Re: [PATCH 09/15] x86/kconfig/64: Enable more virtualization guest options in the defconfig: enable Xen, Xen_PVH, Jailhouse, ACRN, Intel TDX and Hyper-V

[Ingo Molnar <mingo@kernel.org>]

* Jürgen Groß <jgross@suse.com> wrote:

> On 06.05.25 19:09, Ingo Molnar wrote:
> > Since the x86 defconfig aims to be a distro kernel work-alike with
> > fewer drivers and a shorter build time, refresh all the virtualization
> > guest Kconfig features, enabling paravirt spinlocks, and
> > enabling the guest support code for the following guests:
> > 
> >   - Xen
> >   - Xen_PVH
> 
> With those it might be a good idea to add:
> 
> CONFIG_XEN_BLKDEV_FRONTEND=m
> CONFIG_XEN_NETDEV_FRONTEND=m
> CONFIG_HVC_XEN=y
> CONFIG_XEN_BALLOON=y

Yeah, and these already get enabled automatically, due to their 
defaults:

 starship:~/mingo.tip.git> grep -E 'CONFIG_XEN_BLKDEV_FRONTEND|CONFIG_XEN_NETDEV_FRONTEND|CONFIG_HVC_XEN|CONFIG_XEN_BALLOON' .config
 CONFIG_XEN_BLKDEV_FRONTEND=y
 CONFIG_XEN_NETDEV_FRONTEND=y
 CONFIG_HVC_XEN=y
 CONFIG_HVC_XEN_FRONTEND=y
 CONFIG_XEN_BALLOON=y

defconfig files do not include entries that get enabled anyway - this 
compresses defconfig files substantially.

Thanks,

	Ingo