[vk/vma] force anv to have HOST_CACHED stream buffers

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/video_core/vulkan_common/vulkan_memory_allocator.cpp

@@ -256,14 +256,16 @@ namespace Vulkan {
                          device.GetDispatchLoader());
     }
 
-    vk::Buffer
-    MemoryAllocator::CreateBuffer(const VkBufferCreateInfo &ci, MemoryUsage usage) const
-    {
+    vk::Buffer MemoryAllocator::CreateBuffer(const VkBufferCreateInfo &ci, MemoryUsage usage) const {
+        // MESA will do memcpy() if not marked as host cached, so just force mark it for most buffers
+        auto const anv_flags = (usage == MemoryUsage::Stream
+            && device.GetDriverID() == VK_DRIVER_ID_INTEL_OPEN_SOURCE_MESA)
+            ? VK_MEMORY_PROPERTY_HOST_CACHED_BIT : 0;
         const VmaAllocationCreateInfo alloc_ci = {
                 .flags = VMA_ALLOCATION_CREATE_WITHIN_BUDGET_BIT | MemoryUsageVmaFlags(usage),
                 .usage = MemoryUsageVma(usage),
                 .requiredFlags = 0,
-                .preferredFlags = MemoryUsagePreferredVmaFlags(usage),
+            .preferredFlags = MemoryUsagePreferredVmaFlags(usage) | anv_flags,
                 .memoryTypeBits = usage == MemoryUsage::Stream ? 0u : valid_memory_types,
                 .pool = VK_NULL_HANDLE,
                 .pUserData = nullptr,