diff --git a/src/ffa_v1_2.rs b/src/ffa_v1_2.rs
new file mode 100644
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+++ b/src/ffa_v1_2.rs
@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: Copyright 2025 Arm Limited and/or its affiliates <open-source-office@arm.com>
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+#![allow(non_camel_case_types)]
+
+use crate::ffa_v1_1;
+use zerocopy_derive::*;
+
+/// Table 6.1: Partition information descriptor
+/// Table 6.2: Partition properties descriptor
+/// The following changes are introduced by FF-A v1.2 to the partition properties field:
+/// - bit\[10:9\]: Has the following encoding if Bits\[5:4\] = b’00. Reserved (MBZ) otherwise.
+///   + bit\[9\] has the following encoding:
+///     * b’0: Cannot receive Direct requests via the FFA_MSG_SEND_DIRECT_REQ2 ABI.
+///     * b’1: Can receive Direct requests via the FFA_MSG_SEND_DIRECT_REQ2 ABI.
+///   + bit\[10\] has the following encoding:
+///     * b’0: Cannot send Direct requests via the FFA_MSG_SEND_DIRECT_REQ2 ABI.
+///     * b’1: Can send Direct requests via the FFA_MSG_SEND_DIRECT_REQ2 ABI.
+/// - bit\[31:11\]: Reserved (MBZ).
+///
+/// This doesn't change the descriptor format so we can just use an alias.
+#[allow(unused)]
+pub(crate) type partition_info_descriptor = ffa_v1_1::partition_info_descriptor;
+
+/// FF-A Memory Management Protocol Table 1.16: Endpoint memory access descriptor
+#[derive(Default, FromBytes, IntoBytes, KnownLayout, Immutable)]
+#[repr(C, packed)]
+pub(crate) struct endpoint_memory_access_descriptor {
+    /// Offset 0, length 4: Memory access permissions descriptor as specified in Table 10.15
+    pub(crate) access_perm_desc: ffa_v1_1::memory_access_permission_descriptor,
+    /// Offset 4, length 4: Offset to the composite memory region descriptor to which the endpoint
+    /// access permissions apply. Offset must be calculated from the base address of the data
+    /// structure this descriptor is included in. An offset value of 0 indicates that the endpoint
+    /// access permissions apply to a memory region description identified by the Handle parameter
+    /// specified in the data structure that includes this one.
+    pub(crate) composite_offset: u32,
+    /// Offset 8, length 16: Implementation defined information
+    pub(crate) impdef_info: [u8; 16],
+    /// Offset 24, length 8: Reserved (MBZ)
+    pub(crate) reserved: u64,
+}