add an option to choose buffer cache type

src/Cafe/CafeSystem.cpp

@@ -258,7 +258,7 @@ void InfoLog_PrintActiveSettings()
 	{
 	    cemuLog_log(LogType::Force, "Async compile: {}", GetConfig().async_compile.GetValue() ? "true" : "false");
 		cemuLog_log(LogType::Force, "Fast math: {}", GetConfig().fast_math.GetValue() ? "true" : "false");
-		cemuLog_log(LogType::Force, "Use host memory for cache: {}", g_current_game_profile->UseHostMemForCache() ? "true" : "false");
+		cemuLog_log(LogType::Force, "Buffer cache type: {}", g_current_game_profile->GetBufferCacheType());
 		if (!GetConfig().vk_accurate_barriers.GetValue())
 			cemuLog_log(LogType::Force, "Accurate barriers are disabled!");
 	}

src/Cafe/GameProfile/GameProfile.cpp

@@ -226,7 +226,7 @@ bool GameProfile::Load(uint64_t title_id)
 				m_graphics_api = (GraphicAPI)graphicsApi.value;
 
 			gameProfile_loadEnumOption(iniParser, "accurateShaderMul", m_accurateShaderMul);
-			gameProfile_loadBooleanOption2(iniParser, "useHostMemForCache", m_useHostMemForCache);
+			gameProfile_loadEnumOption(iniParser, "bufferCacheType", m_bufferCacheType);
 
 			// legacy support
 			auto option_precompiledShaders = iniParser.FindOption("precompiledShaders");
@@ -309,7 +309,7 @@ void GameProfile::Save(uint64_t title_id)
 
 	fs->writeLine("[Graphics]");
 	WRITE_ENTRY(accurateShaderMul);
-	WRITE_ENTRY(useHostMemForCache);
+	WRITE_ENTRY(bufferCacheType);
 	WRITE_OPTIONAL_ENTRY(precompiledShaders);
 	WRITE_OPTIONAL_ENTRY(graphics_api);
 	fs->writeLine("");
@@ -339,7 +339,7 @@ void GameProfile::ResetOptional()
 
 	// graphic settings
 	m_accurateShaderMul = AccurateShaderMulOption::True;
-	m_useHostMemForCache = false;
+	m_bufferCacheType = BufferCacheType::DevicePrivate;
 	// cpu settings
 	m_threadQuantum = kThreadQuantumDefault;
 	m_cpuMode.reset(); // CPUModeOption::kSingleCoreRecompiler;
@@ -360,7 +360,7 @@ void GameProfile::Reset()
 
 	// graphic settings
 	m_accurateShaderMul = AccurateShaderMulOption::True;
-	m_useHostMemForCache = false;
+	m_bufferCacheType = BufferCacheType::DevicePrivate;
 	m_precompiledShaders = PrecompiledShaderOption::Auto;
 	// cpu settings
 	m_threadQuantum = kThreadQuantumDefault;

src/Cafe/GameProfile/GameProfile.h

@@ -31,7 +31,7 @@ class GameProfile
 
 	[[nodiscard]] const std::optional<GraphicAPI>& GetGraphicsAPI() const { return m_graphics_api; }
 	[[nodiscard]] const AccurateShaderMulOption& GetAccurateShaderMul() const { return m_accurateShaderMul; }
-	[[nodiscard]] bool UseHostMemForCache() const { return m_useHostMemForCache; }
+	[[nodiscard]] BufferCacheType GetBufferCacheType() const { return m_bufferCacheType; }
 	[[nodiscard]] const std::optional<PrecompiledShaderOption>& GetPrecompiledShadersState() const { return m_precompiledShaders; }
 
 	[[nodiscard]] uint32 GetThreadQuantum() const { return m_threadQuantum; }
@@ -55,7 +55,7 @@ class GameProfile
 	// graphic settings
 	std::optional<GraphicAPI> m_graphics_api{};
 	AccurateShaderMulOption m_accurateShaderMul = AccurateShaderMulOption::True;
-	bool m_useHostMemForCache = false;
+	BufferCacheType m_bufferCacheType = BufferCacheType::DevicePrivate;
 	std::optional<PrecompiledShaderOption> m_precompiledShaders{};
 	// cpu settings
 	uint32 m_threadQuantum = kThreadQuantumDefault; // values: 20000 45000 60000 80000 100000

src/Cafe/HW/Latte/Renderer/Metal/MetalMemoryManager.cpp

@@ -4,7 +4,6 @@
 
 #include "Cemu/Logging/CemuLogging.h"
 #include "Common/precompiled.h"
-#include "GameProfile/GameProfile.h"
 
 /*
 MetalVertexBufferCache::~MetalVertexBufferCache()
@@ -118,21 +117,24 @@ void MetalMemoryManager::InitBufferCache(size_t size)
 {
     cemu_assert_debug(!m_bufferCache);
 
+    m_bufferCacheType = g_current_game_profile->GetBufferCacheType();
+
     // First, try to import the host memory as a buffer
-    if (g_current_game_profile->UseHostMemForCache() && m_mtlr->IsAppleGPU())
+    if (m_bufferCacheType == BufferCacheType::Host && m_mtlr->IsAppleGPU())
     {
         m_importedMemBaseAddress = 0x10000000;
     	size_t hostAllocationSize = 0x40000000ull;
     	// TODO: get size of allocation
         m_bufferCache = m_mtlr->GetDevice()->newBuffer(memory_getPointerFromVirtualOffset(m_importedMemBaseAddress), hostAllocationSize, MTL::ResourceStorageModeShared, nullptr);
-        if (m_bufferCache)
-            m_useHostMemoryForCache = true;
-        else
+        if (!m_bufferCache)
+        {
             cemuLog_logDebug(LogType::Force, "Failed to import host memory as a buffer");
+            m_bufferCacheType = BufferCacheType::DevicePrivate;
+        }
     }
 
-    if (!m_useHostMemoryForCache)
-        m_bufferCache = m_mtlr->GetDevice()->newBuffer(size, MTL::ResourceStorageModePrivate);
+    if (!m_bufferCache)
+        m_bufferCache = m_mtlr->GetDevice()->newBuffer(size, (m_bufferCacheType == BufferCacheType::DevicePrivate ? MTL::ResourceStorageModePrivate : MTL::ResourceStorageModeShared));
 
 #ifdef CEMU_DEBUG_ASSERT
     m_bufferCache->setLabel(GetLabel("Buffer cache", m_bufferCache));
@@ -141,32 +143,43 @@ void MetalMemoryManager::InitBufferCache(size_t size)
 
 void MetalMemoryManager::UploadToBufferCache(const void* data, size_t offset, size_t size)
 {
-    cemu_assert_debug(!m_useHostMemoryForCache);
+    cemu_assert_debug(m_bufferCacheType != BufferCacheType::Host);
     cemu_assert_debug(m_bufferCache);
     cemu_assert_debug((offset + size) <= m_bufferCache->length());
 
-    auto allocation = m_tempBufferAllocator.GetBufferAllocation(size);
-    auto buffer = m_tempBufferAllocator.GetBufferOutsideOfCommandBuffer(allocation.bufferIndex);
-    memcpy((uint8*)buffer->contents() + allocation.offset, data, size);
+    if (m_bufferCacheType == BufferCacheType::DevicePrivate)
+    {
+        auto allocation = m_tempBufferAllocator.GetBufferAllocation(size);
+        auto buffer = m_tempBufferAllocator.GetBufferOutsideOfCommandBuffer(allocation.bufferIndex);
+        memcpy((uint8*)buffer->contents() + allocation.offset, data, size);
 
-    // Lock the buffer to make sure it's not deallocated before the copy is done
-    m_tempBufferAllocator.LockBuffer(allocation.bufferIndex);
+        // Lock the buffer to make sure it's not deallocated before the copy is done
+        m_tempBufferAllocator.LockBuffer(allocation.bufferIndex);
 
-    m_mtlr->CopyBufferToBuffer(buffer, allocation.offset, m_bufferCache, offset, size, ALL_MTL_RENDER_STAGES, ALL_MTL_RENDER_STAGES);
+        m_mtlr->CopyBufferToBuffer(buffer, allocation.offset, m_bufferCache, offset, size, ALL_MTL_RENDER_STAGES, ALL_MTL_RENDER_STAGES);
 
-    // Make sure the buffer has the right command buffer
-    m_tempBufferAllocator.GetBuffer(allocation.bufferIndex); // TODO: make a helper function for this
+        // Make sure the buffer has the right command buffer
+        m_tempBufferAllocator.GetBuffer(allocation.bufferIndex); // TODO: make a helper function for this
 
-    // We can now safely unlock the buffer
-    m_tempBufferAllocator.UnlockBuffer(allocation.bufferIndex);
+        // We can now safely unlock the buffer
+        m_tempBufferAllocator.UnlockBuffer(allocation.bufferIndex);
+    }
+    else
+    {
+        memcpy((uint8*)m_bufferCache->contents() + offset, data, size);
+    }
 
     // Notify vertex buffer cache about the change
     //m_vertexBufferCache.MemoryRangeChanged(offset, size);
 }
 
 void MetalMemoryManager::CopyBufferCache(size_t srcOffset, size_t dstOffset, size_t size)
 {
+    cemu_assert_debug(m_bufferCacheType != BufferCacheType::Host);
     cemu_assert_debug(m_bufferCache);
 
-    m_mtlr->CopyBufferToBuffer(m_bufferCache, srcOffset, m_bufferCache, dstOffset, size, ALL_MTL_RENDER_STAGES, ALL_MTL_RENDER_STAGES);
+    if (m_bufferCacheType == BufferCacheType::DevicePrivate)
+        m_mtlr->CopyBufferToBuffer(m_bufferCache, srcOffset, m_bufferCache, dstOffset, size, ALL_MTL_RENDER_STAGES, ALL_MTL_RENDER_STAGES);
+    else
+        memcpy((uint8*)m_bufferCache->contents() + dstOffset, (uint8*)m_bufferCache->contents() + srcOffset, size);
 }

src/Cafe/HW/Latte/Renderer/Metal/MetalMemoryManager.h

@@ -2,6 +2,8 @@
 
 #include "Cafe/HW/Latte/Renderer/Metal/MetalBufferAllocator.h"
 
+#include "GameProfile/GameProfile.h"
+
 /*
 struct MetalRestridedBufferRange
 {
@@ -118,7 +120,7 @@ class MetalMemoryManager
     // Getters
     bool UseHostMemoryForCache() const
     {
-        return m_useHostMemoryForCache;
+        return (m_bufferCacheType == BufferCacheType::Host);
     }
 
     MPTR GetImportedMemBaseAddress() const
@@ -137,6 +139,6 @@ class MetalMemoryManager
     //MetalVertexBufferCache m_vertexBufferCache;
 
     MTL::Buffer* m_bufferCache = nullptr;
-    bool m_useHostMemoryForCache = false;
+    BufferCacheType m_bufferCacheType;
     MPTR m_importedMemBaseAddress;
 };

src/config/CemuConfig.h

@@ -124,6 +124,14 @@ enum class AccurateShaderMulOption
 };
 ENABLE_ENUM_ITERATORS(AccurateShaderMulOption, AccurateShaderMulOption::False, AccurateShaderMulOption::True);
 
+enum class BufferCacheType
+{
+    DevicePrivate,
+    DeviceShared,
+    Host,
+};
+ENABLE_ENUM_ITERATORS(BufferCacheType, BufferCacheType::DevicePrivate, BufferCacheType::Host);
+
 enum class CPUMode
 {
 	SinglecoreInterpreter = 0,
@@ -222,6 +230,21 @@ struct fmt::formatter<AccurateShaderMulOption> : formatter<string_view> {
 	}
 };
 template <>
+struct fmt::formatter<BufferCacheType> : formatter<string_view> {
+	template <typename FormatContext>
+	auto format(const BufferCacheType c, FormatContext &ctx) const {
+		string_view name;
+		switch (c)
+		{
+		case BufferCacheType::DevicePrivate: name = "device private"; break;
+		case BufferCacheType::DeviceShared: name = "device shared"; break;
+		case BufferCacheType::Host: name = "host"; break;
+		default: name = "unknown"; break;
+		}
+		return formatter<string_view>::format(name, ctx);
+	}
+};
+template <>
 struct fmt::formatter<CPUMode> : formatter<string_view> {
 	template <typename FormatContext>
 	auto format(const CPUMode c, FormatContext &ctx) const {

src/gui/GameProfileWindow.cpp

@@ -8,6 +8,7 @@
 #include <wx/wupdlock.h>
 #include <wx/slider.h>
 
+#include "config/CemuConfig.h"
 #include "gui/helpers/wxHelpers.h"
 #include "input/InputManager.h"
 
