[dxgi] Remove emulateUMA option

The option was only used for GTA IV.
It broke and we have a better solution now.

dxvk.conf

@@ -118,15 +118,6 @@
 # dxgi.maxSharedMemory = 0
 
 
-# Some games think we are on Intel given a lack of NVAPI or
-# AGS/atiadlxx support. Report our device memory as shared memory,
-# and some small amount for a "carveout".
-
-# Supported values: True, False
-
-# dxgi.emulateUMA = False
-
-
 # Override back buffer count for the Vulkan swap chain.
 # Setting this to 0 or less will have no effect.
 #

src/dxgi/dxgi_adapter.cpp

@@ -353,7 +353,7 @@ namespace dxvk {
     // which can be an integrated GPU on some systems. Report available memory as shared
     // memory and a small amount as dedicated carve-out if a dedicated GPU is present,
     // otherwise report memory normally to not unnecessarily confuse games on Deck.
-    if ((m_adapter->isLinkedToDGPU() && deviceProp.deviceType == VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU) || options->emulateUMA) {
+    if ((m_adapter->isLinkedToDGPU() && deviceProp.deviceType == VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU)) {
       sharedMemory = std::max(sharedMemory, deviceMemory);
       deviceMemory = 512ull << 20;
     }

src/dxgi/dxgi_options.cpp

@@ -85,9 +85,6 @@ namespace dxvk {
     this->customVendorId = parsePciId(config.getOption<std::string>("dxgi.customVendorId"));
     this->customDeviceId = parsePciId(config.getOption<std::string>("dxgi.customDeviceId"));
     this->customDeviceDesc = config.getOption<std::string>("dxgi.customDeviceDesc", "");
-
-    // Emulate a UMA device
-    this->emulateUMA = config.getOption<bool>("dxgi.emulateUMA", false);
 
     // Interpret the memory limits as Megabytes
     this->maxDeviceMemory = VkDeviceSize(config.getOption<int32_t>("dxgi.maxDeviceMemory", 0)) << 20;

src/dxgi/dxgi_options.h

@@ -30,9 +30,6 @@ namespace dxvk {
     VkDeviceSize maxDeviceMemory;
     VkDeviceSize maxSharedMemory;
 
-    /// Emulate UMA
-    bool emulateUMA;
-
     /// Reports Nvidia GPUs running on the proprietary driver as a different
     /// vendor (usually AMD). Proton will generally disable this option.
     bool hideNvidiaGpu;