This patch-set updates the cxl adapter probe procedure to selectively enable PSL-traces at the end of a successful probe for a PSL9 based adapter. This would let implementors of AFUs that use in-kernel apis to interact with the CXL adapter get early debug data.
This feature is controlled via a new module parameter named 'enable_psltrace' which is enabled by default. During adapter probe is this parameter is set cxl will start PSL-traces on the adapter via PSL_TRACECFG register. The needed sequence values written to the register was provided by the PSL h/w team. This patch set is based on an earlier patch titled "cxl: Remove function write_timebase_ctrl_psl9() for PSL9" available at [1]. Ref: [1] http://patchwork.ozlabs.org/patch/871199/ Vaibhav Jain (3): cxl: Introduce various enums/defines for PSL9 trace arrays cxl: Introduce module parameter 'enable_psltrace' cxl: Provide implementation for sl_ops.start_psltrace on PSL9 drivers/misc/cxl/cxl.h | 31 ++++++++++++++-- drivers/misc/cxl/main.c | 4 +++ drivers/misc/cxl/native.c | 8 ++--- drivers/misc/cxl/pci.c | 91 ++++++++++++++++++++++++++++++++++++++++++----- 4 files changed, 119 insertions(+), 15 deletions(-) -- 2.14.3
