linux-kernel - [PATCH] Kernel selftests: Add check if tpm devices are supported

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Date:   Tue, 19 May 2020 00:39:34 +0300
From:   Nikita Sobolev <Nikita.Sobolev@...opsys.com>
To:     Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Tadeusz Struk <tadeusz.struk@...el.com>,
        Joey Pabalinas <joeypabalinas@...il.com>,
        Petr Vorel <petr.vorel@...il.com>,
        linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org,
        Jason Gunthorpe <jgg@...pe.ca>,
        Peter Huewe <peterhuewe@....de>,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        linux-snps-arc@...ts.infradead.org,
        Nikita Sobolev <Nikita.Sobolev@...opsys.com>
Subject: [PATCH] Kernel selftests: Add check if tpm devices are supported

tpm2 tests set uses /dev/tpm0 and /dev/tpmrm0 without check if they
are available. In case, when these devices are not available test
fails, but expected behaviour is test to be skipped.

Signed-off-by: Nikita Sobolev <Nikita.Sobolev@...opsys.com>
---
 tools/testing/selftests/tpm2/test_smoke.sh | 11 +++++++++--
 tools/testing/selftests/tpm2/test_space.sh |  9 ++++++++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/tpm2/test_smoke.sh b/tools/testing/selftests/tpm2/test_smoke.sh
index 8155c2ea7ccb..e55d3e400666 100755
--- a/tools/testing/selftests/tpm2/test_smoke.sh
+++ b/tools/testing/selftests/tpm2/test_smoke.sh
@@ -1,8 +1,15 @@
 #!/bin/bash
 # SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 
-python -m unittest -v tpm2_tests.SmokeTest
-python -m unittest -v tpm2_tests.AsyncTest
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if [ -f /dev/tpm0 ] ; then
+	python -m unittest -v tpm2_tests.SmokeTest
+	python -m unittest -v tpm2_tests.AsyncTest
+else
+	exit $ksft_skip
+fi
 
 CLEAR_CMD=$(which tpm2_clear)
 if [ -n $CLEAR_CMD ]; then
diff --git a/tools/testing/selftests/tpm2/test_space.sh b/tools/testing/selftests/tpm2/test_space.sh
index a6f5e346635e..180b469c53b4 100755
--- a/tools/testing/selftests/tpm2/test_space.sh
+++ b/tools/testing/selftests/tpm2/test_space.sh
@@ -1,4 +1,11 @@
 #!/bin/bash
 # SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 
-python -m unittest -v tpm2_tests.SpaceTest
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if [ -f /dev/tpmrm0 ] ; then
+	python -m unittest -v tpm2_tests.SpaceTest
+else
+	exit $ksft_skip
+fi
-- 
2.16.2