[PATCH v7 07/13] arch/x86: Bring cbm_validate function into the resource structure

[Moger, Babu]

Idea is to bring all the functions that are different between the
vendors into resource structure and initialize them dynamically.
Add _intel suffix to Intel specific functions.

Following function is implemented separately for each vendors.
cbm_validate  : Cache bitmask validate function. AMD allows
                non-contiguous masks. So, use separate functions for
                Intel and AMD.

Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
---
 arch/x86/kernel/cpu/resctrl.c             |  9 ++++++++-
 arch/x86/kernel/cpu/resctrl.h             | 11 +++++++----
 arch/x86/kernel/cpu/resctrl_ctrlmondata.c |  4 ++--
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl.c b/arch/x86/kernel/cpu/resctrl.c
index 3f77d5fcb2dc..7e4bea3bba98 100644
--- a/arch/x86/kernel/cpu/resctrl.c
+++ b/arch/x86/kernel/cpu/resctrl.c
@@ -879,7 +879,14 @@ static __init void rdt_init_res_defs_intel(void)
 	struct rdt_resource *r;
 
 	for_each_rdt_resource(r) {
-		if (r->rid == RDT_RESOURCE_MBA) {
+		if (r->rid == RDT_RESOURCE_L3 ||
+		    r->rid == RDT_RESOURCE_L3DATA ||
+		    r->rid == RDT_RESOURCE_L3CODE ||
+		    r->rid == RDT_RESOURCE_L2 ||
+		    r->rid == RDT_RESOURCE_L2DATA ||
+		    r->rid == RDT_RESOURCE_L2CODE)
+			r->cbm_validate = cbm_validate_intel;
+		else if (r->rid == RDT_RESOURCE_MBA) {
 			r->msr_base = IA32_MBA_THRTL_BASE;
 			r->msr_update = mba_wrmsr_intel;
 			r->parse_ctrlval = parse_bw_intel;
diff --git a/arch/x86/kernel/cpu/resctrl.h b/arch/x86/kernel/cpu/resctrl.h
index 8731b7c91c28..102bcffbefd7 100644
--- a/arch/x86/kernel/cpu/resctrl.h
+++ b/arch/x86/kernel/cpu/resctrl.h
@@ -410,10 +410,11 @@ struct rdt_parse_data {
  * @cache:		Cache allocation related data
  * @format_str:		Per resource format string to show domain value
  * @parse_ctrlval:	Per resource function pointer to parse control values
- * @evt_list:			List of monitoring events
- * @num_rmid:			Number of RMIDs available
- * @mon_scale:			cqm counter * mon_scale = occupancy in bytes
- * @fflags:			flags to choose base and info files
+ * @cbm_validate	Cache bitmask validate function
+ * @evt_list:		List of monitoring events
+ * @num_rmid:		Number of RMIDs available
+ * @mon_scale:		cqm counter * mon_scale = occupancy in bytes
+ * @fflags:		flags to choose base and info files
  */
 struct rdt_resource {
 	int			rid;
@@ -436,6 +437,7 @@ struct rdt_resource {
 	int (*parse_ctrlval)(struct rdt_parse_data *data,
 			     struct rdt_resource *r,
 			     struct rdt_domain *d);
+	bool (*cbm_validate)(char *buf, u32 *data, struct rdt_resource *r);
 	struct list_head	evt_list;
 	int			num_rmid;
 	unsigned int		mon_scale;
@@ -576,5 +578,6 @@ void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms);
 void cqm_handle_limbo(struct work_struct *work);
 bool has_busy_rmid(struct rdt_resource *r, struct rdt_domain *d);
 void __check_limbo(struct rdt_domain *d, bool force_free);
+bool cbm_validate_intel(char *buf, u32 *data, struct rdt_resource *r);
 
 #endif /* _ASM_X86_RESCTRL_H */
diff --git a/arch/x86/kernel/cpu/resctrl_ctrlmondata.c b/arch/x86/kernel/cpu/resctrl_ctrlmondata.c
index 78089ae8683c..71aa1d971430 100644
--- a/arch/x86/kernel/cpu/resctrl_ctrlmondata.c
+++ b/arch/x86/kernel/cpu/resctrl_ctrlmondata.c
@@ -88,7 +88,7 @@ int parse_bw_intel(struct rdt_parse_data *data, struct rdt_resource *r,
  *	are allowed (e.g. FFFFH, 0FF0H, 003CH, etc.).
  * Additionally Haswell requires at least two bits set.
  */
-static bool cbm_validate(char *buf, u32 *data, struct rdt_resource *r)
+bool cbm_validate_intel(char *buf, u32 *data, struct rdt_resource *r)
 {
 	unsigned long first_bit, zero_bit, val;
 	unsigned int cbm_len = r->cache.cbm_len;
@@ -148,7 +148,7 @@ int parse_cbm(struct rdt_parse_data *data, struct rdt_resource *r,
 		return -EINVAL;
 	}
 
-	if (!cbm_validate(data->buf, &cbm_val, r))
+	if (r->cbm_validate && !r->cbm_validate(data->buf, &cbm_val, r))
 		return -EINVAL;
 
 	if ((rdtgrp->mode == RDT_MODE_EXCLUSIVE ||
-- 
2.17.1