[PATCH -v2.1] x86: Add a Kconfig shortcut for kvm guest kernel

[Borislav Petkov]

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.

Cc: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Originally-by: Pekka Enberg <penberg@xxxxxxxxxx>
Originally-by: Sasha Levin <levinsasha928@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
---
 arch/x86/Kconfig | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5651374d179f..432478a7b814 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -680,6 +680,45 @@ 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
-- 
1.8.2.135.g7b592fa

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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