* [PATCH] tee: optee: add invoke_fn tracepoints
@ 2021-02-10 6:44 Jisheng Zhang
2021-02-10 14:37 ` Steven Rostedt
` (2 more replies)
0 siblings, 3 replies; 14+ messages in thread
From: Jisheng Zhang @ 2021-02-10 6:44 UTC (permalink / raw)
To: Jens Wiklander, Steven Rostedt (VMware)
Cc: linux-kernel, op-tee, linux-arm-kernel
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>
---
Since v1:
- add BUILD_BUG_ON() macro usage to make sure that the size of what is being
copied, is not smaller than the amount being copied. Thank Steve.
- move optee_trace.h to keep include headers sorted
drivers/tee/optee/call.c | 4 ++
drivers/tee/optee/optee_trace.h | 67 +++++++++++++++++++++++++++++++++
2 files changed, 71 insertions(+)
create mode 100644 drivers/tee/optee/optee_trace.h
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index 780d7c4fd756..0da6fe50f1af 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -14,6 +14,8 @@
#include <linux/uaccess.h>
#include "optee_private.h"
#include "optee_smc.h"
+#define CREATE_TRACE_POINTS
+#include "optee_trace.h"
struct optee_call_waiter {
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) {
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..7c954eefa4bf
--- /dev/null
+++ b/drivers/tee/optee/optee_trace.h
@@ -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>
--
2.30.0
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-10 6:44 [PATCH] tee: optee: add invoke_fn tracepoints Jisheng Zhang
@ 2021-02-10 14:37 ` Steven Rostedt
2021-02-23 7:59 ` Jens Wiklander
2021-03-24 14:34 ` Guenter Roeck
2 siblings, 0 replies; 14+ messages in thread
From: Steven Rostedt @ 2021-02-10 14:37 UTC (permalink / raw)
To: Jisheng Zhang; +Cc: Jens Wiklander, linux-kernel, op-tee, linux-arm-kernel
On Wed, 10 Feb 2021 14:44:09 +0800
Jisheng Zhang <Jisheng.Zhang@synaptics.com> wrote:
> 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>
> ---
>
> Since v1:
> - add BUILD_BUG_ON() macro usage to make sure that the size of what is being
> copied, is not smaller than the amount being copied. Thank Steve.
> - move optee_trace.h to keep include headers sorted
From a tracing point of view:
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
-- Steve
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-10 6:44 [PATCH] tee: optee: add invoke_fn tracepoints Jisheng Zhang
2021-02-10 14:37 ` Steven Rostedt
@ 2021-02-23 7:59 ` Jens Wiklander
2021-02-23 10:40 ` Jisheng Zhang
2021-03-24 14:34 ` Guenter Roeck
2 siblings, 1 reply; 14+ messages in thread
From: Jens Wiklander @ 2021-02-23 7:59 UTC (permalink / raw)
To: Jisheng Zhang
Cc: Steven Rostedt (VMware), Linux Kernel Mailing List, op-tee, Linux ARM
Hi Jisheng,
On Wed, Feb 10, 2021 at 7:44 AM Jisheng Zhang
<Jisheng.Zhang@synaptics.com> wrote:
>
> 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>
> ---
>
> Since v1:
> - add BUILD_BUG_ON() macro usage to make sure that the size of what is being
> copied, is not smaller than the amount being copied. Thank Steve.
> - move optee_trace.h to keep include headers sorted
>
> drivers/tee/optee/call.c | 4 ++
> drivers/tee/optee/optee_trace.h | 67 +++++++++++++++++++++++++++++++++
> 2 files changed, 71 insertions(+)
> create mode 100644 drivers/tee/optee/optee_trace.h
>
> diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
> index 780d7c4fd756..0da6fe50f1af 100644
> --- a/drivers/tee/optee/call.c
> +++ b/drivers/tee/optee/call.c
> @@ -14,6 +14,8 @@
> #include <linux/uaccess.h>
> #include "optee_private.h"
> #include "optee_smc.h"
> +#define CREATE_TRACE_POINTS
> +#include "optee_trace.h"
>
> struct optee_call_waiter {
> 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) {
> 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..7c954eefa4bf
> --- /dev/null
> +++ b/drivers/tee/optee/optee_trace.h
> @@ -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"
> +
Checkpatch has some complaints below. Is that something that could be
fixed or is this so far from regular C-syntax that we don't care?
