linux-kernel - Re: "invalid agent type: 1" in acpi/ghes, cper: Recognize and cache CXL Protocol errors

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Message-ID: <688790d087cde_119681005b@dwillia2-mobl4.notmuch>
Date: Mon, 28 Jul 2025 08:01:36 -0700
From: <dan.j.williams@...el.com>
To: Marc Herbert <marc.herbert@...ux.intel.com>, Smita Koralahalli
	<Smita.KoralahalliChannabasappa@....com>, <linux-efi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-cxl@...r.kernel.org>
CC: Ard Biesheuvel <ardb@...nel.org>, Alison Schofield
	<alison.schofield@...el.com>, Vishal Verma <vishal.l.verma@...el.com>, "Ira
 Weiny" <ira.weiny@...el.com>, Dan Williams <dan.j.williams@...el.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>, Yazen Ghannam
	<yazen.ghannam@....com>, Terry Bowman <terry.bowman@....com>, Dave Jiang
	<dave.jiang@...el.com>, <tony.luck@...el.com>, Gregory Price
	<gourry@...rry.net>
Subject: Re: "invalid agent type: 1" in acpi/ghes, cper: Recognize and cache
 CXL Protocol errors

Marc Herbert wrote:
> On 2025-07-22 12:24, Marc Herbert wrote:
> > Hi Smita,
> > 
> >   The code below triggers the error "invalid agent type: 1" in Intel
> > validation (internal issue 15018133056)
> 
> The same test case also triggers the other, warning message "CXL CPER no
> device serial number".
> 
> I heard that "device" serial numbers are only for... devices and that
> even then it's not always mandatory. So maybe that other message should
> be downgraded from warning to the "info" level?

Agree. Care to send a fixup series?

This is a benefit / endorsement of your test updates [1] to catch
unexpected warn/err.

[1]: http://lore.kernel.org/20250611235256.3866724-1-marc.herbert@linux.intel.com