perf/x86/intel/pt: Add a capability and config bit for disabling TNTs
As of Intel SDM (https://www.intel.com/sdm ) version 076, there is a new Intel PT feature called TNT-Disable which is enabled config bit 55. TNT-Disable disables Taken-Not-Taken packets to reduce the tracing overhead, but with the result that exact control flow information is lost. Add a capability and config bit for TNT-Disable. Signed-off-by:Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by:
Adrian Hunter <adrian.hunter@intel.com> Link: https://lore.kernel.org/r/20220126104815.2807416-3-adrian.hunter@intel.com
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