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Subject: Re: [PATCH 06/11] x86/sev: Replace occurrences of sev_es_active()
 with prot_guest_has()
To:     Tom Lendacky <thomas.lendacky@amd.com>,
        Joerg Roedel <joro@8bytes.org>
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        Andi Kleen <ak@linux.intel.com>,
        Tianyu Lan <Tianyu.Lan@microsoft.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>
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 <YQfMw2FRO5M1osGF@8bytes.org> <934f3e72-49d1-be56-6fa2-f37a02413fb2@amd.com>
From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
Message-ID: <e63c166f-fd56-4aba-3d4f-b2d10051769a@linux.intel.com>
Date:   Mon, 9 Aug 2021 15:08:53 -0700
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On 8/9/21 2:59 PM, Tom Lendacky wrote:
>> Not sure how TDX will handle AP booting, are you sure it needs this
>> special setup as well? Otherwise a check for SEV-ES would be better
>> instead of the generic PATTR_GUEST_PROT_STATE.
> Yes, I'm not sure either. I figure that change can be made, if needed, as
> part of the TDX support.

We don't plan to set PROT_STATE. So it does not affect TDX.
For SMP, we use MADT ACPI table for AP booting.

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer