From: Stefan Berger <stefanb@linux.vnet.ibm.com>
To: jarkko.sakkinen@linux.intel.com, linux-integrity@vger.kernel.org
Cc: aik@ozlabs.ru, david@gibson.dropbear.id.au,
linux-kernel@vger.kernel.org, nayna@linux.vnet.ibm.com,
gcwilson@linux.ibm.com, jgg@ziepe.ca,
Stefan Berger <stefanb@linux.ibm.com>
Subject: [PATCH v3 1/4] tpm: of: Handle IBM,vtpm20 case when getting log parameters
Date: Tue, 25 Feb 2020 15:53:02 -0500 [thread overview]
Message-ID: <20200225205305.3948001-2-stefanb@linux.vnet.ibm.com> (raw)
In-Reply-To: <20200225205305.3948001-1-stefanb@linux.vnet.ibm.com>
From: Stefan Berger <stefanb@linux.ibm.com>
A vTPM 2.0 is identified by 'IBM,vtpm20' in the 'compatible' node in
the device tree. Handle it in the same way as 'IBM,vtpm'.
The vTPM 2.0's log is written in little endian format so that for this
aspect we can rely on existing code.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/eventlog/of.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/char/tpm/eventlog/of.c b/drivers/char/tpm/eventlog/of.c
index af347c190819..a31a625ad44e 100644
--- a/drivers/char/tpm/eventlog/of.c
+++ b/drivers/char/tpm/eventlog/of.c
@@ -17,6 +17,12 @@
#include "../tpm.h"
#include "common.h"
+static const char * const compatibles[] = {
+ "IBM,vtpm",
+ "IBM,vtpm20",
+ NULL
+};
+
int tpm_read_log_of(struct tpm_chip *chip)
{
struct device_node *np;
@@ -51,7 +57,7 @@ int tpm_read_log_of(struct tpm_chip *chip)
* endian format. For this reason, vtpm doesn't need conversion
* but physical tpm needs the conversion.
*/
- if (of_property_match_string(np, "compatible", "IBM,vtpm") < 0) {
+ if (!of_device_compatible_match(np, compatibles)) {
size = be32_to_cpup((__force __be32 *)sizep);
base = be64_to_cpup((__force __be64 *)basep);
} else {
--
2.23.0
next prev parent reply other threads:[~2020-02-25 20:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 20:53 [PATCH v3 0/4] Enable vTPM 2.0 for the IBM vTPM driver Stefan Berger
2020-02-25 20:53 ` Stefan Berger [this message]
2020-02-25 20:53 ` [PATCH v3 2/4] tpm: ibmvtpm: Wait for buffer to be set before proceeding Stefan Berger
2020-02-25 20:53 ` [PATCH v3 3/4] tpm: Implement tpm2_init_commands to use in non-auto startup case Stefan Berger
2020-02-25 20:53 ` [PATCH v3 4/4] tpm: ibmvtpm: Add support for TPM 2 Stefan Berger
2020-02-27 0:26 [PATCH v3 0/4] Enable vTPM 2.0 for the IBM vTPM driver Stefan Berger
2020-02-27 0:26 ` [PATCH v3 1/4] tpm: of: Handle IBM,vtpm20 case when getting log parameters Stefan Berger
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