linux-kernel - Re: [RFC 01/14] x86/apic: Add new driver for Secure AVIC

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Message-ID: <7vgwuvktoqzt5ue3zmnjssjqccqahr75osn4lrdnoxrhmqp5f6@p5cy6ypkchdv>
Date: Wed, 9 Oct 2024 14:03:48 +0300
From: "Kirill A. Shutemov" <kirill@...temov.name>
To: Borislav Petkov <bp@...en8.de>
Cc: Neeraj Upadhyay <Neeraj.Upadhyay@....com>, 
	linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com, 
	dave.hansen@...ux.intel.com, Thomas.Lendacky@....com, nikunj@....com, Santosh.Shukla@....com, 
	Vasant.Hegde@....com, Suravee.Suthikulpanit@....com, David.Kaplan@....com, 
	x86@...nel.org, hpa@...or.com, peterz@...radead.org, seanjc@...gle.com, 
	pbonzini@...hat.com, kvm@...r.kernel.org
Subject: Re: [RFC 01/14] x86/apic: Add new driver for Secure AVIC

On Wed, Oct 09, 2024 at 12:42:34PM +0200, Borislav Petkov wrote:
> Do you have a better idea which is cleaner than what we do now?

I would rather convert these three attributes to synthetic X86_FEATUREs
next to X86_FEATURE_TDX_GUEST. I suggested it once.

> Yes yes, cc_platform reports aspects of the coco platform to generic code but
> nothing stops the x86 code from calling those interfaces too, for simplicity
> reasons.

I don't see why it is any simpler than having a synthetic X86_FEATURE.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov