fix(agc): mirror only unimported tails of registered heaps

core/libs/prx/libSceAgcDriver/Execution/src/VulkanDevice.cpp

@@ -1390,7 +1390,8 @@ VulkanDevice::VulkanDevice(const PresentationWindow* window, bool compileOnly) :
     // Guest memory is host memory: importing it lets address-based shaders use it in place instead of
     // copying every registered allocation per draw.
     if (hasExtension(VK_EXT_EXTERNAL_MEMORY_HOST_EXTENSION_NAME) && std::getenv("APS5_NO_HOST_IMPORT") == nullptr) {
-        VkPhysicalDeviceDriverProperties driverProperties{VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DRIVER_PROPERTIES};
+        VkPhysicalDeviceMaintenance3Properties maintenance3{VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_3_PROPERTIES};
+        VkPhysicalDeviceDriverProperties driverProperties{VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DRIVER_PROPERTIES, &maintenance3};
         VkPhysicalDeviceExternalMemoryHostPropertiesEXT hostProperties{VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_MEMORY_HOST_PROPERTIES_EXT, &driverProperties};
         VkPhysicalDeviceProperties2 properties{VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2, &hostProperties};
         state->InstanceFunction<PFN_vkGetPhysicalDeviceProperties2>("vkGetPhysicalDeviceProperties2")(selected, &properties);
@@ -1402,6 +1403,7 @@ VulkanDevice::VulkanDevice(const PresentationWindow* window, bool compileOnly) :
 #endif
         state->drawInputsInPlace = std::getenv("APS5_NO_DRAW_INPUTS_IN_PLACE") == nullptr && (std::getenv("APS5_DRAW_INPUTS_IN_PLACE") != nullptr || DrawInputsInPlaceUsable(driverProperties.driverID, windows));
         if (!compileOnly) Graphics::SetHostImportWindow(8ull << 20u);
+        if (!compileOnly) Graphics::SetHostImportMaxBytes(maintenance3.maxMemoryAllocationSize);
 #ifdef _WIN32
         // Imported pages are locked; locking is bounded by the process working-set minimum.
         if (const char* value = std::getenv("APS5_WORKING_SET_MIB"); value != nullptr && !compileOnly) {

core/libs/prx/libSceAgcDriver/Graphics/include/GuestBufferMemory.hpp

@@ -113,6 +113,7 @@ void SetHostImportDeferredSettles(bool enabled);
 // The larger of 6 GiB and half the physical memory, at most the largest host heap less the larger of 2 GiB and half
 // that heap: the other half stays for the buffers, mirrors and textures that share it.
 std::uint64_t HostImportBudget(const VkPhysicalDeviceMemoryProperties& memory, std::uint64_t physicalBytes);
+void SetHostImportMaxBytes(std::uint64_t bytes);
 std::uint64_t HostImportLiveBytes();
 struct HostImportSettleCounts {
     std::uint64_t submitted = 0;