shader: synchronize GPU-written descriptor dependencies through buffer cache

src/graphics/host_gpu/renderer/pipeline/pipelineCache.cpp

@@ -95,7 +95,7 @@ void PipelineCacheLog(fmt::format_string<Args...> format, Args&&... args) {
 
 bool ReadShaderGuestMemory(void*, uint64_t address, std::span<uint32_t> values) {
 	return !values.empty() &&
-	       Libs::LibKernel::Memory::TryReadGpuCleanBacking(address, values.data(), values.size_bytes());
+	       Libs::LibKernel::Memory::TryReadGpuBacking(address, values.data(), values.size_bytes());
 }
 
 void DumpShaderSpirv(const char* stage_name, uint64_t shader_hash,

src/kernel/memory.cpp

@@ -881,13 +881,16 @@ bool TryReadBacking(uint64_t vaddr, void* data, uint64_t size) {
 	       g_guest_address_space->TryReadBacking(vaddr, data, size);
 }
 
-bool TryReadGpuCleanBacking(uint64_t vaddr, void* data, uint64_t size) {
+bool TryReadGpuBacking(uint64_t vaddr, void* data, uint64_t size) {
 	if (g_gpu_resources != nullptr && IsGpuAddressRange(vaddr, size)) {
 		if (!Graphics::GuestGpu::IsGpuThread() ||
-		    GetGpuResources().GetBufferCache().HasGpuDirtyBytes(vaddr, size) ||
 		    GetGpuResources().GetTextureCache().IsRegionGpuModified(vaddr, size)) {
 			return false;
 		}
+		auto& buffers = GetGpuResources().GetBufferCache();
+		if (buffers.HasGpuDirtyBytes(vaddr, size)) {
+			buffers.ReadMemory(vaddr, size);
+		}
 	}
 	return TryReadBacking(vaddr, data, size);
 }

src/kernel/memory.h

@@ -114,7 +114,7 @@ int AllocateDirectMemory(int64_t search_start, int64_t search_end, size_t size,
 int MapAutomaticMemory(uint64_t vaddr, size_t size, int type, int prot);
 bool                   TryWriteBacking(uint64_t vaddr, const void* data, uint64_t size);
 bool                   TryReadBacking(uint64_t vaddr, void* data, uint64_t size);
-bool                   TryReadGpuCleanBacking(uint64_t vaddr, void* data, uint64_t size);
+bool                   TryReadGpuBacking(uint64_t vaddr, void* data, uint64_t size);
 bool                   TryReadSparseBacking(uint64_t vaddr, void* data, uint64_t size);
 [[nodiscard]] uint64_t ClampRangeSize(uint64_t vaddr, uint64_t size);
 void                   WriteBacking(uint64_t vaddr, const void* data, uint64_t size) noexcept;