Virtualization - Feb 2021 - [PATCH 0/7] x86/seves: Support 32-bit boot path and other updates

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

Regards,

	Joerg

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