kvm-ioctls: foundation for KVM Nested State ioctls

More info: https://docs.kernel.org/virt/kvm/api.html#capabilities-that-can-be-enabled-on-vcpus

Signed-off-by: Philipp Schuster <[email protected]>
On-behalf-of: SAP [email protected]

Author: phip1611

kvm-ioctls/src/cap.rs

@@ -165,4 +165,6 @@ pub enum Cap {
     UserMemory2 = KVM_CAP_USER_MEMORY2,
     GuestMemfd = KVM_CAP_GUEST_MEMFD,
     MemoryAttributes = KVM_CAP_MEMORY_ATTRIBUTES,
+    #[cfg(target_arch = "x86_64")]
+    NestedState = KVM_CAP_NESTED_STATE,
 }

kvm-ioctls/src/kvm_ioctls.rs

@@ -262,6 +262,12 @@ ioctl_iow_nr!(
     kvm_memory_attributes
 );
 
+#[cfg(target_arch = "x86_64")]
+ioctl_iowr_nr!(KVM_GET_NESTED_STATE, KVMIO, 0xbe, kvm_nested_state);
+
+#[cfg(target_arch = "x86_64")]
+ioctl_iow_nr!(KVM_SET_NESTED_STATE, KVMIO, 0xbf, kvm_nested_state);
+
 // Device ioctls.
 
 /* Available with KVM_CAP_DEVICE_CTRL */