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oprofile/x86: make AMD IBS hotplug capable

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Current IBS code is not hotplug capable. An offline cpu might not be
initialized or deinitialized properly. This patch fixes this by
removing on_each_cpu() functions. The IBS init/deinit code is executed
in the per-cpu functions model->setup_ctrs() and model->cpu_down()
which are also called by hotplug notifiers. model->cpu_down() replaces
model->exit() that became obsolete.

Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter
2010-05-05 17:47:17 +02:00
parent 3de668ee8d
commit bae663bc63
3 changed files with 19 additions and 41 deletions
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arch/x86/oprofile/op_x86_model.h
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@@ -40,10 +40,10 @@ struct op_x86_model_spec {
u64 reserved;
u16 event_mask;
int (*init)(struct oprofile_operations *ops);
void (*exit)(void);
int (*fill_in_addresses)(struct op_msrs * const msrs);
void (*setup_ctrs)(struct op_x86_model_spec const *model,
struct op_msrs const * const msrs);
void (*cpu_down)(void);
int (*check_ctrs)(struct pt_regs * const regs,
struct op_msrs const * const msrs);
void (*start)(struct op_msrs const * const msrs);