| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [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 | - any of the currently loaded buffer sinks. |
| 17 | If operating mode changes, existing buffer is deallocated, |
| 18 | provided there are no active users and tracing is not enabled, |
| 19 | otherwise the write will fail. |
| 20 | |
| 21 | What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/nr_pages |
| 22 | Date: June 2015 |
| 23 | KernelVersion: 4.3 |
| 24 | Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| 25 | Description: (RW) Configure MSC buffer size for "single" or "multi" modes. |
| 26 | In single mode, this is a single number of pages, has to be |
| 27 | power of 2. In multiblock mode, this is a comma-separated list |
| 28 | of numbers of pages for each window to be allocated. Number of |
| 29 | windows is not limited. |
| 30 | Writing to this file deallocates existing buffer (provided |
| 31 | there are no active users and tracing is not enabled) and then |
| 32 | allocates a new one. |
| 33 | |
| 34 | What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/win_switch |
| 35 | Date: May 2019 |
| 36 | KernelVersion: 5.2 |
| 37 | Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com> |
| 38 | Description: (RW) Trigger window switch for the MSC's buffer, in |
| 39 | multi-window mode. In "multi" mode, accepts writes of "1", thereby |
| 40 | triggering a window switch for the buffer. Returns an error in any |
| 41 | other operating mode or attempts to write something other than "1". |
| 42 | |