[XEN PATCH] xen/arm: ffa: fix bind/unbind notification

[Jens Wiklander <jens.wiklander@xxxxxxxxxx>]

The notification bitmask is in passed in the FF-A ABI in two 32-bit
registers w3 and w4. The lower 32-bits should go in w3 and the higher in
w4. These two registers has unfortunately been swapped for
FFA_NOTIFICATION_BIND and FFA_NOTIFICATION_UNBIND in the FF-A mediator.
So fix that by using the correct registers.

Fixes: b490f470f58d ("xen/arm: ffa: support notification")
Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
---
 xen/arch/arm/tee/ffa_notif.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/tee/ffa_notif.c b/xen/arch/arm/tee/ffa_notif.c
index 21b9e78f6399..00efaf8f7353 100644
--- a/xen/arch/arm/tee/ffa_notif.c
+++ b/xen/arch/arm/tee/ffa_notif.c
@@ -40,8 +40,8 @@ int ffa_handle_notification_bind(struct cpu_user_regs *regs)
      * We only support notifications from SP so no need to check the sender
      * endpoint ID, the SPMC will take care of that for us.
      */
-    return ffa_simple_call(FFA_NOTIFICATION_BIND, src_dst, flags, bitmap_hi,
-                           bitmap_lo);
+    return ffa_simple_call(FFA_NOTIFICATION_BIND, src_dst, flags, bitmap_lo,
+                           bitmap_hi);
 }
 
 int ffa_handle_notification_unbind(struct cpu_user_regs *regs)
@@ -61,8 +61,8 @@ int ffa_handle_notification_unbind(struct cpu_user_regs *regs)
      * We only support notifications from SP so no need to check the
      * destination endpoint ID, the SPMC will take care of that for us.
      */
-    return  ffa_simple_call(FFA_NOTIFICATION_UNBIND, src_dst, 0, bitmap_hi,
-                            bitmap_lo);
+    return  ffa_simple_call(FFA_NOTIFICATION_UNBIND, src_dst, 0, bitmap_lo,
+                            bitmap_hi);
 }
 
 void ffa_handle_notification_info_get(struct cpu_user_regs *regs)
-- 
2.43.0