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authorCarl Love <cel@us.ibm.com>2008-10-29 08:06:45 -0700
committerRobert Richter <robert.richter@amd.com>2008-10-31 16:10:16 +0100
commit99219b4f3e0772a11fc0d98213b00e89fee7b049 (patch)
treec0cdc83bb2e1c54ef161413a750171070527b6cd
parent22cffe494b6b5773b44fe8bb8f41b471c1734b53 (diff)
Cell OProfile: Incorrect local array size in activate spu profiling function
Updated the patch to address comments by Michael Ellerman. Specifically, changed upper limit in for loop to ARRAY_SIZE() macro and added a check to make sure the number of events specified by the user, which is used as the max for indexing various arrays, is no bigger then the declared size of the arrays. The size of the pm_signal_local array should be equal to the number of SPUs being configured in the array. Currently, the array is of size 4 (NR_PHYS_CTRS) but being indexed by a for loop from 0 to 7 (NUM_SPUS_PER_NODE). Signed-off-by: Carl Love <carll@us.ibm.com>
-rw-r--r--arch/powerpc/oprofile/op_model_cell.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/powerpc/oprofile/op_model_cell.c b/arch/powerpc/oprofile/op_model_cell.c
index 35141a8bc3d..25a4ec2514a 100644
--- a/arch/powerpc/oprofile/op_model_cell.c
+++ b/arch/powerpc/oprofile/op_model_cell.c
@@ -582,6 +582,13 @@ static int cell_reg_setup(struct op_counter_config *ctr,
num_counters = num_ctrs;
+ if (unlikely(num_ctrs > NR_PHYS_CTRS)) {
+ printk(KERN_ERR
+ "%s: Oprofile, number of specified events " \
+ "exceeds number of physical counters\n",
+ __func__);
+ return -EIO;
+ }
pm_regs.group_control = 0;
pm_regs.debug_bus_control = 0;
@@ -830,13 +837,13 @@ static int calculate_lfsr(int n)
static int pm_rtas_activate_spu_profiling(u32 node)
{
int ret, i;
- struct pm_signal pm_signal_local[NR_PHYS_CTRS];
+ struct pm_signal pm_signal_local[NUM_SPUS_PER_NODE];
/*
* Set up the rtas call to configure the debug bus to
* route the SPU PCs. Setup the pm_signal for each SPU
*/
- for (i = 0; i < NUM_SPUS_PER_NODE; i++) {
+ for (i = 0; i < ARRAY_SIZE(pm_signal_local); i++) {
pm_signal_local[i].cpu = node;
pm_signal_local[i].signal_group = 41;
/* spu i on word (i/2) */
@@ -848,7 +855,7 @@ static int pm_rtas_activate_spu_profiling(u32 node)
ret = rtas_ibm_cbe_perftools(SUBFUNC_ACTIVATE,
PASSTHRU_ENABLE, pm_signal_local,
- (NUM_SPUS_PER_NODE
+ (ARRAY_SIZE(pm_signal_local)
* sizeof(struct pm_signal)));
if (unlikely(ret)) {