Hello, I'm working with Carrizo APU (GCN3). I'm trying to figure out how I can flush GPU's cache so that cached data in GPU is explicitly flushed to physical memory (which will let CPU see the updated value). By going through GCN3 instruction manual, I found assembly instructions that write back L1 (s_dcache_wb) and scalar data cache (s_dcache_wb_vol). However, I couldn't find any information on how to flush L2 cache. Is there any instruction or way to explicitly flush GPU's L2 cache? Thank you!