linux-kernel - [PATCH 5.15 189/846] arm64: dts: ti: k3-j721e: Fix the L2 cache sets

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Message-Id: <20220124184107.482522621@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:35:06 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Peng Fan <peng.fan@....com>,
        Nishanth Menon <nm@...com>, Pratyush Yadav <p.yadav@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 189/846] arm64: dts: ti: k3-j721e: Fix the L2 cache sets

From: Nishanth Menon <nm@...com>

[ Upstream commit e9ba3a5bc6fdc2c796c69fdaf5ed6c9957cf9f9d ]

A72's L2 cache[1] on J721e[2] is 1MB. A72's L2 is fixed line length of
64 bytes and 16-way set-associative cache structure.

1MB of L2 / 64 (line length) = 16384 ways
16384 ways / 16 = 1024 sets

Fix the l2 cache-sets.

[1] https://developer.arm.com/documentation/100095/0003/Level-2-Memory-System/About-the-L2-memory-system
[2] http://www.ti.com/lit/pdf/spruil1

Fixes: 2d87061e70de ("arm64: dts: ti: Add Support for J721E SoC")
Reported-by: Peng Fan <peng.fan@....com>
Signed-off-by: Nishanth Menon <nm@...com>
Reviewed-by: Pratyush Yadav <p.yadav@...com>
Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
Link: https://lore.kernel.org/r/20211113043639.4413-1-nm@ti.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/ti/k3-j721e.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e.dtsi b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
index 9f1d25d57a693..69ce048a2136e 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
@@ -85,7 +85,7 @@
 		cache-level = <2>;
 		cache-size = <0x100000>;
 		cache-line-size = <64>;
-		cache-sets = <2048>;
+		cache-sets = <1024>;
 		next-level-cache = <&msmc_l3>;
 	};
 
-- 
2.34.1