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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-30 12:56:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-30 12:56:17 -0800
commitb07d41b77e58baa2df2326cec68dde03cb2348c5 (patch)
tree80bf63803e52c4930dd0118046ab3d2f074d529f /Documentation
parent8fa4d8702de3b32854344635667290776d1a754b (diff)
parentb4329db0d7fd5a233866e799ad3bae8639e90c71 (diff)
downloadlinux-b07d41b77e58baa2df2326cec68dde03cb2348c5.tar.gz
Merge branch 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: get rid of kvm_create_vm() unused label warning on s390
  KVM: powerpc: Fix mtsrin in book3s_64 mmu
  KVM: ia64: fix build breakage due to host spinlock change
  KVM: x86: Extend KVM_SET_VCPU_EVENTS with selective updates
  KVM: LAPIC: make sure IRR bitmap is scanned after vm load
  KVM: Fix possible circular locking in kvm_vm_ioctl_assign_device()
  KVM: MMU: remove prefault from invlpg handler
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kvm/api.txt10
1 files changed, 9 insertions, 1 deletions
diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt
index e1a114161027..2811e452f756 100644
--- a/Documentation/kvm/api.txt
+++ b/Documentation/kvm/api.txt
@@ -685,7 +685,7 @@ struct kvm_vcpu_events {
 		__u8 pad;
 	} nmi;
 	__u32 sipi_vector;
-	__u32 flags;   /* must be zero */
+	__u32 flags;
 };
 
 4.30 KVM_SET_VCPU_EVENTS
@@ -701,6 +701,14 @@ vcpu.
 
 See KVM_GET_VCPU_EVENTS for the data structure.
 
+Fields that may be modified asynchronously by running VCPUs can be excluded
+from the update. These fields are nmi.pending and sipi_vector. Keep the
+corresponding bits in the flags field cleared to suppress overwriting the
+current in-kernel state. The bits are:
+
+KVM_VCPUEVENT_VALID_NMI_PENDING - transfer nmi.pending to the kernel
+KVM_VCPUEVENT_VALID_SIPI_VECTOR - transfer sipi_vector
+
 
 5. The kvm_run structure