diff options
| author | Tejun Heo <tj@kernel.org> | 2015-11-03 17:29:03 -0500 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-11-03 17:29:03 -0500 |
| commit | 159b5bb46492e4dcef2070b12861030bc360402b (patch) | |
| tree | 93de7d6e94a059aade50ee5437de6a50ccd1cf7b /arch/arm64/include/asm/hw_breakpoint.h | |
| parent | 56e74338a535cbcc2f2da08b1ea1a92920194364 (diff) | |
| parent | 469eabb3aec03d9defed3462df743a223a5c8f54 (diff) | |
Merge branch 'for-4.3-fixes' into for-4.4
Diffstat (limited to 'arch/arm64/include/asm/hw_breakpoint.h')
| -rw-r--r-- | arch/arm64/include/asm/hw_breakpoint.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/hw_breakpoint.h b/arch/arm64/include/asm/hw_breakpoint.h index 52b484b6aa1a..4c47cb2fbb52 100644 --- a/arch/arm64/include/asm/hw_breakpoint.h +++ b/arch/arm64/include/asm/hw_breakpoint.h @@ -16,6 +16,8 @@ #ifndef __ASM_HW_BREAKPOINT_H #define __ASM_HW_BREAKPOINT_H +#include <asm/cputype.h> + #ifdef __KERNEL__ struct arch_hw_breakpoint_ctrl { @@ -132,5 +134,17 @@ static inline void ptrace_hw_copy_thread(struct task_struct *task) extern struct pmu perf_ops_bp; +/* Determine number of BRP registers available. */ +static inline int get_num_brps(void) +{ + return ((read_cpuid(ID_AA64DFR0_EL1) >> 12) & 0xf) + 1; +} + +/* Determine number of WRP registers available. */ +static inline int get_num_wrps(void) +{ + return ((read_cpuid(ID_AA64DFR0_EL1) >> 20) & 0xf) + 1; +} + #endif /* __KERNEL__ */ #endif /* __ASM_BREAKPOINT_H */ |