linux-kernel - Re: [PATCH 1/4] x86/tdx: Introduce tdg_vm

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Message-ID: <7fyh7qsx6guodh7vxs4luxrh25gdk4ze4cwlg4q2m7ukyqt5ht@t3a7hz2pohdt>
Date: Mon, 11 Mar 2024 14:00:17 +0200
From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To: 
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
Cc: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, 
	dave.hansen@...el.com, hpa@...or.com, seanjc@...gle.com, ele.reshetova@...el.com, 
	rick.p.edgecombe@...el.com, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] x86/tdx: Introduce tdg_vm_wr()

On Sat, Mar 09, 2024 at 04:02:58PM -0800, Kuppuswamy Sathyanarayanan wrote:
> > +       /* Old value */
> > +       return args.r8;
> 
> Since the update failure will panic, any use for returning the old value?

I don't have any immediate users for the old value, but I can imagine
situation when you need to do something else if your write result in
actual change of setting.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov