On Fri, Jun 15, 2018 at 08:57:40PM +0200, Thomas Gleixner wrote: > On Tue, 12 Jun 2018, Tom Lendacky wrote: > > On 6/11/2018 9:01 AM, Konrad Rzeszutek Wilk wrote: > > >> I think you will have to keep the case statements and explicitly check for > > >> X86_FEATURE_AMD_SSBD before using SPEC_CTRL. > > > > > > .. we could or alternatively add an extra check for X86_FEATURE_AMD_SSBD ? > > > > Whichever you feel is best, so long as we only use SPEC_CTRL for SSBD on > > AMD when X86_FEATURE_AMD_SSBD is present. > > Is there anyone working on a fix or has this been forgotten? I have it on my TODO. But a bit busy with the fpu lazy so will get to it done next week. Maybe along with the X86_FEATURE_IA32_ARCH_CAPS Bit(1): IBRS_ALL to disable retpoline on those machines. CCing Alex > > Thanks, > > tglx
