diff --git a/crates/sel4-capdl-initializer/core/src/lib.rs b/crates/sel4-capdl-initializer/core/src/lib.rs
index dfc3f0566..ec8553a19 100644
--- a/crates/sel4-capdl-initializer/core/src/lib.rs
+++ b/crates/sel4-capdl-initializer/core/src/lib.rs
@@ -326,6 +326,19 @@ impl<'a, N: ObjectName, D: Content, M: GetEmbeddedFrame, B: BorrowMut<[PerObject
             }
         }
 
+        {
+            let ioports = self
+                .spec()
+                .filter_objects::<&object::IOPorts>()
+                .map(|(obj_id, obj)| (obj_id, obj.start_port, obj.end_port));
+
+            for (obj_id, start_port, end_port) in ioports {
+                let slot = self.cslot_alloc_or_panic();
+                init_thread::slot::IO_PORT_CONTROL.cap().ioport_control_issue(start_port, end_port, &cslot_to_relative_cptr(slot))?;
+                self.set_orig_cslot(obj_id, slot);
+            }
+        }
+
         // Create IrqHandler caps
         {
             for IrqEntry { irq, handler } in self.spec().irqs.iter() {
diff --git a/crates/sel4-capdl-initializer/types/src/spec.rs b/crates/sel4-capdl-initializer/types/src/spec.rs
index b140133d1..6bfba1654 100644
--- a/crates/sel4-capdl-initializer/types/src/spec.rs
+++ b/crates/sel4-capdl-initializer/types/src/spec.rs
@@ -81,6 +81,7 @@ pub enum Object<'a, D, M> {
     ArmIrq(object::ArmIrq<'a>),
     IrqMsi(object::IrqMsi<'a>),
     IrqIOApic(object::IrqIOApic<'a>),
+    IOPorts(object::IOPorts),
     SchedContext(object::SchedContext),
     Reply,
 }
@@ -111,6 +112,7 @@ pub enum Cap {
     ArmIrqHandler(cap::ArmIrqHandler),
     IrqMsiHandler(cap::IrqMsiHandler),
     IrqIOApicHandler(cap::IrqIOApicHandler),
+    IOPorts(cap::IOPorts),
     SchedContext(cap::SchedContext),
     Reply(cap::Reply),
 }
@@ -131,6 +133,7 @@ impl Cap {
             Cap::ArmIrqHandler(cap) => cap.object,
             Cap::IrqMsiHandler(cap) => cap.object,
             Cap::IrqIOApicHandler(cap) => cap.object,
+            Cap::IOPorts(cap) => cap.object,
             Cap::SchedContext(cap) => cap.object,
             Cap::Reply(cap) => cap.object,
         }
@@ -262,6 +265,13 @@ pub mod object {
         pub polarity: Word,
     }
 
+    #[derive(Debug, Clone, Eq, PartialEq, IsObject)]
+    #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+    pub struct IOPorts {
+        pub start_port: Word,
+        pub end_port: Word,
+    }
+
     #[derive(Debug, Clone, Eq, PartialEq, IsObject)]
     #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
     pub struct SchedContext {
@@ -372,6 +382,12 @@ pub mod cap {
         pub object: ObjectId,
     }
 
