From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from cavan.codon.org.uk ([2a00:1098:0:80:1000:c:0:1]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VUg1J-0000fJ-24 for kexec@lists.infradead.org; Fri, 11 Oct 2013 16:56:57 +0000 Date: Fri, 11 Oct 2013 17:56:22 +0100 From: Matthew Garrett Subject: Re: kexec: Clearing registers just before jumping into purgatory Message-ID: <20131011165622.GC32133@srcf.ucam.org> References: <20131011110455.GA3626@debian70-amd64.local.net-space.pl> <20131011125206.GA2772@redhat.com> <20131011153727.GA30181@srcf.ucam.org> <20131011154450.GB2772@redhat.com> <20131011154805.GB30181@srcf.ucam.org> <20131011163933.GA31941@srcf.ucam.org> <20131011164400.GA32133@srcf.ucam.org> <20131011165351.GC2772@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20131011165351.GC2772@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: Vivek Goyal Cc: keir@xen.org, Kees Cook , Richard Weinberger , Daniel Kiper , kexec@lists.infradead.org, LKML , xen-devel@lists.xen.org, hbabu@us.ibm.com, "Eric W. Biederman" , jbeulich@suse.com, "H. Peter Anvin" , david.vrabel@citrix.com On Fri, Oct 11, 2013 at 12:53:51PM -0400, Vivek Goyal wrote: > On Fri, Oct 11, 2013 at 05:44:00PM +0100, Matthew Garrett wrote: > > I have /dev/mem and a list of addresses I want to modify. > > Why to boot in a second kernel to modify first kernel's RAM. Why not > do it directly from the first kernel itself (until and unless we want > first kernel to be stopped while doing those modifications). Because the kernel in question won't let me do that. -- Matthew Garrett | mjg59@srcf.ucam.org _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec