linux-kernel - Re: [Xen-devel] [PATCH 1/2] Xen acpi pad implement

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: <20121030133720.GA27463@phenom.dumpdata.com>
Date:	Tue, 30 Oct 2012 09:37:22 -0400
From:	Konrad Rzeszutek Wilk <konrad@...nel.org>
To:	"Liu, Jinsong" <jinsong.liu@...el.com>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jan Beulich <jbeulich@...e.com>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>
Subject: Re: [Xen-devel] [PATCH 1/2] Xen acpi pad implement

> > +config XEN_ACPI_PAD_STUB
> > +	bool
> > +	depends on XEN_DOM0 && X86_64 && ACPI
> > +	default n
> > +
> 
> This Kconfig is pointless, if CONFIG_XEN_ACPI_PAD_STUB = n, native pad would successfully registerred, and then mwait #UD (we would revert df88b2d96e36d9a9e325bfcd12eb45671cbbc937, right?). So xen stub logic should unconditionally built-in kernel.


Potentially. Keep in mind that there is no need to built this if the
kernel is not built with ACPI.
.. snip.
> > +subsys_initcall(xen_acpi_pad_stub_init);
> 
> I'm still confused. In this way there are xen-acpi-pad-stub.c and xen-acpi-pad.c, and you want to let xen-acpi-pad loaded as module, right? how can xen-acpi-pad logic work when it was insmoded?

Via the register/unregister calls that this provides? Or does ACPI bus
drivers get immediately called once the call acpi_bus_register_driver?

Or can one 'poke' the 'add' and 'remove' calls so that once the "true"
PAD driver is loaded it will restart the ops->add call?
--
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/