Thanks,
Jens
> +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>
> --
> 2.30.0
>
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-23 7:59 ` Jens Wiklander
@ 2021-02-23 10:40 ` Jisheng Zhang
2021-02-23 13:11 ` Jens Wiklander
0 siblings, 1 reply; 14+ messages in thread
From: Jisheng Zhang @ 2021-02-23 10:40 UTC (permalink / raw)
To: Jens Wiklander
Cc: Steven Rostedt (VMware), Linux Kernel Mailing List, op-tee, Linux ARM
On Tue, 23 Feb 2021 08:59:22 +0100 Jens Wiklander wrote:
>
> Hi Jisheng,
Hi Jens,
>
> On Wed, Feb 10, 2021 at 7:44 AM Jisheng Zhang
> <Jisheng.Zhang@synaptics.com> wrote:
> >
> > 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>
> > ---
> >
> > Since v1:
> > - add BUILD_BUG_ON() macro usage to make sure that the size of what is being
> > copied, is not smaller than the amount being copied. Thank Steve.
> > - move optee_trace.h to keep include headers sorted
> >
> > drivers/tee/optee/call.c | 4 ++
> > drivers/tee/optee/optee_trace.h | 67 +++++++++++++++++++++++++++++++++
> > 2 files changed, 71 insertions(+)
> > create mode 100644 drivers/tee/optee/optee_trace.h
> >
> > diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
> > index 780d7c4fd756..0da6fe50f1af 100644
> > --- a/drivers/tee/optee/call.c
> > +++ b/drivers/tee/optee/call.c
> > @@ -14,6 +14,8 @@
> > #include <linux/uaccess.h>
> > #include "optee_private.h"
> > #include "optee_smc.h"
> > +#define CREATE_TRACE_POINTS
> > +#include "optee_trace.h"
> >
> > struct optee_call_waiter {
> > 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) {
> > 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..7c954eefa4bf
> > --- /dev/null
> > +++ b/drivers/tee/optee/optee_trace.h
> > @@ -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"
> > +
>
> Checkpatch has some complaints below. Is that something that could be
> fixed or is this so far from regular C-syntax that we don't care?
I tried ./scripts/checkpatch.pl in Linus tree to check the patch, there's
no any error, and except the "MAINTAINERS need updating" warning, there's
no other warnings.
git log -- scripts/checkpatch.pl
shows the latest checkpatch.pl is at commit 62137364e3e8afcc745846c5c67cacf943149073
I'm not sure what happened.
Thanks
>
> Thanks,
> Jens
>
> > +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>
> > --
> > 2.30.0
> >
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-23 10:40 ` Jisheng Zhang
@ 2021-02-23 13:11 ` Jens Wiklander
2021-02-23 14:19 ` Steven Rostedt
0 siblings, 1 reply; 14+ messages in thread
From: Jens Wiklander @ 2021-02-23 13:11 UTC (permalink / raw)
To: Jisheng Zhang
Cc: Steven Rostedt (VMware), Linux Kernel Mailing List, op-tee, Linux ARM
On Tue, Feb 23, 2021 at 06:40:26PM +0800, Jisheng Zhang wrote:
> On Tue, 23 Feb 2021 08:59:22 +0100 Jens Wiklander wrote:
>
>
> >
> > Hi Jisheng,
>
> Hi Jens,
>
> >
> > On Wed, Feb 10, 2021 at 7:44 AM Jisheng Zhang
> > <Jisheng.Zhang@synaptics.com> wrote:
> > >
> > > 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>
> > > ---
> > >
> > > Since v1:
> > > - add BUILD_BUG_ON() macro usage to make sure that the size of what is being
> > > copied, is not smaller than the amount being copied. Thank Steve.
> > > - move optee_trace.h to keep include headers sorted
> > >
> > > drivers/tee/optee/call.c | 4 ++
> > > drivers/tee/optee/optee_trace.h | 67 +++++++++++++++++++++++++++++++++
> > > 2 files changed, 71 insertions(+)
> > > create mode 100644 drivers/tee/optee/optee_trace.h
> > >
[snip]
> > > diff --git a/drivers/tee/optee/optee_trace.h b/drivers/tee/optee/optee_trace.h
> > > new file mode 100644
> > > index 000000000000..7c954eefa4bf
> > > --- /dev/null
> > > +++ b/drivers/tee/optee/optee_trace.h
> > > @@ -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"
> > > +
> >
> > Checkpatch has some complaints below. Is that something that could be
> > fixed or is this so far from regular C-syntax that we don't care?
