From nobody Sun Feb 8 07:58:14 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 569B62ECE93; Sat, 10 Jan 2026 19:46:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768074391; cv=none; b=fd5K6qDDEaW4tA35JIZQDt+mGr8YJp6Yrl/5YwQRBBm38ExmVusL3Hq95J6l9vqdPQJuUJgNTn2J+grQJBzc9P5wcAnG205JbADYWr4p7mPgylrUN2FK8v9YdETVkV43okg8lYWNOg5B7PTaJ3CiUITzlazoHQ9Y2OoaUTOAyJg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768074391; c=relaxed/simple; bh=Z0P2JebpAXxTCPJY/2YZVvoghVusG+MGA4/SS7Q0Um8=; h=Date:From:To:Subject:Cc:MIME-Version:Message-ID:Content-Type; b=E+Oc103w2sT2fDHLyJehBqStposvnnA/XFMOHSWz0z3oMRs5lFvasZYBwaKtwoP8OlWP5WxZx5eKTtY/2RRE6ZBIL498tCzFsFFXq+9ZFTXHQFp9Ho19lI0Z+C+Zu9/J3oAiSFR+kIcy3vQzGHIM/syUhpyIGYqHV82BYmb8cUo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=oc7LmdNQ; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=t8Y/HEid; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="oc7LmdNQ"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="t8Y/HEid" Date: Sat, 10 Jan 2026 19:46:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1768074372; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=TFyKy/bt78Ci/vMoknqG0RqtmuJzugUsiIkyT1p006A=; b=oc7LmdNQOWduKZkkTNRn/MpZhE7Kyoylhyeq+NDjVPKvpx5dpVAUvRDV3jYhrPH/BP+KS0 cCl5ASl2+w9OTqWQbDRacPaioAz+FUNkAJ0Mf0Nx/Gt7R+JqZ5Hvi5QeUJqOqVBVzJn3pf 6BUErFL7J7dhJUM8ON+QbxS52jC7h76JpvU2S/jobP+VqoDk73OBDjW8OAo5aayTxefMvu HCOUunysGArQ2vTmQic5bOFVMMbZwOxT5t0mw1UYpoYqrEciEm/1XgK+wmWcZV0cI6v03Z 0Qw7ms5j65neaF3iHrrK1UnL6Jp5sbzpZWSwzQ7CJSbqjhOzNV7w8fbZMiGg1Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1768074372; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=TFyKy/bt78Ci/vMoknqG0RqtmuJzugUsiIkyT1p006A=; b=t8Y/HEidy4it0ke+BjhMZq/99Pg6TqqBRVBf6oAWDqxxwW3OvNRYbghDr4FiObd+Hjv1SU I4zywsJlUhHkrEAw== From: "tip-bot2 for Tony Luck" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: x86/cache] fs/resctrl: Make event details accessible to functions when reading events Cc: Tony Luck , "Borislav Petkov (AMD)" , Reinette Chatre , x86@kernel.org, linux-kernel@vger.kernel.org Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <176807437166.510.14838268424719299796.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the x86/cache branch of tip: Commit-ID: dd110880e80d35ad07e460e7a8da007c8058e7bf Gitweb: https://git.kernel.org/tip/dd110880e80d35ad07e460e7a8da007c8= 058e7bf Author: Tony Luck AuthorDate: Wed, 17 Dec 2025 09:20:57 -08:00 Committer: Borislav Petkov (AMD) CommitterDate: Mon, 05 Jan 2026 15:25:22 +01:00 fs/resctrl: Make event details accessible to functions when reading events Reading monitoring event data from MMIO requires more context than the even= t id to be able to read the correct memory location. struct mon_evt is the appro= priate place for this event specific context. Prepare for addition of extra fields to struct mon_evt by changing the call= ing conventions to pass a pointer to the mon_evt structure instead of just the event id. 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 --- fs/resctrl/ctrlmondata.c | 18 +++++++++--------- fs/resctrl/internal.h | 10 +++++----- fs/resctrl/monitor.c | 22 +++++++++++----------- fs/resctrl/rdtgroup.c | 6 +++--- 4 files changed, 28 insertions(+), 28 deletions(-) diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c index a3c734f..7f9b2fe 100644 --- a/fs/resctrl/ctrlmondata.c +++ b/fs/resctrl/ctrlmondata.c @@ -552,7 +552,7 @@ struct rdt_domain_hdr *resctrl_find_domain(struct list_= head *h, int id, =20 void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, struct rdt_domain_hdr *hdr, struct rdtgroup *rdtgrp, - cpumask_t *cpumask, int evtid, int first) + cpumask_t *cpumask, struct mon_evt *evt, int first) { int cpu; =20 @@ -563,15 +563,15 @@ void mon_event_read(struct rmid_read *rr, struct rdt_= resource *r, * Setup the parameters to pass to mon_event_count() to read the data. */ rr->rgrp =3D rdtgrp; - rr->evtid =3D evtid; + rr->evt =3D evt; rr->r =3D r; rr->hdr =3D hdr; rr->first =3D first; if (resctrl_arch_mbm_cntr_assign_enabled(r) && - resctrl_is_mbm_event(evtid)) { + resctrl_is_mbm_event(evt->evtid)) { rr->is_mbm_cntr =3D true; } else { - rr->arch_mon_ctx =3D resctrl_arch_mon_ctx_alloc(r, evtid); + rr->arch_mon_ctx =3D resctrl_arch_mon_ctx_alloc(r, evt->evtid); if (IS_ERR(rr->arch_mon_ctx)) { rr->err =3D -EINVAL; return; @@ -592,14 +592,13 @@ void mon_event_read(struct rmid_read *rr, struct rdt_= resource *r, smp_call_on_cpu(cpu, smp_mon_event_count, rr, false); =20 if (rr->arch_mon_ctx) - resctrl_arch_mon_ctx_free(r, evtid, rr->arch_mon_ctx); + resctrl_arch_mon_ctx_free(r, evt->evtid, rr->arch_mon_ctx); } =20 int rdtgroup_mondata_show(struct seq_file *m, void *arg) { struct kernfs_open_file *of =3D m->private; enum resctrl_res_level resid; - enum resctrl_event_id evtid; struct rdt_l3_mon_domain *d; struct rdt_domain_hdr *hdr; struct rmid_read rr =3D {0}; @@ -607,6 +606,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg) int domid, cpu, ret =3D 0; struct rdt_resource *r; struct cacheinfo *ci; + struct mon_evt *evt; struct mon_data *md; =20 rdtgrp =3D rdtgroup_kn_lock_live(of->kn); @@ -623,7 +623,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg) =20 resid =3D md->rid; domid =3D md->domid; - evtid =3D md->evtid; + evt =3D md->evt; r =3D resctrl_arch_get_resource(resid); =20 if (md->sum) { @@ -641,7 +641,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg) continue; rr.ci =3D ci; mon_event_read(&rr, r, NULL, rdtgrp, - &ci->shared_cpu_map, evtid, false); + &ci->shared_cpu_map, evt, false); goto checkresult; } } @@ -657,7 +657,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg) ret =3D -ENOENT; goto out; } - mon_event_read(&rr, r, hdr, rdtgrp, &hdr->cpu_mask, evtid, false); + mon_event_read(&rr, r, hdr, rdtgrp, &hdr->cpu_mask, evt, false); } =20 checkresult: diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h index 9768341..86cf38a 100644 --- a/fs/resctrl/internal.h +++ b/fs/resctrl/internal.h @@ -81,7 +81,7 @@ extern struct mon_evt mon_event_all[QOS_NUM_EVENTS]; * struct mon_data - Monitoring details for each event file. * @list: Member of the global @mon_data_kn_priv_list list. * @rid: Resource id associated with the event file. - * @evtid: Event id associated with the event file. + * @evt: Event structure associated with the event file. * @sum: Set when event must be summed across multiple * domains. * @domid: When @sum is zero this is the domain to which @@ -95,7 +95,7 @@ extern struct mon_evt mon_event_all[QOS_NUM_EVENTS]; struct mon_data { struct list_head list; enum resctrl_res_level rid; - enum resctrl_event_id evtid; + struct mon_evt *evt; int domid; bool sum; }; @@ -108,7 +108,7 @@ struct mon_data { * @r: Resource describing the properties of the event being read. * @hdr: Header of domain that the counter should be read from. If NULL = then * sum all domains in @r sharing L3 @ci.id - * @evtid: Which monitor event to read. + * @evt: Which monitor event to read. * @first: Initialize MBM counter when true. * @ci: Cacheinfo for L3. Only set when @hdr is NULL. Used when summing * domains. @@ -126,7 +126,7 @@ struct rmid_read { struct rdtgroup *rgrp; struct rdt_resource *r; struct rdt_domain_hdr *hdr; - enum resctrl_event_id evtid; + struct mon_evt *evt; bool first; struct cacheinfo *ci; bool is_mbm_cntr; @@ -367,7 +367,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg= ); =20 void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, struct rdt_domain_hdr *hdr, struct rdtgroup *rdtgrp, - cpumask_t *cpumask, int evtid, int first); + cpumask_t *cpumask, struct mon_evt *evt, int first); =20 void mbm_setup_overflow_handler(struct rdt_l3_mon_domain *dom, unsigned long delay_ms, diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c index d5ae0ef..340b847 100644 --- a/fs/resctrl/monitor.c +++ b/fs/resctrl/monitor.c @@ -430,7 +430,7 @@ static int __l3_mon_event_count(struct rdtgroup *rdtgrp= , struct rmid_read *rr) d =3D container_of(rr->hdr, struct rdt_l3_mon_domain, hdr); =20 if (rr->is_mbm_cntr) { - cntr_id =3D mbm_cntr_get(rr->r, d, rdtgrp, rr->evtid); + cntr_id =3D mbm_cntr_get(rr->r, d, rdtgrp, rr->evt->evtid); if (cntr_id < 0) { rr->err =3D -ENOENT; return -EINVAL; @@ -439,10 +439,10 @@ static int __l3_mon_event_count(struct rdtgroup *rdtg= rp, struct rmid_read *rr) =20 if (rr->first) { if (rr->is_mbm_cntr) - resctrl_arch_reset_cntr(rr->r, d, closid, rmid, cntr_id, rr->evtid); + resctrl_arch_reset_cntr(rr->r, d, closid, rmid, cntr_id, rr->evt->evtid= ); else - resctrl_arch_reset_rmid(rr->r, d, closid, rmid, rr->evtid); - m =3D get_mbm_state(d, closid, rmid, rr->evtid); + resctrl_arch_reset_rmid(rr->r, d, closid, rmid, rr->evt->evtid); + m =3D get_mbm_state(d, closid, rmid, rr->evt->evtid); if (m) memset(m, 0, sizeof(struct mbm_state)); return 0; @@ -453,10 +453,10 @@ static int __l3_mon_event_count(struct rdtgroup *rdtg= rp, struct rmid_read *rr) return -EINVAL; if (rr->is_mbm_cntr) rr->err =3D resctrl_arch_cntr_read(rr->r, d, closid, rmid, cntr_id, - rr->evtid, &tval); + rr->evt->evtid, &tval); else rr->err =3D resctrl_arch_rmid_read(rr->r, rr->hdr, closid, rmid, - rr->evtid, &tval, rr->arch_mon_ctx); + rr->evt->evtid, &tval, rr->arch_mon_ctx); if (rr->err) return rr->err; =20 @@ -501,7 +501,7 @@ static int __l3_mon_event_count_sum(struct rdtgroup *rd= tgrp, struct rmid_read *r if (d->ci_id !=3D rr->ci->id) continue; err =3D resctrl_arch_rmid_read(rr->r, &d->hdr, closid, rmid, - rr->evtid, &tval, rr->arch_mon_ctx); + rr->evt->evtid, &tval, rr->arch_mon_ctx); if (!err) { rr->val +=3D tval; ret =3D 0; @@ -551,7 +551,7 @@ static void mbm_bw_count(struct rdtgroup *rdtgrp, struc= t rmid_read *rr) if (!domain_header_is_valid(rr->hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) return; d =3D container_of(rr->hdr, struct rdt_l3_mon_domain, hdr); - m =3D get_mbm_state(d, closid, rmid, rr->evtid); + m =3D get_mbm_state(d, closid, rmid, rr->evt->evtid); if (WARN_ON_ONCE(!m)) return; =20 @@ -725,11 +725,11 @@ static void mbm_update_one_event(struct rdt_resource = *r, struct rdt_l3_mon_domai =20 rr.r =3D r; rr.hdr =3D &d->hdr; - rr.evtid =3D evtid; + rr.evt =3D &mon_event_all[evtid]; if (resctrl_arch_mbm_cntr_assign_enabled(r)) { rr.is_mbm_cntr =3D true; } else { - rr.arch_mon_ctx =3D resctrl_arch_mon_ctx_alloc(rr.r, rr.evtid); + rr.arch_mon_ctx =3D resctrl_arch_mon_ctx_alloc(rr.r, evtid); if (IS_ERR(rr.arch_mon_ctx)) { pr_warn_ratelimited("Failed to allocate monitor context: %ld", PTR_ERR(rr.arch_mon_ctx)); @@ -747,7 +747,7 @@ static void mbm_update_one_event(struct rdt_resource *r= , struct rdt_l3_mon_domai mbm_bw_count(rdtgrp, &rr); =20 if (rr.arch_mon_ctx) - resctrl_arch_mon_ctx_free(rr.r, rr.evtid, rr.arch_mon_ctx); + resctrl_arch_mon_ctx_free(rr.r, evtid, rr.arch_mon_ctx); } =20 static void mbm_update(struct rdt_resource *r, struct rdt_l3_mon_domain *d, diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index b57e1e7..771e40f 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -3103,7 +3103,7 @@ static struct mon_data *mon_get_kn_priv(enum resctrl_= res_level rid, int domid, =20 list_for_each_entry(priv, &mon_data_kn_priv_list, list) { if (priv->rid =3D=3D rid && priv->domid =3D=3D domid && - priv->sum =3D=3D do_sum && priv->evtid =3D=3D mevt->evtid) + priv->sum =3D=3D do_sum && priv->evt =3D=3D mevt) return priv; } =20 @@ -3114,7 +3114,7 @@ static struct mon_data *mon_get_kn_priv(enum resctrl_= res_level rid, int domid, priv->rid =3D rid; priv->domid =3D domid; priv->sum =3D do_sum; - priv->evtid =3D mevt->evtid; + priv->evt =3D mevt; list_add_tail(&priv->list, &mon_data_kn_priv_list); =20 return priv; @@ -3281,7 +3281,7 @@ static int mon_add_all_files(struct kernfs_node *kn, = struct rdt_domain_hdr *hdr, return ret; =20 if (!do_sum && resctrl_is_mbm_event(mevt->evtid)) - mon_event_read(&rr, r, hdr, prgrp, &hdr->cpu_mask, mevt->evtid, true); + mon_event_read(&rr, r, hdr, prgrp, &hdr->cpu_mask, mevt, true); } =20 return 0;