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

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Message-ID: <fac62414-06f9-0454-8393-f039aa30571a@amd.com>
Date:   Thu, 9 Feb 2023 12:36:51 +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

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?

Thank You,
Pankaj