@@ -127,12 +128,12 @@ GameProfileWindow::GameProfileWindow(wxWindow* parent, uint64_t title_id)
 		m_shader_mul_accuracy->SetToolTip(_("EXPERT OPTION\nControls the accuracy of floating point multiplication in shaders.\n\nRecommended: true"));
 		first_row->Add(m_shader_mul_accuracy, 0, wxALL, 5);
 
-		first_row->Add(new wxStaticText(panel, wxID_ANY, _("Use host memory for cache")), 0, wxALIGN_CENTER_VERTICAL | wxALL, 5);
+		first_row->Add(new wxStaticText(panel, wxID_ANY, _("Buffer cache type")), 0, wxALIGN_CENTER_VERTICAL | wxALL, 5);
 
-		wxString mem_values[] = { _("false"), _("true")};
-		m_use_host_mem_for_cache = new wxChoice(panel, wxID_ANY, wxDefaultPosition, wxDefaultSize, (int)std::size(mem_values), mem_values);
-		m_use_host_mem_for_cache->SetToolTip(_("EXPERT OPTION\nAllows the GPU to access data directly without the need for an intermediate cache. May increase performance and reduce memory usage, but can also cause flickering.\n\nMetal only\n\nRecommended: false"));
-		first_row->Add(m_use_host_mem_for_cache, 0, wxALL, 5);
+		wxString cache_values[] = { _("device private"), _("device shared"), _("host")};
+		m_buffer_cache_type = new wxChoice(panel, wxID_ANY, wxDefaultPosition, wxDefaultSize, (int)std::size(cache_values), cache_values);
+		m_buffer_cache_type->SetToolTip(_("EXPERT OPTION\nDecides how the buffer cache memory will be managed.\n\nMetal only\n\nRecommended: device private"));
+		first_row->Add(m_buffer_cache_type, 0, wxALL, 5);
 
 		/*first_row->Add(new wxStaticText(panel, wxID_ANY, _("GPU buffer cache accuracy")), 0, wxALIGN_CENTER_VERTICAL | wxALL, 5);
 		wxString accuarcy_values[] = { _("high"), _("medium"), _("low") };
@@ -280,7 +281,7 @@ void GameProfileWindow::ApplyProfile()
 	else
 		m_graphic_api->SetSelection(1 + m_game_profile.m_graphics_api.value()); // "", OpenGL, Vulkan, Metal
 	m_shader_mul_accuracy->SetSelection((int)m_game_profile.m_accurateShaderMul);
-	m_use_host_mem_for_cache->SetSelection((int)m_game_profile.m_useHostMemForCache);
+	m_buffer_cache_type->SetSelection((int)m_game_profile.m_bufferCacheType);
 
 	//// audio
 	//m_disable_audio->Set3StateValue(GetCheckboxState(m_game_profile.disableAudio));
@@ -340,7 +341,7 @@ void GameProfileWindow::SaveProfile()
 
 	// gpu
 	m_game_profile.m_accurateShaderMul = (AccurateShaderMulOption)m_shader_mul_accuracy->GetSelection();
-	m_game_profile.m_useHostMemForCache = (bool)m_use_host_mem_for_cache->GetSelection();
+	m_game_profile.m_bufferCacheType = (BufferCacheType)m_buffer_cache_type->GetSelection();
 	if (m_game_profile.m_accurateShaderMul != AccurateShaderMulOption::False && m_game_profile.m_accurateShaderMul != AccurateShaderMulOption::True)
 		m_game_profile.m_accurateShaderMul = AccurateShaderMulOption::True; // force a legal value
 

src/gui/GameProfileWindow.h

@@ -40,7 +40,7 @@ class GameProfileWindow : public wxFrame
 	wxChoice* m_graphic_api;
 
 	wxChoice* m_shader_mul_accuracy;
-	wxChoice* m_use_host_mem_for_cache;
+	wxChoice* m_buffer_cache_type;
 	//wxChoice* m_cache_accuracy;
 
 	// audio