diff options
| author | Markus Metzger <markus.t.metzger@intel.com> | 2008-04-08 05:01:58 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-05-12 15:27:53 -0400 |
| commit | 93fa7636dfdc059b25df148f230c0991096afdef (patch) | |
| tree | cf277bd09091ac69abb5f7fdc21c705b8f186f88 /arch/x86/kernel/setup_64.c | |
| parent | 492c2e476eac010962850006c49df326919b284c (diff) | |
x86, ptrace: PEBS support
Polish the ds.h interface and add support for PEBS.
Ds.c is meant to be the resource allocator for per-thread and per-cpu
BTS and PEBS recording.
It is used by ptrace/utrace to provide execution tracing of debugged tasks.
It will be used by profilers (e.g. perfmon2).
It may be used by kernel debuggers to provide a kernel execution trace.
Changes in detail:
- guard DS and ptrace by CONFIG macros
- separate DS and BTS more clearly
- simplify field accesses
- add functions to manage PEBS buffers
- add simple protection/allocation mechanism
- added support for Atom
Opens:
- buffer overflow handling
Currently, only circular buffers are supported. This is all we need
for debugging. Profilers would want an overflow notification.
This is planned to be added when perfmon2 is made to use the ds.h
interface.
- utrace intermediate layer
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/setup_64.c')
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index f2fc8feb727d..f7aebe13c999 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c | |||
| @@ -920,11 +920,12 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c) | |||
| 920 | set_cpu_cap(c, X86_FEATURE_BTS); | 920 | set_cpu_cap(c, X86_FEATURE_BTS); |
| 921 | if (!(l1 & (1<<12))) | 921 | if (!(l1 & (1<<12))) |
| 922 | set_cpu_cap(c, X86_FEATURE_PEBS); | 922 | set_cpu_cap(c, X86_FEATURE_PEBS); |
| 923 | ds_init_intel(c); | ||
| 923 | } | 924 | } |
| 924 | 925 | ||
| 925 | 926 | ||
| 926 | if (cpu_has_bts) | 927 | if (cpu_has_bts) |
| 927 | ds_init_intel(c); | 928 | ptrace_bts_init_intel(c); |
| 928 | 929 | ||
| 929 | n = c->extended_cpuid_level; | 930 | n = c->extended_cpuid_level; |
| 930 | if (n >= 0x80000008) { | 931 | if (n >= 0x80000008) { |