>
> I tried ./scripts/checkpatch.pl in Linus tree to check the patch, there's
> no any error, and except the "MAINTAINERS need updating" warning, there's
> no other warnings.
>
> git log -- scripts/checkpatch.pl
> shows the latest checkpatch.pl is at commit 62137364e3e8afcc745846c5c67cacf943149073
>
> I'm not sure what happened.
I used the -strict option.
./scripts/checkpatch.pl -strict 0001-tee-optee-add-invoke_fn-tracepoints.patch
WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#44:
new file mode 100644
CHECK: Alignment should match open parenthesis
#68: FILE: drivers/tee/optee/optee_trace.h:20:
+TRACE_EVENT(optee_invoke_fn_begin,
+ TP_PROTO(struct optee_rpc_param *param),
CHECK: Lines should not end with a '('
#71: FILE: drivers/tee/optee/optee_trace.h:23:
+ TP_STRUCT__entry(
CHECK: Lines should not end with a '('
#76: FILE: drivers/tee/optee/optee_trace.h:28:
+ TP_fast_assign(
CHECK: Alignment should match open parenthesis
#89: FILE: drivers/tee/optee/optee_trace.h:41:
+TRACE_EVENT(optee_invoke_fn_end,
+ TP_PROTO(struct optee_rpc_param *param, struct arm_smccc_res *res),
CHECK: Lines should not end with a '('
#92: FILE: drivers/tee/optee/optee_trace.h:44:
+ TP_STRUCT__entry(
CHECK: Lines should not end with a '('
#97: FILE: drivers/tee/optee/optee_trace.h:49:
+ TP_fast_assign(
total: 0 errors, 1 warnings, 6 checks, 86 lines checked
Thanks,
Jens
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-23 13:11 ` Jens Wiklander
@ 2021-02-23 14:19 ` Steven Rostedt
2021-02-24 8:10 ` Jens Wiklander
0 siblings, 1 reply; 14+ messages in thread
From: Steven Rostedt @ 2021-02-23 14:19 UTC (permalink / raw)
To: Jens Wiklander
Cc: Jisheng Zhang, Linux Kernel Mailing List, op-tee, Linux ARM
On Tue, 23 Feb 2021 14:11:24 +0100
Jens Wiklander <jens.wiklander@linaro.org> wrote:
> I used the -strict option.
>
> ./scripts/checkpatch.pl -strict 0001-tee-optee-add-invoke_fn-tracepoints.patch
> WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
> #44:
> new file mode 100644
The above is just asking for someone to take maintainership of the new file.
>
> CHECK: Alignment should match open parenthesis
> #68: FILE: drivers/tee/optee/optee_trace.h:20:
> +TRACE_EVENT(optee_invoke_fn_begin,
> + TP_PROTO(struct optee_rpc_param *param),
>
> CHECK: Lines should not end with a '('
> #71: FILE: drivers/tee/optee/optee_trace.h:23:
> + TP_STRUCT__entry(
>
> CHECK: Lines should not end with a '('
> #76: FILE: drivers/tee/optee/optee_trace.h:28:
> + TP_fast_assign(
>
> CHECK: Alignment should match open parenthesis
> #89: FILE: drivers/tee/optee/optee_trace.h:41:
> +TRACE_EVENT(optee_invoke_fn_end,
> + TP_PROTO(struct optee_rpc_param *param, struct arm_smccc_res *res),
>
> CHECK: Lines should not end with a '('
> #92: FILE: drivers/tee/optee/optee_trace.h:44:
> + TP_STRUCT__entry(
>
> CHECK: Lines should not end with a '('
> #97: FILE: drivers/tee/optee/optee_trace.h:49:
> + TP_fast_assign(
The TRACE_EVENT() macro is "special", and checkpatch notoriously stumbles
over it. I usually recommend that people ignore the checkpatch warnings on
TRACE_EVENT() macros.
-- Steve
>
> total: 0 errors, 1 warnings, 6 checks, 86 lines checked
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-23 14:19 ` Steven Rostedt
@ 2021-02-24 8:10 ` Jens Wiklander
0 siblings, 0 replies; 14+ messages in thread
From: Jens Wiklander @ 2021-02-24 8:10 UTC (permalink / raw)
To: Steven Rostedt
Cc: Jisheng Zhang, Linux Kernel Mailing List, op-tee, Linux ARM
On Tue, Feb 23, 2021 at 09:19:36AM -0500, Steven Rostedt wrote:
> On Tue, 23 Feb 2021 14:11:24 +0100
> Jens Wiklander <jens.wiklander@linaro.org> wrote:
>
> > I used the -strict option.
