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 PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sun, 9 Nov 2008 10:24:23 +0000 From: Matthew Garrett <mjg@...hat.com> To: Avi Kivity <avi@...hat.com> Cc: Zhao Yakui <yakui.zhao@...el.com>, Len Brown <lenb@...nel.org>, Andrey Borzenkov <arvidjaar@...l.ru>, Ingo Molnar <mingo@...e.hu>, Eduardo Habkost <ehabkost@...hat.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Andrew Morton <akpm@...l.org>, "Rafael J. Wysocki" <rjw@...k.pl>, "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org> Subject: Re: [PATCH 15/15] Revert "x86: default to reboot via ACPI" On Sun, Nov 09, 2008 at 12:11:03PM +0200, Avi Kivity wrote: > Matthew Garrett wrote: > >Hmm. But we're seeing some machines that end up very confused if > >rebooted via ACPI. I guess we need to run Vista on them to find out how > >they behave. What OSI strings did your KVM setup expose? We know that > >Windows changes behaviour under various circumstances depending on which > >OS the firmware requests, so it's almost possible that this is another > >of those cases. > > > > Isn't it the other way around? The firmware changes behavior depending > on how the OS identifies itself? That also happens, yes. > Reboot is a fixed feature IIRC, so it cannot change depending on > identification strings. The ID strings that the firmware requests give a good idea about which operating systems the machine has been tested with. If Vista uses the ACPI method then having the firmware request the OSI string for Vista gives us a good indication that it's safe to use the ACPI method. -- Matthew Garrett | mjg59@...f.ucam.org -- 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/
Powered by blists - more mailing lists