Add documentation to 'papr_hcalls.rst' describing the input, output and return values of the H_HTM hcall as per the internal specification.
v3 patch: https://lore.kernel.org/linuxppc-dev/20240828085223.42177-3-ma...@linux.ibm.com/ Signed-off-by: Abhishek Dubey <adu...@linux.ibm.com> Co-developed-by: Madhavan Srinivasan <ma...@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <ma...@linux.ibm.com> --- Documentation/arch/powerpc/papr_hcalls.rst | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/arch/powerpc/papr_hcalls.rst b/Documentation/arch/powerpc/papr_hcalls.rst index 80d2c0aadab5..805e1cb9bab9 100644 --- a/Documentation/arch/powerpc/papr_hcalls.rst +++ b/Documentation/arch/powerpc/papr_hcalls.rst @@ -289,6 +289,17 @@ to be issued multiple times in order to be completely serviced. The subsequent hcalls to the hypervisor until the hcall is completely serviced at which point H_SUCCESS or other error is returned by the hypervisor. +**H_HTM** + +| Input: flags, target, operation (op), op-param1, op-param2, op-param3 +| Out: *dumphtmbufferdata* +| Return Value: *H_Success,H_Busy,H_LongBusyOrder,H_Partial,H_Parameter, + H_P2,H_P3,H_P4,H_P5,H_P6,H_State,H_Not_Available,H_Authority* + +H_HTM supports setup, configuration, control and dumping of Hardware Trace +Macro (HTM) function and its data. HTM buffer stores tracing data for functions +like core instruction, core LLAT and nest. + References ========== .. [1] "Power Architecture Platform Reference" -- 2.44.0
