Hi all,
Thank you very much for your feedbacks in the v1 patch.
This series is based on 6.10-rc4, cross compile tested only.
As far as I can tell, these changes are not relevant with tools/perf,
on some archs such as ARM, ARM64 and LoongArch which have privilege
level of breakpoint, the initial aim is to make use of the value of
ctrl->privilege saved in decode_ctrl_reg() and then remove the check
whether bp virtual address is in kernel space to assign value for
hw->ctrl.privilege in arch_build_bp_info().
v2:
-- Put the new member "bp_priv" at the end of the uapi
struct perf_event_attr and add PERF_ATTR_SIZE_VER9.
-- Update the commit message to make the goal clear.
Tiezhu Yang (3):
perf: Add perf_event_attr::bp_priv
arm: hw_breakpoint: Save privilege of access control via ptrace
arm64: hw_breakpoint: Save privilege of access control via ptrace
arch/arm/kernel/hw_breakpoint.c | 4 +---
arch/arm/kernel/ptrace.c | 2 ++
arch/arm64/kernel/hw_breakpoint.c | 11 ++---------
arch/arm64/kernel/ptrace.c | 2 ++
include/uapi/linux/perf_event.h | 3 +++
kernel/events/hw_breakpoint.c | 1 +
6 files changed, 11 insertions(+), 12 deletions(-)