Radim Kr?má? <rkrc...@redhat.com> wrote: > 2015-01-14 01:27+0000, Wu, Feng: >>> the new >>>> hardware even doesn't consider the TPR for lowest priority interrupts >>> delivery. >>> >>> A bold move ... what hardware was the first to do so? >> >> I think it was starting with Nehalem. > > Thanks, (Could be that QPI can't inform about TPR changes anymore ...) > > I played with Linux's TPR on Haswell and found that is has no effect.
Sorry for jumping into the discussion, but doesn’t it depend on IA32_MISC_ENABLE[23]? This bit disables xTPR messages. On my machine it is set (probably by the BIOS), but since there is no IA32_MISC_ENABLE is not locked for changes, the OS can control it. Nadav _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
