linux-kernel - Re: linux-next: Tree for Sep 30 (i386 non-SMP non-APIC w/ IRQ

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Message-ID: <YztR/qfmoFKND1ot@zn.tnic>
Date:   Mon, 3 Oct 2022 23:19:58 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Marc Zyngier <maz@...nel.org>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>, broonie@...nel.org,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        x86@...nel.org
Subject: Re: linux-next: Tree for Sep 30 (i386 non-SMP non-APIC w/
 IRQ_DOMAIN: build errors)

On Mon, Oct 03, 2022 at 07:26:29PM +0100, Marc Zyngier wrote:
> Can x86 practically deal with MSIs without the APIC? If not, we should
> instead find a way to forbid MSIs when APIC isn't selected. Or make
> APIC support mandatory.

Well, you need the local APIC in order to send MSIs, that's why
X86_LOCAL_APIC depends on PCI_MSI.

I'll have a look at that .config tomorrow.

Thx.

-- 
Regards/Gruss,
    Boris.

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