Message ID | 1495379407-6658-11-git-send-email-maddy@linux.vnet.ibm.com |
---|---|
State | Superseded |
Headers | show |
> OPAL_IMC_COUNTERS_INIT > +============================== > +OPAL call interface to initialize In-memory collection > +infrastructure. Call does multiple scom writes on each > +incavation for Core IMC initialization. And for the > +Nest IMC, at this point, call is a no-op and returns > +OPAL_SUCCESS. So why doesn't skiboot do this itself? What happens on kexec where init() has already been called by the first kernel? Wouldn't that be similar to skiboot doing it itself? > + > +Parameters > +---------- > +``uint32_t type`` > + This parameter specifies the imc counter domain. > + The value should be 'OPAL_IMC_COUNTERS_CORE' > + > +``uint64_t addr`` > + This parameter must have a non-zero value. > + This value must be a physical address of the core. > + > +``uint64_t cpu_pir`` > + This parameter specifices target cpu pir > + > +Returns > +------- > +OPAL_PARAMETER - In case of unsupported ``type`` > +OPAL_HARDWARE - If any error in setting up the hardware. > +OPAL_SUCCESS - On succesfully initialized or even if init operation is a > no-op. > + > + > +OPAL_IMC_COUNTERS_START > +============================ > +OPAL call interface for starting the In-Memory Collection > +counters for a specified domain (NEST/CORE). > + > +Parameters > +---------- > +``uint32_t type`` > + This parameter specifies the imc counter domain. > + The value can be either 'OPAL_IMC_COUNTERS_NEST' > + or 'OPAL_IMC_COUNTERS_CORE' How do I know if this is going to work? What happens on the next generation where we have OPAL_IMC_COUNTERS_PONY? How do we know skiboot supports that call? > + > +Returns > +------- > +OPAL_PARAMETER - In case of Unsupported ``type`` > +OPAL_HARDWARE - If any error in setting up the hardware. > +OPAL_SUCCESS - On successful execution of the operation for the given > ``type``. > + > + > +OPAL_IMC_COUNTERS_STOP > +=========================== > +OPAL call interface for stoping In-Memory > +Collection counters for a specified domain (NEST/CORE). > +STOP should always be called after a related START. > +While STOP *may* run successfully without an associated > +START call, this is not gaurenteed. > + > +Parameters > +---------- > +``uint32_t type`` > + This parameter specifies the imc counter domain. > + The value can be either 'OPAL_IMC_COUNTERS_NEST' > + or 'OPAL_IMC_COUNTERS_CORE' > + > +Returns > +------- > +OPAL_PARAMETER - In case of Unsupported ``type`` > +OPAL_HARDWARE - If any error in setting up the hardware. > +OPAL_SUCCESS - On successful execution of the operation for the given > ``type``.
diff --git a/doc/opal-api/opal-imc-counters.rst b/doc/opal-api/opal-imc-counters.rst new file mode 100644 index 000000000000..cda2a3bddf2c --- /dev/null +++ b/doc/opal-api/opal-imc-counters.rst @@ -0,0 +1,67 @@ +OPAL_IMC_COUNTERS_INIT +============================== +OPAL call interface to initialize In-memory collection +infrastructure. Call does multiple scom writes on each +incavation for Core IMC initialization. And for the +Nest IMC, at this point, call is a no-op and returns +OPAL_SUCCESS. + +Parameters +---------- +``uint32_t type`` + This parameter specifies the imc counter domain. + The value should be 'OPAL_IMC_COUNTERS_CORE' + +``uint64_t addr`` + This parameter must have a non-zero value. + This value must be a physical address of the core. + +``uint64_t cpu_pir`` + This parameter specifices target cpu pir + +Returns +------- +OPAL_PARAMETER - In case of unsupported ``type`` +OPAL_HARDWARE - If any error in setting up the hardware. +OPAL_SUCCESS - On succesfully initialized or even if init operation is a no-op. + + +OPAL_IMC_COUNTERS_START +============================ +OPAL call interface for starting the In-Memory Collection +counters for a specified domain (NEST/CORE). + +Parameters +---------- +``uint32_t type`` + This parameter specifies the imc counter domain. + The value can be either 'OPAL_IMC_COUNTERS_NEST' + or 'OPAL_IMC_COUNTERS_CORE' + +Returns +------- +OPAL_PARAMETER - In case of Unsupported ``type`` +OPAL_HARDWARE - If any error in setting up the hardware. +OPAL_SUCCESS - On successful execution of the operation for the given ``type``. + + +OPAL_IMC_COUNTERS_STOP +=========================== +OPAL call interface for stoping In-Memory +Collection counters for a specified domain (NEST/CORE). +STOP should always be called after a related START. +While STOP *may* run successfully without an associated +START call, this is not gaurenteed. + +Parameters +---------- +``uint32_t type`` + This parameter specifies the imc counter domain. + The value can be either 'OPAL_IMC_COUNTERS_NEST' + or 'OPAL_IMC_COUNTERS_CORE' + +Returns +------- +OPAL_PARAMETER - In case of Unsupported ``type`` +OPAL_HARDWARE - If any error in setting up the hardware. +OPAL_SUCCESS - On successful execution of the operation for the given ``type``.