linux-kernel - [PATCH -v2 09/15] 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: <aBpArFOCEhP5ZESO@gmail.com>
Date: Tue, 6 May 2025 19:02:36 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Vitaly Kuznetsov <vkuznets@...hat.com>
Cc: linux-kernel@...r.kernel.org, "H . Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	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>,
	Juergen Gross <jgross@...e.com>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.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: [PATCH -v2 09/15] x86/kconfig/64: Enable more virtualization guest
 options in the defconfig: enable Xen, Xen_PVH, Jailhouse, ACRN, Intel TDX
 and Hyper-V


* Vitaly Kuznetsov <vkuznets@...hat.com> wrote:

> Ingo Molnar <mingo@...nel.org> writes:
> 
> > 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
> 
> Out of curiosity and to get the idea what's good for defconfig and
> what's not: do we want to enable Hyper-V and its drivers as well? I
> think all popular distros enable it nowdays because of Azure. E.g.
> 
> CONFIG_PCI_HYPERV=m
> CONFIG_HYPERV_STORAGE=m
> CONFIG_HYPERV_NET=m
> CONFIG_HYPERV_KEYBOARD=m
> CONFIG_DRM_HYPERV=m
> CONFIG_HID_HYPERV_MOUSE=m
> CONFIG_HYPERV=m
> CONFIG_HYPERV_UTILS=m
> CONFIG_HYPERV_BALLOON=m

We can certainly do that. The only reason I missed it is because 
CONFIG_HYPERV et al have hidden away in the 'drivers' section of the 
.config, which I didn't examine. The other guest support options are in 
the generic config section.

Updated patch attached.

Thanks,

	Ingo

=================================>
From: Ingo Molnar <mingo@...nel.org>
Date: Mon, 5 May 2025 10:49:11 +0200
Subject: [PATCH] x86/kconfig/64: Enable more virtualization guest options in the defconfig: enable Xen, Xen_PVH, Jailhouse, ACRN, Intel TDX and Hyper-V

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

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Ard Biesheuvel <ardb@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Carlos Bilbao <carlos.bilbao@...nel.org>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Elena Reshetova <elena.reshetova@...el.com>
Cc: Fei Li <fei1.li@...el.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Jan Kiszka <jan.kiszka@...mens.com>
Cc: Juergen Gross <jgross@...e.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Michal Marek <michal.lkml@...kovi.net>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Sean Christopherson <seanjc@...gle.com>
Cc: Stefano Stabellini <sstabellini@...nel.org>
Cc: Vitaly Kuznetsov <vkuznets@...hat.com>
---
 arch/x86/configs/defconfig.x86_64 | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/arch/x86/configs/defconfig.x86_64 b/arch/x86/configs/defconfig.x86_64
index 156e9490e29b..df786b8b4e85 100644
--- a/arch/x86/configs/defconfig.x86_64
+++ b/arch/x86/configs/defconfig.x86_64
@@ -30,7 +30,12 @@ CONFIG_PROFILING=y
 CONFIG_KEXEC=y
 CONFIG_SMP=y
 CONFIG_HYPERVISOR_GUEST=y
-CONFIG_PARAVIRT=y
+CONFIG_PARAVIRT_SPINLOCKS=y
+CONFIG_XEN=y
+CONFIG_XEN_PVH=y
+CONFIG_JAILHOUSE_GUEST=y
+CONFIG_ACRN_GUEST=y
+CONFIG_INTEL_TDX_GUEST=y
 CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
 CONFIG_X86_MSR=y
 CONFIG_X86_CPUID=y
@@ -128,6 +133,7 @@ CONFIG_NET_9P=y
 CONFIG_NET_9P_VIRTIO=y
 CONFIG_PCI=y
 CONFIG_PCIEPORTBUS=y
+CONFIG_PCI_HYPERV=y
 CONFIG_HOTPLUG_PCI=y
 CONFIG_PCCARD=y
 CONFIG_YENTA=y
@@ -168,6 +174,7 @@ CONFIG_SKY2=y
 CONFIG_FORCEDETH=y
 CONFIG_8139TOO=y
 CONFIG_R8169=y
+CONFIG_HYPERV_NET=y
 CONFIG_INPUT_EVDEV=y
 CONFIG_INPUT_JOYSTICK=y
 CONFIG_INPUT_TABLET=y
@@ -198,6 +205,7 @@ CONFIG_AGP_INTEL=y
 CONFIG_DRM=y
 CONFIG_DRM_I915=y
 CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_DRM_HYPERV=y
 CONFIG_SOUND=y
 CONFIG_SND=y
 CONFIG_SND_HRTIMER=y
@@ -214,6 +222,7 @@ CONFIG_HID_PETALYNX=y
 CONFIG_HID_SAMSUNG=y
 CONFIG_HID_SONY=y
 CONFIG_HID_SUNPLUS=y
+CONFIG_HID_HYPERV_MOUSE=y
 CONFIG_HID_TOPSEED=y
 CONFIG_HID_PID=y
 CONFIG_USB_HIDDEV=y
@@ -231,6 +240,9 @@ CONFIG_RTC_CLASS=y
 CONFIG_DMADEVICES=y
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_INPUT=y
+CONFIG_HYPERV=y
+CONFIG_HYPERV_UTILS=y
+CONFIG_HYPERV_BALLOON=y
 CONFIG_EEEPC_LAPTOP=y
 CONFIG_AMD_IOMMU=y
 CONFIG_INTEL_IOMMU=y