linux-kernel - Re: [PATCH 2/4] x86/amd_nb: add support for newer PCI topologies

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Message-ID: <20181106082759.GA13712@zn.tnic>
Date:   Tue, 6 Nov 2018 09:27:59 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     "Woods, Brian" <Brian.Woods@....com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>,
        Clemens Ladisch <clemens@...isch.de>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Bjorn Helgaas <bhelgaas@...gle.com>, Pu Wen <puwen@...on.cn>,
        Jia Zhang <qianyue.zj@...baba-inc.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: Re: [PATCH 2/4] x86/amd_nb: add support for newer PCI topologies

On Mon, Nov 05, 2018 at 11:32:16PM +0000, Woods, Brian wrote:
> Your understanding is correct.  It's more so that the following DF/SMN
> interface gets mapped correctly.
> 		/*
> 		 * If there are more PCI root devices than data fabric/
> 		 * system management network interfaces, then the (N)
> 		 * PCI roots per DF/SMN interface are functionally the
> 		 * same (for DF/SMN access) and N-1 are redundant.  N-1
> 		 * PCI roots should be skipped per DF/SMN interface so
> 		 * the following DF/SMN interfaces get mapped to
> 		 * correct PCI roots.
> 		 */
> Does that read clearer?

Yap, thanks!

-- 
Regards/Gruss,
    Boris.

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