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30-Jan-2017 |
Doug Evans <dje@google.com> |
[kernel][x86] First pass as Intel PT support
Intel PT (Processor Trace) is a h/w based instruction tracing
feature. See Intel Vol. 3 chapter 36.
This is the low level kernel support:
- support for reading/writing the PT MSRs
- support for starting/stopping full system traces
(tracing all cpus, regardless of thread running)
- logging of cr3->pid values for later post-processing of the trace
Support for tracing specific threads to follow.
The rest is in user-space driver "intel-pt".
Change-Id: Ib69a17e501a08dd6b0a661524cac9467d2d7f62e
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