linux-kernel - Re: [PATCH 00/20] x86/tdx: Rewrite TDCALL wrappers

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Date: Fri, 17 May 2024 08:18:29 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
 Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini
 <pbonzini@...hat.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>, "K. Y. Srinivasan" <kys@...rosoft.com>,
 Haiyang Zhang <haiyangz@...rosoft.com>, Wei Liu <wei.liu@...nel.org>,
 Dexuan Cui <decui@...rosoft.com>, Josh Poimboeuf <jpoimboe@...nel.org>,
 Peter Zijlstra <peterz@...radead.org>
Cc: linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org,
 linux-hyperv@...r.kernel.org
Subject: Re: [PATCH 00/20] x86/tdx: Rewrite TDCALL wrappers

On 5/17/24 07:19, Kirill A. Shutemov wrote:
>  arch/x86/boot/compressed/tdx.c    |  32 +---
>  arch/x86/coco/tdx/tdcall.S        | 145 ++++++++++-----
>  arch/x86/coco/tdx/tdx-shared.c    |  26 +--
>  arch/x86/coco/tdx/tdx.c           | 298 ++++++++----------------------
>  arch/x86/hyperv/ivm.c             |  33 +---
>  arch/x86/include/asm/shared/tdx.h | 159 +++++++++++-----
>  arch/x86/include/asm/tdx.h        |   2 +
>  arch/x86/virt/vmx/tdx/tdxcall.S   |  29 +--
>  tools/objtool/noreturns.h         |   2 +-
>  9 files changed, 322 insertions(+), 404 deletions(-)

I was going to grumble about this being a waste of time, but it looks
like this gives smaller binaries and less code.  Looks promising so far!