[PATCH v1 0/7] Implement support for external IPT monitoring

[Michał Leszczyński <michal.leszczynski@xxxxxxx>]

Intel Processor Trace is an architectural extension available in modern Intel 
family CPUs. It allows recording the detailed trace of activity while the 
processor executes the code. One might use the recorded trace to reconstruct 
the code flow. It means, to find out the executed code paths, determine 
branches taken, and so forth.

The abovementioned feature is described in Intel(R) 64 and IA-32 Architectures 
Software Developer's Manual Volume 3C: System Programming Guide, Part 3, 
Chapter 36: "Intel Processor Trace."

This patch series implements an interface that Dom0 could use in order to 
enable IPT for particular vCPUs in DomU, allowing for external monitoring. Such 
a feature has numerous applications like malware monitoring, fuzzing, or 
performance testing.

Michal Leszczynski (7):
  x86/vmx: add Intel PT MSR definitions
  x86/vmx: add IPT cpu feature
  x86/vmx: add ipt_state as part of vCPU state
  x86/vmx: add do_vmtrace_op
  tools/libxc: add xc_ptbuf_* functions
  tools/proctrace: add proctrace tool
  x86/vmx: switch IPT MSRs on vmentry/vmexit

 tools/libxc/include/xenctrl.h               |  59 ++++
 tools/libxc/xc_tbuf.c                       | 108 +++++++
 tools/proctrace/COPYING                     | 339 ++++++++++++++++++++
 tools/proctrace/Makefile                    |  49 +++
 tools/proctrace/proctrace.c                 | 139 ++++++++
 xen/arch/x86/hvm/hvm.c                      | 170 ++++++++++
 xen/arch/x86/hvm/vmx/vmx.c                  |  52 +++
 xen/include/asm-x86/cpufeature.h            |   1 +
 xen/include/asm-x86/hvm/hvm.h               |   9 +
 xen/include/asm-x86/hvm/vmx/vmcs.h          |  11 +
 xen/include/asm-x86/msr-index.h             |  37 +++
 xen/include/public/arch-x86/cpufeatureset.h |   1 +
 xen/include/public/hvm/hvm_op.h             |  27 ++
 13 files changed, 1002 insertions(+)
 create mode 100644 tools/proctrace/COPYING
 create mode 100644 tools/proctrace/Makefile
 create mode 100644 tools/proctrace/proctrace.c

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2.20.1