Re: [PATCH 6.8 271/273] x86/sme: Move early SME kernel encryption handling into .head.text

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On Wed, 10 Apr 2024 at 07:46, Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Wed, Apr 10, 2024 at 07:34:33AM +0200, Borislav Petkov wrote:
> > On Tue, Apr 09, 2024 at 06:38:53PM +0200, Pascal Ernster wrote:
> > > Just to make sure this doesn't get lost: This patch causes the kernel to not
> > > boot on several x86_64 VMs of mine (I haven't tested it on a bare metal
> > > machine). For details and a kernel config to reproduce the issue, see https://lore.kernel.org/stable/fd186a2b-0c62-4942-bed3-a27d72930310@xxxxxxxxxxxxxx/
> >
> > I see your .config there. How are you booting the VMs? qemu cmdline?
> >
> > Ard, anything missing in the backport?
> >
> > I'm busy and won't be able to look in the next couple of days...
>
> As reverting seems to resolve this, I'll go do that after my morning
> coffee kicks in...

Fair enough. I'll look into this today, but I guess you're on a tight
schedule with this release.

Please drop the subsequent patch as well:

x86/efistub: Remap kernel text read-only before dropping NX attribute

as it assumes that all code reachable from the startup entrypoint is
in .head.text and this will no longer be the case.




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