> >
> > ./scripts/checkpatch.pl -strict 0001-tee-optee-add-invoke_fn-tracepoints.patch
> > WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
> > #44:
> > new file mode 100644
>
> The above is just asking for someone to take maintainership of the new file.
>
> >
> > CHECK: Alignment should match open parenthesis
> > #68: FILE: drivers/tee/optee/optee_trace.h:20:
> > +TRACE_EVENT(optee_invoke_fn_begin,
> > + TP_PROTO(struct optee_rpc_param *param),
> >
> > CHECK: Lines should not end with a '('
> > #71: FILE: drivers/tee/optee/optee_trace.h:23:
> > + TP_STRUCT__entry(
> >
> > CHECK: Lines should not end with a '('
> > #76: FILE: drivers/tee/optee/optee_trace.h:28:
> > + TP_fast_assign(
> >
> > CHECK: Alignment should match open parenthesis
> > #89: FILE: drivers/tee/optee/optee_trace.h:41:
> > +TRACE_EVENT(optee_invoke_fn_end,
> > + TP_PROTO(struct optee_rpc_param *param, struct arm_smccc_res *res),
> >
> > CHECK: Lines should not end with a '('
> > #92: FILE: drivers/tee/optee/optee_trace.h:44:
> > + TP_STRUCT__entry(
> >
> > CHECK: Lines should not end with a '('
> > #97: FILE: drivers/tee/optee/optee_trace.h:49:
> > + TP_fast_assign(
>
> The TRACE_EVENT() macro is "special", and checkpatch notoriously stumbles
> over it. I usually recommend that people ignore the checkpatch warnings on
> TRACE_EVENT() macros.
Makes sense. I'll pick this up as it is.
Thanks,
Jens
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-10 6:44 [PATCH] tee: optee: add invoke_fn tracepoints Jisheng Zhang
2021-02-10 14:37 ` Steven Rostedt
2021-02-23 7:59 ` Jens Wiklander
@ 2021-03-24 14:34 ` Guenter Roeck
2021-03-24 14:48 ` Guenter Roeck
2 siblings, 1 reply; 14+ messages in thread
From: Guenter Roeck @ 2021-03-24 14:34 UTC (permalink / raw)
To: Jisheng Zhang
Cc: Jens Wiklander, Steven Rostedt (VMware),
linux-kernel, op-tee, linux-arm-kernel
On Wed, Feb 10, 2021 at 02:44:09PM +0800, Jisheng Zhang wrote:
> 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>
arm64:defconfig:
make-arm64 -j drivers/tee/optee/call.o
CALL scripts/atomic/check-atomics.sh
CALL scripts/checksyscalls.sh
CC drivers/tee/optee/call.o
In file included from drivers/tee/optee/optee_trace.h:67,
from drivers/tee/optee/call.c:18:
./include/trace/define_trace.h:95:42: fatal error: ./optee_trace.h: No such file or directory
95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
| ^
compilation terminated.
Guenter
^ permalink raw reply [flat|nested] 14+ messages in thread* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-03-24 14:34 ` Guenter Roeck
@ 2021-03-24 14:48 ` Guenter Roeck
2021-03-24 14:53 ` Steven Rostedt
0 siblings, 1 reply; 14+ messages in thread
From: Guenter Roeck @ 2021-03-24 14:48 UTC (permalink / raw)
To: Jisheng Zhang
Cc: Jens Wiklander, Steven Rostedt (VMware),
linux-kernel, op-tee, linux-arm-kernel
On Wed, Mar 24, 2021 at 07:34:07AM -0700, Guenter Roeck wrote:
> On Wed, Feb 10, 2021 at 02:44:09PM +0800, Jisheng Zhang wrote:
> > 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>
>
> arm64:defconfig:
>
> make-arm64 -j drivers/tee/optee/call.o
> CALL scripts/atomic/check-atomics.sh
> CALL scripts/checksyscalls.sh
> CC drivers/tee/optee/call.o
> In file included from drivers/tee/optee/optee_trace.h:67,
> from drivers/tee/optee/call.c:18:
> ./include/trace/define_trace.h:95:42: fatal error: ./optee_trace.h: No such file or directory
> 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
> | ^
> compilation terminated.
