[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 and Intel TDX

Posted by Ingo Molnar 9 months, 1 week 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

Signed-off-by: Ingo Molnar <mingo@kernel.org>
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: Kirill A. Shutemov <kirill.shutemov@linux.intel.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 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/configs/defconfig.x86_64 b/arch/x86/configs/defconfig.x86_64
index 156e9490e29b..514f8fdc2102 100644
--- a/arch/x86/configs/defconfig.x86_64
+++ b/arch/x86/configs/defconfig.x86_64
@@ -31,6 +31,12 @@ 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
-- 
2.45.2

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

Posted by Carlos Bilbao 9 months, 1 week ago

On 5/5/25 06:09, 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
>  - Jailhouse
>  - ACRN
>  - Intel TDX
>
> Signed-off-by: Ingo Molnar <mingo@kernel.org>
> 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: Kirill A. Shutemov <kirill.shutemov@linux.intel.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 | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/arch/x86/configs/defconfig.x86_64 b/arch/x86/configs/defconfig.x86_64
> index 156e9490e29b..514f8fdc2102 100644
> --- a/arch/x86/configs/defconfig.x86_64
> +++ b/arch/x86/configs/defconfig.x86_64
> @@ -31,6 +31,12 @@ 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


Acked-by: Carlos Bilbao <carlos.bilbao@kernel.org>

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

Posted by Vitaly Kuznetsov 9 months, 1 week ago

Ingo Molnar <mingo@kernel.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

>
> Signed-off-by: Ingo Molnar <mingo@kernel.org>
> 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: Kirill A. Shutemov <kirill.shutemov@linux.intel.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 | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/arch/x86/configs/defconfig.x86_64 b/arch/x86/configs/defconfig.x86_64
> index 156e9490e29b..514f8fdc2102 100644
> --- a/arch/x86/configs/defconfig.x86_64
> +++ b/arch/x86/configs/defconfig.x86_64
> @@ -31,6 +31,12 @@ 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

-- 
Vitaly

[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

Posted by Ingo Molnar 9 months, 1 week ago


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

> Ingo Molnar <mingo@kernel.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@kernel.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@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

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

Posted by Kirill A. Shutemov 9 months, 1 week ago

On Mon, May 05, 2025 at 01:09:40PM +0200, 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
>  - Jailhouse
>  - ACRN
>  - Intel TDX
> 
> Signed-off-by: Ingo Molnar <mingo@kernel.org>
> 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: Kirill A. Shutemov <kirill.shutemov@linux.intel.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>

Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

-- 
  Kiryl Shutsemau / Kirill A. Shutemov