linux-kernel - Re: [PATCH Part1 v5 36/38] virt: Add SEV-SNP guest driver

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Message-ID: <bb72ce36-19d3-e2df-fa51-3940e4e9118e@amd.com>
Date:   Tue, 7 Sep 2021 08:35:13 -0500
From:   Brijesh Singh <brijesh.singh@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     brijesh.singh@....com, x86@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-coco@...ts.linux.dev, linux-mm@...ck.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Joerg Roedel <jroedel@...e.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        "H. Peter Anvin" <hpa@...or.com>, Ard Biesheuvel <ardb@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Sergio Lopez <slp@...hat.com>, Peter Gonda <pgonda@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        David Rientjes <rientjes@...gle.com>,
        Dov Murik <dovmurik@...ux.ibm.com>,
        Tobin Feldman-Fitzthum <tobin@....com>,
        Michael Roth <michael.roth@....com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Andi Kleen <ak@...ux.intel.com>, tony.luck@...el.com,
        marcorr@...gle.com, sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: Re: [PATCH Part1 v5 36/38] virt: Add SEV-SNP guest driver

Hi Boris,

I will update doc and commit per your feedback.

On 9/6/21 12:38 PM, Borislav Petkov wrote:
> 
> So you said earlier:
> 
>> I followed the naming convension you recommended during the initial SEV driver
>> developement. IIRC, the main reason for us having to add "user" in it because
>> we wanted to distinguious that this structure is not exactly same as the what
>> is defined in the SEV-SNP firmware spec.
> 
> but looking at the current variant in the code, the structure in the SNP spec is
> 
> Table 91. Layout of the CMDBUF_SNP_GUEST_REQUEST Structure
> 
> which corresponds to struct snp_guest_request_data so you can call this one:
> 
> 	struct snp_guest_request_ioctl
> 
> and then it is perfectly clear what is what.

Noted.

> 
> 
> "... which can be found at https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdeveloper.amd.com%2Fsev%2F&amp;data=04%7C01%7Cbrijesh.singh%40amd.com%7C9bc8f642dbad48a2a78008d9715d1edd%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637665467074351191%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=Iiz3emjR%2Blx8H73g2N0bOfPHeXXv%2FhLtlljOWNoD2mQ%3D&amp;reserved=0."
> 
> assuming that URL will keep its validity in the foreseeable future.

Unfortunately, the doc folks are replacing the current spec with the 
new, and previous URLs are no longer valid. I will spell out the spec 
version number so that anyone downloading the spec from bugzilla will 
able to locate it.


thanks
Brijesh