[CELL] oprofile: add support to OProfile for profiling CELL BE SPUs

From: Maynard Johnson <mpjohn@us.ibm.com>

This patch updates the existing arch/powerpc/oprofile/op_model_cell.c
to add in the SPU profiling capabilities.  In addition, a 'cell' subdirectory
was added to arch/powerpc/oprofile to hold Cell-specific SPU profiling code.
Exports spu_set_profile_private_kref and spu_get_profile_private_kref which
are used by OProfile to store private profile information in spufs data
structures.

Also incorporated several fixes from other patches (rrn).  Check pointer
returned from kzalloc.  Eliminated unnecessary cast.  Better error
handling and cleanup in the related area.  64-bit unsigned long parameter
was being demoted to 32-bit unsigned int and eventually promoted back to
unsigned long.

Signed-off-by: Carl Love <carll@us.ibm.com>
Signed-off-by: Maynard Johnson <mpjohn@us.ibm.com>
Signed-off-by: Bob Nelson <rrnelson@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>

1 files changed, 10 insertions, 4 deletions

diff --git a/arch/powerpc/oprofile/op_model_7450.c b/arch/powerpc/oprofile/op_model_7450.c
index 5d1bbaf..cc599eb 100644
--- a/arch/powerpc/oprofile/op_model_7450.c
+++ b/arch/powerpc/oprofile/op_model_7450.c
@@ -81,7 +81,7 @@ static void pmc_stop_ctrs(void)
 
 /* Configures the counters on this CPU based on the global
  * settings */
-static void fsl7450_cpu_setup(struct op_counter_config *ctr)
+static int fsl7450_cpu_setup(struct op_counter_config *ctr)
 {
 	/* freeze all counters */
 	pmc_stop_ctrs();
@@ -89,12 +89,14 @@ static void fsl7450_cpu_setup(struct op_counter_config *ctr)
 	mtspr(SPRN_MMCR0, mmcr0_val);
 	mtspr(SPRN_MMCR1, mmcr1_val);
 	mtspr(SPRN_MMCR2, mmcr2_val);
+
+	return 0;
 }
 
 #define NUM_CTRS 6
 
 /* Configures the global settings for the countes on all CPUs. */
-static void fsl7450_reg_setup(struct op_counter_config *ctr,
+static int fsl7450_reg_setup(struct op_counter_config *ctr,
 			     struct op_system_config *sys,
 			     int num_ctrs)
 {
@@ -126,10 +128,12 @@ static void fsl7450_reg_setup(struct op_counter_config *ctr,
 		| mmcr1_event6(ctr[5].event);
 
 	mmcr2_val = 0;
+
+	return 0;
 }
 
 /* Sets the counters on this CPU to the chosen values, and starts them */
-static void fsl7450_start(struct op_counter_config *ctr)
+static int fsl7450_start(struct op_counter_config *ctr)
 {
 	int i;
 
@@ -148,6 +152,8 @@ static void fsl7450_start(struct op_counter_config *ctr)
 	pmc_start_ctrs();
 
 	oprofile_running = 1;
+
+	return 0;
 }
 
 /* Stop the counters on this CPU */
@@ -193,7 +199,7 @@ static void fsl7450_handle_interrupt(struct pt_regs *regs,
 	/* The freeze bit was set by the interrupt. */
 	/* Clear the freeze bit, and reenable the interrupt.
 	 * The counters won't actually start until the rfi clears
-	 * the PMM bit */
+	 * the PM/M bit */
 	pmc_start_ctrs();
 }