On Mon, Feb 19, 2018 at 09:29:12AM +0000, David Woodhouse wrote: > On Mon, 2018-02-19 at 10:20 +0100, Peter Zijlstra wrote: > > > > I did not update or otherwise change packages while I was bisecting; the > > machine is: > > > > vendor_id : GenuineIntel > > cpu family : 6 > > model : 62 > > model name : Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz > > stepping : 4 > > microcode : 0x428 > > That's IVX with a microcode that doesn't *have* IBRS/IBPB. I don't > think there's a publicly available microcode that does; I assume you > didn't have one and build it into your kernel for early loading, and > thus you really weren't even using IBRS here? The code never even gets > patched in? I wasn't using IRBS afaik. I was bisceting tip/master before the IBRS/firmware patches (not sure they're in now or not). No fancy ucode setup, I think I have ucode image in the initrd, but that would be same for all kernels. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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