diff options
| author | Tony Luck <tony.luck@intel.com> | 2025-12-17 09:20:58 -0800 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-01-05 15:38:07 +0100 |
| commit | ab0308aee3819a3eccde42f9eb5bb01d6733be38 (patch) | |
| tree | b21ee291be107584f6dc685c9c3ed5ba4f0f2912 /arch/x86 | |
| parent | dd110880e80d35ad07e460e7a8da007c8058e7bf (diff) | |
x86,fs/resctrl: Handle events that can be read from any CPU
resctrl assumes that monitor events can only be read from a CPU in the
cpumask_t set of each domain. This is true for x86 events accessed with an
MSR interface, but may not be true for other access methods such as MMIO.
Introduce and use flag mon_evt::any_cpu, settable by architecture, that
indicates there are no restrictions on which CPU can read that event. This
flag is not supported by the L3 event reading that requires to be run on a CPU
that belongs to the L3 domain of the event being read.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index b3a2dc56155d..bd4a98106153 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -902,15 +902,15 @@ static __init bool get_rdt_mon_resources(void) bool ret = false; if (rdt_cpu_has(X86_FEATURE_CQM_OCCUP_LLC)) { - resctrl_enable_mon_event(QOS_L3_OCCUP_EVENT_ID); + resctrl_enable_mon_event(QOS_L3_OCCUP_EVENT_ID, false); ret = true; } if (rdt_cpu_has(X86_FEATURE_CQM_MBM_TOTAL)) { - resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID); + resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID, false); ret = true; } if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) { - resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID); + resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID, false); ret = true; } if (rdt_cpu_has(X86_FEATURE_ABMC)) |