feat(indirect message): add RX_ACQUIRE ABI
In FF-A v1.1 both Hypervisor and SPMC are producers of VM's RX buffer,
and they could contend for the same buffer.
SPMC owns VM's RX buffer after it's mapped in its translation regime.
This ABI should be used by the Hypervisor to get the ownership of a
VM's RX buffer.
This patch covers two uses cases: indirect messages (through v1.1
FFA_MSG_SEND2) and FFA_PARTITION_INFO_GET. Memory sharing interfaces
should make use of RX_ACQUIRE when they will be updated to FF-A v1.1.
Change-Id: Id33cbc7e500adf55316783a48e7acfcb52b9e305
Signed-off-by: Federico Recanati <federico.recanati@arm.com>
diff --git a/inc/hf/api.h b/inc/hf/api.h
index 371fb3e..50b95fa 100644
--- a/inc/hf/api.h
+++ b/inc/hf/api.h
@@ -48,6 +48,8 @@
struct ffa_value api_ffa_msg_recv(bool block, struct vcpu *current,
struct vcpu **next);
struct ffa_value api_ffa_rx_release(struct vcpu *current, struct vcpu **next);
+struct ffa_value api_ffa_rx_acquire(ffa_vm_id_t receiver_id,
+ struct vcpu *current);
struct ffa_value api_vm_configure_pages(
struct mm_stage1_locked mm_stage1_locked, struct vm_locked vm_locked,
ipaddr_t send, ipaddr_t recv, uint32_t page_count,
diff --git a/inc/hf/arch/plat/ffa.h b/inc/hf/arch/plat/ffa.h
index 162cfff..d4a163e 100644
--- a/inc/hf/arch/plat/ffa.h
+++ b/inc/hf/arch/plat/ffa.h
@@ -74,6 +74,9 @@
struct ffa_value args,
struct ffa_value *ret);
+bool plat_ffa_acquire_receiver_rx(struct vm_locked to_locked,
+ struct ffa_value *ret);
+
bool plat_ffa_is_indirect_msg_supported(struct vm_locked sender_locked,
struct vm_locked receiver_locked);