linux-kernel - Re: [PATCH v7 9/9] ACPI: APEI: EINJ: Update the documentation for EINJv2 support

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Message-ID: <aDo6q74ADqfUXjO3@agluck-desk3>
Date: Fri, 30 May 2025 16:09:31 -0700
From: "Luck, Tony" <tony.luck@...el.com>
To: Borislav Petkov <bp@...en8.de>
Cc: Zaid Alali <zaidal@...amperecomputing.com>, rafael@...nel.org,
	lenb@...nel.org, james.morse@....com, robert.moore@...el.com,
	Jonathan.Cameron@...wei.com, ira.weiny@...el.com,
	Benjamin.Cheatham@....com, dan.j.williams@...el.com, arnd@...db.de,
	Avadhut.Naik@....com, john.allen@....com,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	acpica-devel@...ts.linux.dev
Subject: Re: [PATCH v7 9/9] ACPI: APEI: EINJ: Update the documentation for
 EINJv2 support

On Fri, May 30, 2025 at 01:52:41PM -0700, Luck, Tony wrote:
> On Fri, May 30, 2025 at 12:27:11PM +0200, Borislav Petkov wrote:
> > On Tue, May 06, 2025 at 02:38:13PM -0700, Zaid Alali wrote:
> There isn't a fancy "debugfs_create_x128_le()" helper to manage these
> 128-bit little endian numbers. So I've coded with the basic building
> blocks (though using copy_from_user() and copy_to_user() feels like
> back in the stone age). If there some helpers that I missed I'd be
> happy to see that part simplified.

simple_read_from_buffer() and simple_write_to_buffer() may be the
helpers that I didn't spot earlier.

-Tony