linux-kernel - Re: [PATCH v2 0/3] Parse the HEST PCIe AER and set to relevant registers

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Date: Wed, 8 May 2024 17:04:36 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: LeoLiu-oc <LeoLiu-oc@...oxin.com>
Cc: rafael@...nel.org, lenb@...nel.org, james.morse@....com,
	tony.luck@...el.com, bp@...en8.de, bhelgaas@...gle.com,
	robert.moore@...el.com, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	acpica-devel@...ts.linux.dev, CobeChen@...oxin.com,
	TonyWWang@...oxin.com, ErosZhang@...oxin.com, LeoLiu@...oxin.com
Subject: Re: [PATCH v2 0/3] Parse the HEST PCIe AER and set to relevant
 registers

On Mon, Dec 18, 2023 at 11:04:27AM +0800, LeoLiu-oc wrote:
> From: LeoLiuoc <LeoLiu-oc@...oxin.com>
> 
> According to the Section 18.3.2.4, 18.3.2.5 and 18.3.2.6 in ACPI SPEC
> r6.5, the register value form HEST PCI Express AER Structure should be
> written to relevant PCIe Device's AER Capabilities.So the purpose of the
> patch set is to extract register value from HEST PCI Express AER
> structures and program them into PCIe Device's AER registers. Refer to the
> ACPI SPEC r6.5 for the more detailed description. This patch is an
> effective supplement to _HPP/_HPX method when the Firmware does not
> support the _HPP/_HPX method and can be specially configured for the AER
> register of the specific device.
> 
> ---
> 
> v1->v2:
> - Move the definition of structure "hest_parse_aer_info" to file apei.h.

Just noticed that this removes the ACPICA header dependency problem
that Rafael pointed out.  This also applies (with minor offsets) to
v6.9-rc1, so it's not very stale.  We're almost to the v6.9 final
release, so when v6.10-rc1 is tagged, can you rebase to that and
repost this?

I assume you have a platform that uses this.  It would be good to
mention that in the commit log of patches 1 and 3 so we have some idea
of where it's useful and where changes need to be tested.

> LeoLiuoc (3):
>   ACPI/APEI: Add hest_parse_pcie_aer()
>   PCI: Add AER bits #defines for PCIe to PCI/PCI-X Bridge
>   PCI/ACPI: Add pci_acpi_program_hest_aer_params()
> 
>  drivers/acpi/apei/hest.c      | 69 +++++++++++++++++++++++-
>  drivers/pci/pci-acpi.c        | 98 +++++++++++++++++++++++++++++++++++
>  drivers/pci/pci.h             |  9 ++++
>  drivers/pci/probe.c           |  1 +
>  include/acpi/apei.h           | 17 ++++++
>  include/uapi/linux/pci_regs.h |  3 ++
>  6 files changed, 195 insertions(+), 2 deletions(-)
> 
> -- 
> 2.34.1
>