On Sun, Nov 1, 2020 at 7:07 PM McDaniel, Timothy <timothy.mcdan...@intel.com> wrote: > > Availability of the MOVDIR64B instruction is indicated by the presence > > of the CPUID feature flag MOVDIR64B (bit 28 of the ECX register in > > leaf 07H, see “CPUID—CPU Identification” in the Intel® 64 and IA-32 > > Architectures Software Developer’s Manual, Volume 2A). > > > > I understand that calling this code must be under a check for > > RTE_CPUFLAG_MOVDIR64B. > > Which I can't find in this patchset. > > Fair enough question. We currently do not check for availability of MOVDIR64B > since > every Intel part that includes DLB or DLB2 is guaranteed to have the MOVDIR64B > instruction.
A check at probe time would not hurt, but if you are sure of it, ok. -- David Marchand
