From: "Pali Rohár" <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>,
"Filip Štědronský" <p@regnarg.cz>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
x86@kernel.org
Subject: Re: PCI IO ECS access is no longer possible for AMD family 17h
Date: Tue, 15 Jul 2025 19:06:37 +0200 [thread overview]
Message-ID: <20250715170637.mtplp7s73zwdbjay@pali> (raw)
In-Reply-To: <CAJDH93vTBkk7a5D0nOgNfBEjGfMhKbFnUWaQ1r6NDLqm0j3kOA@mail.gmail.com>
On Tuesday 15 July 2025 12:43:16 Rostyslav Khudolii wrote:
> >
> > Yes, I would like to get access to ECS via CF8/CFC direct IO for
> > debugging purposes, even though MMCFG is enabled and used.
> >
> > If you can send me a simple patch or any sample / idea how to do it,
> > I would be very happy. I was not able to figure out how to enable ECS
> > over CF8/CFC.
> >
>
> Hi Pali,
> I'm sorry for the late reply.
>
> If I understand your request correctly, all you need to do is patch
> the pci_enable_pci_io_ecs() function to use
> the different register to set EnableCF8ExtCfg: D18F4x044.
>
> Regards,
> Ros
Hello, thank you for information.
Just I would like to know, where did you find information that the
EnableCF8ExtCfg register was moved to D18F4x044? It is documented in
some AMD specification?
I did not find anything regarding this change.
Pali
next prev parent reply other threads:[~2025-07-15 17:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-16 13:15 PCI IO ECS access is no longer possible for AMD family 17h Rostyslav Khudolii
2024-12-19 11:23 ` Borislav Petkov
2024-12-19 16:44 ` Yazen Ghannam
2024-12-27 11:07 ` Rostyslav Khudolii
2025-02-26 15:07 ` Ingo Molnar
2025-03-03 9:21 ` Rostyslav Khudolii
2025-03-03 11:32 ` Ingo Molnar
2025-03-03 12:20 ` Rostyslav Khudolii
2025-03-03 18:42 ` Yazen Ghannam
2025-03-04 7:39 ` Rostyslav Khudolii
2025-03-04 15:26 ` Yazen Ghannam
2025-06-21 14:50 ` Pali Rohár
2025-07-15 10:43 ` Rostyslav Khudolii
2025-07-15 17:06 ` Pali Rohár [this message]
2025-07-16 8:03 ` Rostyslav Khudolii
2025-07-16 18:13 ` Pali Rohár
2025-08-11 17:57 ` Pali Rohár
2025-08-26 15:07 ` Rostyslav Khudolii
2025-08-26 18:09 ` Pali Rohár
2025-01-22 22:13 ` Pali Rohár
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