issei: INTEL_SSEI should depend on X86

[PATCH] issei: INTEL_SSEI should depend on X86

Posted by Geert Uytterhoeven 1 month, 3 weeks ago

The Intel Silicon Security Engine is only present on systems with Intel
Lunar Lake CPUs.  Hence add a dependency on X86, to prevent asking the
user about this subsystem when configuring a kernel for a non-x86
architecture.

Fixes: 65f0ecb9ec85cb3a ("issei: initial driver skeleton")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 drivers/misc/issei/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/issei/Kconfig b/drivers/misc/issei/Kconfig
index 12a3fd80996946c2..bd452c95aa6de46b 100644
--- a/drivers/misc/issei/Kconfig
+++ b/drivers/misc/issei/Kconfig
@@ -2,6 +2,7 @@
 # Copyright (C) 2023-2026 Intel Corporation
 config INTEL_SSEI
 	tristate "Intel Silicon Security Engine Interface"
+	depends on X86 || COMPILE_TEST
 	help
 	  The ISSEI (Intel Silicon Security Engine Interface)
 	  subsystem provides a communication channel between the host and the
-- 
2.43.0

Re: [PATCH] issei: INTEL_SSEI should depend on X86

Posted by David Laight 1 month ago

On Thu,  6 Aug 2026 11:46:55 +0200
Geert Uytterhoeven <geert+renesas@glider.be> wrote:

> The Intel Silicon Security Engine is only present on systems with Intel
> Lunar Lake CPUs.  Hence add a dependency on X86, to prevent asking the
> user about this subsystem when configuring a kernel for a non-x86
> architecture.

Should it be X86_64 ?

> 
> Fixes: 65f0ecb9ec85cb3a ("issei: initial driver skeleton")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
>  drivers/misc/issei/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/misc/issei/Kconfig b/drivers/misc/issei/Kconfig
> index 12a3fd80996946c2..bd452c95aa6de46b 100644
> --- a/drivers/misc/issei/Kconfig
> +++ b/drivers/misc/issei/Kconfig
> @@ -2,6 +2,7 @@
>  # Copyright (C) 2023-2026 Intel Corporation
>  config INTEL_SSEI
>  	tristate "Intel Silicon Security Engine Interface"
> +	depends on X86 || COMPILE_TEST
>  	help
>  	  The ISSEI (Intel Silicon Security Engine Interface)
>  	  subsystem provides a communication channel between the host and the

Re: [PATCH] issei: INTEL_SSEI should depend on X86

Posted by Geert Uytterhoeven 1 month ago

Hi David,

On Wed, 26 Aug 2026 at 11:08, David Laight <david.laight.linux@gmail.com> wrote:
> On Thu,  6 Aug 2026 11:46:55 +0200
> Geert Uytterhoeven <geert+renesas@glider.be> wrote:
> > The Intel Silicon Security Engine is only present on systems with Intel
> > Lunar Lake CPUs.  Hence add a dependency on X86, to prevent asking the
> > user about this subsystem when configuring a kernel for a non-x86
> > architecture.
>
> Should it be X86_64 ?

I don't know. Can you still run 32-bit kernels on these CPUs?

> > --- a/drivers/misc/issei/Kconfig
> > +++ b/drivers/misc/issei/Kconfig
> > @@ -2,6 +2,7 @@
> >  # Copyright (C) 2023-2026 Intel Corporation
> >  config INTEL_SSEI
> >       tristate "Intel Silicon Security Engine Interface"
> > +     depends on X86 || COMPILE_TEST
> >       help
> >         The ISSEI (Intel Silicon Security Engine Interface)
> >         subsystem provides a communication channel between the host and the

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH] issei: INTEL_SSEI should depend on X86

Posted by David Laight 1 month ago

On Wed, 26 Aug 2026 16:03:11 +0200
Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> Hi David,
> 
> On Wed, 26 Aug 2026 at 11:08, David Laight <david.laight.linux@gmail.com> wrote:
> > On Thu,  6 Aug 2026 11:46:55 +0200
> > Geert Uytterhoeven <geert+renesas@glider.be> wrote:  
> > > The Intel Silicon Security Engine is only present on systems with Intel
> > > Lunar Lake CPUs.  Hence add a dependency on X86, to prevent asking the
> > > user about this subsystem when configuring a kernel for a non-x86
> > > architecture.  
> >
> > Should it be X86_64 ?  
> 
> I don't know. Can you still run 32-bit kernels on these CPUs?

You should be able to, but there is no need to support new features.

