linux-kernel - Re: [PATCH] x86/tdx: Dump attributes and TD

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Message-ID: <masdihuund2tead2a5mwi43gzsc65fylugebz4vdayyaxqzklt@2vqq4qu36mno>
Date: Thu, 5 Dec 2024 10:59:51 +0200
From: "Kirill A. Shutemov" <kirill@...temov.name>
To: Dave Hansen <dave.hansen@...el.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, 
	Dave Hansen <dave.hansen@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, 
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, x86@...nel.org, 
	"H. Peter Anvin" <hpa@...or.com>, linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/tdx: Dump attributes and TD_CTLS on boot

On Wed, Dec 04, 2024 at 10:41:17AM -0800, Dave Hansen wrote:
> On 12/1/24 23:24, Kirill A. Shutemov wrote:
> > Dump TD configuration on boot. Attributes and TD_CTLS define TD
> > behavior. This information is useful for tracking down bugs.
> 
> What's actually getting dumped? How noisy is it?
> 
> Could you provide real examples from a real system, please?

[    0.000000] tdx: Guest detected
[    0.000000] tdx: Attributes: SEPT_VE_DISABLE
[    0.000000] tdx: TD_CTLS: PENDING_VE_DISABLE ENUM_TOPOLOGY VIRT_CPUID2 REDUCE_VE

-- 
  Kiryl Shutsemau / Kirill A. Shutemov