[tip: x86/cache] x86/resctrl: Swizzle rdt_resource and resctrl_schema in pseudo_lock_region

[tip-bot2 for James Morse]

The following commit has been merged into the x86/cache branch of tip:

Commit-ID:     32150edd3fcf6ee002668878e0b010d402db29b2
Gitweb:        https://git.kernel.org/tip/32150edd3fcf6ee002668878e0b010d402db29b2
Author:        James Morse <james.morse@xxxxxxx>
AuthorDate:    Wed, 28 Jul 2021 17:06:23 
Committer:     Borislav Petkov <bp@xxxxxxx>
CommitterDate: Wed, 11 Aug 2021 15:51:45 +02:00

x86/resctrl: Swizzle rdt_resource and resctrl_schema in pseudo_lock_region

struct pseudo_lock_region points to the rdt_resource.

Once the resources are merged, this won't be unique. The resource name
is moving into the schema, so that the filesystem portions of resctrl can
generate it.

Swap pseudo_lock_region's rdt_resource pointer for a schema pointer.

Signed-off-by: James Morse <james.morse@xxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Reviewed-by: Jamie Iles <jamie@xxxxxxxxxxxx>
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Tested-by: Babu Moger <babu.moger@xxxxxxx>
Link: https://lkml.kernel.org/r/20210728170637.25610-11-james.morse@xxxxxxx
---
 arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 4 ++--
 arch/x86/kernel/cpu/resctrl/internal.h    | 6 +++---
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 8 ++++----
 arch/x86/kernel/cpu/resctrl/rdtgroup.c    | 4 ++--
 4 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
index 219b057..0ee1ded 100644
--- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
+++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c
@@ -227,7 +227,7 @@ next:
 				 * the required initialization for single
 				 * region and return.
 				 */
-				rdtgrp->plr->r = r;
+				rdtgrp->plr->s = s;
 				rdtgrp->plr->d = d;
 				rdtgrp->plr->cbm = d->new_ctrl;
 				d->plr = rdtgrp->plr;
@@ -426,7 +426,7 @@ int rdtgroup_schemata_show(struct kernfs_open_file *of,
 				ret = -ENODEV;
 			} else {
 				seq_printf(s, "%s:%d=%x\n",
-					   rdtgrp->plr->r->name,
+					   rdtgrp->plr->s->res->name,
 					   rdtgrp->plr->d->id,
 					   rdtgrp->plr->cbm);
 			}
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index 5d5debe..c8521ef 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -163,8 +163,8 @@ struct mongroup {
 
 /**
  * struct pseudo_lock_region - pseudo-lock region information
- * @r:			RDT resource to which this pseudo-locked region
- *			belongs
+ * @s:			Resctrl schema for the resource to which this
+ *			pseudo-locked region belongs
  * @d:			RDT domain to which this pseudo-locked region
  *			belongs
  * @cbm:		bitmask of the pseudo-locked region
@@ -184,7 +184,7 @@ struct mongroup {
  * @pm_reqs:		Power management QoS requests related to this region
  */
 struct pseudo_lock_region {
-	struct rdt_resource	*r;
+	struct resctrl_schema	*s;
 	struct rdt_domain	*d;
 	u32			cbm;
 	wait_queue_head_t	lock_thread_wq;
diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index 17868ac..3c035a7 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -250,7 +250,7 @@ static void pseudo_lock_region_clear(struct pseudo_lock_region *plr)
 	plr->line_size = 0;
 	kfree(plr->kmem);
 	plr->kmem = NULL;
-	plr->r = NULL;
+	plr->s = NULL;
 	if (plr->d)
 		plr->d->plr = NULL;
 	plr->d = NULL;
@@ -294,10 +294,10 @@ static int pseudo_lock_region_init(struct pseudo_lock_region *plr)
 
 	ci = get_cpu_cacheinfo(plr->cpu);
 
-	plr->size = rdtgroup_cbm_to_size(plr->r, plr->d, plr->cbm);
+	plr->size = rdtgroup_cbm_to_size(plr->s->res, plr->d, plr->cbm);
 
 	for (i = 0; i < ci->num_leaves; i++) {
-		if (ci->info_list[i].level == plr->r->cache_level) {
+		if (ci->info_list[i].level == plr->s->res->cache_level) {
 			plr->line_size = ci->info_list[i].coherency_line_size;
 			return 0;
 		}
@@ -800,7 +800,7 @@ bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned long cbm
 	unsigned long cbm_b;
 
 	if (d->plr) {
-		cbm_len = d->plr->r->cache.cbm_len;
+		cbm_len = d->plr->s->res->cache.cbm_len;
 		cbm_b = d->plr->cbm;
 		if (bitmap_intersects(&cbm, &cbm_b, cbm_len))
 			return true;
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 53d281a..305dcf8 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1439,8 +1439,8 @@ static int rdtgroup_size_show(struct kernfs_open_file *of,
 			ret = -ENODEV;
 		} else {
 			seq_printf(s, "%*s:", max_name_width,
-				   rdtgrp->plr->r->name);
-			size = rdtgroup_cbm_to_size(rdtgrp->plr->r,
+				   rdtgrp->plr->s->res->name);
+			size = rdtgroup_cbm_to_size(rdtgrp->plr->s->res,
 						    rdtgrp->plr->d,
 						    rdtgrp->plr->cbm);
 			seq_printf(s, "%d=%u\n", rdtgrp->plr->d->id, size);