Ftrace logs can be captured by STM over TMC sink path. We can enable
ftrace logs along with HW trace of coresight component. The timestamp
of ftrace logs and hw traces will be in sync which helps to debug.

Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com>
---
 arch/arm64/configs/defconfig | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 362df9390263..979f6eeecf2b 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1588,6 +1588,12 @@ CONFIG_NVMEM_SNVS_LPGPR=y
 CONFIG_NVMEM_SPMI_SDAM=m
 CONFIG_NVMEM_SUNXI_SID=y
 CONFIG_NVMEM_UNIPHIER_EFUSE=y
+CONFIG_STM_PROTO_BASIC=m
+CONFIG_STM_PROTO_SYS_T=m
+CONFIG_STM_DUMMY=m
+CONFIG_STM_SOURCE_CONSOLE=m
+CONFIG_STM_SOURCE_HEARTBEAT=m
+CONFIG_STM_SOURCE_FTRACE=m
 CONFIG_FPGA=y
 CONFIG_FPGA_MGR_ALTERA_CVP=m
 CONFIG_FPGA_MGR_STRATIX10_SOC=m
@@ -1703,7 +1709,6 @@ CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_FS=y
 # CONFIG_SCHED_DEBUG is not set
 # CONFIG_DEBUG_PREEMPT is not set
-# CONFIG_FTRACE is not set
 CONFIG_CORESIGHT=m
 CONFIG_CORESIGHT_LINK_AND_SINK_TMC=m
 CONFIG_CORESIGHT_CATU=m
-- 
2.46.0

On 10/09/2024 11:21, Mao Jinlong wrote:
> Ftrace logs can be captured by STM over TMC sink path. We can enable
> ftrace logs along with HW trace of coresight component. The timestamp
> of ftrace logs and hw traces will be in sync which helps to debug.
> 
> Signed-off-by: Mao Jinlong <quic_jinlmao@quicinc.com>
> ---
>  arch/arm64/configs/defconfig | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 362df9390263..979f6eeecf2b 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -1588,6 +1588,12 @@ CONFIG_NVMEM_SNVS_LPGPR=y
>  CONFIG_NVMEM_SPMI_SDAM=m
>  CONFIG_NVMEM_SUNXI_SID=y
>  CONFIG_NVMEM_UNIPHIER_EFUSE=y
> +CONFIG_STM_PROTO_BASIC=m
> +CONFIG_STM_PROTO_SYS_T=m
> +CONFIG_STM_DUMMY=m
> +CONFIG_STM_SOURCE_CONSOLE=m
> +CONFIG_STM_SOURCE_HEARTBEAT=m
> +CONFIG_STM_SOURCE_FTRACE=m
>  CONFIG_FPGA=y
>  CONFIG_FPGA_MGR_ALTERA_CVP=m
>  CONFIG_FPGA_MGR_STRATIX10_SOC=m
> @@ -1703,7 +1709,6 @@ CONFIG_MAGIC_SYSRQ=y
>  CONFIG_DEBUG_FS=y
>  # CONFIG_SCHED_DEBUG is not set
>  # CONFIG_DEBUG_PREEMPT is not set
> -# CONFIG_FTRACE is not set

That's a user-visible symbol. You must select it explicitly.

Best regards,
Krzysztof