From: Ross Philipson <ross.philipson@oracle.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org,
iommu@lists.linux-foundation.org,
linux-integrity@vger.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, luto@amacapital.net,
trenchboot-devel@googlegroups.com
Subject: [PATCH v2 11/12] tpm: Allow locality 2 to be set when initializing the TPM for Secure Launch
Date: Fri, 18 Jun 2021 12:12:56 -0400 [thread overview]
Message-ID: <1624032777-7013-12-git-send-email-ross.philipson@oracle.com> (raw)
In-Reply-To: <1624032777-7013-1-git-send-email-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 ddaeceb..48b9351 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 @@
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) {
+ 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;
--
1.8.3.1
next prev parent reply other threads:[~2021-06-18 16:07 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-18 16:12 [PATCH v2 00/12] x86: Trenchboot secure dynamic launch Linux kernel support Ross Philipson
2021-06-18 16:12 ` [PATCH v2 01/12] x86/boot: Place kernel_info at a fixed offset Ross Philipson
2021-06-18 16:12 ` [PATCH v2 02/12] x86: Secure Launch Kconfig Ross Philipson
2021-06-18 16:12 ` [PATCH v2 03/12] x86: Secure Launch main header file Ross Philipson
2021-06-18 16:12 ` [PATCH v2 04/12] x86: Add early SHA support for Secure Launch early measurements Ross Philipson
2021-06-18 16:12 ` [PATCH v2 05/12] x86: Secure Launch kernel early boot stub Ross Philipson
2021-06-18 16:12 ` [PATCH v2 06/12] x86: Secure Launch kernel late " Ross Philipson
2021-06-18 16:12 ` [PATCH v2 07/12] x86: Secure Launch SMP bringup support Ross Philipson
2021-06-18 16:12 ` [PATCH v2 08/12] kexec: Secure Launch kexec SEXIT support Ross Philipson
2021-06-18 16:12 ` [PATCH v2 09/12] reboot: Secure Launch SEXIT support on reboot paths Ross Philipson
2021-06-18 16:12 ` [PATCH v2 10/12] x86: Secure Launch late initcall platform module Ross Philipson
2021-06-18 16:12 ` Ross Philipson [this message]
2021-06-18 16:12 ` [PATCH v2 12/12] iommu: Do not allow IOMMU passthrough with Secure Launch Ross Philipson
2021-06-18 18:32 ` Robin Murphy
2021-06-21 17:51 ` Ross Philipson
2021-06-21 21:15 ` Andy Lutomirski
2021-06-30 9:50 ` Ross Philipson
2021-08-04 3:05 ` Daniel P. Smith
2021-06-22 11:06 ` Robin Murphy
2021-06-30 9:47 ` Ross Philipson
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