linux-kernel - Re: [PATCH Part2 v5 14/45] crypto: ccp: Handle the legacy TMR allocation when SNP is enabled

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Date:   Tue, 1 Mar 2022 08:12:59 -0600
From:   Brijesh Singh <brijesh.singh@....com>
To:     Alper Gun <alpergun@...gle.com>
Cc:     brijesh.singh@....com, x86@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-coco@...ts.linux.dev, linux-mm@...ck.org,
        linux-crypto@...r.kernel.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>,
        Borislav Petkov <bp@...en8.de>,
        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 Part2 v5 14/45] crypto: ccp: Handle the legacy TMR
 allocation when SNP is enabled

Hi Alper,

On 2/25/22 12:03, Alper Gun wrote:

>>
>> -               free_pages((unsigned long)sev_es_tmr,
>> -                          get_order(SEV_ES_TMR_SIZE));
>> +               __snp_free_firmware_pages(virt_to_page(sev_es_tmr),
>> +                                         get_order(sev_es_tmr_size),
>> +                                         false);
> Shouldn't there be a check here for snp_inited before calling rmpupdate.
> TMR page can exist even if the SNP is not supported.
> 

Yes, I have this fix in my WIP branch and will be included in the v6.

thanks