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Date: Fri, 10 Nov 2023 14:42:31 +0100
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Subject: Re: [PATCH] x86/mm: Check cc_vendor when printing memory encryption
 info
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To: kirill.shutemov@linux.intel.com
Cc: Dave Hansen <dave.hansen@intel.com>,
 Dave Hansen <dave.hansen@linux.intel.com>, Andy Lutomirski
 <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>,
 Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
 Borislav Petkov <bp@alien8.de>, x86@kernel.org,
 "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org,
 Michael Kelley <mhklinux@outlook.com>, Dexuan Cui <decui@microsoft.com>,
 linux-hyperv@vger.kernel.org, stefan.bader@canonical.com,
 tim.gardner@canonical.com, roxana.nicolescu@canonical.com,
 cascardo@canonical.com, kys@microsoft.com, haiyangz@microsoft.com,
 wei.liu@kernel.org, sashal@kernel.org
References: <1699546489-4606-1-git-send-email-jpiotrowski@linux.microsoft.com>
 <16ea75a9-8c94-4665-ae04-32d08aa4ebb2@intel.com>
 <58abbc79-64d4-41f9-9fd2-1de7826fbbf6@linux.microsoft.com>
 <ee9de366-6027-495a-98d9-b8b0cd866bf2@intel.com>
 <df95817a-4859-443a-9ac2-b09f102aff30@linux.microsoft.com>
 <20231110120601.3mbemh6djdazyzgb@box.shutemov.name>
 <6feecf9e-10cb-441f-97a4-65c98e130f7a@linux.microsoft.com>
 <20231110124626.ifq3hqaiqvgpnign@box>
From: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
In-Reply-To: <20231110124626.ifq3hqaiqvgpnign@box>
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On 10/11/2023 13:46, kirill.shutemov@linux.intel.com wrote:
> On Fri, Nov 10, 2023 at 01:27:08PM +0100, Jeremi Piotrowski wrote:
>>> Maybe just remove incorrect info and that's it?
>>>
>>
>> I disagree, other users and I find the print very useful to see which coco
>> platform the kernel is running on and which confidential computing features
>> the kernel detected. I'm willing to fix the code to report correct info.
> 
> For TDX, we already have "tdx: Guest detected" in dmesg. sme_early_init()
> can do something similar.
> 

That doesn't cover TDX guests with TD partitioning on Hyper-V.