Chipmaker AMD has released new microcode updates to mitigate the Spectre variant 2 side-channel attack, which Microsoft has supported with a Windows 10 patch for AMD systems. AMD's latest microcode update coincided with Microsoft's April Patch Tuesday fixes and comes just weeks after Intel wrapped up its Spectre 2 mitigations for all CPU families released over the past nine years. AMD's chief mitigation for its chips on Windows affected by variant 2 CPU indirect branch target injections is called 'indirect branch prediction barrier' (IBPB), which is only intended for cases when software switches from one user context to a context...