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Date: Tue, 26 Aug 2025 20:09:45 +0200
From: Pali =?utf-8?B?Um9ow6Fy?= <pali@kernel.org>
To: Rostyslav Khudolii <ros@qtec.com>
Cc: Ingo Molnar <mingo@kernel.org>, Yazen Ghannam <yazen.ghannam@amd.com>,
	Borislav Petkov <bp@alien8.de>,
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Subject: Re: PCI IO ECS access is no longer possible for AMD family 17h
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On Tuesday 26 August 2025 17:07:38 Rostyslav Khudolii wrote:
> >
> > Hello Rostyslav, I would like to remind the previous email.
> > I still do not know which bit in D18F4x044 represents the
> > EnableCF8ExtCfg config.
> >
> 
> Hi Pali,
> 
> Sorry for the late reply again. So in D18F4x044:
> - bit 0. EnableCf8ExtCfg. Enable PCI extended configuration register
> access for CFC/CF8
> accesses;
> - bit 1. DisPciCfgReg. Disable CFC/CF8 Accesses to IO space. When set
> to 1, CFC/CF8 accesses are treated as
> PCI IO space accesses and not PCI configuration accesses.
> 
> Unfortunately, I don't know if this also applies to later families.

Thank you very much for the info. I was missing the information about
the bit 0 offset.