[tip:x86/urgent] x86/kconfig: Add a Kconfig shortcut for building working KVM guest kernels

[tip-bot for Borislav Petkov <tipbot@zytor.com>]

Commit-ID:  83aee67833071c7b73a83f7803388f7a9e481908
Gitweb:     http://git.kernel.org/tip/83aee67833071c7b73a83f7803388f7a9e481908
Author:     Borislav Petkov <bp@alien8.de>
AuthorDate: Fri, 26 Apr 2013 11:51:40 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 30 Apr 2013 11:00:11 +0200

x86/kconfig: Add a Kconfig shortcut for building working KVM guest kernels

This is pretty useful for the case where people want to boot the
resulting kernel in qemu/kvm or lkvm. 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.

Patch has been adapted from a version in the external lkvm tree.

Originally-by: Pekka Enberg <penberg@kernel.org>
Originally-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Sasha Levin <levinsasha928@gmail.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Link: http://lkml.kernel.org/r/20130426095140.GA15361@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/Kconfig | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 15b5cef..1d053dc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -633,6 +633,45 @@ 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_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 or lkvm. This entails basic stuff like
+	  serial support, kgdb, virtio and other so that you can be able to
+	  have commodity functionality like serial output from the guest,
+	  networking, seamless host file system integration into guest context
+	  and other useful things.
+
 source "arch/x86/lguest/Kconfig"
 
 config PARAVIRT