On 10/7/2023 11:56 AM, Dan Raymond wrote: > Add support for port I/O tracing on x86. Memory mapped I/O tracing is > available on x86 via CONFIG_MMIOTRACE but that relies on page faults > so it doesn't work with port I/O. This feature uses tracepoints in a > similar manner as CONFIG_TRACE_MMIO_ACCESS. > > Signed-off-by: Dan Raymond <raymod2@xxxxxxxxx> > Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > --- > V1 -> V2: > - create header file for prototypes to silence new compiler warning > - reduce CPU overhead to 2 instructions (no branching) when tracing disabled > - fix imprecise IP logging by retrieving the IP off the stack instead of using > compile time labels > > V2 -> V3: > - restore missing semicolon > > V3 -> V4: > - make GPL licenses consistent > - change pointer arguments from (long) to (void *) > - eliminate include guard checks and use -DDISABLE_TRACEPOINTS instead to > disable tracepoints in arch/x86/boot/* > - fix compiler warnings due to signed/unsigned mismatch in arch_cmpxchg64() > > V4 -> V5: > - add -DDISABLE_TRACEPOINTS to arch/x86/realmode/rm/Makefile Can I get reviews on this please?
