[RFC PATCH 0/2] hw-breakpoints allocation constraints updates

[Frederic Weisbecker <fweisbec@gmail.com>]

Hi,

These patches tend to extend the breakpoint allocation constraints to
be more non-x86 friendly.

It can separate the data and instruction breakpoint space and
handle address ranges or other kind of tricky things that makes
a breakpoint use more than one address register.

There is still one kind of constraint it can't handle, something
I've found on ARMv7 implementation: linking an breakpoint to a
watchpoint. But if this needs arises, I will be glad to add that
support.

Beware, it's only compile-tested for now.

Tell me what you think.

Thanks.


Frederic Weisbecker (2):
  hw-breakpoints: Separate constraint space for data and instruction
    breakpoints
  hw-breakpoints: Handle breakpoint weight in allocation constraints

 arch/Kconfig                  |   11 ++++
 arch/x86/Kconfig              |    1 +
 include/linux/hw_breakpoint.h |    9 ++-
 kernel/hw_breakpoint.c        |  129 ++++++++++++++++++++++++++++++-----------
 4 files changed, 112 insertions(+), 38 deletions(-)