:54     ` Matthew Garrett
2020-03-26 22:37       ` Daniel P. Smith
2020-03-26 22:41         ` Matthew Garrett
2020-03-26 23:55           ` Daniel P. Smith

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