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x86/oprofile: Fix cast of counter value 

When casting the counter value to a 64 bit value in 32 bit mode, sign
extension may lead to broken counter values. This patch fixes this by
casting to (u64) instead of (s64).

Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2009-07-07 19:30:25 +02:00
parent debc6a6927
commit 8045a4c293
2 changed files with 5 additions and 5 deletions
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4
arch/x86/oprofile/op_model_amd.c
View File

@ -111,7 +111,7 @@ static void op_amd_setup_ctrs(struct op_x86_model_spec const *model,
if (counter_config[i].enabled && msrs->counters[i].addr) {
reset_value[i] = counter_config[i].count;
wrmsrl(msrs->counters[i].addr,
-(s64)counter_config[i].count);
-(u64)counter_config[i].count);
rdmsrl(msrs->controls[i].addr, val);
val &= model->reserved;
val |= op_x86_get_ctrl(model, &counter_config[i]);
@ -237,7 +237,7 @@ static int op_amd_check_ctrs(struct pt_regs * const regs,
if (val & OP_CTR_OVERFLOW)
continue;
oprofile_add_sample(regs, i);
wrmsrl(msrs->counters[i].addr, -(s64)reset_value[i]);
wrmsrl(msrs->counters[i].addr, -(u64)reset_value[i]);
}
op_amd_handle_ibs(regs, msrs);

6
arch/x86/oprofile/op_model_p4.c
View File

@ -580,7 +580,7 @@ static void p4_setup_ctrs(struct op_x86_model_spec const *model,
reset_value[i] = counter_config[i].count;
pmc_setup_one_p4_counter(i);
wrmsrl(p4_counters[VIRT_CTR(stag, i)].counter_address,
-(s64)counter_config[i].count);
-(u64)counter_config[i].count);
} else {
reset_value[i] = 0;
}
@ -625,11 +625,11 @@ static int p4_check_ctrs(struct pt_regs * const regs,
if (CCCR_OVF_P(low) || !(ctr & OP_CTR_OVERFLOW)) {
oprofile_add_sample(regs, i);
wrmsrl(p4_counters[real].counter_address,
-(s64)reset_value[i]);
-(u64)reset_value[i]);
CCCR_CLEAR_OVF(low);
wrmsr(p4_counters[real].cccr_address, low, high);
wrmsrl(p4_counters[real].counter_address,
-(s64)reset_value[i]);
-(u64)reset_value[i]);
}
}