KVM: Support assigning userspace memory to the guest

[linux-2.6] / include / linux / kvm.h

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index d2fd973d81feded004c9508cef7573e37944caa8..971f465e26fa688616dafac4b2a5f15911b59eee 100644 (file)
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -23,6 +23,15 @@ struct kvm_memory_region {
        __u64 memory_size; /* bytes */
 };
 
+/* for KVM_SET_USER_MEMORY_REGION */
+struct kvm_userspace_memory_region {
+       __u32 slot;
+       __u32 flags;
+       __u64 guest_phys_addr;
+       __u64 memory_size; /* bytes */
+       __u64 userspace_addr; /* start of the userspace allocated memory */
+};
+
 /* for kvm_memory_region::flags */
 #define KVM_MEM_LOG_DIRTY_PAGES  1UL
 
@@ -348,6 +357,7 @@ struct kvm_signal_mask {
 #define KVM_CAP_IRQCHIP          0
 #define KVM_CAP_HLT      1
 #define KVM_CAP_MMU_SHADOW_CACHE_CONTROL 2
+#define KVM_CAP_USER_MEMORY 3
 
 /*
  * ioctls for VM fds
@@ -355,6 +365,8 @@ struct kvm_signal_mask {
 #define KVM_SET_MEMORY_REGION     _IOW(KVMIO, 0x40, struct kvm_memory_region)
 #define KVM_SET_NR_MMU_PAGES      _IO(KVMIO, 0x44)
 #define KVM_GET_NR_MMU_PAGES      _IO(KVMIO, 0x45)
+#define KVM_SET_USER_MEMORY_REGION _IOW(KVMIO, 0x46,\
+                                       struct kvm_userspace_memory_region)
 /*
  * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns
  * a vcpu fd.