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| author | Amirreza Zarrabi <amirreza.zarrabi@oss.qualcomm.com> | 2025-09-11 21:07:48 -0700 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2025-09-15 17:34:06 +0200 |
| commit | 0f7bfdcb7c37ae826ba6f1fde05d31040a97fd77 (patch) | |
| tree | b9064a258c8bdb6c98b38e936a142ef3d0433e19 /drivers/tee/qcomtee/core.c | |
| parent | d6e290837e50f73f88f31f19bd8a7213d92e6e46 (diff) | |
| download | linux-next-0f7bfdcb7c37ae826ba6f1fde05d31040a97fd77.tar.gz linux-next-0f7bfdcb7c37ae826ba6f1fde05d31040a97fd77.zip | |
tee: qcom: add primordial object
After booting, the kernel provides a static object known as the
primordial object. This object is utilized by QTEE for native
kernel services such as yield or privileged operations.
Acked-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Harshal Dev <quic_hdev@quicinc.com>
Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@oss.qualcomm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/qcomtee/core.c')
| -rw-r--r-- | drivers/tee/qcomtee/core.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/tee/qcomtee/core.c b/drivers/tee/qcomtee/core.c index b6931ed6f200..783acc59cfa9 100644 --- a/drivers/tee/qcomtee/core.c +++ b/drivers/tee/qcomtee/core.c @@ -31,10 +31,12 @@ int qcomtee_next_arg_type(struct qcomtee_arg *u, int i, } /* - * QTEE expects IDs with the QCOMTEE_MSG_OBJECT_NS_BIT set for objects - * of the QCOMTEE_OBJECT_TYPE_CB type. + * QTEE expects IDs with QCOMTEE_MSG_OBJECT_NS_BIT set for objects of + * QCOMTEE_OBJECT_TYPE_CB type. The first ID with QCOMTEE_MSG_OBJECT_NS_BIT + * set is reserved for the primordial object. */ -#define QCOMTEE_OBJECT_ID_START (QCOMTEE_MSG_OBJECT_NS_BIT + 1) +#define QCOMTEE_OBJECT_PRIMORDIAL (QCOMTEE_MSG_OBJECT_NS_BIT) +#define QCOMTEE_OBJECT_ID_START (QCOMTEE_OBJECT_PRIMORDIAL + 1) #define QCOMTEE_OBJECT_ID_END (U32_MAX) #define QCOMTEE_OBJECT_SET(p, type, ...) \ @@ -157,7 +159,9 @@ static void qcomtee_object_release(struct kref *refcount) */ int qcomtee_object_get(struct qcomtee_object *object) { - if (object != NULL_QCOMTEE_OBJECT && object != ROOT_QCOMTEE_OBJECT) + if (object != &qcomtee_primordial_object && + object != NULL_QCOMTEE_OBJECT && + object != ROOT_QCOMTEE_OBJECT) return kref_get_unless_zero(&object->refcount); return 0; @@ -169,7 +173,9 @@ int qcomtee_object_get(struct qcomtee_object *object) */ void qcomtee_object_put(struct qcomtee_object *object) { - if (object != NULL_QCOMTEE_OBJECT && object != ROOT_QCOMTEE_OBJECT) + if (object != &qcomtee_primordial_object && + object != NULL_QCOMTEE_OBJECT && + object != ROOT_QCOMTEE_OBJECT) kref_put(&object->refcount, qcomtee_object_release); } @@ -261,6 +267,9 @@ qcomtee_local_object_get(struct qcomtee_object_invoke_ctx *oic, struct qcomtee *qcomtee = tee_get_drvdata(oic->ctx->teedev); struct qcomtee_object *object; + if (object_id == QCOMTEE_OBJECT_PRIMORDIAL) + return &qcomtee_primordial_object; + guard(rcu)(); object = xa_load(&qcomtee->xa_local_objects, object_id); /* It already checks for %NULL_QCOMTEE_OBJECT. */ |