David

> 
> > > --- a/drivers/misc/issei/Kconfig
> > > +++ b/drivers/misc/issei/Kconfig
> > > @@ -2,6 +2,7 @@
> > >  # Copyright (C) 2023-2026 Intel Corporation
> > >  config INTEL_SSEI
> > >       tristate "Intel Silicon Security Engine Interface"
> > > +     depends on X86 || COMPILE_TEST
> > >       help
> > >         The ISSEI (Intel Silicon Security Engine Interface)
> > >         subsystem provides a communication channel between the host and the  
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
>

Re: [PATCH] issei: INTEL_SSEI should depend on X86

Posted by Geert Uytterhoeven 1 month ago

Hi David,

On Thu, 27 Aug 2026 at 10:35, David Laight <david.laight.linux@gmail.com> wrote:
> On Wed, 26 Aug 2026 16:03:11 +0200
> Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Wed, 26 Aug 2026 at 11:08, David Laight <david.laight.linux@gmail.com> wrote:
> > > On Thu,  6 Aug 2026 11:46:55 +0200
> > > Geert Uytterhoeven <geert+renesas@glider.be> wrote:
> > > > The Intel Silicon Security Engine is only present on systems with Intel
> > > > Lunar Lake CPUs.  Hence add a dependency on X86, to prevent asking the
> > > > user about this subsystem when configuring a kernel for a non-x86
> > > > architecture.
> > >
> > > Should it be X86_64 ?
> >
> > I don't know. Can you still run 32-bit kernels on these CPUs?
>
> You should be able to, but there is no need to support new features.

FTR, INTEL_SSEI_HW_HECI (which depends on INTEL_SSEI) depends
on X86, too.

> > > > --- a/drivers/misc/issei/Kconfig
> > > > +++ b/drivers/misc/issei/Kconfig
> > > > @@ -2,6 +2,7 @@
> > > >  # Copyright (C) 2023-2026 Intel Corporation
> > > >  config INTEL_SSEI
> > > >       tristate "Intel Silicon Security Engine Interface"
> > > > +     depends on X86 || COMPILE_TEST
> > > >       help
> > > >         The ISSEI (Intel Silicon Security Engine Interface)
> > > >         subsystem provides a communication channel between the host and the

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

RE: [PATCH] issei: INTEL_SSEI should depend on X86

Posted by Usyskin, Alexander 1 month ago

> Subject: Re: [PATCH] issei: INTEL_SSEI should depend on X86
> 
> Hi David,
> 
> On Thu, 27 Aug 2026 at 10:35, David Laight <david.laight.linux@gmail.com>
> wrote:
> > On Wed, 26 Aug 2026 16:03:11 +0200
> > Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > > On Wed, 26 Aug 2026 at 11:08, David Laight
> <david.laight.linux@gmail.com> wrote:
> > > > On Thu,  6 Aug 2026 11:46:55 +0200
> > > > Geert Uytterhoeven <geert+renesas@glider.be> wrote:
> > > > > The Intel Silicon Security Engine is only present on systems with Intel
> > > > > Lunar Lake CPUs.  Hence add a dependency on X86, to prevent asking
> the
> > > > > user about this subsystem when configuring a kernel for a non-x86
> > > > > architecture.
> > > >
> > > > Should it be X86_64 ?
> > >
> > > I don't know. Can you still run 32-bit kernels on these CPUs?
> >
> > You should be able to, but there is no need to support new features.
> 
> FTR, INTEL_SSEI_HW_HECI (which depends on INTEL_SSEI) depends
> on X86, too.
> 

INTEL_SSEI_HW_HECI is related to specific HW, which is x86, in theory INTEL_SSEI is HW agnostic.
But in current state having only one HW implementation it makes sense also limit
INTEL_SSEI to X86.
Not sure what benefit we'll have from X86_64 thought...

- - 
Thanks,
Sasha


> > > > > --- a/drivers/misc/issei/Kconfig
> > > > > +++ b/drivers/misc/issei/Kconfig
> > > > > @@ -2,6 +2,7 @@
> > > > >  # Copyright (C) 2023-2026 Intel Corporation
> > > > >  config INTEL_SSEI
> > > > >       tristate "Intel Silicon Security Engine Interface"
> > > > > +     depends on X86 || COMPILE_TEST
> > > > >       help
> > > > >         The ISSEI (Intel Silicon Security Engine Interface)
> > > > >         subsystem provides a communication channel between the host
> and the
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-
> m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds

RE: [PATCH] issei: INTEL_SSEI should depend on X86

Posted by Usyskin, Alexander 1 month ago

> Subject: [PATCH] issei: INTEL_SSEI should depend on X86
> 
> The Intel Silicon Security Engine is only present on systems with Intel
> Lunar Lake CPUs.  Hence add a dependency on X86, to prevent asking the
> user about this subsystem when configuring a kernel for a non-x86
> architecture.
> 

Not only Lunar Lake, also newer once but it is a right fix.

Acked-by: Alexander Usyskin <alexander.usyskin@intel.com>

> Fixes: 65f0ecb9ec85cb3a ("issei: initial driver skeleton")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
>  drivers/misc/issei/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/misc/issei/Kconfig b/drivers/misc/issei/Kconfig
> index 12a3fd80996946c2..bd452c95aa6de46b 100644
> --- a/drivers/misc/issei/Kconfig
> +++ b/drivers/misc/issei/Kconfig
> @@ -2,6 +2,7 @@
>  # Copyright (C) 2023-2026 Intel Corporation
>  config INTEL_SSEI
>  	tristate "Intel Silicon Security Engine Interface"
> +	depends on X86 || COMPILE_TEST
>  	help
>  	  The ISSEI (Intel Silicon Security Engine Interface)
>  	  subsystem provides a communication channel between the host and
> the
> --
> 2.43.0