linux-kernel - Re: [PATCH v9 10/18] x86/apic: Add support to send NMI IPI for Secure AVIC

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Message-ID: <20250825150656.GXaKx8ENWi4X5RN2RA@fat_crate.local>
Date: Mon, 25 Aug 2025 17:06:56 +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 10/18] x86/apic: Add support to send NMI IPI for
 Secure AVIC

On Mon, Aug 11, 2025 at 03:14:36PM +0530, Neeraj Upadhyay wrote:
> Secure AVIC has introduced a new field in the APIC backing page
> "NmiReq" that has to be set by the guest to request a NMI IPI
> through APIC_ICR write.
> 
> Add support to set NmiReq appropriately to send NMI IPI.
> 
> Sending NMI IPI also requires Virtual NMI feature to be enabled
> in VINTRL_CTRL field in the VMSA. However, this would be added by
> a later commit after adding support for injecting NMI from the
> hypervisor.

So drop this whole paragraph. No need to mention that here.

-- 
Regards/Gruss,
    Boris.

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