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Re: [PATCH 2/2] xen/Kconfig: select XEN_PVHVM
- To: Jason Andryuk <jason.andryuk@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 6 Aug 2026 08:20:13 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, x86@xxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, Jason Andryuk <jandryuk@xxxxxxxxx>
- Delivery-date: Thu, 06 Aug 2026 06:20:20 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 06.08.2026 03:52, Jason Andryuk wrote:
> --- a/arch/x86/xen/Kconfig
> +++ b/arch/x86/xen/Kconfig
> @@ -51,7 +51,7 @@ config XEN_PV_DOM0
> depends on XEN_PV && XEN_DOM0
>
> config XEN_PVHVM
> - def_bool y
> + bool
> depends on XEN && X86_LOCAL_APIC
Imo "depends on" on prompt-less, default-off options are at best unhelpful
in the common case. (Aiui it can be helpful when "imply" is used instead of
"select".) Hence I think this dependency wants dropping right in this patch,
justified further by ...
> @@ -61,13 +61,15 @@ config XEN_PVHVM_SMP
> config XEN_PVHVM_GUEST
> bool "Xen PVHVM guest support"
> default y
> - depends on XEN_PVHVM && PCI
> + depends on XEN && PCI
> + select XEN_PVHVM
> help
> Support running as a Xen PVHVM guest.
>
> config XEN_PVH
> bool "Xen PVH guest support"
> - depends on XEN && XEN_PVHVM && ACPI
> + depends on XEN && ACPI
> + select XEN_PVHVM
> select PVH
> help
> Support for running as a Xen PVH guest.
... the XEN dependency being in both of the options selecting XEN_PVHVM and,
as per Jürgen's patch, X86_LOCAL_APIC being redundant anyway.
Jan
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