linux-kernel - Re: [PATCH v9 09/18] x86/sev: Initialize VGIF for secondary VCPUs for Secure AVIC

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Message-ID: <20250822172820.GSaKiotPxNu-H9rYve@fat_crate.local>
Date: Fri, 22 Aug 2025 19:28:20 +0200
From: Borislav Petkov <bp@...en8.de>
To: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
Cc: 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,
	kirill.shutemov@...ux.intel.com, huibo.wang@....com,
	naveen.rao@....com, francescolavra.fl@...il.com,
	tiala@...rosoft.com
Subject: Re: [PATCH v9 09/18] x86/sev: Initialize VGIF for secondary VCPUs
 for Secure AVIC

On Mon, Aug 11, 2025 at 03:14:35PM +0530, Neeraj Upadhyay wrote:
> Subject: Re: [PATCH v9 09/18] x86/sev: Initialize VGIF for secondary VCPUs for Secure AVIC

"vCPU"

> From: Kishon Vijay Abraham I <kvijayab@....com>
> 
> Secure AVIC requires VGIF to be configured in VMSA. Configure

Please explain in one sentence here for the unenlightened among us what VGIF
is.

Also, I can't find anyhwere in the APM the requirement that SAVIC requires
VGIF. Do we need to document it?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette