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Date:   Wed, 10 Feb 2021 10:19:38 -0500
From:   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To:     Joerg Roedel <joro@8bytes.org>
Cc:     daniel.kiper@oracle.com, x86@kernel.org,
        Joerg Roedel <jroedel@suse.de>, hpa@zytor.com,
        Andy Lutomirski <luto@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Jiri Slaby <jslaby@suse.cz>,
        Dan Williams <dan.j.williams@intel.com>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Juergen Gross <jgross@suse.com>,
        Kees Cook <keescook@chromium.org>,
        David Rientjes <rientjes@google.com>,
        Cfir Cohen <cfir@google.com>,
        Erdem Aktas <erdemaktas@google.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Mike Stunes <mstunes@vmware.com>,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        Martin Radev <martin.b.radev@gmail.com>,
        Arvind Sankar <nivedita@alum.mit.edu>,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        virtualization@lists.linux-foundation.org
Subject: Re: [PATCH 0/7] x86/seves: Support 32-bit boot path and other updates
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References: <20210210102135.30667-1-joro@8bytes.org>
 <20210210145835.GE358613@fedora>
 <20210210151224.GC7302@8bytes.org>
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On Wed, Feb 10, 2021 at 04:12:25PM +0100, Joerg Roedel wrote:
> Hi Konrad,
> 
> On Wed, Feb 10, 2021 at 09:58:35AM -0500, Konrad Rzeszutek Wilk wrote:
> > What GRUB versions are we talking about (CC-ing Daniel Kiper, who owns
> > GRUB).
> 
> I think this was about 32-bit GRUB builds used by distributions. I
> personally tested it with a kernel which has EFI support disabled, in
> this case the OVMF firmware will also boot into the startup_32 boot
> path.

I think I am missing something obvious here - but why would you want
EFI support disabled?

Or is the idea that "legacy" OSes can nicely run under AMD SEV?
But since you are having a kernel patch that is not "legacy OS" anymore.

> 
> > By 'some firmware' we talking SeaBIOS?
> 
> No, SeaBIOS is not supported for SEV-ES, only OVMF has handling for #VC
> so far.
> 
> Regards,
> 
> 	Joerg