linux-kernel - Re: [PATCH -v2] x86: Add a Kconfig shortcut for kvm guest kernel

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Date:	Fri, 26 Apr 2013 08:42:50 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Marcelo Tosatti <mtosatti@...hat.com>,
	Pekka Enberg <penberg@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Fengguang Wu <fengguang.wu@...el.com>,
	lkml <linux-kernel@...r.kernel.org>, x86-ml <x86@...nel.org>,
	kvm@...r.kernel.org
Subject: Re: [PATCH -v2] x86: Add a Kconfig shortcut for kvm guest kernel


* Borislav Petkov <bp@...en8.de> wrote:

> From: Borislav Petkov <bp@...e.de>
> Date: Tue, 16 Apr 2013 18:24:34 +0200
> Subject: [PATCH -v2] x86: Add a Kconfig shortcut for kvm guest kernel
> 
> This is pretty useful for the case where people want to boot the
> resulting kernel in qemu/kvm. Instead of going and searching for each
> required option through the Kconfig maze, this single option should
> simply enable everything required/good to have to boot the resulting
> kernel in the guest.

Please mention:

 ' This patch is based on a similar utility patch of the external
   lkvm tree. '

> 
> Cc: Fengguang Wu <fengguang.wu@...el.com>
> Originally-by: Pekka Enberg <penberg@...nel.org>
> Originally-by: Sasha Levin <levinsasha928@...il.com>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> ---
> 
> 
> Here's v2 which should be addressing all review comments so far.
> 
> 
>  arch/x86/Kconfig | 38 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 5651374d179f..76a95ffa959a 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -680,6 +680,44 @@ config KVM_GUEST
>  	  underlying device model, the host provides the guest with
>  	  timing infrastructure such as time of day, and system time
>  
> +config KVM_GUEST_COMMODITY_OPTIONS

Call this KVM_GUEST_COMMON_OPTIONS?

> +	bool "Enable commodity options for a standalone KVM guest"
> +	depends on KVM_GUEST
> +	select NET
> +	select NETDEVICES
> +	select BLOCK
> +	select BLK_DEV
> +	select NETWORK_FILESYSTEMS
> +	select INET
> +	select EXPERIMENTAL
> +	select TTY
> +	select SERIAL_8250
> +	select SERIAL_8250_CONSOLE
> +	select IP_PNP
> +	select IP_PNP_DHCP
> +	select BINFMT_ELF
> +	select PCI_MSI
> +	select HAVE_ARCH_KGDB
> +	select DEBUG_KERNEL
> +	select KGDB
> +	select KGDB_SERIAL_CONSOLE
> +	select VIRTUALIZATION
> +	select VIRTIO
> +	select VIRTIO_RING
> +	select VIRTIO_PCI
> +	select VIRTIO_BLK
> +	select VIRTIO_CONSOLE
> +	select VIRTIO_NET
> +	select 9P_FS
> +	select NET_9P
> +	select NET_9P_VIRTIO
> +	---help---
> +	  Select guest kernel functionality which facilitates booting the
> +	  kernel as a guest in qemu/kvm. This entails basic stuff like

s/qemu/qemu or lkvm

> +	  serial support, kgdb, virtio and other so that you can be able to
> +	  have commodity functionality like serial output from the guest,
> +	  networking, etc.

And seemless host file system integration into guest context. (that is 
what the 9P options are about)

Thanks,

	Ingo
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