linux-kernel - Re: [RFC PATCH V3 00/16] x86/hyperv/sev: Add AMD sev-snp enlightened guest support on hyperv

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Date:   Fri, 17 Feb 2023 13:47:55 +0100
From:   "Gupta, Pankaj" <pankaj.gupta@....com>
To:     Tianyu Lan <ltykernel@...il.com>, luto@...nel.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        seanjc@...gle.com, pbonzini@...hat.com, jgross@...e.com,
        tiala@...rosoft.com, kirill@...temov.name,
        jiangshan.ljs@...group.com, peterz@...radead.org,
        ashish.kalra@....com, srutherford@...gle.com,
        akpm@...ux-foundation.org, anshuman.khandual@....com,
        pawan.kumar.gupta@...ux.intel.com, adrian.hunter@...el.com,
        daniel.sneddon@...ux.intel.com, alexander.shishkin@...ux.intel.com,
        sandipan.das@....com, ray.huang@....com, brijesh.singh@....com,
        michael.roth@....com, thomas.lendacky@....com,
        venu.busireddy@...cle.com, sterritt@...gle.com,
        tony.luck@...el.com, samitolvanen@...gle.com, fenghua.yu@...el.com
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [RFC PATCH V3 00/16] x86/hyperv/sev: Add AMD sev-snp enlightened
 guest support on hyperv

On 2/9/2023 12:36 PM, Gupta, Pankaj wrote:
> Hi Tianyu,
> 
>> This patchset is to add AMD sev-snp enlightened guest
>> support on hyperv. Hyperv uses Linux direct boot mode
>> to boot up Linux kernel and so it needs to pvalidate
>> system memory by itself.
>>
>> In hyperv case, there is no boot loader and so cc blob
>> is prepared by hypervisor. In this series, hypervisor
>> set the cc blob address directly into boot parameter
>> of Linux kernel. If the magic number on cc blob address
>> is valid, kernel will read cc blob.
>>
>> Shared memory between guests and hypervisor should be
>> decrypted and zero memory after decrypt memory. The data
>> in the target address. It maybe smearedto avoid smearing
>> data.
>>
>> Introduce #HV exception support in AMD sev snp code and
>> #HV handler.
> 
> I am interested to test the Linux guest #HV exception handling (patches 
> 12-16 in this series) for the restricted interrupt injection with the 
> Linux/KVM host.
> 
> Do you have a git tree which or any base commit on which
> I can use to apply these patches?

Never mind. I could apply the patches 12-16 on master (except minor 
tweak in patch 14). Now, will try to test.

Thanks,
Pankaj