Return-path: Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]) by bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux)) id 1Jwynb-0004xe-7H for kexec@lists.infradead.org; Fri, 16 May 2008 12:12:35 +0000 Date: Fri, 16 May 2008 14:13:28 +0200 From: Pavel Machek Subject: Re: [PATCH -mm] kexec jump -v9 Message-ID: <20080516121328.GD22264@elf.ucw.cz> References: <1204773188.4707.109.camel@caritas-dev.intel.com> <20080514205204.GJ30469@redhat.com> <1210818762.23707.102.camel@caritas-dev.intel.com> <20080515200923.GC9718@redhat.com> <1210902514.23707.161.camel@caritas-dev.intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1210902514.23707.161.camel@caritas-dev.intel.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-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: "Huang, Ying" Cc: nigel@nigel.suspend2.net, Kexec Mailing List , linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , "Eric W. Biederman" , Andrew Morton , linux-pm@lists.linux-foundation.org, Vivek Goyal On Fri 2008-05-16 09:48:34, Huang, Ying wrote: > On Thu, 2008-05-15 at 16:09 -0400, Vivek Goyal wrote: > [...] > > Ok, You want to make BIOS calls. We already do that using vm86 mode and > > use bios real mode interrupts. So why do we need this interface? Or, IOW, > > how is this interface better? > > It can call code in 32-bit physical mode in addition to real mode. So It > can be used to call EFI runtime service, especially call EFI 64 runtime > service under 32-bit kernel or vice versa. > > The main purpose of kexec jump is for hibernation. But I think if the > effort is small, why not support general 32-bit physical mode code call > at same time. I believe we should focus on kexecing kernels, first. Only way to prove the effort is small is by having small followup patch, and that needs the two patches separated... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec