From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 4B9F31427A for ; Mon, 27 Jul 2026 23:34:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785195265; cv=none; b=f6JanFc3ueZtyPHPteB2Gw9iWOuEcl6htWY+i/hvErjpAkLHiXE88BZX4AbJToBeu4aay89kZviEkEe/M6rsYkp4dkjC4vry9VNZNwk88hlrtZLGiy0Q/7QNfOm29FFEofnT0W0L6d3XeIhi+SIJwZYwXrvvxV20Szn5I46PfYQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785195265; c=relaxed/simple; bh=nAuv/7NdCC+0ciRLy4Nz84UmG+QSUsSrYcVvd5NPukg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iPyndU3y+BH56PIl//b48AY7VAyQ0yZABcFepCjcbrS6DS7sjcf96Rk/cFZSf6lJPRIAEWXZuHhsuA+WxTHWxD3Z2YW0x8vVBhTq1Pp9wx/EKSGkRpLPTTkVpzmNjp3i2bTxIjIqiOOA61droxOTRk7z4pW+3PJk4NmFhV0PmXE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WyupDKr8; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WyupDKr8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B9D01F000E9; Mon, 27 Jul 2026 23:34:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785195264; bh=BsHfypMgaGhX4MzauigOUYjAYIQdT8fLijWH6rEy/xE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=WyupDKr8SMlXOX6sQ2QZCYACjotTtI67SjcmcgO3yTmK9KbF3cLg72KFdjfNefc89 dxRiKv4Qlt/avgWLeLC82vjwJcUpkU3QAHEZRsqfH+Z9HvlZTBcw4LkB9cdYFRqQhB 6GXsCZuKwj9+PuTQ25E9frJtpcxslAR+83Mw7O+iN+M+UY1QftyhvjkTPBaP49h4FS r+VKKR6hmP1xe55UzDblVHfoFqGiHA7VeBHZtcVRamvWScNGNLyBtj/hbGd8j+DzO8 wIa+gxonXL2Iqn9h3o/9CO/teotdpEzUJdB8yvVdegHpa0jX/eKpEvc+AHXSfq3pY5 iqti/bWZagLvQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Tony Luck , Reinette Chatre , "Borislav Petkov (AMD)" , Sasha Levin Subject: [PATCH 6.18.y 1/6] fs/resctrl: Split L3 dependent parts out of __mon_event_count() Date: Mon, 27 Jul 2026 19:34:15 -0400 Message-ID: <20260727233421.2423844-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026072028-reverence-sandy-7415@gregkh> References: <2026072028-reverence-sandy-7415@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tony Luck [ Upstream commit ad5c2ff75e0c53d2588dfc10eb87458e759b6bbe ] Carve out the L3 resource specific event reading code into a separate helper to support reading event data from a new monitoring resource. 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 Stable-dep-of: 52fce648607e ("fs/resctrl: Fix use-after-free during unmount") Signed-off-by: Sasha Levin --- fs/resctrl/monitor.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c index 7012a75814ac36..cdd5070d9ec71d 100644 --- a/fs/resctrl/monitor.c +++ b/fs/resctrl/monitor.c @@ -418,7 +418,7 @@ static void mbm_cntr_free(struct rdt_mon_domain *d, int cntr_id) memset(&d->cntr_cfg[cntr_id], 0, sizeof(*d->cntr_cfg)); } -static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr) +static int __l3_mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr) { int cpu = smp_processor_id(); u32 closid = rdtgrp->closid; @@ -499,6 +499,17 @@ static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr) return ret; } +static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr) +{ + switch (rr->r->rid) { + case RDT_RESOURCE_L3: + return __l3_mon_event_count(rdtgrp, rr); + default: + rr->err = -EINVAL; + return -EINVAL; + } +} + /* * mbm_bw_count() - Update bw count from values previously read by * __mon_event_count(). -- 2.53.0