diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2020-03-17 09:22:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-18 13:28:22 +0300 |
| commit | 397c7729665a3b07a7b4ce7215173df8e9112809 (patch) | |
| tree | 9082399528a036e08dd7bd5116e5fb4e060ea147 /drivers/hwtracing/intel_th/intel_th.h | |
| parent | 2cca608ad9ebe991d8252c29c28e37783a76bab0 (diff) | |
| download | linux-397c7729665a3b07a7b4ce7215173df8e9112809.tar.xz | |
intel_th: Disallow multi mode on devices where it's broken
Some versions of Intel TH have an issue that prevents the multi mode of
MSU from working correctly, resulting in no trace data and potentially
stuck MSU pipeline.
Disable multi mode on such devices.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200317062215.15598-2-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/intel_th/intel_th.h')
| -rw-r--r-- | drivers/hwtracing/intel_th/intel_th.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index 6f4f5486fe6d..5fe694708b7a 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -47,11 +47,13 @@ struct intel_th_output { /** * struct intel_th_drvdata - describes hardware capabilities and quirks * @tscu_enable: device needs SW to enable time stamping unit + * @multi_is_broken: device has multiblock mode is broken * @has_mintctl: device has interrupt control (MINTCTL) register * @host_mode_only: device can only operate in 'host debugger' mode */ struct intel_th_drvdata { unsigned int tscu_enable : 1, + multi_is_broken : 1, has_mintctl : 1, host_mode_only : 1; }; |