linux-kernel - Re: [PATCH 01/20] x86/tdx: Introduce tdvmcall

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Message-ID: <9cd7f179-673b-4e96-be08-128dc6fb6271@redhat.com>
Date: Fri, 17 May 2024 19:02:25 +0200
From: Paolo Bonzini <pbonzini@...hat.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
 Sean Christopherson <seanjc@...gle.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 01/20] x86/tdx: Introduce tdvmcall_trampoline()

On 5/17/24 16:19, Kirill A. Shutemov wrote:
> The function will be used from inline assembly to handle most TDVMCALL
> cases.

Perhaps add that the calling convention is designed to allow using the 
asm constraints a/b/c/d/S/D and keep the asm blocks simpler?

Paolo