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Date:   Tue, 13 Jul 2021 21:02:58 +0000
From:   Sean Christopherson <seanjc@google.com>
To:     Paolo Bonzini <pbonzini@redhat.com>
Cc:     isaku.yamahata@intel.com, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H . Peter Anvin" <hpa@zytor.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>, erdemaktas@google.com,
        Connor Kuehl <ckuehl@redhat.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        isaku.yamahata@gmail.com,
        Sean Christopherson <sean.j.christopherson@intel.com>
Subject: Re: [RFC PATCH v2 51/69] KVM: x86/mmu: Allow per-VM override of the
 TDP max page level
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References: <cover.1625186503.git.isaku.yamahata@intel.com>
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 <89d1ff17-dc48-0f39-257a-4cf11a98f435@redhat.com>
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On Tue, Jul 06, 2021, Paolo Bonzini wrote:
> On 03/07/21 00:04, isaku.yamahata@intel.com wrote:
> > From: Sean Christopherson <sean.j.christopherson@intel.com>
> > 
> > TODO: This is tentative patch.  Support large page and delete this patch.
> > 
> > Allow TDX to effectively disable large pages, as SEPT will initially
> > support only 4k pages.

...

> Seems good enough for now.

Looks like SNP needs a dynamic check, i.e. a kvm_x86_ops hook, to handle an edge
case in the RMP.  That's probably the better route given that this is a short-term
hack (hopefully :-D).