resctrlfs.c (a3611fbc6e58c147bdd409b356baf15ddf57271e) resctrlfs.c (ee0415681eb661efa1eb2db7acc263f2c7df1e23)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Basic resctrl file system operations
4 *
5 * Copyright (C) 2018 Intel Corporation
6 *
7 * Authors:
8 * Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,

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601
602 return NULL;
603}
604
605/*
606 * validate_resctrl_feature_request - Check if requested feature is valid.
607 * @resctrl_val: Requested feature
608 *
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Basic resctrl file system operations
4 *
5 * Copyright (C) 2018 Intel Corporation
6 *
7 * Authors:
8 * Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,

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601
602 return NULL;
603}
604
605/*
606 * validate_resctrl_feature_request - Check if requested feature is valid.
607 * @resctrl_val: Requested feature
608 *
609 * Return: 0 on success, non-zero on failure
609 * Return: True if the feature is supported, else false
610 */
610 */
611bool validate_resctrl_feature_request(char *resctrl_val)
611bool validate_resctrl_feature_request(const char *resctrl_val)
612{
612{
613 FILE *inf = fopen("/proc/cpuinfo", "r");
613 struct stat statbuf;
614 bool found = false;
615 char *res;
614 bool found = false;
615 char *res;
616 FILE *inf;
616
617
617 if (!inf)
618 if (!resctrl_val)
618 return false;
619
619 return false;
620
620 res = fgrep(inf, "flags");
621 if (remount_resctrlfs(false))
622 return false;
621
623
622 if (res) {
623 char *s = strchr(res, ':');
624 if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) {
625 if (!stat(L3_PATH, &statbuf))
626 return true;
627 } else if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR))) {
628 if (!stat(MB_PATH, &statbuf))
629 return true;
630 } else if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR)) ||
631 !strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
632 if (!stat(L3_MON_PATH, &statbuf)) {
633 inf = fopen(L3_MON_FEATURES_PATH, "r");
634 if (!inf)
635 return false;
624
636
625 found = s && !strstr(s, resctrl_val);
626 free(res);
637 if (!strncmp(resctrl_val, CMT_STR, sizeof(CMT_STR))) {
638 res = fgrep(inf, "llc_occupancy");
639 if (res) {
640 found = true;
641 free(res);
642 }
643 }
644
645 if (!strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) {
646 res = fgrep(inf, "mbm_total_bytes");
647 if (res) {
648 free(res);
649 res = fgrep(inf, "mbm_local_bytes");
650 if (res) {
651 found = true;
652 free(res);
653 }
654 }
655 }
656 fclose(inf);
657 }
627 }
658 }
628 fclose(inf);
629
630 return found;
631}
632
633int filter_dmesg(void)
634{
635 char line[1024];
636 FILE *fp;

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660 return found;
661}
662
663int filter_dmesg(void)
664{
665 char line[1024];
666 FILE *fp;

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