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-rw-r--r--hw/arm/virt.c1
-rw-r--r--hw/core/machine.c5
-rw-r--r--hw/i386/pc_piix.c1
-rw-r--r--hw/i386/pc_q35.c1
4 files changed, 7 insertions, 1 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index aad557be1a..175023897a 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -3537,6 +3537,7 @@ DEFINE_VIRT_MACHINE_AS_LATEST(10, 2)
 static void virt_machine_10_1_options(MachineClass *mc)
 {
     virt_machine_10_2_options(mc);
+    mc->smbios_memory_device_size = 2047 * TiB;
     compat_props_add(mc->compat_props, hw_compat_10_1, hw_compat_10_1_len);
 }
 DEFINE_VIRT_MACHINE(10, 1)
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 7b7a381b0a..681adbb7ac 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -1118,8 +1118,11 @@ static void machine_class_init(ObjectClass *oc, const void *data)
      * SMBIOS 3.1.0 7.18.5 Memory Device — Extended Size
      * use max possible value that could be encoded into
      * 'Extended Size' field (2047Tb).
+     *
+     * Unfortunately (current) Windows Server 2025 and earlier do not handle
+     * 4Tb+ DIMM size.
      */
-    mc->smbios_memory_device_size = 2047 * TiB;
+    mc->smbios_memory_device_size = 2 * TiB;
 
     /* numa node memory size aligned on 8MB by default.
      * On Linux, each node's border has to be 8MB aligned
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index caf8bab68e..7b3611e973 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -448,6 +448,7 @@ DEFINE_I440FX_MACHINE_AS_LATEST(10, 2);
 static void pc_i440fx_machine_10_1_options(MachineClass *m)
 {
     pc_i440fx_machine_10_2_options(m);
+    m->smbios_memory_device_size = 2047 * TiB;
     compat_props_add(m->compat_props, hw_compat_10_1, hw_compat_10_1_len);
     compat_props_add(m->compat_props, pc_compat_10_1, pc_compat_10_1_len);
 }
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index e89951285e..6015e639d7 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -384,6 +384,7 @@ DEFINE_Q35_MACHINE_AS_LATEST(10, 2);
 static void pc_q35_machine_10_1_options(MachineClass *m)
 {
     pc_q35_machine_10_2_options(m);
+    m->smbios_memory_device_size = 2047 * TiB;
     compat_props_add(m->compat_props, hw_compat_10_1, hw_compat_10_1_len);
     compat_props_add(m->compat_props, pc_compat_10_1, pc_compat_10_1_len);
 }