linux-kernel - [PATCH v2] tee: optee: log message if dynamic shm is enabled

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Message-ID: <CAHqM-Qjr+5T1pMatJ=5MSsJvzaRqPybt_2TtyzHPwLnt=WjCEA@mail.gmail.com>
Date:   Tue, 11 Sep 2018 18:09:02 +0900
From:   Victor Chong <victor.chong@...aro.org>
To:     Jens Wiklander <jens.wiklander@...aro.org>
Cc:     tee-dev@...ts.linaro.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2] tee: optee: log message if dynamic shm is enabled

When dynamic shared memory support is enabled in the OP-TEE Trusted
OS, it doesn't mean that the driver supports it, which can confuse
users during debugging. Log a message when dynamic shared memory is
enabled in the driver, to let users know for sure.

Suggested-by: Jerome Forissier <jerome.forissier@...aro.org>
Signed-off-by: Victor Chong <victor.chong@...aro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@...aro.org>
---

v2:
* Added patch description

[v1] lore.kernel.org/patchwork/patch/983949/

 drivers/tee/optee/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
index e1aafe842d66..cca5c091e55a 100644
--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -631,6 +631,9 @@ static struct optee *optee_probe(struct device_node *np)

        optee_enable_shm_cache(optee);

+       if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
+               pr_info("dynamic shared memory is enabled\n");
+
        pr_info("initialized driver\n");
        return optee;
 err:
--
2.17.1