Re: [PATCH] tee: optee: add invoke_fn tracepoints
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2021-02-09 15:59:32
Also in:
lkml, op-tee
On Tue, 9 Feb 2021 19:02:15 +0800 Jisheng Zhang [off-list ref] wrote:
quoted hunk ↗ jump to hunk
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 <redacted> --- drivers/tee/optee/call.c | 4 ++ drivers/tee/optee/optee_trace.h | 65 +++++++++++++++++++++++++++++++++ 2 files changed, 69 insertions(+) create mode 100644 drivers/tee/optee/optee_trace.hdiff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index 780d7c4fd756..9dbab10e7ac3 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c@@ -12,6 +12,8 @@ #include <linux/tee_drv.h> #include <linux/types.h> #include <linux/uaccess.h> +#define CREATE_TRACE_POINTS +#include "optee_trace.h" #include "optee_private.h" #include "optee_smc.h"@@ -138,9 +140,11 @@ u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg) while (true) { struct arm_smccc_res res; + trace_optee_invoke_fn_begin(¶m); optee->invoke_fn(param.a0, param.a1, param.a2, param.a3, param.a4, param.a5, param.a6, param.a7, &res); + trace_optee_invoke_fn_end(¶m, &res); if (res.a0 == OPTEE_SMC_RETURN_ETHREAD_LIMIT) { /*diff --git a/drivers/tee/optee/optee_trace.h b/drivers/tee/optee/optee_trace.h new file mode 100644 index 000000000000..f209df7004c2 --- /dev/null +++ b/drivers/tee/optee/optee_trace.h@@ -0,0 +1,65 @@ +/* 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; + memcpy(__entry->args, param, sizeof(__entry->args));
I wonder if you should add a: BUILD_BUG_ON(sizeof(param) < sizeof(__entry->args)); here.
+ ),
+
+ 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;
+ memcpy(__entry->rets, res, sizeof(__entry->rets));and a: BUILD_BUG_ON(sizeof(res) < sizeof(__entry->rets)); here Just to make sure that the size of what is being copied, is not smaller than the amount being copied. -- Steve
+ ),
+
+ 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>_______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel