diff --git a/Platforms/QemuSbsaPkg/Plugins/QemuRunner/QemuRunner.py b/Platforms/QemuSbsaPkg/Plugins/QemuRunner/QemuRunner.py
index 71eb43be..ffe86f1d 100644
--- a/Platforms/QemuSbsaPkg/Plugins/QemuRunner/QemuRunner.py
+++ b/Platforms/QemuSbsaPkg/Plugins/QemuRunner/QemuRunner.py
@@ -133,7 +133,7 @@ def Runner(env):
         qemu_version = QemuRunner.QueryQemuVersion(qemu_executable_path)
         qemu_cmd_builder = (
             QemuCommandBuilder(qemu_executable_path, QemuArchitecture.SBSA)
-            .with_cpu(cpu_model, 4)
+            .with_cpu(cpu_model, 1)
             .with_machine(qemu_accelerator)
             .with_memory(8192 if path_to_os else 2048)
             .with_firmware(code_fd, var_store)
diff --git a/Platforms/QemuSbsaPkg/QemuSbsaPkg.dsc b/Platforms/QemuSbsaPkg/QemuSbsaPkg.dsc
index c5571a0b..db466c94 100644
--- a/Platforms/QemuSbsaPkg/QemuSbsaPkg.dsc
+++ b/Platforms/QemuSbsaPkg/QemuSbsaPkg.dsc
@@ -595,7 +595,7 @@
 
   # Size of the region used by UEFI in permanent memory (Reserved 64MB)
   gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x04000000
-  gArmPlatformTokenSpaceGuid.PcdCoreCount|4
+  gArmPlatformTokenSpaceGuid.PcdCoreCount|1
 
   #
   # ARM PrimeCell