From f1f9a52153ccfa185181a4ec63287d2de4662504 Mon Sep 17 00:00:00 2001
From: Stefan Butz <mail@butz.st>
Date: Fri, 10 Jul 2026 15:08:25 +0200
Subject: [PATCH] Add support for entropy device

---
 src/entropy.rs  | 19 +++++++++++++++++++
 src/features.rs | 13 +++++++++++++
 src/lib.rs      |  3 ++-
 3 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 src/entropy.rs

diff --git a/src/entropy.rs b/src/entropy.rs
new file mode 100644
index 0000000..e782ecc
--- /dev/null
+++ b/src/entropy.rs
@@ -0,0 +1,19 @@
+use volatile_macro::VolatileFieldAccess;
+
+pub use super::features::entropy::F;
+
+/// Entropy Device Configuration Layout
+///
+/// Use [`ConfigVolatileFieldAccess`] to work with this struct.
+#[doc(alias = "virtio_entropy_config")]
+#[cfg_attr(
+    feature = "zerocopy",
+    derive(
+        zerocopy_derive::KnownLayout,
+        zerocopy_derive::Immutable,
+        zerocopy_derive::FromBytes,
+    )
+)]
+#[derive(VolatileFieldAccess)]
+#[repr(C)]
+pub struct Config {}
diff --git a/src/features.rs b/src/features.rs
index 9443069..5dca303 100644
--- a/src/features.rs
+++ b/src/features.rs
@@ -369,6 +369,19 @@ pub mod console {
     impl crate::FeatureBits for F {}
 }
 
+pub mod entropy {
+    use crate::le128;
+
+    feature_bits! {
+        /// Entropy Device Feature Bits
+        #[doc(alias = "VIRTIO_ENTROPY_F")]
+        pub struct F: le128 {
+        }
+    }
+
+    impl crate::FeatureBits for F {}
+}
+
 pub mod net {
     use crate::le128;
 
diff --git a/src/lib.rs b/src/lib.rs
index 03bf587..c8afe80 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -66,7 +66,7 @@
 //! | Network Device                    | ✅        | [`net`]     |
 //! | Block Device                      | ❌        |             |
 //! | Console Device                    | ✅        | [`console`] |
-//! | Entropy Device                    | ❌        |             |
+//! | Entropy Device                    | ✅        | [`entropy`] |
 //! | Traditional Memory Balloon Device | ✅        | [`balloon`] |
 //! | SCSI Host Device                  | ❌        |             |
 //! | GPU Device                        | ❌        |             |
@@ -98,6 +98,7 @@ pub mod balloon;
 pub mod console;
 #[cfg(any(feature = "mmio", feature = "pci"))]
 mod driver_notifications;
+pub mod entropy;
 mod features;
 pub mod fs;
 #[cfg(feature = "mmio")]