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tee: optee: add invoke_fn tracepoints

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Add tracepoints to retrieve information about the invoke_fn. This would
help to measure how many invoke_fn are triggered and how long it takes
to complete one invoke_fn call.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Jisheng Zhang 2021-02-10 14:44:09 +08:00 committed by Jens Wiklander
parent a38fd87484
commit 0101947dbc
2 changed files with 71 additions and 0 deletions
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4
drivers/tee/optee/call.c
View File

@ -14,6 +14,8 @@
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include "optee_private.h" #include "optee_private.h"
#include "optee_smc.h" #include "optee_smc.h"
#define CREATE_TRACE_POINTS
#include "optee_trace.h"
struct optee_call_waiter { struct optee_call_waiter {
struct list_head list_node; struct list_head list_node;
@ -138,9 +140,11 @@ u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg)
while (true) { while (true) {
struct arm_smccc_res res; struct arm_smccc_res res;
trace_optee_invoke_fn_begin(&param);
optee->invoke_fn(param.a0, param.a1, param.a2, param.a3, optee->invoke_fn(param.a0, param.a1, param.a2, param.a3,
param.a4, param.a5, param.a6, param.a7, param.a4, param.a5, param.a6, param.a7,
&res); &res);
trace_optee_invoke_fn_end(&param, &res);
if (res.a0 == OPTEE_SMC_RETURN_ETHREAD_LIMIT) { if (res.a0 == OPTEE_SMC_RETURN_ETHREAD_LIMIT) {
/* /*

67
drivers/tee/optee/optee_trace.h Normal file
View File

@ -0,0 +1,67 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* optee trace points
*
* Copyright (C) 2021 Synaptics Incorporated
* Author: Jisheng Zhang <jszhang@kernel.org>
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM optee
#if !defined(_TRACE_OPTEE_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_OPTEE_H
#include <linux/arm-smccc.h>
#include <linux/tracepoint.h>
#include "optee_private.h"
TRACE_EVENT(optee_invoke_fn_begin,
TP_PROTO(struct optee_rpc_param *param),
TP_ARGS(param),
TP_STRUCT__entry(
__field(void *, param)
__array(u32, args, 8)
),
TP_fast_assign(
__entry->param = param;
BUILD_BUG_ON(sizeof(*param) < sizeof(__entry->args));
memcpy(__entry->args, param, sizeof(__entry->args));
),
TP_printk("param=%p (%x, %x, %x, %x, %x, %x, %x, %x)", __entry->param,
__entry->args[0], __entry->args[1], __entry->args[2],
__entry->args[3], __entry->args[4], __entry->args[5],
__entry->args[6], __entry->args[7])
);
TRACE_EVENT(optee_invoke_fn_end,
TP_PROTO(struct optee_rpc_param *param, struct arm_smccc_res *res),
TP_ARGS(param, res),
TP_STRUCT__entry(
__field(void *, param)
__array(unsigned long, rets, 4)
),
TP_fast_assign(
__entry->param = param;
BUILD_BUG_ON(sizeof(*res) < sizeof(__entry->rets));
memcpy(__entry->rets, res, sizeof(__entry->rets));
),
TP_printk("param=%p ret (%lx, %lx, %lx, %lx)", __entry->param,
__entry->rets[0], __entry->rets[1], __entry->rets[2],
__entry->rets[3])
);
#endif /* _TRACE_OPTEE_H */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE optee_trace
/* This part must be outside protection */
#include <trace/define_trace.h>