This set extends the configfs support to allow loading and unloading of configurations as binary files via configfs.
Additional attributes - load and unload are provided to in the /config/cs-syscfg subsytem base group to implement the load functionality.
Routines to generate binary configuration files are supplied in ./tools/coresight.
Example generator and reader applications are provided.
Tools may be cross compiled or built for use on host system.
Documentation is updated to describe feature usage.
Changes since v4: 1) Update coresight/next - 6.1-rc3 2) Update to lockdep fixes to avoid read lock race in configfs.
Changes since v3: 1) Rebase & tested on coresight/next - 5.19-rc3 - which includes the fix patch for earlier configfs works. 2) Lockdep investigations resulted in re-design of some of the code accessing configfs. 3) moved load and unload attributes to root of cs-syscfg. (Mathieu) 4) Additional minor fixes suggested by Mathieu. 5) Memory for configfs loaded and unloaded configurations is now explicitly freed. 6) LOCKDEP nesting fix for configfs base code (fs/configfs/dir.c)
Changes since v2: 1) Rebased & tested on coresight/next - 5.18-rc2 2) Moved coresight config generator and reader programs from samples to tools/coresight. Docs updated to match. (suggested by Mathieu) 3) userspace builds now use userspace headers from tools/... 4) Other minor fixes from Mathieu's review.
Changes since v1: 1) Rebased to coresight/next - 5.16-rc1 with previous coresight config set applied. 2) Makefile.host fixed to default to all target.
Mike Leach (6): coresight: configfs: Update memory allocation / free for configfs elements coresight: configfs: Add in functionality for load via configfs coresight: configfs: Add in binary attributes to load files coresight: configfs: Modify config files to allow userspace use coresight: tools: Add config file write and reader tools Documentation: coresight: docs for config load via configfs
.../trace/coresight/coresight-config.rst | 202 +++++- MAINTAINERS | 1 + drivers/hwtracing/coresight/Makefile | 2 +- .../coresight/coresight-config-file.c | 583 ++++++++++++++++++ .../coresight/coresight-config-file.h | 139 +++++ .../hwtracing/coresight/coresight-config.h | 27 + .../coresight/coresight-syscfg-configfs.c | 361 +++++++++-- .../coresight/coresight-syscfg-configfs.h | 4 + .../hwtracing/coresight/coresight-syscfg.c | 137 +++- .../hwtracing/coresight/coresight-syscfg.h | 6 +- tools/coresight/Makefile | 52 ++ tools/coresight/coresight-cfg-bufw.c | 309 ++++++++++ tools/coresight/coresight-cfg-bufw.h | 26 + tools/coresight/coresight-cfg-example1.c | 62 ++ tools/coresight/coresight-cfg-example2.c | 95 +++ tools/coresight/coresight-cfg-examples.h | 22 + tools/coresight/coresight-cfg-file-gen.c | 61 ++ tools/coresight/coresight-cfg-file-read.c | 227 +++++++ tools/coresight/coresight-config-uapi.h | 76 +++ 19 files changed, 2339 insertions(+), 53 deletions(-) create mode 100644 drivers/hwtracing/coresight/coresight-config-file.c create mode 100644 drivers/hwtracing/coresight/coresight-config-file.h create mode 100644 tools/coresight/Makefile create mode 100644 tools/coresight/coresight-cfg-bufw.c create mode 100644 tools/coresight/coresight-cfg-bufw.h create mode 100644 tools/coresight/coresight-cfg-example1.c create mode 100644 tools/coresight/coresight-cfg-example2.c create mode 100644 tools/coresight/coresight-cfg-examples.h create mode 100644 tools/coresight/coresight-cfg-file-gen.c create mode 100644 tools/coresight/coresight-cfg-file-read.c create mode 100644 tools/coresight/coresight-config-uapi.h