Re: [x86-tip] RSDP changes converted i4790 box SMP -> UP

[Gabriel C]

On 15.01.2018 16:40, Juergen Gross wrote:
> On 15/01/18 16:32, Ingo Molnar wrote:
> >

Hi Juergen,

> > * Juergen Gross <jgross@xxxxxxxx> wrote:
> >
> > > On 15/01/18 15:56, Borislav Petkov wrote:
> > > > On Mon, Jan 15, 2018 at 03:52:25PM +0100, Juergen Gross wrote:
> > > > > Ingo, with my finding that above boot failure is related to a bug in
> > > > > openSUSE's grub2 (I've verified it soesn't exist in upstream grub2),
> > > >
> > > > The box I'm seeing this on has SLES12-SP2 grub:
> > > >
> > > > Version        : 2.02~beta2-115.9.1
> > > >
> > > > Does it have the same bug?
> > >
> > > The patch introducing this problem is from 2012. So I guess: yes.
> >
> > I suspect this makes it a widespread, unintended ABI. Can we detect and somehow avoid it?
> >
> > The boot protocol ABI sucks if it's fragile against such mistakes.
>
> Well, copying sizeof(setup_header) into grub2 and then coyping back just
> 1024 bytes is plain wrong. It is a miracle nothing broke up to now.

I'm not on SUSE and hit that too on an H11DSi-NT.
See: https://marc.info/?l=linux-kernel&m=151579540320553&w=2

Regards,

Gabriel C