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Date: Tue, 12 Oct 2021 14:15:54 +0200
From: "Gerd Hoffmann" <kraxel@redhat.com>
To: devel@edk2.groups.io, min.m.xu@intel.com
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>,
	Jordan Justen <jordan.l.justen@intel.com>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Erdem Aktas <erdemaktas@google.com>,
	James Bottomley <jejb@linux.ibm.com>,
	Jiewen Yao <jiewen.yao@intel.com>,
	Tom Lendacky <thomas.lendacky@amd.com>
Subject: Re: [edk2-devel] [PATCH V2 27/28] OvmfPkg: Update IoMmuDxe to support TDX
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  Hi,

> +#define IO_MMU_LEGACY  0x0
> +#define IO_MMU_SEV     0x01
> +#define IO_MMU_TDX     0x02
> +
> +UINTN mIoMmuType = IO_MMU_LEGACY;

Yet another place where you should be able to just use the
ConfidentialComputing PCD.

take care,
  Gerd