On 1/10/2018 7:15 AM, Woodhouse, David wrote: > On Tue, 2018-01-09 at 18:28 -0800, Andi Kleen wrote: >> From: Andi Kleen <[email protected]> >> >> X86_FEATURE_RETPOLINE has been renamed to X86_FEATURE_RETPOLINE_GENERIC. >> Convert the sequences using it. > > AMD documentation says they need the RSB fill too, so these should stay > under X86_FEATURE_RETPOLINE I think.
AMD processors don't fall back to the indirect predictor on an underflow so this isn't needed on AMD if it is purely for underflow prevention. Thanks, Tom > > > > Amazon Web Services UK Limited. Registered in England and Wales with > registration number 08650665 and which has its registered office at 60 > Holborn Viaduct, London EC1A 2FD, United Kingdom.
