From:   Tony Luck <tony.luck@intel.com>
To:     Fenghua Yu <fenghua.yu@intel.com>,
        Reinette Chatre <reinette.chatre@intel.com>,
        Peter Newman <peternewman@google.com>,
        Jonathan Corbet <corbet@lwn.net>, x86@kernel.org
Cc:     Shaopeng Tan <tan.shaopeng@fujitsu.com>,
        James Morse <james.morse@arm.com>,
        Jamie Iles <quic_jiles@quicinc.com>,
        Babu Moger <babu.moger@amd.com>, linux-kernel@vger.kernel.org,
        linux-doc@vger.kernel.org, patches@lists.linux.dev,
        Tony Luck <tony.luck@intel.com>
Subject: [PATCH 5/7] x86/resctrl: Add a new "snc_ways" file to the monitoring info directory.
Date:   Thu, 26 Jan 2023 10:41:55 -0800
Message-Id: <20230126184157.27626-6-tony.luck@intel.com>
In-Reply-To: <20230126184157.27626-1-tony.luck@intel.com>
References: <20230126184157.27626-1-tony.luck@intel.com>
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Make it easy for the user to tell if Sub-NUMA Cluster is enabled by
providing an info/ file.

Signed-off-by: Tony Luck <tony.luck@intel.com>
---
 arch/x86/kernel/cpu/resctrl/rdtgroup.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index a0dc64a70d01..392e7a08d083 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -997,6 +997,14 @@ static int rdt_num_rmids_show(struct kernfs_open_file *of,
 	return 0;
 }
 
+static int rdt_snc_ways_show(struct kernfs_open_file *of,
+			     struct seq_file *seq, void *v)
+{
+	seq_printf(seq, "%d\n", snc_ways);
+
+	return 0;
+}
+
 static int rdt_mon_features_show(struct kernfs_open_file *of,
 				 struct seq_file *seq, void *v)
 {
@@ -1451,6 +1459,13 @@ static struct rftype res_common_files[] = {
 		.seq_show	= rdt_num_rmids_show,
 		.fflags		= RF_MON_INFO,
 	},
+	{
+		.name		= "snc_ways",
+		.mode		= 0444,
+		.kf_ops		= &rdtgroup_kf_single_ops,
+		.seq_show	= rdt_snc_ways_show,
+		.fflags		= RF_MON_INFO,
+	},
 	{
 		.name		= "cbm_mask",
 		.mode		= 0444,
-- 
2.39.1