Message-ID: <fac62414-06f9-0454-8393-f039aa30571a@amd.com>
Date:   Thu, 9 Feb 2023 12:36:51 +0100
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From:   "Gupta, Pankaj" <pankaj.gupta@amd.com>
Subject: Re: [RFC PATCH V3 00/16] x86/hyperv/sev: Add AMD sev-snp enlightened
 guest support on hyperv
To:     Tianyu Lan <ltykernel@gmail.com>, luto@kernel.org,
        tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
        dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
        seanjc@google.com, pbonzini@redhat.com, jgross@suse.com,
        tiala@microsoft.com, kirill@shutemov.name,
        jiangshan.ljs@antgroup.com, peterz@infradead.org,
        ashish.kalra@amd.com, srutherford@google.com,
        akpm@linux-foundation.org, anshuman.khandual@arm.com,
        pawan.kumar.gupta@linux.intel.com, adrian.hunter@intel.com,
        daniel.sneddon@linux.intel.com, alexander.shishkin@linux.intel.com,
        sandipan.das@amd.com, ray.huang@amd.com, brijesh.singh@amd.com,
        michael.roth@amd.com, thomas.lendacky@amd.com,
        venu.busireddy@oracle.com, sterritt@google.com,
        tony.luck@intel.com, samitolvanen@google.com, fenghua.yu@intel.com
Cc:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        linux-hyperv@vger.kernel.org, linux-arch@vger.kernel.org
References: <20230122024607.788454-1-ltykernel@gmail.com>
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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