| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/wrap |
| 2 | Date: June 2015 |
| 3 | KernelVersion: 4.3 |
| 4 | Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| 5 | Description: (RW) Configure MSC buffer wrapping. 1 == wrapping enabled. |
| 6 | |
| 7 | What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/mode |
| 8 | Date: June 2015 |
| 9 | KernelVersion: 4.3 |
| 10 | Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| 11 | Description: (RW) Configure MSC operating mode: |
| 12 | - "single", for contiguous buffer mode (high-order alloc); |
| 13 | - "multi", for multiblock mode; |
| 14 | - "ExI", for DCI handler mode; |
| 15 | - "debug", for debug mode. |
| 16 | If operating mode changes, existing buffer is deallocated, |
| 17 | provided there are no active users and tracing is not enabled, |
| 18 | otherwise the write will fail. |
| 19 | |
| 20 | What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/nr_pages |
| 21 | Date: June 2015 |
| 22 | KernelVersion: 4.3 |
| 23 | Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| 24 | Description: (RW) Configure MSC buffer size for "single" or "multi" modes. |
| 25 | In single mode, this is a single number of pages, has to be |
| 26 | power of 2. In multiblock mode, this is a comma-separated list |
| 27 | of numbers of pages for each window to be allocated. Number of |
| 28 | windows is not limited. |
| 29 | Writing to this file deallocates existing buffer (provided |
| 30 | there are no active users and tracing is not enabled) and then |
| 31 | allocates a new one. |
| 32 | |
| 33 | |