KVM: Allow userspace to process hypercalls which have no kernel handler

This is useful for paravirtualized graphics devices, for example.

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index c93cf53953af..9151ebfa22e9 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -11,7 +11,7 @@
 #include <asm/types.h>
 #include <linux/ioctl.h>
 
-#define KVM_API_VERSION 6
+#define KVM_API_VERSION 7
 
 /*
  * Architectural interrupt line count, and the size of the bitmap needed
@@ -41,6 +41,7 @@ enum kvm_exit_reason {
         KVM_EXIT_UNKNOWN          = 0,
         KVM_EXIT_EXCEPTION        = 1,
         KVM_EXIT_IO               = 2,
+        KVM_EXIT_HYPERCALL        = 3,
         KVM_EXIT_DEBUG            = 4,
         KVM_EXIT_HLT              = 5,
         KVM_EXIT_MMIO             = 6,
@@ -103,6 +104,13 @@ struct kvm_run {
                         __u32 len;
                         __u8  is_write;
                 } mmio;
+                /* KVM_EXIT_HYPERCALL */
+                struct {
+                        __u64 args[6];
+                        __u64 ret;
+                        __u32 longmode;
+                        __u32 pad;
+                } hypercall;
         };
 };