>
The problem also affects arm:imx_v6_v7_defconfig.
Guenter
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-03-24 14:48 ` Guenter Roeck
@ 2021-03-24 14:53 ` Steven Rostedt
2021-03-25 3:50 ` Jisheng Zhang
0 siblings, 1 reply; 14+ messages in thread
From: Steven Rostedt @ 2021-03-24 14:53 UTC (permalink / raw)
To: Guenter Roeck
Cc: Jisheng Zhang, Jens Wiklander, linux-kernel, op-tee, linux-arm-kernel
On Wed, 24 Mar 2021 07:48:53 -0700
Guenter Roeck <linux@roeck-us.net> wrote:
> On Wed, Mar 24, 2021 at 07:34:07AM -0700, Guenter Roeck wrote:
> > On Wed, Feb 10, 2021 at 02:44:09PM +0800, Jisheng Zhang wrote:
> > > 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>
> >
> > arm64:defconfig:
> >
> > make-arm64 -j drivers/tee/optee/call.o
> > CALL scripts/atomic/check-atomics.sh
> > CALL scripts/checksyscalls.sh
> > CC drivers/tee/optee/call.o
> > In file included from drivers/tee/optee/optee_trace.h:67,
> > from drivers/tee/optee/call.c:18:
> > ./include/trace/define_trace.h:95:42: fatal error: ./optee_trace.h: No such file or directory
> > 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
> > | ^
> > compilation terminated.
> >
>
> The problem also affects arm:imx_v6_v7_defconfig.
>
I think it affects everything. The problem is that the
drivers/tee/optee/Makefile needs to be updated with:
CFLAGS_call.o := -I$(src)
otherwise the compiler wont know how to find the path to optee_tree.h.
This is described in:
samples/trace_events/Makefile
-- Steve
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-03-24 14:53 ` Steven Rostedt
@ 2021-03-25 3:50 ` Jisheng Zhang
2021-03-25 7:49 ` Jens Wiklander
0 siblings, 1 reply; 14+ messages in thread
From: Jisheng Zhang @ 2021-03-25 3:50 UTC (permalink / raw)
To: Steven Rostedt
Cc: Guenter Roeck, Jens Wiklander, linux-kernel, op-tee, linux-arm-kernel
On Wed, 24 Mar 2021 10:53:13 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:
>
> On Wed, 24 Mar 2021 07:48:53 -0700
> Guenter Roeck <linux@roeck-us.net> wrote:
>
> > On Wed, Mar 24, 2021 at 07:34:07AM -0700, Guenter Roeck wrote:
> > > On Wed, Feb 10, 2021 at 02:44:09PM +0800, Jisheng Zhang wrote:
> > > > 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>
> > >
> > > arm64:defconfig:
> > >
> > > make-arm64 -j drivers/tee/optee/call.o
> > > CALL scripts/atomic/check-atomics.sh
> > > CALL scripts/checksyscalls.sh
> > > CC drivers/tee/optee/call.o
> > > In file included from drivers/tee/optee/optee_trace.h:67,
> > > from drivers/tee/optee/call.c:18:
> > > ./include/trace/define_trace.h:95:42: fatal error: ./optee_trace.h: No such file or directory
> > > 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
> > > | ^
> > > compilation terminated.
Interesting, I always build linux kernel with "O=", didn't see such build error
and IIRC, we didn't receive any lkp robot build error report.
My steps are:
mkdir /tmp/test
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- O=/tmp/test defconfig
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- O=/tmp/test drivers/tee/optee/
Today, I tried to build the linux kernel w/o "O=...", I reproduced this error!
This is the first time I saw "O=" make a different behavior.
I'll send out a patch to fix it.
Thanks
> > >
> >
> > The problem also affects arm:imx_v6_v7_defconfig.
> >
>
> I think it affects everything. The problem is that the
> drivers/tee/optee/Makefile needs to be updated with:
>
> CFLAGS_call.o := -I$(src)
>
> otherwise the compiler wont know how to find the path to optee_tree.h.
>
> This is described in:
>
> samples/trace_events/Makefile
Thank Steven for pointing this out.
