x86/oprofile: add the logic for enabling additional IBS bits

This patch adds the logic for enabling additional IBS control bits :
* IBS-Fetch IbsRandEn bit (bit 57)
* IBS-Op IbsOpCntCtl bit (bit 19)

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>

diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c
index a2e83af..5095137 100644 (file)
--- a/arch/x86/oprofile/op_model_amd.c
+++ b/arch/x86/oprofile/op_model_amd.c
@@ -310,12 +310,15 @@ static void op_amd_start(struct op_msrs const * const msrs)
 #ifdef CONFIG_OPROFILE_IBS
        if (ibs_allowed && ibs_config.fetch_enabled) {
                low = (ibs_config.max_cnt_fetch >> 4) & 0xFFFF;
-               high = IBS_FETCH_HIGH_ENABLE;
+               high = ((ibs_config.rand_en & 0x1) << 25) /* bit 57 */
+                       + IBS_FETCH_HIGH_ENABLE;
                wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
        }
 
        if (ibs_allowed && ibs_config.op_enabled) {
-               low = ((ibs_config.max_cnt_op >> 4) & 0xFFFF) + IBS_OP_LOW_ENABLE;
+               low = ((ibs_config.max_cnt_op >> 4) & 0xFFFF)
+                       + ((ibs_config.dispatched_ops & 0x1) << 19) /* bit 19 */
+                       + IBS_OP_LOW_ENABLE;
                high = 0;
                wrmsr(MSR_AMD64_IBSOPCTL, low, high);
        }