dm: Add vhm ioeventfd and irqfd interfaces

ioeventfd and irqfd support for vhm was introduced in kernel vhm module.
We provide the interfaces of them for DM users.

Tracked-On: #1329
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>

Author: Shuo Liu

devicemodel/core/vmmapi.c

@@ -657,3 +657,15 @@ vm_intr_monitor(struct vmctx *ctx, void *intr_buf)
 {
 	return ioctl(ctx->fd, IC_VM_INTR_MONITOR, intr_buf);
 }
+
+int
+vm_ioeventfd(struct vmctx *ctx, struct acrn_ioeventfd *args)
+{
+	return ioctl(ctx->fd, IC_EVENT_IOEVENTFD, args);
+}
+
+int
+vm_irqfd(struct vmctx *ctx, struct acrn_irqfd *args)
+{
+	return ioctl(ctx->fd, IC_EVENT_IRQFD, args);
+}

devicemodel/include/public/vhm_ioctl_defs.h

@@ -112,6 +112,11 @@
 #define VM_MEMMAP_SYSMEM       0
 #define VM_MMIO         1
 
+/* VHM eventfd */
+#define IC_ID_EVENT_BASE		0x70UL
+#define IC_EVENT_IOEVENTFD		_IC_ID(IC_ID, IC_ID_EVENT_BASE + 0x00)
+#define IC_EVENT_IRQFD			_IC_ID(IC_ID, IC_ID_EVENT_BASE + 0x01)
+
 /**
  * struct vm_memmap - EPT memory mapping info for guest
  */
@@ -204,4 +209,22 @@ struct api_version {
 	uint32_t minor_version;
 };
 
+#define ACRN_IOEVENTFD_FLAG_PIO		0x01
+#define ACRN_IOEVENTFD_FLAG_DATAMATCH	0x02
+#define ACRN_IOEVENTFD_FLAG_DEASSIGN	0x04
+struct acrn_ioeventfd {
+       int32_t fd;
+       uint32_t flags;
+       uint64_t addr;
+       uint32_t len;
+       uint32_t reserved;
+       uint64_t data;
+};
+
+#define ACRN_IRQFD_FLAG_DEASSIGN	0x01
+struct acrn_irqfd {
+       int32_t fd;
+       uint32_t flags;
+       struct acrn_msi_entry msi;
+};
 #endif /* VHM_IOCTL_DEFS_H */

devicemodel/include/vmmapi.h

@@ -155,4 +155,7 @@ int	vm_get_cpu_state(struct vmctx *ctx, void *state_buf);
 int	vm_intr_monitor(struct vmctx *ctx, void *intr_buf);
 void	vm_stop_watchdog(struct vmctx *ctx);
 void	vm_reset_watchdog(struct vmctx *ctx);
+
+int	vm_ioeventfd(struct vmctx *ctx, struct acrn_ioeventfd *args);
+int	vm_irqfd(struct vmctx *ctx, struct acrn_irqfd *args);
 #endif	/* _VMMAPI_H_ */