linux-kernel - Re: [PATCH] Add support for turning PCIe ECRC on or off

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: <87ljqikz0w.fsf@basil.nowhere.org>
Date:	Fri, 03 Apr 2009 08:54:39 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Andrew Patterson <andrew.patterson@...com>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	jbarnes@...tuousgeek.org
Subject: Re: [PATCH] Add support for turning PCIe ECRC on or off

Andrew Patterson <andrew.patterson@...com> writes:

> Add support for turning PCIe ECRC on or off
>
> Adds support for PCI Express transaction layer end-to-end CRC checking
> (ECRC).  This patch will enable/disable ECRC checking by setting/clearing
> the ECRC Check Enable and/or ECRC Generation Enable bits for devices that
> support ECRC.
>
> The ECRC setting is controlled by the "pcie_ecrc=" command-line option. If
> this option is not set or is set to 'default", the enable and generation
> bits are left in whatever state that firmware/BIOS sets them to.  The
> "off" setting turns them off, and the "on" option turns them on (if the
> device supports it).

Can you please expand a little bit on your motvation? Why does the kernel
need to set that over the firmware? And why does it need to be a boot
parameter vs some sysfs file?

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/