hv: debug: Add hv console callback to VM-exit event

In some scenarios (e.g., nested) where lapic-pt is enabled for a vcpu
running on a pcpu hosting console timer, the hv console will be
inaccessible.

This patch adds the console callback to every VM-exit event so that the
console can still be somewhat functional under such circumstance.

Since this is VM-exit driven, the VM-exit/second can be low in certain
cases (e.g., idle or running stress workload). In extreme cases where
the guest panics/hangs, there will be no VM-exits at all.

In most cases, the shell is laggy but functional (probably enough for
debugging purpose).

Tracked-On: #6312
Signed-off-by: Yifan Liu <yifan1.liu@intel.com>

hypervisor/arch/x86/guest/vmexit.c

@@ -22,6 +22,7 @@
 #include <asm/guest/vcpuid.h>
 #include <trace.h>
 #include <asm/rtcm.h>
+#include <debug/console.h>
 
 /*
  * According to "SDM APPENDIX C VMX BASIC EXIT REASONS",
@@ -292,6 +293,8 @@ int32_t vmexit_handler(struct acrn_vcpu *vcpu)
 		}
 	}
 
+	console_vmexit_callback(vcpu);
+
 	return ret;
 }