[PATCH 3/3] powerpc: Document details on H_HTM hcall

[Ritesh Harjani (IBM)]

Madhavan Srinivasan <maddy at linux.ibm.com> writes:

> Add documentation to 'papr_hcalls.rst' describing the
> input, output and return values of the H_HTM hcall as
> per the internal specification.
>
> Signed-off-by: Madhavan Srinivasan <maddy at 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.
> +

Minor nit: Maybe the set of debugfs cmds to collect the trace and some
example trace log? If it is not confidential?

>  References
>  ==========
>  .. [1] "Power Architecture Platform Reference"
> -- 
> 2.45.2