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-03-25 3:50 ` Jisheng Zhang
@ 2021-03-25 7:49 ` Jens Wiklander
0 siblings, 0 replies; 14+ messages in thread
From: Jens Wiklander @ 2021-03-25 7:49 UTC (permalink / raw)
To: Jisheng Zhang
Cc: Steven Rostedt, Guenter Roeck, Linux Kernel Mailing List,
OP-TEE TrustedFirmware, Linux ARM
On Thu, Mar 25, 2021 at 3:50 AM Jisheng Zhang
<Jisheng.Zhang@synaptics.com> wrote:
>
> On Wed, 24 Mar 2021 10:53:13 -0400
> Steven Rostedt <rostedt@goodmis.org> wrote:
>
>
> >
> > On Wed, 24 Mar 2021 07:48:53 -0700
> > Guenter Roeck <linux@roeck-us.net> wrote:
> >
> > > On Wed, Mar 24, 2021 at 07:34:07AM -0700, Guenter Roeck wrote:
> > > > On Wed, Feb 10, 2021 at 02:44:09PM +0800, Jisheng Zhang wrote:
> > > > > 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>
> > > >
> > > > arm64:defconfig:
> > > >
> > > > make-arm64 -j drivers/tee/optee/call.o
> > > > CALL scripts/atomic/check-atomics.sh
> > > > CALL scripts/checksyscalls.sh
> > > > CC drivers/tee/optee/call.o
> > > > In file included from drivers/tee/optee/optee_trace.h:67,
> > > > from drivers/tee/optee/call.c:18:
> > > > ./include/trace/define_trace.h:95:42: fatal error: ./optee_trace.h: No such file or directory
> > > > 95 | #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
> > > > | ^
> > > > compilation terminated.
>
> Interesting, I always build linux kernel with "O=", didn't see such build error
> and IIRC, we didn't receive any lkp robot build error report.
>
> My steps are:
>
> mkdir /tmp/test
>
> make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- O=/tmp/test defconfig
>
> make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- O=/tmp/test drivers/tee/optee/
>
> Today, I tried to build the linux kernel w/o "O=...", I reproduced this error!
> This is the first time I saw "O=" make a different behavior.
I'm also compiling with O=... and couldn't understand what was going
on. Thanks for saving me from digging any deeper.
>
> I'll send out a patch to fix it.
Thanks,
Jens
^ permalink raw reply [flat|nested] 14+ messages in thread
* [PATCH] tee: optee: add invoke_fn tracepoints
@ 2021-02-09 11:02 Jisheng Zhang
2021-02-09 15:58 ` Steven Rostedt
0 siblings, 1 reply; 14+ messages in thread
From: Jisheng Zhang @ 2021-02-09 11:02 UTC (permalink / raw)
To: Jens Wiklander, op-tee; +Cc: linux-kernel, Steven Rostedt, linux-arm-kernel
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>
---
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.h
diff --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));
+ ),
+
+ 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));
+ ),
+
+ 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>
--
2.30.0
^ permalink raw reply related [flat|nested] 14+ messages in thread* Re: [PATCH] tee: optee: add invoke_fn tracepoints
2021-02-09 11:02 Jisheng Zhang
@ 2021-02-09 15:58 ` Steven Rostedt
0 siblings, 0 replies; 14+ messages in thread
From: Steven Rostedt @ 2021-02-09 15:58 UTC (permalink / raw)
To: Jisheng Zhang; +Cc: Jens Wiklander, op-tee, linux-kernel, linux-arm-kernel
On Tue, 9 Feb 2021 19:02:15 +0800
Jisheng Zhang <Jisheng.Zhang@synaptics.com> wrote:
> 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>
> ---
> 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.h
>
> diff --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>
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2021-03-25 7:51 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-02-10 6:44 [PATCH] tee: optee: add invoke_fn tracepoints Jisheng Zhang
2021-02-10 14:37 ` Steven Rostedt
2021-02-23 7:59 ` Jens Wiklander
2021-02-23 10:40 ` Jisheng Zhang
2021-02-23 13:11 ` Jens Wiklander
2021-02-23 14:19 ` Steven Rostedt
2021-02-24 8:10 ` Jens Wiklander
2021-03-24 14:34 ` Guenter Roeck
2021-03-24 14:48 ` Guenter Roeck
2021-03-24 14:53 ` Steven Rostedt
2021-03-25 3:50 ` Jisheng Zhang
2021-03-25 7:49 ` Jens Wiklander
-- strict thread matches above, loose matches on Subject: below --
2021-02-09 11:02 Jisheng Zhang
2021-02-09 15:58 ` Steven Rostedt
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).