[Buildroot] [PATCH next 1/1] arch/arm: add the Cortex-A720 core

[Buildroot] [PATCH next 1/1] arch/arm: add the Cortex-A720 core

[Julien Olivain]

This commit adds the Cortex-A720 core, which is a armv9.2a ISA.
See: [1] [2].

This CPU support was added in GCC 14. See [3] [4].

Cortex-A720 processors are included in boards such as the
Radxa Orion O6. See [5].

This CPU supports Aarch64 only at all exception levels (EL0 to EL3).

[1] https://developer.arm.com/Processors/Cortex-A720
[2] https://developer.arm.com/documentation/102530/0002/The-Cortex-A720--core/Cortex-A720--core-features
[3] https://gcc.gnu.org/gcc-14/changes.html#aarch64
[4] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/aarch64/aarch64-cores.def;hb=releases/gcc-14.1.0#l180
[5] https://radxa.com/products/orion/o6/

Signed-off-by: Julien Olivain <ju.o@free.fr>
---
 arch/Config.in.arm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/Config.in.arm b/arch/Config.in.arm
index 546ba8070e..c5695c1eba 100644
--- a/arch/Config.in.arm
+++ b/arch/Config.in.arm
@@ -518,6 +518,14 @@ config BR2_neoverse_n2
 	select BR2_ARM_CPU_HAS_FP_ARMV8
 	select BR2_ARM_CPU_ARMV9A
 	select BR2_ARCH_NEEDS_GCC_AT_LEAST_11
+
+comment "armv9.2a cores"
+config BR2_cortex_a720
+	bool "Cortex-A720 (aka hunter)"
+	depends on BR2_ARCH_IS_64
+	select BR2_ARM_CPU_HAS_FP_ARMV8
+	select BR2_ARM_CPU_ARMV9A
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_14
 endchoice
 
 config BR2_ARM_ENABLE_NEON
@@ -914,6 +922,8 @@ config BR2_GCC_TARGET_CPU
 	# armv9.0a
 	default "cortex-a710"	if BR2_cortex_a710
 	default "neoverse-n2"	if BR2_neoverse_n2
+	# armv9.2a
+	default "cortex-a720"	if BR2_cortex_a720
 
 config BR2_GCC_TARGET_ABI
 	default "aapcs-linux"	if BR2_arm || BR2_armeb
-- 
2.49.0

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Re: [Buildroot] [PATCH next 1/1] arch/arm: add the Cortex-A720 core

[Thomas Petazzoni via buildroot]

On Fri, 30 May 2025 01:08:51 +0200
Julien Olivain <ju.o@free.fr> wrote:

> This commit adds the Cortex-A720 core, which is a armv9.2a ISA.
> See: [1] [2].
> 
> This CPU support was added in GCC 14. See [3] [4].
> 
> Cortex-A720 processors are included in boards such as the
> Radxa Orion O6. See [5].
> 
> This CPU supports Aarch64 only at all exception levels (EL0 to EL3).
> 
> [1] https://developer.arm.com/Processors/Cortex-A720
> [2] https://developer.arm.com/documentation/102530/0002/The-Cortex-A720--core/Cortex-A720--core-features
> [3] https://gcc.gnu.org/gcc-14/changes.html#aarch64
> [4] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/aarch64/aarch64-cores.def;hb=releases/gcc-14.1.0#l180
> [5] https://radxa.com/products/orion/o6/
> 
> Signed-off-by: Julien Olivain <ju.o@free.fr>
> ---
>  arch/Config.in.arm | 10 ++++++++++
>  1 file changed, 10 insertions(+)

Applied to next, thanks.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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