[PATCH v5 8/8] x86/resctrl: Introduce RFTYPE_DEBUG flag

[Babu Moger]

Introduce RFTYPE_DEBUG flag which can be used to add files when
resctrl is mounted with "-o debug" option. RFTYPE_DEBUG is OR'd
with other RFTYPE_ flags. These other flags decide where in resctrl
structure these files should be created.

Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
---
 arch/x86/kernel/cpu/resctrl/internal.h |    1 +
 arch/x86/kernel/cpu/resctrl/rdtgroup.c |    5 +++++
 2 files changed, 6 insertions(+)

diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index c07c6517d856..5bc8d371fc3e 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -294,6 +294,7 @@ struct rdtgroup {
 #define RFTYPE_TOP			BIT(6)
 #define RFTYPE_RES_CACHE		BIT(8)
 #define RFTYPE_RES_MB			BIT(9)
+#define RFTYPE_DEBUG			BIT(10)
 #define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
 #define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
 #define RFTYPE_TOP_INFO			(RFTYPE_INFO | RFTYPE_TOP)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index e03cb01c4742..9e42ecbb9063 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1862,6 +1862,7 @@ static struct rftype res_common_files[] = {
 		.mode		= 0444,
 		.kf_ops		= &rdtgroup_kf_single_ops,
 		.seq_show	= rdtgroup_rmid_show,
+		.fflags		= RFTYPE_BASE | RFTYPE_DEBUG,
 	},
 	{
 		.name		= "schemata",
@@ -1891,6 +1892,7 @@ static struct rftype res_common_files[] = {
 		.mode		= 0444,
 		.kf_ops		= &rdtgroup_kf_single_ops,
 		.seq_show	= rdtgroup_closid_show,
+		.fflags		= RFTYPE_CTRL_BASE | RFTYPE_DEBUG,
 	},
 
 };
@@ -1905,6 +1907,9 @@ static int rdtgroup_add_files(struct kernfs_node *kn, unsigned long fflags)
 
 	lockdep_assert_held(&rdtgroup_mutex);
 
+	if (resctrl_debug)
+		fflags |= RFTYPE_DEBUG;
+
 	for (rft = rfts; rft < rfts + len; rft++) {
 		if (rft->fflags && ((fflags & rft->fflags) == rft->fflags)) {
 			ret = rdtgroup_add_file(kn, rft);