Re: [kaiser-discuss] KPTI backport to 3.16

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On Mon, 2018-01-08 at 15:19 +0000, Ben Hutchings wrote:
> > I tried this on a ThinkPad X230 (Ivy Bridge CPU, i7 3520M, so pcid but not
> > invpcid) on full UEFI mode and it doesn't boot at all. grub-efi loads the
> > kernel and initrd, but I don't have any message after “Loading initial
> > ramdisk” (even with debug earlyprintk=vga).
> 
> If you boot with EFI you need to use earlyprintk=efi.

Thanks! With that, I can see the last few log lines before it hangs:

Kernel/User page tables isolation: enabled
[…]
bootconsole [earlyefi0] disabled

and then nothing.

Also I must have done something wrong earlier today, because when booting with
 'nopcid' it does work (which is consistent with other people tests, afaict).

Regards,
-- 
Yves-Alexis

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