+    #[derive(Debug, Clone, Eq, PartialEq, IsCap)]
+    #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+    pub struct IOPorts {
+        pub object: ObjectId,
+    }
+
     #[derive(Debug, Clone, Eq, PartialEq, IsCap)]
     #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
     pub struct SchedContext {
diff --git a/crates/sel4-capdl-initializer/types/src/traverse.rs b/crates/sel4-capdl-initializer/types/src/traverse.rs
index 748c05e81..ef0735258 100644
--- a/crates/sel4-capdl-initializer/types/src/traverse.rs
+++ b/crates/sel4-capdl-initializer/types/src/traverse.rs
@@ -42,6 +42,7 @@ impl<'a, N, D, M> Spec<'a, N, D, M> {
                             Object::ArmIrq(obj) => Object::ArmIrq(obj.clone()),
                             Object::IrqMsi(obj) => Object::IrqMsi(obj.clone()),
                             Object::IrqIOApic(obj) => Object::IrqIOApic(obj.clone()),
+                            Object::IOPorts(obj) => Object::IOPorts(obj.clone()),
                             Object::SchedContext(obj) => Object::SchedContext(obj.clone()),
                             Object::Reply => Object::Reply,
                         },
diff --git a/crates/sel4/src/arch/x86/arch/x64/invocations.rs b/crates/sel4/src/arch/x86/arch/x64/invocations.rs
index 0b9aa7fd4..5e881dfeb 100644
--- a/crates/sel4/src/arch/x86/arch/x64/invocations.rs
+++ b/crates/sel4/src/arch/x86/arch/x64/invocations.rs
@@ -144,6 +144,22 @@ impl<C: InvocationContext> IrqControl<C> {
     }
 }
 
+impl<C: InvocationContext> IOPortControl<C> {
+    /// Corresponds to `seL4_X86_IOPortControl_Issue`.
+    pub fn ioport_control_issue(self, first_port: Word, last_port: Word, dst: &AbsoluteCPtr) -> Result<()> {
+        Error::wrap(self.invoke(|cptr, ipc_buffer| {
+            ipc_buffer.inner_mut().seL4_X86_IOPortControl_Issue(
+                cptr.bits(),
+                first_port,
+                last_port,
+                dst.root().bits(),
+                dst.path().bits(),
+                dst.path().depth_for_kernel(),
+            )
+        }))
+    }
+}
+
 impl<C: InvocationContext> AsidControl<C> {
     /// Corresponds to `seL4_X86_ASIDControl_MakePool`.
     pub fn asid_control_make_pool(self, untyped: Untyped, dst: &AbsoluteCPtr) -> Result<()> {
diff --git a/crates/sel4/src/cptr.rs b/crates/sel4/src/cptr.rs
index af3214a12..43229e1be 100644
--- a/crates/sel4/src/cptr.rs
+++ b/crates/sel4/src/cptr.rs
@@ -253,6 +253,15 @@ pub mod cap_type {
             }
         }
     }
+
+    sel4_cfg_if! {
+        if #[sel4_cfg(ARCH_X86_64)] {
+            declare_cap_type! {
+                /// Corresponds to `seL4_X86_IOPortControl`.
+                IOPortControl
+            }
+        }
+    }
 }
 
 use cap::*;
@@ -292,6 +301,12 @@ pub mod cap {
             declare_cap_alias!(SchedControl);
         }
     }
+
+    sel4_cfg_if! {
+        if #[sel4_cfg(ARCH_X86_64)] {
+            declare_cap_alias!(IOPortControl);
+        }
+    }
 }
 
 impl<T: CapType, C> Cap<T, C> {
diff --git a/crates/sel4/src/init_thread.rs b/crates/sel4/src/init_thread.rs
index 36c3e9d0e..419dc5b42 100644
--- a/crates/sel4/src/init_thread.rs
+++ b/crates/sel4/src/init_thread.rs
@@ -134,8 +134,7 @@ pub mod slot {
         (IRQ_CONTROL, IrqControl, seL4_CapIRQControl),
         (ASID_CONTROL, AsidControl, seL4_CapASIDControl),
         (ASID_POOL, AsidPool, seL4_CapInitThreadASIDPool),
-        #[cfg(any())] // TODO
-        (IO_PORT_CONTROL, Null, seL4_CapIOPortControl),
+        (IO_PORT_CONTROL, IOPortControl, seL4_CapIOPortControl),
         #[cfg(any())] // TODO
         (IO_SPACE, Null, seL4_CapIOSpace),
         (BOOT_INFO_FRAME, Granule, seL4_CapBootInfoFrame),