From 721eecbf4fe995ca94a9edec0c9843b1cc0eaaf3 Mon Sep 17 00:00:00 2001 From: Gregory Haskins Date: Wed, 20 May 2009 10:30:49 -0400 Subject: KVM: irqfd KVM provides a complete virtual system environment for guests, including support for injecting interrupts modeled after the real exception/interrupt facilities present on the native platform (such as the IDT on x86). Virtual interrupts can come from a variety of sources (emulated devices, pass-through devices, etc) but all must be injected to the guest via the KVM infrastructure. This patch adds a new mechanism to inject a specific interrupt to a guest using a decoupled eventfd mechnanism: Any legal signal on the irqfd (using eventfd semantics from either userspace or kernel) will translate into an injected interrupt in the guest at the next available interrupt window. Signed-off-by: Gregory Haskins Signed-off-by: Avi Kivity --- arch/x86/kvm/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86/kvm/Kconfig') diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 939b1cb9c5b..8cd2a4efe23 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -26,6 +26,7 @@ config KVM select MMU_NOTIFIER select ANON_INODES select HAVE_KVM_IRQCHIP + select HAVE_KVM_EVENTFD ---help--- Support hosting fully virtualized guest machines using hardware virtualization extensions. You will need a fairly recent -- cgit v1.2.3