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authorMarcelo Tosatti <mtosatti@redhat.com>2008-12-30 15:55:06 -0200
committerAvi Kivity <avi@redhat.com>2009-03-24 11:02:55 +0200
commit52d939a0bf44081bc9f69b4fbdc9e7f416df27c7 (patch)
tree27a14385847f5585cdccaf5e5c18074595642970 /include
parent61a6bd672bda3b9468bf5895c1be085c4e481138 (diff)
KVM: PIT: provide an option to disable interrupt reinjection
Certain clocks (such as TSC) in older 2.6 guests overaccount for lost ticks, causing severe time drift. Interrupt reinjection magnifies the problem. Provide an option to disable it. [avi: allow room for expansion in case we want to disable reinjection of other timers] Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/kvm.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 11e3e6197c8..ae7a12c7742 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -396,6 +396,9 @@ struct kvm_trace_rec {
#if defined(CONFIG_X86)
#define KVM_CAP_SET_GUEST_DEBUG 23
#endif
+#if defined(CONFIG_X86)
+#define KVM_CAP_REINJECT_CONTROL 24
+#endif
/*
* ioctls for VM fds
@@ -429,6 +432,7 @@ struct kvm_trace_rec {
struct kvm_assigned_pci_dev)
#define KVM_ASSIGN_IRQ _IOR(KVMIO, 0x70, \
struct kvm_assigned_irq)
+#define KVM_REINJECT_CONTROL _IO(KVMIO, 0x71)
/*
* ioctls for vcpu fds