Implement API to inject virtual interrupts into VMs.
This doesn't yet work properly in multiple-PE configurations, and doesn't have
any concept of priorities.
Bug: 117270899
Change-Id: Id62c59d78d0604b934aeca75ea459248db660488
diff --git a/inc/vmapi/hf/call.h b/inc/vmapi/hf/call.h
index 102fd6c..7de8160 100644
--- a/inc/vmapi/hf/call.h
+++ b/inc/vmapi/hf/call.h
@@ -16,6 +16,8 @@
#pragma once
+#include "hf/arch/cpu.h"
+
#include "hf/abi.h"
#include "hf/types.h"
@@ -23,13 +25,16 @@
/* clang-format off */
/* TODO: Define constants below according to spec. */
-#define HF_VCPU_RUN 0xff00
-#define HF_VM_GET_COUNT 0xff01
-#define HF_VCPU_GET_COUNT 0xff02
-#define HF_VM_CONFIGURE 0xff03
-#define HF_MAILBOX_SEND 0xff04
-#define HF_MAILBOX_RECEIVE 0xff05
-#define HF_MAILBOX_CLEAR 0xff06
+#define HF_VCPU_RUN 0xff00
+#define HF_VM_GET_COUNT 0xff01
+#define HF_VCPU_GET_COUNT 0xff02
+#define HF_VM_CONFIGURE 0xff03
+#define HF_MAILBOX_SEND 0xff04
+#define HF_MAILBOX_RECEIVE 0xff05
+#define HF_MAILBOX_CLEAR 0xff06
+#define HF_ENABLE_INTERRUPT 0xff07
+#define HF_GET_AND_ACKNOWLEDGE_INTERRUPT 0xff08
+#define HF_INJECT_INTERRUPT 0xff09
/** The amount of data that can be sent to a mailbox. */
#define HF_MAILBOX_SIZE 4096
@@ -118,3 +123,39 @@
{
return hf_call(HF_MAILBOX_CLEAR, 0, 0, 0);
}
+
+/**
+ * Enables or disables a given interrupt ID.
+ *
+ * Returns 0 on success, or -1 if the intid is invalid.
+ */
+static inline uint64_t hf_enable_interrupt(uint32_t intid, bool enable)
+{
+ return hf_call(HF_ENABLE_INTERRUPT, intid, enable, 0);
+}
+
+/**
+ * Gets the ID of the pending interrupt (if any) and acknowledge it.
+ *
+ * Returns HF_INVALID_INTID if there are no pending interrupts.
+ */
+static inline uint32_t hf_get_and_acknowledge_interrupt()
+{
+ return hf_call(HF_GET_AND_ACKNOWLEDGE_INTERRUPT, 0, 0, 0);
+}
+
+/**
+ * Injects a virtual interrupt of the given ID into the given target vCPU.
+ * This doesn't cause the vCPU to actually be run immediately; it will be taken
+ * when the vCPU is next run, which is up to the scheduler.
+ *
+ * Returns 0 on success, or -1 if the target VM or vCPU doesn't exist or
+ * the interrupt ID is invalid.
+ */
+static inline int64_t hf_inject_interrupt(uint32_t target_vm_id,
+ uint32_t target_vcpu_idx,
+ uint32_t intid)
+{
+ return hf_call(HF_INJECT_INTERRUPT, target_vm_id, target_vcpu_idx,
+ intid);
+}
diff --git a/inc/vmapi/hf/types.h b/inc/vmapi/hf/types.h
index 45aa257..697a990 100644
--- a/inc/vmapi/hf/types.h
+++ b/inc/vmapi/hf/types.h
@@ -39,3 +39,9 @@
/* Invalid values for fields to indicate absence or errors. */
#define HF_INVALID_VM_ID 0xffffffff
#define HF_INVALID_VCPU 0xffff
+
+/** The number of virtual interrupt IDs which are supported. */
+#define HF_NUM_INTIDS 64
+
+/** Interrupt ID returned when there is no interrupt pending. */
+#define HF_INVALID_INTID 0xffffffff