linux-kernel - Re: [PATCH] x86/tdx: Use pg_level in TDX APIs, not the TDX-Module's 0-based level

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Message-ID: <aXDHR2dS8fW_Xxir@thinkstation>
Date: Wed, 21 Jan 2026 12:32:27 +0000
From: Kiryl Shutsemau <kas@...nel.org>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Thomas Gleixner <tglx@...nel.org>, Ingo Molnar <mingo@...hat.com>, 
	Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
	Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org, linux-coco@...ts.linux.dev, 
	kvm@...r.kernel.org, Kai Huang <kai.huang@...el.com>, 
	Rick Edgecombe <rick.p.edgecombe@...el.com>, Yan Zhao <yan.y.zhao@...el.com>, 
	Vishal Annapurve <vannapurve@...gle.com>, Ackerley Tng <ackerleytng@...gle.com>
Subject: Re: [PATCH] x86/tdx: Use pg_level in TDX APIs, not the TDX-Module's
 0-based level

On Tue, Jan 20, 2026 at 12:39:37PM -0800, Sean Christopherson wrote:
> Rework the TDX APIs to take the kernel's 1-based pg_level enum, not the
> TDX-Module's 0-based level.  The APIs are _kernel_ APIs, not TDX-Module
> APIs, and the kernel (and KVM) uses "enum pg_level" literally everywhere.
> 
> Using "enum pg_level" eliminates ambiguity when looking at the APIs (it's
> NOT clear that "int level" refers to the TDX-Module's level), and will
> allow for using existing helpers like page_level_size() when support for
> hugepages is added to the S-EPT APIs.
> 
> No functional change intended.
> 
> Cc: Kai Huang <kai.huang@...el.com>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: Rick Edgecombe <rick.p.edgecombe@...el.com>
> Cc: Yan Zhao <yan.y.zhao@...el.com>
> Cc: Vishal Annapurve <vannapurve@...gle.com>
> Cc: Ackerley Tng <ackerleytng@...gle.com>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Acked-by: Kiryl Shutsemau <kas@...nel.org>

-- 
  Kiryl Shutsemau / Kirill A. Shutemov