Re: [PATCH 04/12] x86/sev: Do not hardcode GHCB protocol version

Hi Tom,

On Wed, Jul 21, 2021 at 04:17:38PM -0500, Tom Lendacky wrote:

On 7/21/21 9:20 AM, Joerg Roedel wrote:

quoted

 	/* Fill in protocol and format specifiers */
-	ghcb->protocol_version = GHCB_PROTOCOL_MAX;
+	ghcb->protocol_version = sev_get_ghcb_proto_ver();

So this probably needs better clarification in the spec, but the GHCB
version field is for the GHCB structure layout. So if you don't plan to
use the XSS field that was added for version 2 of the layout, then you
should report the GHCB structure version as 1.

Yeah, this makes sense, exept for the struct field-name ;) But anyway, I
keep the version field at 1 for now.

Regards,

	Joerg