linux-kernel - Re: [PATCH v11 018/113] KVM: TDX: create/destroy VM structure

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Message-ID: <Y8nJhO1RhejehJxD@google.com>
Date:   Thu, 19 Jan 2023 22:51:48 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Zhi Wang <zhi.wang.linux@...il.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>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Kai Huang <kai.huang@...el.com>
Subject: Re: [PATCH v11 018/113] KVM: TDX: create/destroy VM structure

On Fri, Jan 20, 2023, Zhi Wang wrote:
> On Tue, 17 Jan 2023 20:56:17 +0000 Sean Christopherson <seanjc@...gle.com> wrote:
> What I would like to clarify is: it would be better to have a mechanism to make sure a
> SEAMCALL can succeed at a certain point (or at least trying to succeed) as the 
> magic number would work like a lottery in reality.

Yep, you and I are in agreement on this point.  Ideally, KVM would be able to
guarantee success and treat TDX_OPERAND_BUSY errors as KVM bugs.