linux-kernel - RE: Bug report: the extended PCI config space is missed with 6.2-rc2

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Date:   Fri, 6 Jan 2023 22:30:44 +0000
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
CC:     "Williams, Dan J" <dan.j.williams@...el.com>,
        "Liang, Kan" <kan.liang@...ux.intel.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>,
        "kernelorg@...ead.fr" <kernelorg@...ead.fr>,
        "kjhambrick@...il.com" <kjhambrick@...il.com>,
        "2lprbe78@...k.com" <2lprbe78@...k.com>,
        "nicholas.johnson-opensource@...look.com.au" 
        <nicholas.johnson-opensource@...look.com.au>,
        "benoitg@...us.ca" <benoitg@...us.ca>,
        "mika.westerberg@...ux.intel.com" <mika.westerberg@...ux.intel.com>,
        "wse@...edocomputers.com" <wse@...edocomputers.com>,
        "mumblingdrunkard@...tonmail.com" <mumblingdrunkard@...tonmail.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Box, David E" <david.e.box@...el.com>,
        "Sun, Yunying" <yunying.sun@...el.com>,
        "Jiang, Dave" <dave.jiang@...el.com>
Subject: RE: Bug report: the extended PCI config space is missed with 6.2-rc2

> Thanks!  Ah, off-by-one error because e820__mapped_all() expects
> "[start, end)" which means is_acpi_reserved() and is_efi_mmio() must
> use the same, and I was thinking "[start, end]" like a struct
> resource.
>
> The below should work better.

Applied in place of earlier patch.

The basic MMCONFIG messages look better:

$ dmesg | grep MMCONFIG
[   12.985055] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0x80000000-0x8fffffff] (base 0x80000000)
[   13.078050] PCI: not using MMCONFIG
[   13.666053] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0x80000000-0x8fffffff] (base 0x80000000)
[   13.795049] PCI: MMCONFIG at [mem 0x80000000-0x8fffffff] reserved in ACPI motherboard resources or EFI

Full dmesg attached.

-Tony
 

Download attachment "dmesg.gz" of type "application/x-gzip" (36852 bytes)