Re: [PATCH] x86/boot/64: Initialize 5-level paging variables earlier

[Borislav Petkov]

On Mon, Oct 12, 2020 at 11:35:01AM -0400, Arvind Sankar wrote:
> > qemu supports it. -cpu "qemu64,+la57"
>
> Thanks! On QEMU, it does crash without this patch.

Works fine here. I gave this to qemu:

-cpu qemu64,+la57,vendor=GenuineIntel

it said:

qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:ECX.la57 [bit 16]

because host is AMD, probably, and I have

CONFIG_X86_5LEVEL=y

enabled for the guest kernel and tip:x86/seves booted fine.

What am I missing?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette