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authorGregory Haskins <ghaskins@novell.com>2009-05-20 18:30:49 +0400
committerAvi Kivity <avi@redhat.com>2009-09-10 09:32:41 +0400
commit721eecbf4fe995ca94a9edec0c9843b1cc0eaaf3 (patch)
treec759fe98a4ea5e2e2a7694e4b44a558407077290 /arch/x86/kvm/Kconfig
parent0ba12d10817a8db1fd7d96d3283ec6c0b294aeab (diff)
downloadlinux-721eecbf4fe995ca94a9edec0c9843b1cc0eaaf3.tar.xz
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 <ghaskins@novell.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/Kconfig')
-rw-r--r--arch/x86/kvm/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 939b1cb9c5b3..8cd2a4efe238 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