[PATCH v1] Misc fixes to xentrace, docs, and add code to support selective human CPU selection.

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

Hey George,

These patches add a bit of code to allow users of xentrace to narrow
down a specific CPU without having to figure out a bit mask. Also they
fix the limitation of the bit mask which is it can only do up to 32-bits
- which on large machines (say 120CPUs), you can't selectively trace anything
past 32CPUs.

The code adds an -C parameter where you can do -C <starting cpu>-<end cpu>
or -C <cpu1>,<cpu2> or a combination of them. This along with 'xl vcpu-list'
makes it extremely easy to trace a specific guest (if pinned).
   
Thank you
 
 tools/libxc/xc_bitops.h   |   2 +
 tools/libxc/xc_tbuf.c     |  44 +++++++++-
 tools/libxc/xenctrl.h     |   1 +
 tools/xentrace/xentrace.8 |  26 +++++-
 tools/xentrace/xentrace.c | 205 ++++++++++++++++++++++++++++++++++++++++++----
 5 files changed, 257 insertions(+), 21 deletions(-)

Konrad Rzeszutek Wilk (5):
      docs: xentrace manpage
      libxc/trace: Add xc_tbuf_set_cpu_mask_array a variant of xc_tbuf_set_cpu_mask (v3)
      libxc/trace: Fix style
      xentrace: Use xc_cpumask_t when setting the cpu mask (v4)
      xentrace: Implement cpu mask range parsing of human values (-C).