linux-kernel - Re: [RFC PATCH 0/6] KVM: guest memory: Misc enhacnement

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Message-ID: <20230626205445.GD3436214@ls.amr.corp.intel.com>
Date:   Mon, 26 Jun 2023 13:54:45 -0700
From:   Isaku Yamahata <isaku.yamahata@...il.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     isaku.yamahata@...el.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, isaku.yamahata@...il.com,
        Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
        Sagi Shahar <sagis@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Kai Huang <kai.huang@...el.com>,
        Zhi Wang <zhi.wang.linux@...il.com>, chen.bo@...el.com,
        linux-coco@...ts.linux.dev,
        Chao Peng <chao.p.peng@...ux.intel.com>,
        Ackerley Tng <ackerleytng@...gle.com>,
        Vishal Annapurve <vannapurve@...gle.com>,
        Michael Roth <michael.roth@....com>
Subject: Re: [RFC PATCH 0/6] KVM: guest memory: Misc enhacnement

On Fri, Jun 23, 2023 at 05:09:26PM -0700,
Sean Christopherson <seanjc@...gle.com> wrote:

> On Thu, Jun 15, 2023, isaku.yamahata@...el.com wrote:
> > * VM type: Now we have KVM_X86_PROTECTED_VM. How do we proceed?
> >   - Keep KVM_X86_PROTECTED_VM for its use. Introduce KVM_X86_TDX_VM
> >   - Use KVM_X86_PROTECTED_VM for TDX. (If necessary, introduce another type in
> >     the future)
> 
> How would KVM differentiate between software-protected VMs and TDX VMs if we go
> with this option?

Let's introduce new two VM type.  I'm fine with two new VM types.  I had KVM
capability in mind if SEV implementation doesn't like new VM types.
-- 
Isaku Yamahata <isaku.yamahata@...il.com>