linux-kernel - Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi

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: <AANLkTimADCKDJkcAnHQ6uN9vzTWJixB0Dk1YVO8LdI7W@mail.gmail.com>
Date:	Wed, 2 Jun 2010 20:05:29 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	"Justin P. Mattock" <justinmattock@...il.com>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>, x86@...nel.org,
	tglx@...utronix.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi_table.

On Wed, Jun 2, 2010 at 8:00 PM, Justin P. Mattock
<justinmattock@...il.com> wrote:
> On 06/02/2010 06:47 PM, Robert Hancock wrote:
>>
>> On Wed, Jun 2, 2010 at 7:37 PM, Matthew Garrett<mjg59@...f.ucam.org>
>>  wrote:
>>>
>>> On Wed, Jun 02, 2010 at 05:27:22PM -0700, Justin P. Mattock wrote:
>>>>
>>>> On 06/02/2010 05:20 PM, Robert Hancock wrote:
>>>>>
>>>>> #include<unistd.h>
>>>>>
>>>>> int main() {
>>>>>          iopl(3);
>>>>>          outb(2, 0xcf9);
>>>>>          sleep(1);
>>>>>          outb(6, 0xcf9);
>>>>>          return 0;
>>>>> }
>>>>>
>>>>> That's basically what PCI reboot does.
>>>>
>>>> the above code reboot's the machine as it should..
>>>> I can look at that(need to take a break first though)
>>>> and see..
>>>
>>> That's pretty infuriating. The ACPI-provided definition doesn't work,
>>> and there's no ACPI mechanism for expressing the more complex cf9
>>> behaviour. Windows doesn't appear to special case this, so we're
>>> probably left trying to figure out why the keyboard controller method
>>> doesn't work. Sigh.
>>
>> Do these Macs even have a PC keyboard controller? A recent thread on
>> PS/2 keyboard/mouse controller probing suggests they may not..
>>
>> Justin, what happens if you try the simple outb(6, 0xcf9) test program
>> multiple times, does that do anything?
>>
>
>
> this reboots the system
>
>
> int main() {
>           iopl(3);
>           outb(6, 0xcf9);
>           return 0;
> }

On a single try, or multiple times? (You tried that one before once
and it didn't work, right?)
--
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/