[RFC,v2,13/21] i386/kvm: Set memory to default private for KVM_X86_SW_PROTECTED_VM

Commit Message

Xiaoyao Li Sept. 14, 2023, 3:51 a.m. UTC

Register a memory listener for KVM_X86_SW_PROVTED_VM. It set RAM to
private by default.

Signed-off-by: Xiaoyao Li <[e-mail]>
---
 include/exec/memory.h             |  1 +
 target/i386/kvm/sw-protected-vm.c | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

Patch

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 2c738b5dc420..a2602b783a38 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -820,6 +820,7 @@  struct IOMMUMemoryRegion {
 #define MEMORY_LISTENER_PRIORITY_MIN            0
 #define MEMORY_LISTENER_PRIORITY_ACCEL          10
 #define MEMORY_LISTENER_PRIORITY_DEV_BACKEND    10
+#define MEMORY_LISTENER_PRIORITY_ACCEL_HIGH     20
 
 /**
  * struct MemoryListener: callbacks structure for updates to the physical memory map
diff --git a/target/i386/kvm/sw-protected-vm.c b/target/i386/kvm/sw-protected-vm.c
index 3cfcc89202a6..f47ac383e1dd 100644
--- a/target/i386/kvm/sw-protected-vm.c
+++ b/target/i386/kvm/sw-protected-vm.c
@@ -12,14 +12,32 @@ 
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qom/object_interfaces.h"
+#include "exec/address-spaces.h"
+#include "sysemu/kvm.h"
 
 #include "hw/i386/x86.h"
 #include "sw-protected-vm.h"
 
+static void kvm_x86_sw_protected_vm_region_add(MemoryListener *listenr,
+                                               MemoryRegionSection *section)
+{
+    memory_region_set_default_private(section->mr);
+}
+
+static MemoryListener kvm_x86_sw_protected_vm_memory_listener = {
+    .name = "kvm_x86_sw_protected_vm_memory_listener",
+    .region_add = kvm_x86_sw_protected_vm_region_add,
+    /* Higher than KVM memory listener = 10. */
+    .priority = MEMORY_LISTENER_PRIORITY_ACCEL_HIGH,
+};
+
 int sw_protected_vm_kvm_init(MachineState *ms, Error **errp)
 {
     SwProtectedVm *spvm = SW_PROTECTED_VM(OBJECT(ms->cgs));
 
+    memory_listener_register(&kvm_x86_sw_protected_vm_memory_listener,
+                             &address_space_memory);
+
     spvm->parent_obj.ready = true;
     return 0;
 }