linux-kernel - Re: [PATCH 1/1] ACPI: pci_irq, add PRT

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]

Date:	Tue, 24 Aug 2010 17:25:02 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Jiri Slaby <jslaby@...e.cz>, Matthew Garrett <mjg59@...f.ucam.org>,
	lenb@...nel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: [PATCH 1/1] ACPI: pci_irq, add PRT_ quirk for IBM Bartolo

On Tue, Aug 24, 2010 at 2:11 AM, Jiri Slaby <jirislaby@...il.com> wrote:
> On 07/20/2010 11:29 AM, Jiri Slaby wrote:
>> On 07/19/2010 09:19 PM, Robert Hancock wrote:
>>> On Mon, Jul 19, 2010 at 10:29 AM, Jiri Slaby <jslaby@...e.cz> wrote:
>>>>>> I still no point in comparing this to Windows' setup. We can't find out
>>>>>> whether it is quirked or better (without some bug) handled there.
>>>>>
>>>>> Well, you can see if Windows shows IRQ 10 or 11 for that device..
>>>>
>>>> But how can I find out which link it is routed to in Windows? Without
>>>> that information the number is meaningless, no?
>>>
>>> If you look at the pattern of which IRQs are shared by what devices in
>>> Linux and compare it to Windows you can get a good idea. Normally the
>>> assignment of devices to interrupt lines is hard-wired on the
>>> motherboard and doesn't change.
>>
>> Ok, thanks for the hint.
>>
>> What we've found out is that it works on 2.6.27 (with slightly changed
>> configuration).
>
> No, this was a false alarm. It never worked with acpi irq routing on
> older kernels in this HW configuration.
>
> So, to sum up:
> 1) acpi routing enabled (no kernel parameter) => ports 4+5 defunct.
> ports 4+5+6+7 are all on irq 11
>
> 2) acpi routing disabled (acpi=noirq) => all ports working, 4+5 on irq
> 10, 6+7 on irq 11
>
> 3) with the quirk [1] and acpi routing enabled => all ports working,
> ports 4+5 on irq 10, 6+7 on irq 11
>
> 4) in windows => 4+5+6+7 are all on irq 9 and the ports are all working.
>
> Any ideas what this means? Especially point 4)?
>
> [1] http://lkml.org/lkml/2010/6/27/85

I think that's the key question. Is Windows actually using ACPI on
that machine at all? (Check the computer type in Device Manager and
see if it mentions ACPI.)
--
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/