linux-kernel - Re: [PATCH 07/13] x86/kconfig/64: Enable more virtualization guest options in the defconfig: enable Xen, Xen_PVH, Jailhouse, ACRN, Intel TDX and Hyper-V

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Message-ID: <20250614103055.GL2278213@noisy.programming.kicks-ass.net>
Date: Sat, 14 Jun 2025 12:30:55 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Michael Kelley <mhklinux@...look.com>
Cc: Ingo Molnar <mingo@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Vitaly Kuznetsov <vkuznets@...hat.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jürgen Groß <jgross@...e.com>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
	Ard Biesheuvel <ardb@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	Carlos Bilbao <carlos.bilbao@...nel.org>,
	David Woodhouse <dwmw@...zon.co.uk>,
	Elena Reshetova <elena.reshetova@...el.com>,
	Fei Li <fei1.li@...el.com>, Jan Kiszka <jan.kiszka@...mens.com>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	Michal Marek <michal.lkml@...kovi.net>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Sean Christopherson <seanjc@...gle.com>,
	Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH 07/13] x86/kconfig/64: Enable more virtualization guest
 options in the defconfig: enable Xen, Xen_PVH, Jailhouse, ACRN, Intel TDX
 and Hyper-V

On Thu, May 15, 2025 at 11:40:06PM +0000, Michael Kelley wrote:
> From: Ingo Molnar <mingo@...nel.org> Sent: Thursday, May 15, 2025 6:27 AM
> > 
> > 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
> >  - Jailhouse
> >  - ACRN
> >  - Intel TDX
> >  - Hyper-V
> 
> I built and tested a Hyper-V guest with defconfig. The Hyper-V storage
> and keyboard drivers are pulled in automatically, so my previous
> comment about them being "missing" is moot.
> 
> But the Linux console for each Hyper-V guest is a synthetic graphics
> console, 

So clearly I'm a caveman like creature, but surely those things have
serial console, right? I mean, that's how I access all my test boxes,
serial console and ssh. What more does one really need :-)

/me crawls back into his cave.