linux-kernel - Re: [PATCH v11 09/23] PCI/AER: Report CXL or PCIe bus error type in trace logging

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aK6101l5vMZA3MUs@wunner.de>
Date: Wed, 27 Aug 2025 09:37:55 +0200
From: Lukas Wunner <lukas@...ner.de>
To: Terry Bowman <terry.bowman@....com>
Cc: dave@...olabs.net, jonathan.cameron@...wei.com, dave.jiang@...el.com,
	alison.schofield@...el.com, dan.j.williams@...el.com,
	bhelgaas@...gle.com, shiju.jose@...wei.com, ming.li@...omail.com,
	Smita.KoralahalliChannabasappa@....com, rrichter@....com,
	dan.carpenter@...aro.org, PradeepVineshReddy.Kodamati@....com,
	Benjamin.Cheatham@....com,
	sathyanarayanan.kuppuswamy@...ux.intel.com,
	linux-cxl@...r.kernel.org, alucerop@....com, ira.weiny@...el.com,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH v11 09/23] PCI/AER: Report CXL or PCIe bus error type in
 trace logging

On Tue, Aug 26, 2025 at 08:35:24PM -0500, Terry Bowman wrote:
> The AER service driver and aer_event tracing currently log 'PCIe Bus Type'
> for all errors. Update the driver and aer_event tracing to log 'CXL Bus
> Type' for CXL device errors.
> 
> This requires the AER can identify and distinguish between PCIe errors and
> CXL errors.
> 
> Introduce boolean 'is_cxl' to 'struct aer_err_info'. Add assignment in
> aer_get_device_error_info() and pci_print_aer().
> 
> Update the aer_event trace routine to accept a bus type string parameter.

aer_print_error() has a pointer to the struct pci_dev and you've added
an is_cxl bit to that struct in the preceding patch.

Is there a reason why you can't just use that dev->is_cxl bit, in lieu of
adding another is_cxl bit to struct aer_err_info?

If so, please document it in a code comment or at least in the commit
message.  If there isn't, please use dev->is_cxl.

Thanks,

Lukas