[4.15 & 4.14 stable 03/12] x86/CPU: Check CPU feature bits after microcode upgrade

From: Borislav Petkov commit 42ca8082e260dcfd8afa2afa6ec1940b9d41724c upstream With some microcode upgrades, new CPUID features can become visible on the CPU. Check what the kernel has mirrored now and issue a warning hinting at possible things the user/admin can do to make use of

[4.15 & 4.14 stable 03/12] x86/CPU: Check CPU feature bits after microcode upgrade

From: Borislav Petkov commit 42ca8082e260dcfd8afa2afa6ec1940b9d41724c upstream With some microcode upgrades, new CPUID features can become visible on the CPU. Check what the kernel has mirrored now and issue a warning hinting at possible things the user/admin can do to make use of the newly