[v1] x86/kconfig: Enable various kernel features in the defconfig, add the 'x86_32' subarchitecture build target and misc cleanups

[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

Posted by Ingo Molnar 7 months, 2 weeks ago

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@kernel.org>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Carlos Bilbao <carlos.bilbao@kernel.org>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Cc: Fei Li <fei1.li@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Vitaly Kuznetsov <vkuznets@redhat.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
-- 
2.45.2

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

Posted by Jürgen Groß 7 months, 2 weeks ago

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


Juergen

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

Posted by Ingo Molnar 7 months, 1 week ago

* 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