x86/intel_rdt: Implement show_options() for resctrlfs

76ae054c · Shaohua Li <[email protected]> · 2016-12-02 14:21:06 -08:00

Implement show_options() callback for intel resource control filesystem
to expose the active mount options in /proc/

Signed-off-by: Shaohua Li <[email protected]>
Cc: Fenghua Yu <[email protected]>
Link: http://lkml.kernel.org/r/7dce7c1886ac9289442d254ea18322c92bd968da.1480717072.git.shli@fb.com
Signed-off-by: Thomas Gleixner <[email protected]>

Commit: 76ae054c69a745ded388fc4ae70422d74c5bc77d
Parents: 74fcdae1

Changes

1 files changed · +10 −2

File	Status	Add	Del	Content
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c	modified	+10	−2	View file

arch/x86/kernel/cpu/intel_rdt_rdtgroup.c

View file

diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
index 1afd3f3..8af04af 100644
--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
@@ -1036,9 +1036,17 @@ out:
 	return ret;
 }
 
+static int rdtgroup_show_options(struct seq_file *seq, struct kernfs_root *kf)
+{
+	if (rdt_resources_all[RDT_RESOURCE_L3DATA].enabled)
+		seq_puts(seq, ",cdp");
+	return 0;
+}
+
 static struct kernfs_syscall_ops rdtgroup_kf_syscall_ops = {
-	.mkdir	= rdtgroup_mkdir,
-	.rmdir	= rdtgroup_rmdir,
+	.mkdir		= rdtgroup_mkdir,
+	.rmdir		= rdtgroup_rmdir,
+	.show_options	= rdtgroup_show_options,
 };
 
 static int __init rdtgroup_setup_root(void)