x86: KVM guest: add basic paravirt support
Add basic KVM paravirt support. Avoid vm-exits on IO delays.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 40cedc2..e5790fe 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -384,6 +384,14 @@
provides the guest with timing infrastructure such as time of day, and
system time
+config KVM_GUEST
+ bool "KVM Guest support"
+ select PARAVIRT
+ depends on !(X86_VISWS || X86_VOYAGER)
+ help
+ This option enables various optimizations for running under the KVM
+ hypervisor.
+
source "arch/x86/lguest/Kconfig"
config PARAVIRT