Re: [PATCH] platform/x86: handle Intel CPUs falsely reporting as GenuineIotel

[David Laight <david.laight.linux@gmail.com>]

On Fri,  3 Jul 2026 22:51:47 -0400
git@evalyngoemer.com wrote:

> From: Evalyn Goemer <git@evalyngoemer.com>
> 
> Certain Intel CPUs have a bit flipped in the CPUID string causing them
> to report as "GenuineIotel" leading to them potentially not being detected
> properly as an Intel CPU.

IIRC that's a BIOS bug.
A lot of that info is written in by the BIOS rather than being in the silicon.

	David

> 
> This patch fixes this by adding the "GenuineIotel" string to the
> intel_cpu_dev.c_ident array inside the arch/x86/kernel/cpu/intel.c file.
> 
> This issue can be found as existing here:
> https://github.com/InstLatx64/InstLatx64/blob/master/GenuineIotel/GenuineIotel00306C3_Haswell_CPUID5.txt
> https://web.archive.org/web/20150818115122/http://store.steampowered.com/hwsurvey/processormfg
> 
> Signed-off-by: Evalyn Goemer <git@evalyngoemer.com>
> ---
>  arch/x86/kernel/cpu/intel.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
> index abb398433..a2dcd6d05 100644
> --- a/arch/x86/kernel/cpu/intel.c
> +++ b/arch/x86/kernel/cpu/intel.c
> @@ -713,7 +713,7 @@ static void intel_detect_tlb(struct cpuinfo_x86 *c)
>  
>  static const struct cpu_dev intel_cpu_dev = {
>  	.c_vendor	= "Intel",
> -	.c_ident	= { "GenuineIntel" },
> +	.c_ident	= { "GenuineIntel", "GenuineIotel" },
>  #ifdef CONFIG_X86_32
>  	.legacy_models = {
>  		{ .family = 4, .model_names =