From 341420292d6cd67eb128be6c8b64613b03c8dca2 Mon Sep 17 00:00:00 2001
From: Sebastien Boeuf <sboeuf@meta.com>
Date: Tue, 15 Sep 2026 04:17:12 -0700
Subject: [PATCH] iommufd-ioctls: Extend AttachHwpt with detach_hwpt

Extend the existing trait to allow page table to be detached for the
associated device.

Assisted-by: Claude:Opus-5
Signed-off-by: Sebastien Boeuf <sboeuf@meta.com>
---
 iommufd-ioctls/CHANGELOG.md          | 10 ++++++++++
 iommufd-ioctls/Cargo.toml            |  2 +-
 iommufd-ioctls/src/iommufd_ioctls.rs |  2 ++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/iommufd-ioctls/CHANGELOG.md b/iommufd-ioctls/CHANGELOG.md
index d1f8efc..cd2384e 100644
--- a/iommufd-ioctls/CHANGELOG.md
+++ b/iommufd-ioctls/CHANGELOG.md
@@ -6,6 +6,16 @@
 
 ## Fixed
 
+# [v0.3.1]
+
+## Changed
+
+- Extended `AttachHwpt` trait with method `detach_hwpt()` to allow the page table to be detached from the associated device.
+
+## Added
+
+## Fixed
+
 # [v0.3.0]
 
 ## Changed
diff --git a/iommufd-ioctls/Cargo.toml b/iommufd-ioctls/Cargo.toml
index 9bc6141..5718043 100644
--- a/iommufd-ioctls/Cargo.toml
+++ b/iommufd-ioctls/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "iommufd-ioctls"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["The Cloud Hypervisor Authors"]
 license = "Apache-2.0"
 description = "Safe wrappers over IOMMUFD uAPIs"
diff --git a/iommufd-ioctls/src/iommufd_ioctls.rs b/iommufd-ioctls/src/iommufd_ioctls.rs
index 4d6a28c..5a1fa02 100644
--- a/iommufd-ioctls/src/iommufd_ioctls.rs
+++ b/iommufd-ioctls/src/iommufd_ioctls.rs
@@ -601,6 +601,8 @@ pub enum IommufdHwptData {
 pub trait AttachHwpt: Send + Sync {
     /// Attach the device to the HW page table.
     fn attach_hwpt(&self, pt_id: u32) -> std::io::Result<()>;
+    /// Detach the device from the HW page table.
+    fn detach_hwpt(&self) -> std::io::Result<()>;
 }
 
 pub struct IommufdVDevice {