[GIT PULL] breakpoint: Rework arch validation v4

From: Frederic Weisbecker
Date: Mon Jun 25 2018 - 22:59:33 EST


Ingo,

Please pull the perf/breakpoint-v4 branch that can be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
perf/breakpoint-v4

HEAD: ba25ee9c7b3ef1543c2a24a7ca6a621433803ee4

Only change since v3 is a rebase against latest tip:perf/core

---
When we modify a hardware breakpoint, the architecture code fills up
the architecture data as the validation of generic attributes progresses.
If something goes wrong in the middle, the architecture data changes
aren't rolled back and we are left with a halfway fiddled breakpoint.

This set fixes the various misdesigns that back this bad behaviour.

Thanks,
Frederic
---

Frederic Weisbecker (12):
perf/breakpoint: Split attribute parse and commit
perf/breakpoint: Pass arch breakpoint struct to arch_check_bp_in_kernelspace()
x86: Implement hw_breakpoint_arch_parse()
powerpc: Implement hw_breakpoint_arch_parse()
arm: Implement hw_breakpoint_arch_parse()
arm64: Implement hw_breakpoint_arch_parse()
sh: Remove "struct arch_hw_breakpoint::name" unused field
sh: Implement hw_breakpoint_arch_parse()
xtensa: Implement hw_breakpoint_arch_parse()
perf/breakpoint: Remove default hw_breakpoint_arch_parse()
perf/breakpoint: Pass new breakpoint type to modify_breakpoint_slot()
perf/breakpoint: Clean up and consolidate modify_user_hw_breakpoint_check()


arch/arm/include/asm/hw_breakpoint.h | 7 +-
arch/arm/kernel/hw_breakpoint.c | 78 +++++++++---------
arch/arm64/include/asm/hw_breakpoint.h | 7 +-
arch/arm64/kernel/hw_breakpoint.c | 86 ++++++++++----------
arch/powerpc/include/asm/hw_breakpoint.h | 7 +-
arch/powerpc/kernel/hw_breakpoint.c | 47 ++++++-----
arch/sh/include/asm/hw_breakpoint.h | 8 +-
arch/sh/kernel/hw_breakpoint.c | 53 ++++++-------
arch/x86/include/asm/hw_breakpoint.h | 7 +-
arch/x86/kernel/hw_breakpoint.c | 131 ++++++++++++++++---------------
arch/xtensa/include/asm/hw_breakpoint.h | 7 +-
arch/xtensa/kernel/hw_breakpoint.c | 40 ++++------
kernel/events/hw_breakpoint.c | 92 +++++++++++++---------
13 files changed, 294 insertions(+), 276 deletions(-)