Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5f87dfb7 authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Robert Richter
Browse files

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: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
parent 69046d43

arch/x86/oprofile/op_model_amd.c

+5 −2
Original line number Diff line number Diff line
@@ -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);

	}