From:   Song Shuai <suagrfillet@gmail.com>
To:     paul.walmsley@sifive.com, palmer@dabbelt.com,
        aou@eecs.berkeley.edu, sudeep.holla@arm.com,
        pierre.gondois@arm.com, conor.dooley@microchip.com
Cc:     linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        Song Shuai <suagrfillet@gmail.com>
Subject: [PATCH] Revert "riscv: Set more data to cacheinfo"
Date:   Wed,  8 Mar 2023 14:47:34 +0800
Message-Id: <20230308064734.512457-1-suagrfillet@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

This reverts commit baf7cbd94b5688f167443a2cc3dcea3300132099.

There are some duplicate cache attributes populations executed
in both ci_leaf_init() and later cache_setup_properties().

Revert the commit baf7cbd94b56 ("riscv: Set more data to cacheinfo")
to setup only the level and type attributes at this early place.

Signed-off-by: Song Shuai <suagrfillet@gmail.com>
---
 arch/riscv/kernel/cacheinfo.c | 66 ++++++++---------------------------
 1 file changed, 15 insertions(+), 51 deletions(-)

diff --git a/arch/riscv/kernel/cacheinfo.c b/arch/riscv/kernel/cacheinfo.c
index 3a13113f1b29..305ebbdc780d 100644
--- a/arch/riscv/kernel/cacheinfo.c
+++ b/arch/riscv/kernel/cacheinfo.c
@@ -64,53 +64,12 @@ uintptr_t get_cache_geometry(u32 level, enum cache_type type)
 			   0;
 }
 
-static void ci_leaf_init(struct cacheinfo *this_leaf, enum cache_type type,
-			 unsigned int level, unsigned int size,
-			 unsigned int sets, unsigned int line_size)
+static void ci_leaf_init(struct cacheinfo *this_leaf,
+			 struct device_node *node,
+			 enum cache_type type, unsigned int level)
 {
 	this_leaf->level = level;
 	this_leaf->type = type;
-	this_leaf->size = size;
-	this_leaf->number_of_sets = sets;
-	this_leaf->coherency_line_size = line_size;
-
-	/*
-	 * If the cache is fully associative, there is no need to
-	 * check the other properties.
-	 */
-	if (sets == 1)
-		return;
-
-	/*
-	 * Set the ways number for n-ways associative, make sure
-	 * all properties are big than zero.
-	 */
-	if (sets > 0 && size > 0 && line_size > 0)
-		this_leaf->ways_of_associativity = (size / sets) / line_size;
-}
-
-static void fill_cacheinfo(struct cacheinfo **this_leaf,
-			   struct device_node *node, unsigned int level)
-{
-	unsigned int size, sets, line_size;
-
-	if (!of_property_read_u32(node, "cache-size", &size) &&
-	    !of_property_read_u32(node, "cache-block-size", &line_size) &&
-	    !of_property_read_u32(node, "cache-sets", &sets)) {
-		ci_leaf_init((*this_leaf)++, CACHE_TYPE_UNIFIED, level, size, sets, line_size);
-	}
-
-	if (!of_property_read_u32(node, "i-cache-size", &size) &&
-	    !of_property_read_u32(node, "i-cache-sets", &sets) &&
-	    !of_property_read_u32(node, "i-cache-block-size", &line_size)) {
-		ci_leaf_init((*this_leaf)++, CACHE_TYPE_INST, level, size, sets, line_size);
-	}
-
-	if (!of_property_read_u32(node, "d-cache-size", &size) &&
-	    !of_property_read_u32(node, "d-cache-sets", &sets) &&
-	    !of_property_read_u32(node, "d-cache-block-size", &line_size)) {
-		ci_leaf_init((*this_leaf)++, CACHE_TYPE_DATA, level, size, sets, line_size);
-	}
 }
 
 int populate_cache_leaves(unsigned int cpu)
@@ -121,24 +80,29 @@ int populate_cache_leaves(unsigned int cpu)
 	struct device_node *prev = NULL;
 	int levels = 1, level = 1;
 
-	/* Level 1 caches in cpu node */
-	fill_cacheinfo(&this_leaf, np, level);
+	if (of_property_read_bool(np, "cache-size"))
+		ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
+	if (of_property_read_bool(np, "i-cache-size"))
+		ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
+	if (of_property_read_bool(np, "d-cache-size"))
+		ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
 
-	/* Next level caches in cache nodes */
 	prev = np;
 	while ((np = of_find_next_cache_node(np))) {
 		of_node_put(prev);
 		prev = np;
-
 		if (!of_device_is_compatible(np, "cache"))
 			break;
 		if (of_property_read_u32(np, "cache-level", &level))
 			break;
 		if (level <= levels)
 			break;
-
-		fill_cacheinfo(&this_leaf, np, level);
-
+		if (of_property_read_bool(np, "cache-size"))
+			ci_leaf_init(this_leaf++, np, CACHE_TYPE_UNIFIED, level);
+		if (of_property_read_bool(np, "i-cache-size"))
+			ci_leaf_init(this_leaf++, np, CACHE_TYPE_INST, level);
+		if (of_property_read_bool(np, "d-cache-size"))
+			ci_leaf_init(this_leaf++, np, CACHE_TYPE_DATA, level);
 		levels = level;
 	}
 	of_node_put(np);
-- 
2.20.1