From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Daniel Kiper <daniel.kiper@oracle.com>,
"x86@kernel.org" <x86@kernel.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
"mingo@redhat.com" <mingo@redhat.com>,
Jan Beulich <JBeulich@suse.com>, "H. Peter Anvin" <hpa@zytor.com>,
"maxim.uvarov@oracle.com" <maxim.uvarov@oracle.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"vgoyal@redhat.com" <vgoyal@redhat.com>
Subject: Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump implementation
Date: Fri, 11 Jan 2013 11:55:06 -0500 [thread overview]
Message-ID: <20130111165506.GD25620@phenom.dumpdata.com> (raw)
In-Reply-To: <87ehhsqrpr.fsf@xmission.com>
On Thu, Jan 10, 2013 at 08:16:48PM -0800, Eric W. Biederman wrote:
> Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> writes:
>
> > On Mon, Jan 07, 2013 at 01:34:04PM +0100, Daniel Kiper wrote:
> >> I think that new kexec hypercall function should mimics kexec syscall.
> >> It means that all arguments passed to hypercall should have same types
> >> if it is possible or if it is not possible then conversion should be done
> >> in very easy way. Additionally, I think that one call of new hypercall
> >> load function should load all needed thinks in right place and
> >> return relevant status. Last but not least, new functionality should
> >
> > We are not restricted to just _one_ hypercall. And this loading
> > thing could be similar to the micrcode hypercall - which just points
> > to a virtual address along with the length - and says 'load me'.
> >
> >> be available through /dev/xen/privcmd or directly from kernel without
> >> bigger effort.
> >
> > Perhaps we should have a email thread on xen-devel where we hash out
> > some ideas. Eric, would you be OK included on this - it would make
> > sense for this mechanism to be as future-proof as possible - and I am not
> > sure what your plans for kexec are in the future?
>
> The basic kexec interface is.
>
> load ranges of virtual addresses physical addresses.
> jump to the physical address with identity mapped page tables.
>
> There are a few flags to allow for different usage scenarios like
> kexec on panic vs normal kexec.
And there is nothing fancy to be done for EFI and SecureBoot? Or is
that something that the kernel has to handle on its own (so somehow
passing some certificates to somewhere).
>
> It is very very simple and very extensible. All of the weird glue
> happens in userspace.
>
> Eric
next prev parent reply other threads:[~2013-01-11 16:55 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-27 2:18 [PATCH v3 00/11] xen: Initial kexec/kdump implementation Daniel Kiper
[not found] ` <1356574740-6806-1-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 01/11] kexec: introduce kexec firmware support Daniel Kiper
[not found] ` <1356574740-6806-2-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE Daniel Kiper
[not found] ` <1356574740-6806-3-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 03/11] xen: Introduce architecture independent data for kexec/kdump Daniel Kiper
[not found] ` <1356574740-6806-4-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 04/11] x86/xen: Introduce architecture dependent " Daniel Kiper
[not found] ` <1356574740-6806-5-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 05/11] x86/xen: Register resources required by kexec-tools Daniel Kiper
[not found] ` <1356574740-6806-6-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 06/11] x86/xen: Add i386 kexec/kdump implementation Daniel Kiper
[not found] ` <1356574740-6806-7-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 07/11] x86/xen: Add x86_64 " Daniel Kiper
