linux-kernel - Re: [PATCH Part2 v6 05/49] x86/sev: Add RMP entry lookup helpers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Ytr8nCL6pa2Q1kWy@zn.tnic>
Date:   Fri, 22 Jul 2022 21:38:04 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     "Kalra, Ashish" <Ashish.Kalra@....com>,
        Dave Hansen <dave.hansen@...el.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-coco@...ts.linux.dev" <linux-coco@...ts.linux.dev>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "jroedel@...e.de" <jroedel@...e.de>,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        "hpa@...or.com" <hpa@...or.com>,
        "ardb@...nel.org" <ardb@...nel.org>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "jmattson@...gle.com" <jmattson@...gle.com>,
        "luto@...nel.org" <luto@...nel.org>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "slp@...hat.com" <slp@...hat.com>,
        "pgonda@...gle.com" <pgonda@...gle.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "srinivas.pandruvada@...ux.intel.com" 
        <srinivas.pandruvada@...ux.intel.com>,
        "rientjes@...gle.com" <rientjes@...gle.com>,
        "dovmurik@...ux.ibm.com" <dovmurik@...ux.ibm.com>,
        "tobin@....com" <tobin@....com>,
        "Roth, Michael" <Michael.Roth@....com>,
        "vbabka@...e.cz" <vbabka@...e.cz>,
        "kirill@...temov.name" <kirill@...temov.name>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>,
        "tony.luck@...el.com" <tony.luck@...el.com>,
        "marcorr@...gle.com" <marcorr@...gle.com>,
        "sathyanarayanan.kuppuswamy@...ux.intel.com" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "alpergun@...gle.com" <alpergun@...gle.com>,
        "dgilbert@...hat.com" <dgilbert@...hat.com>,
        "jarkko@...nel.org" <jarkko@...nel.org>
Subject: Re: [PATCH Part2 v6 05/49] x86/sev: Add RMP entry lookup helpers

Btw,

what could work is to spec only a *version* field somewhere in the HW or
FW which says which version the RMP header has.

Then, OS would check that field and if it doesn't support that certain
version, it'll bail.

I'd need to talk to folks first, though, what the whole story is behind
not spec-ing the RMP format...

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette