linux-kernel - Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump implementation

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130104170751.GB3472@host-192-168-1-59.local.net-space.pl>
Date:	Fri, 4 Jan 2013 18:07:51 +0100
From:	Daniel Kiper <daniel.kiper@...cle.com>
To:	Jan Beulich <JBeulich@...e.com>
Cc:	Andrew Cooper <andrew.cooper3@...rix.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	"maxim.uvarov@...cle.com" <maxim.uvarov@...cle.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"vgoyal@...hat.com" <vgoyal@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump
 implementation

On Fri, Jan 04, 2013 at 02:41:17PM +0000, Jan Beulich wrote:
> >>> On 04.01.13 at 15:22, Daniel Kiper <daniel.kiper@...cle.com> wrote:
> > On Wed, Jan 02, 2013 at 11:26:43AM +0000, Andrew Cooper wrote:
> >> /sbin/kexec can load the "Xen" crash kernel itself by issuing
> >> hypercalls using /dev/xen/privcmd.  This would remove the need for
> >> the dom0 kernel to distinguish between loading a crash kernel for
> >> itself and loading a kernel for Xen.
> >>
> >> Or is this just a silly idea complicating the matter?
> >
> > This is impossible with current Xen kexec/kdump interface.
>
> Why?

Because current KEXEC_CMD_kexec_load does not load kernel
image and other things into Xen memory. It means that it
should live somewhere in dom0 Linux kernel memory.

Daniel
--
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/