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Message-ID: <20200603152436.GA17841@8bytes.org>
Date: Wed, 3 Jun 2020 17:24:36 +0200
From: Joerg Roedel <joro@...tes.org>
To: Borislav Petkov <bp@...en8.de>
Cc: x86@...nel.org, hpa@...or.com, Andy Lutomirski <luto@...nel.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Thomas Hellstrom <thellstrom@...are.com>,
Jiri Slaby <jslaby@...e.cz>,
Dan Williams <dan.j.williams@...el.com>,
Tom Lendacky <thomas.lendacky@....com>,
Juergen Gross <jgross@...e.com>,
Kees Cook <keescook@...omium.org>,
David Rientjes <rientjes@...gle.com>,
Cfir Cohen <cfir@...gle.com>,
Erdem Aktas <erdemaktas@...gle.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Mike Stunes <mstunes@...are.com>,
Joerg Roedel <jroedel@...e.de>, linux-kernel@...r.kernel.org,
kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v3 38/75] x86/sev-es: Add SEV-ES Feature Detection
On Wed, May 20, 2020 at 10:39:16AM +0200, Borislav Petkov wrote:
> On Tue, Apr 28, 2020 at 05:16:48PM +0200, Joerg Roedel wrote:
> > +bool sev_es_active(void)
> > +{
> > + return !!(sev_status & MSR_AMD64_SEV_ES_ENABLED);
> > +}
> > +EXPORT_SYMBOL_GPL(sev_es_active);
>
> I don't see this being used in modules anywhere in the patchset. Or am I
> missing something?
It is used in several places, for example do do_nmi() to conditionally
re-open the NMI window in SEV-ES guests. But there are other uses too,
like int sev_es_efi_map_ghcbs() or in sev_es_init_vc_handling() to opt
out if not running as an SEV-ES guest.
Joerg
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