linux-kernel - [PATCH v2 3/3] ARM: samsung: exynos5250: Allow CPU1 to boot

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Message-Id: <20251125-google-manta-v2-3-0f097cfff39c@timmermann.space>
Date: Tue, 25 Nov 2025 16:12:42 +0100
From: Lukas Timmermann <linux@...mermann.space>
To: Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Russell King <linux@...linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Lukas Timmermann <linux@...mermann.space>, 
 Alexandre Marquet <tb@...arquet.fr>
Subject: [PATCH v2 3/3] ARM: samsung: exynos5250: Allow CPU1 to boot

From: Alexandre Marquet <tb@...arquet.fr>

Add an exception to let the secondary CPU boot.

Signed-off-by: Alexandre Marquet <tb@...arquet.fr>
Signed-off-by: Lukas Timmermann <linux@...mermann.space>
---
 arch/arm/mach-exynos/firmware.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index a5e22678e27b..80e645b4d338 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -61,10 +61,10 @@ static int exynos_cpu_boot(int cpu)
 	 * Exynos3250 doesn't need to send smc command for secondary CPU boot
 	 * because Exynos3250 removes WFE in secure mode.
 	 *
-	 * On Exynos5 devices the call is ignored by trustzone firmware.
+	 * On most Exynos5 devices the call is ignored by trustzone firmware.
 	 */
 	if (!soc_is_exynos4210() && !soc_is_exynos4212() &&
-	    !soc_is_exynos4412())
+	    !soc_is_exynos4412() && !of_machine_is_compatible("samsung,nexus10-manta"))
 		return 0;
 
 	/*

-- 
2.52.0