[Buildroot] [PATCH 1/1] arch/Config.in.x86: drop AVX512 from alderlake

[Buildroot] [PATCH 1/1] arch/Config.in.x86: drop AVX512 from alderlake

[Vincent Fazio]

Alder Lake CPUs have AVX512 support disabled [0].

To prevent potential issues, remove the AVX512 support advertisement.

This puts Buildroot inline with the GCC options [1].

[0]: https://www.intel.com/content/www/us/en/support/articles/000089918/processors.html
[1]: https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html

Fixes: e7b94130 ("arch/Config.in.x86: add sapphirerapids, alderlake, rocketlake")
Signed-off-by: Vincent Fazio <vfazio@gmail.com>
---
 arch/Config.in.x86 | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/Config.in.x86 b/arch/Config.in.x86
index 38e486eafd..8ddd1fa994 100644
--- a/arch/Config.in.x86
+++ b/arch/Config.in.x86
@@ -450,7 +450,6 @@ config BR2_x86_alderlake
 	select BR2_X86_CPU_HAS_SSE42
 	select BR2_X86_CPU_HAS_AVX
 	select BR2_X86_CPU_HAS_AVX2
-	select BR2_X86_CPU_HAS_AVX512
 	select BR2_ARCH_NEEDS_GCC_AT_LEAST_11
 config BR2_x86_rocketlake
 	bool "rocketlake"
-- 
2.34.1

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Re: [Buildroot] [PATCH 1/1] arch/Config.in.x86: drop AVX512 from alderlake

[Thomas Petazzoni via buildroot]

On Thu, 27 Jul 2023 15:36:52 -0500
Vincent Fazio <vfazio@gmail.com> wrote:

> Alder Lake CPUs have AVX512 support disabled [0].
> 
> To prevent potential issues, remove the AVX512 support advertisement.
> 
> This puts Buildroot inline with the GCC options [1].
> 
> [0]: https://www.intel.com/content/www/us/en/support/articles/000089918/processors.html
> [1]: https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html
> 
> Fixes: e7b94130 ("arch/Config.in.x86: add sapphirerapids, alderlake, rocketlake")
> Signed-off-by: Vincent Fazio <vfazio@gmail.com>
> ---
>  arch/Config.in.x86 | 1 -
>  1 file changed, 1 deletion(-)

Applied to master, thanks.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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Re: [Buildroot] [PATCH 1/1] arch/Config.in.x86: drop AVX512 from alderlake

[Peter Korsgaard]

>>>>> "Vincent" == Vincent Fazio <vfazio@gmail.com> writes:

 > Alder Lake CPUs have AVX512 support disabled [0].
 > To prevent potential issues, remove the AVX512 support advertisement.

 > This puts Buildroot inline with the GCC options [1].

 > [0]: https://www.intel.com/content/www/us/en/support/articles/000089918/processors.html
 > [1]: https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html

 > Fixes: e7b94130 ("arch/Config.in.x86: add sapphirerapids, alderlake, rocketlake")
 > Signed-off-by: Vincent Fazio <vfazio@gmail.com>

Committed to 2023.02.x and 2023.05.x, thanks.

-- 
Bye, Peter Korsgaard
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