feat(ipi): introduce IPI paravirtualised interface
Interprocessor Interrupts (IPIs) allow an SP to send an interrupt to
itself on another CPU. This patch starts the implementation of this
feature and enables it for the case where the SP is in the RUNNING
state on the target_vcpu.
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
Change-Id: Idd0e1a5863730ae0f169bd0f56ac3abcd2916870
diff --git a/inc/vmapi/hf/call.h b/inc/vmapi/hf/call.h
index 52c2cef..5fceae6 100644
--- a/inc/vmapi/hf/call.h
+++ b/inc/vmapi/hf/call.h
@@ -407,6 +407,14 @@
(uint32_t)target_cpu_index);
}
+/**
+ * Trigger an IPI to target vcpu.
+ */
+static inline int64_t hf_interrupt_send_ipi(ffa_vcpu_index_t target_vcpu_id)
+{
+ return hf_call(HF_INTERRUPT_SEND_IPI, (uint32_t)target_vcpu_id, 0, 0);
+}
+
/** Obtains the Hafnium's version of the implemented FF-A specification. */
static inline enum ffa_version ffa_version(enum ffa_version requested_version)
{