diff options
| author | Tony Luck <tony.luck@intel.com> | 2025-09-05 16:34:00 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-09-15 11:46:08 +0200 |
| commit | 09f37134464cc03baf5cb8eab2d99db27ee73217 (patch) | |
| tree | 7bfccbfafc0c166d89c262dd0823ed28ed2258f1 /arch/x86/kernel/cpu/resctrl | |
| parent | 0e58f6a7dd689c73d67e6a2164b46d4618f2698a (diff) | |
| download | lwn-09f37134464cc03baf5cb8eab2d99db27ee73217.tar.gz lwn-09f37134464cc03baf5cb8eab2d99db27ee73217.zip | |
x86,fs/resctrl: Consolidate monitor event descriptions
There are currently only three monitor events, all associated with the
RDT_RESOURCE_L3 resource. Growing support for additional events will be easier
with some restructuring to have a single point in file system code where all
attributes of all events are defined.
Place all event descriptions into an array mon_event_all[]. Doing this has the
beneficial side effect of removing the need for rdt_resource::evt_list.
Add resctrl_event_id::QOS_FIRST_EVENT for a lower bound on range checks for
event ids and as the starting index to scan mon_event_all[].
Drop the code that builds evt_list and change the two places where the list is
scanned to scan mon_event_all[] instead using a new helper macro
for_each_mon_event().
Architecture code now informs file system code which events are available with
resctrl_enable_mon_event().
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/cover.1757108044.git.babu.moger@amd.com
Diffstat (limited to 'arch/x86/kernel/cpu/resctrl')
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/core.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index 187d527ef73b..7fcae25874fe 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -864,12 +864,18 @@ static __init bool get_rdt_mon_resources(void) { struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; - if (rdt_cpu_has(X86_FEATURE_CQM_OCCUP_LLC)) + if (rdt_cpu_has(X86_FEATURE_CQM_OCCUP_LLC)) { + resctrl_enable_mon_event(QOS_L3_OCCUP_EVENT_ID); rdt_mon_features |= (1 << QOS_L3_OCCUP_EVENT_ID); - if (rdt_cpu_has(X86_FEATURE_CQM_MBM_TOTAL)) + } + if (rdt_cpu_has(X86_FEATURE_CQM_MBM_TOTAL)) { + resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID); rdt_mon_features |= (1 << QOS_L3_MBM_TOTAL_EVENT_ID); - if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) + } + if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) { + resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID); rdt_mon_features |= (1 << QOS_L3_MBM_LOCAL_EVENT_ID); + } if (!rdt_mon_features) return false; |