[PATCH 1/2] firmware: arm_ffa: Add FFA_FN64_MEM_RECLAIM2 function ID

From: Snehal Koukuntla

Date: Mon Sep 21 2026 - 12:48:27 EST


FF-A v1.3 ALP5 (DEN0140 rev J) introduces the optional FFA_MEM_RECLAIM2
(0xC4000091) ABI, which enables an Owner to reclaim exclusive access to
a subset of pages of a memory region without requiring the Relayer to
maintain intermediate transaction state.

Add the FFA_FN64_MEM_RECLAIM2 function ID definition to arm_ffa.h.

Link: https://support.arm.com/documentation/den0140/j
Signed-off-by: Snehal Koukuntla <snehalreddy@xxxxxxxxxx>
---
include/linux/arm_ffa.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/include/linux/arm_ffa.h b/include/linux/arm_ffa.h
index e71d83ee0aef..c78cfd72832a 100644
--- a/include/linux/arm_ffa.h
+++ b/include/linux/arm_ffa.h
@@ -78,6 +78,7 @@
#define FFA_EL3_INTR_HANDLE FFA_SMC_32(0x8C)
#define FFA_MSG_SEND_DIRECT_REQ2 FFA_SMC_64(0x8D)
#define FFA_MSG_SEND_DIRECT_RESP2 FFA_SMC_64(0x8E)
+#define FFA_FN64_MEM_RECLAIM2 FFA_SMC_64(0x91)

/*
* For some calls it is necessary to use SMC64 to pass or return 64-bit values.
--
2.55.0.1082.g2b9226bbc0-goog