hv: remove pr_dbg between stac/clac

As the pr_dbg will access sbuf which will call stac/clac inside, so can
not put pr_dbg between stac/clac, it will case Page Fault.
acrn_print_request is a debug feature, and it calls pr_dbg. when the
loglevel is set to 6, there will be Page Fault.
So, remove the caller for acrn_print_request and mask the function as
unused, reserved for debug.

Tracked-On: #3648
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Reviewed-by: Yonghua Huang <yonghua.huang@intel.com>

Author: conghuic23

hypervisor/dm/io_req.c

@@ -18,7 +18,7 @@ static uint32_t acrn_vhm_notification_vector = VECTOR_HYPERVISOR_CALLBACK_VHM;
 #define MMIO_DEFAULT_VALUE_SIZE_8	(0xFFFFFFFFFFFFFFFFUL)
 
 #if defined(HV_DEBUG)
-static void acrn_print_request(uint16_t vcpu_id, const struct vhm_request *req)
+__unused static void acrn_print_request(uint16_t vcpu_id, const struct vhm_request *req)
 {
 	switch (req->type) {
 	case REQ_MMIO:
@@ -122,12 +122,6 @@ int32_t acrn_insert_request(struct acrn_vcpu *vcpu, const struct io_request *io_
 		 */
 		set_vhm_req_state(vcpu->vm, vcpu->vcpu_id, REQ_STATE_PENDING);
 
-#if defined(HV_DEBUG)
-		stac();
-		acrn_print_request(vcpu->vcpu_id, vhm_req);
-		clac();
-#endif
-
 		/* signal VHM */
 		arch_fire_vhm_interrupt();