linux-kernel - Re: [PATCH v11 29/45] x86/boot: Add Confidential Computing type to setup

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Message-ID: <671a6137-0d45-3a8c-433a-32448019961f@amd.com>
Date:   Wed, 2 Mar 2022 08:25:45 -0600
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>,
        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.shutemov@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        "Dr . David Alan Gilbert" <dgilbert@...hat.com>,
        brijesh.ksingh@...il.com, tony.luck@...el.com, marcorr@...gle.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: Re: [PATCH v11 29/45] x86/boot: Add Confidential Computing type to
 setup_data



On 3/1/22 03:48, Borislav Petkov wrote:
> On Thu, Feb 24, 2022 at 10:56:09AM -0600, Brijesh Singh wrote:
>> +/*
>> + * AMD SEV Confidential computing blob structure. The structure is
>> + * defined in OVMF UEFI firmware header:
>> + * https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fblob%2Fmaster%2FOvmfPkg%2FInclude%2FGuid%2FConfidentialComputingSevSnpBlob.h&amp;data=04%7C01%7Cbrijesh.singh%40amd.com%7C72edb78e27f546ef783b08d9fb689fe6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637817249053086231%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=9rP%2FF18D4bR3Cku%2FIcXV0qJvC336y54sqYYkq9RAdAE%3D&amp;reserved=0
>> + */
>> +#define CC_BLOB_SEV_HDR_MAGIC	0x45444d41
>> +struct cc_blob_sev_info {
>> +	u32 magic;
> 	^^^^^^^^^^^^
> 
> You said you wanted to rename this:
> 
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F12b945a0-b18c-7f2a-52c7-5e22a944d7f5%40amd.com%2F&amp;data=04%7C01%7Cbrijesh.singh%40amd.com%7C72edb78e27f546ef783b08d9fb689fe6%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637817249053086231%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=biu1Pdk%2BO%2FIVaF5iE47aInOqGF36uAAVx%2BTSBLBxC9w%3D&amp;reserved=0
> 
> and further code is checking magic so I'm guessing you wanna rename the
> OVMF definition to "Magic" too?
> 

Yep, I am waiting for Linux patches to finalize and then sync OVMF with 
it. I will rename the field to magic in OVMF to keep both of them in sync.

-Brijesh