linux-kernel - Re: [PATCH] PCI/ASPM: Enable ASPM for links under VMD domain

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Message-ID: <20200827063406.GA13738@infradead.org>
Date:   Thu, 27 Aug 2020 07:34:06 +0100
From:   "hch@...radead.org" <hch@...radead.org>
To:     "Derrick, Jonathan" <jonathan.derrick@...el.com>
Cc:     "kai.heng.feng@...onical.com" <kai.heng.feng@...onical.com>,
        "hch@...radead.org" <hch@...radead.org>,
        "wangxiongfeng2@...wei.com" <wangxiongfeng2@...wei.com>,
        "kw@...ux.com" <kw@...ux.com>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mika.westerberg@...ux.intel.com" <mika.westerberg@...ux.intel.com>,
        "Mario.Limonciello@...l.com" <Mario.Limonciello@...l.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "Huffman, Amber" <amber.huffman@...el.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH] PCI/ASPM: Enable ASPM for links under VMD domain

On Wed, Aug 26, 2020 at 09:43:27PM +0000, Derrick, Jonathan wrote:
> Feel free to review my set to disable the MSI remapping which will make
> it perform as well as direct-attached:
> 
> https://patchwork.kernel.org/project/linux-pci/list/?series=325681

So that then we have to deal with your schemes to make individual
device direct assignment work in a convoluted way?  Please just give us
a disable nob for VMD, which solves _all_ these problems without adding
any.