[RFC][PATCH v1 05/10] Set the RAM's MemoryRegion::debug_ops for INTEL TD guests

[Yuan Yao]

From: Yuan Yao <yuan.yao@intel.com>

Now only set the RAM's debug_ops for INTEL TD guests, SEV can also
rely on the common part introduced in previous patch or introduce
new debug_ops implementation if it's necessary.

Signed-off-by: Yuan Yao <yuan.yao@intel.com>

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index d5a4345f44..772b19c524 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -60,6 +60,7 @@
 #include "sysemu/xen.h"
 #include "sysemu/reset.h"
 #include "sysemu/runstate.h"
+#include "sysemu/tdx.h"
 #include "kvm/kvm_i386.h"
 #include "hw/xen/xen.h"
 #include "hw/xen/start_info.h"
@@ -992,6 +993,9 @@ void pc_memory_init(PCMachineState *pcms,
 
     /* Init ACPI memory hotplug IO base address */
     pcms->memhp_io_base = ACPI_MEMORY_HOTPLUG_BASE;
+
+    if (tdx_debug_enabled(machine->cgs))
+        kvm_set_memory_region_debug_ops(NULL, *ram_memory);
 }
 
 /*
diff --git a/include/sysemu/tdx.h b/include/sysemu/tdx.h
index 429bb0ff8e..bd0af77c03 100644
--- a/include/sysemu/tdx.h
+++ b/include/sysemu/tdx.h
@@ -16,4 +16,7 @@ void tdx_post_init_vcpu(CPUState *cpu);
 struct TDXCapability;
 struct TDXCapability *tdx_get_capabilities(void);
 
+struct ConfidentialGuestSupport;
+bool tdx_debug_enabled(ConfidentialGuestSupport *cgs);
+
 #endif
diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index c4e5686260..d13d4c8487 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -384,3 +384,18 @@ static void tdx_guest_finalize(Object *obj)
 static void tdx_guest_class_init(ObjectClass *oc, void *data)
 {
 }
+
+bool tdx_debug_enabled(ConfidentialGuestSupport *cgs)
+{
+    TdxGuest *tdx;
+
+    if (!cgs)
+        return false;
+
+    tdx = (TdxGuest *)object_dynamic_cast(OBJECT(cgs),
+                                          TYPE_TDX_GUEST);
+    if (!tdx)
+        return false;
+
+    return tdx->debug;
+}
-- 
2.20.1