From 3dbb2a0aaa66e84f7318f7bfb0f9411cf3ef5b4e Mon Sep 17 00:00:00 2001 From: Julien Olivain Date: Tue, 3 Mar 2026 21:27:07 +0100 Subject: [PATCH] arch/arm: add the Neoverse-V3AE core This commit adds the Neoverse-V3AE (Automotive Enhanced) core, which is an armv9.2a ISA. See: [1] [2]. This CPU support was added in GCC 15. See [3] [4] [5]. This CPU supports Aarch64 only at all exception levels (EL0 to EL3). This CPU is present in NVIDIA Jetson Thor / Tegra T264 [6]. Note: at the time of this commit, the latest binutils v2.46 does not include a Neoverse-V3AE support for its '-mcpu' option. See [7]. This is not an issue because gcc will call the "as" assembler with the relevant "-march=armv9.2-a+EXTENSION..." options. Binutils supports "armv9.2-a" since upstream commit [8] (first included in 2.38), and the oldest Binutils version in Buildroot is 2.44. [1] https://developer.arm.com/Processors/Neoverse%20V3AE [2] https://developer.arm.com/documentation/101595/0002/The-Neoverse-V3AE--core/Neoverse-V3AE--core-features [3] https://gcc.gnu.org/gcc-15/changes.html#aarch64 [4] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/aarch64/aarch64-cores.def;hb=releases/gcc-15.1.0#l222 [5] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=7ca2a803c4a0d8e894f0b36625a2c838c54fb4cd [6] https://www.nvidia.com/en-us/autonomous-machines/embedded-systems/jetson-thor/ [7] https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gas/config/tc-aarch64.c;h=cd76163488c48e45d43c35b2704d637999d51015;hb=3e93b95c3ae3f00a0283ddbab8029cbc07d96aff#l10833 [8] https://sourceware.org/git/?p=binutils-gdb.git;a=commitdiff;h=3518022233e6b757c57d3deb7723fd91214fe036 Signed-off-by: Julien Olivain --- arch/Config.in.arm | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/Config.in.arm b/arch/Config.in.arm index ff301785e5..eb5babe29b 100644 --- a/arch/Config.in.arm +++ b/arch/Config.in.arm @@ -544,6 +544,12 @@ config BR2_neoverse_v3 select BR2_ARM_CPU_HAS_FP_ARMV8 select BR2_ARM_CPU_ARMV9A select BR2_ARCH_NEEDS_GCC_AT_LEAST_15 +config BR2_neoverse_v3ae + bool "neoverse-V3AE (aka poseidon)" + 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_15 endchoice config BR2_ARM_ENABLE_NEON @@ -945,6 +951,7 @@ config BR2_GCC_TARGET_CPU # armv9.2a default "cortex-a720" if BR2_cortex_a720 default "neoverse-v3" if BR2_neoverse_v3 + default "neoverse-v3ae" if BR2_neoverse_v3ae config BR2_GCC_TARGET_ABI default "aapcs-linux" if BR2_arm || BR2_armeb