On Thu, 2018-01-04 at 09:56 -0800, Tim Chen wrote:
> cpuid ax=0x7, return rdx bit 26 to indicate presence of this feature
> IA32_SPEC_CTRL (0x48) and IA32_PRED_CMD (0x49)
> IA32_SPEC_CTRL, bit0 – Indirect Branch Restricted Speculation (IBRS)
> IA32_PRED_CMD,  bit0 – Indirect Branch Prediction Barrier (IBPB)

In a previous iteration of these patches, hadn't you already merged
support for the AMD variant? Where'd that go?

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