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

[tip-bot for Borislav Petkov]

Commit-ID:  7e0320e733eec67e40d2b53e438d9971f079862d
Gitweb:     http://git.kernel.org/tip/7e0320e733eec67e40d2b53e438d9971f079862d
Author:     Borislav Petkov <bp@xxxxxxxxx>
AuthorDate: Fri, 26 Apr 2013 11:51:40 +0200
Committer:  H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Thu, 2 May 2013 10:13:07 -0700

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.

[ hpa: rebased to resolve a merge conflict ]

Originally-by: Pekka Enberg <penberg@xxxxxxxxxx>
Originally-by: Sasha Levin <levinsasha928@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Sasha Levin <levinsasha928@xxxxxxxxx>
Cc: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Link: http://lkml.kernel.org/r/20130426095140.GA15361@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
 arch/x86/Kconfig | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5db2117..f724671f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -649,6 +649,45 @@ 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_TIME_ACCOUNTING
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