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| author | Carl Worth <carl@os.amperecomputing.com> | 2025-09-25 13:42:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-18 16:02:54 +0300 |
| commit | d0c9effd82f2c19b92acd07d357fac5f392d549a (patch) | |
| tree | 6a67f52ebe44f9992cfab27e883b9f7b054d1069 /include/linux | |
| parent | 131097fe8b7d0ddcf8fa29b02ae032b5e1bd20e5 (diff) | |
| download | linux-d0c9effd82f2c19b92acd07d357fac5f392d549a.tar.xz | |
coresight: tmc: add the handle of the event to the path
[ Upstream commit aaa5abcc9d44d2c8484f779ab46d242d774cabcb ]
The handle is essential for retrieving the AUX_EVENT of each CPU and is
required in perf mode. It has been added to the coresight_path so that
dependent devices can access it from the path when needed.
The existing bug can be reproduced with:
perf record -e cs_etm//k -C 0-9 dd if=/dev/zero of=/dev/null
Showing an oops as follows:
Unable to handle kernel paging request at virtual address 000f6e84934ed19e
Call trace:
tmc_etr_get_buffer+0x30/0x80 [coresight_tmc] (P)
catu_enable_hw+0xbc/0x3d0 [coresight_catu]
catu_enable+0x70/0xe0 [coresight_catu]
coresight_enable_path+0xb0/0x258 [coresight]
Fixes: 080ee83cc361 ("Coresight: Change functions to accept the coresight_path")
Signed-off-by: Carl Worth <carl@os.amperecomputing.com>
Reviewed-by: Leo Yan <leo.yan@arm.com>
Co-developed-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250925-fix_helper_data-v2-1-edd8a07c1646@oss.qualcomm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/coresight.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 6de59ce8ef8c..2626105e3719 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -332,12 +332,14 @@ static struct coresight_dev_list (var) = { \ /** * struct coresight_path - data needed by enable/disable path - * @path_list: path from source to sink. - * @trace_id: trace_id of the whole path. + * @path_list: path from source to sink. + * @trace_id: trace_id of the whole path. + * @handle: handle of the aux_event. */ struct coresight_path { - struct list_head path_list; - u8 trace_id; + struct list_head path_list; + u8 trace_id; + struct perf_output_handle *handle; }; enum cs_mode { |