From 5cb2ace90deb6df9c90172f904fb4a12ee4d443a Mon Sep 17 00:00:00 2001
From: Stefan Berger <stefanb@linux.ibm.com>
Date: Thu, 12 Mar 2020 11:53:30 -0400
Subject: [PATCH] tpm: of: Handle IBM,vtpm20 case when getting log parameters
References: jsc#SLE-13630 bsc#1179446 ltc#190030
Patch-mainline: v5.7-rc1
Git-commit: 5cb2ace90deb6df9c90172f904fb4a12ee4d443a
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: Nayna Jain <nayna@linux.ibm.com>
Tested-by: Nayna Jain <nayna@linux.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/char/tpm/eventlog/of.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/char/tpm/eventlog/of.c b/drivers/char/tpm/eventlog/of.c
index af347c190819..a9ce66d09a75 100644
--- a/drivers/char/tpm/eventlog/of.c
+++ b/drivers/char/tpm/eventlog/of.c
@@ -51,7 +51,8 @@ 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_property_match_string(np, "compatible", "IBM,vtpm") < 0 &&
+ of_property_match_string(np, "compatible", "IBM,vtpm20") < 0) {
size = be32_to_cpup((__force __be32 *)sizep);
base = be64_to_cpup((__force __be64 *)basep);
} else {
--
2.26.2