[not found] ` <1356574740-6806-8-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 08/11] x86/xen: Add kexec/kdump Kconfig and makefile rules Daniel Kiper
[not found] ` <1356574740-6806-9-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks Daniel Kiper
[not found] ` <1356574740-6806-10-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 10/11] drivers/xen: Export vmcoreinfo through sysfs Daniel Kiper
[not found] ` <1356574740-6806-11-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:19 ` [PATCH v3 11/11] x86: Add Xen kexec control code size check to linker script Daniel Kiper
2012-12-27 18:53 ` [PATCH v3 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks H. Peter Anvin
2012-12-27 4:00 ` [PATCH v3 06/11] x86/xen: Add i386 kexec/kdump implementation H. Peter Anvin
2012-12-27 3:33 ` [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE H. Peter Anvin
2013-01-03 9:34 ` Jan Beulich
[not found] ` <50E55ECF02000078000B2A13@nat28.tlf.novell.com>
2013-01-04 15:15 ` Daniel Kiper
[not found] ` <20130104151542.GD3346@host-192-168-1-59.local.net-space.pl>
2013-01-04 16:12 ` Jan Beulich
[not found] ` <50E70D8002000078000B336D@nat28.tlf.novell.com>
2013-01-04 17:25 ` Daniel Kiper
[not found] ` <20130104172538.GC3472@host-192-168-1-59.local.net-space.pl>
2013-01-07 9:48 ` Jan Beulich
[not found] ` <50EAA7F402000078000B34C3@nat28.tlf.novell.com>
2013-01-07 12:52 ` Daniel Kiper
[not found] ` <20130107125211.GB2927@host-192-168-1-59.local.net-space.pl>
2013-01-07 13:05 ` Jan Beulich
[not found] ` <50EAD61602000078000B36A0@nat28.tlf.novell.com>
2013-01-09 18:42 ` Daniel Kiper
2013-01-10 14:07 ` David Vrabel
[not found] ` <50EECB23.4090603@citrix.com>
2013-01-11 13:36 ` Daniel Kiper
2012-12-27 4:46 ` [PATCH v3 01/11] kexec: introduce kexec firmware support Eric W. Biederman
2012-12-27 4:02 ` [PATCH v3 00/11] xen: Initial kexec/kdump implementation H. Peter Anvin
2012-12-27 7:53 ` Eric W. Biederman
2012-12-27 14:18 ` Andrew Cooper
2012-12-27 18:02 ` Eric W. Biederman
2013-01-02 11:26 ` [Xen-devel] " Andrew Cooper
2013-01-02 11:47 ` Eric W. Biederman
2013-01-03 9:31 ` Jan Beulich
2013-01-04 14:22 ` Daniel Kiper
2013-01-04 14:34 ` Konrad Rzeszutek Wilk
2013-01-04 14:34 ` Ian Campbell
2013-01-04 14:38 ` David Vrabel
2013-01-04 17:01 ` Daniel Kiper
2013-01-10 14:19 ` David Vrabel
2013-01-11 13:22 ` Daniel Kiper
2013-01-11 15:22 ` David Vrabel
2013-01-11 17:34 ` Daniel Kiper
2013-01-11 20:05 ` Eric W. Biederman
2013-01-04 14:41 ` Jan Beulich
[not found] ` <50E6F81D02000078000B3245-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
2013-01-04 17:07 ` Daniel Kiper
2013-01-04 19:11 ` Konrad Rzeszutek Wilk
[not found] ` <20130104191146.GC6721-6K5HmflnPlqSPmnEAIUT9EEOCMrvLtNR@public.gmane.org>
2013-01-07 10:25 ` Ian Campbell
2013-01-07 10:46 ` Andrew Cooper
2013-01-07 10:54 ` Ian Campbell
2013-01-07 12:34 ` Daniel Kiper
[not found] ` <20130107123404.GA2927-UojuW/CpjwpdUOLzJiIvSsFoITBeLw/klGfBN0aaEZ+lPcVs/6D9LQ@public.gmane.org>
2013-01-07 13:49 ` Ian Campbell
2013-01-11 13:47 ` Daniel Kiper
2013-01-07 16:20 ` Konrad Rzeszutek Wilk
2013-01-11 4:16 ` Eric W. Biederman
2013-01-11 16:55 ` Konrad Rzeszutek Wilk [this message]
2013-01-11 20:26 ` H. Peter Anvin
2013-01-11 20:43 ` Vivek Goyal
2013-01-11 20:26 ` Eric W. Biederman
2013-01-11 20:52 ` Vivek Goyal
[not found] ` <20130111205232.GC17126-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-11 21:03 ` H. Peter Anvin
[not found] ` <50F07E2D.6010602-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-01-11 21:08 ` Vivek Goyal
2013-01-11 21:14 ` H. Peter Anvin
[not found] ` <50DC58C4.3000307-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org>
2013-01-02 15:27 ` Ian Campbell
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