From 8ccb1f8fa6a3dfde32cf33e7ded3558014e6cca2 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Wed, 17 Dec 2025 09:21:05 -0800 Subject: x86,fs/resctrl: Add architectural event pointer The resctrl file system layer passes the domain, RMID, and event id to the architecture to fetch an event counter. Fetching a telemetry event counter requires additional information that is private to the architecture, for example, the offset into MMIO space from where the counter should be read. Add mon_evt::arch_priv that architecture can use for any private data related to the event. The resctrl filesystem initializes mon_evt::arch_priv when the architecture enables the event and passes it back to architecture when needing to fetch an event counter. Suggested-by: Reinette Chatre Signed-off-by: Tony Luck Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Reinette Chatre Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com --- arch/x86/kernel/cpu/resctrl/core.c | 6 +++--- arch/x86/kernel/cpu/resctrl/monitor.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) (limited to 'arch') diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index 595f7eae9294..509277b17b9e 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -918,15 +918,15 @@ 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, false, 0); + resctrl_enable_mon_event(QOS_L3_OCCUP_EVENT_ID, false, 0, NULL); ret = true; } if (rdt_cpu_has(X86_FEATURE_CQM_MBM_TOTAL)) { - resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID, false, 0); + resctrl_enable_mon_event(QOS_L3_MBM_TOTAL_EVENT_ID, false, 0, NULL); ret = true; } if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) { - resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID, false, 0); + resctrl_enable_mon_event(QOS_L3_MBM_LOCAL_EVENT_ID, false, 0, NULL); ret = true; } if (rdt_cpu_has(X86_FEATURE_ABMC)) diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index 20605212656c..6929614ba6e6 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -240,7 +240,7 @@ static u64 get_corrected_val(struct rdt_resource *r, struct rdt_l3_mon_domain *d int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain_hdr *hdr, u32 unused, u32 rmid, enum resctrl_event_id eventid, - u64 *val, void *ignored) + void *arch_priv, u64 *val, void *ignored) { struct rdt_hw_l3_mon_domain *hw_dom; struct rdt_l3_mon_domain *d; -- cgit v1.2.3