linux-kernel - Re: [PATCH 2/2] x86/pci: Treat EfiMemoryMappedIO as reservation of ECAM space

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Message-ID: <cb450c07-2df2-45a7-a77a-25ce2a0a18bc@leemhuis.info>
Date:   Wed, 6 Dec 2023 12:54:14 +0100
From:   "Linux regression tracking #update (Thorsten Leemhuis)" 
        <regressions@...mhuis.info>
To:     linux-pci@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] x86/pci: Treat EfiMemoryMappedIO as reservation of
 ECAM space

[TLDR: This mail in primarily relevant for Linux kernel regression
tracking. See link in footer if these mails annoy you.]

On 12.10.23 17:33, Tomasz Pala wrote:
> Hello,
> 
> On Tue, Jan 10, 2023 at 12:02:43 -0600, Bjorn Helgaas wrote:
> 
>> Normally we reject ECAM space unless it is reported as reserved in the E820
>> table or via a PNP0C02 _CRS method (PCI Firmware, r3.3, sec 4.1.2).  This
>> means PCI extended config space (offsets 0x100-0xfff) may not be accessible.
> 
> I'm still having a problem initializing ixgbe NICs with pristine 6.5.7 kernel.

#regzbot fix: x86/pci: Reserve ECAM if BIOS didn't include it in PNP0C02
_CRS
#regzbot ignore-activity

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
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