From: Vivek Goyal <vgoyal@redhat.com>
To: "Huang, Ying" <ying.huang@intel.com>
Cc: nigel@nigel.suspend2.net,
Kexec Mailing List <kexec@lists.infradead.org>,
linux-kernel@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Pavel Machek <pavel@ucw.cz>,
Andrew Morton <akpm@linux-foundation.org>,
linux-pm@lists.linux-foundation.org
Subject: Re: [PATCH -mm] kexec jump -v9
Date: Thu, 15 May 2008 16:09:23 -0400 [thread overview]
Message-ID: <20080515200923.GC9718@redhat.com> (raw)
In-Reply-To: <1210818762.23707.102.camel@caritas-dev.intel.com>
[..]
> > > +2:
> > > + call *%edx
> >
> > > + movl %edi, %edx
> > > + popl %edi
> > > + pushl %edx
> > > + jmp 2b
> > > +
> >
> > What does above piece of code do? Looks like redundant for switching
> > between the kernels? After call *%edx, we never return here. Instead
> > we come back to "kexec_jump_back_entry"?
>
> For switching between the kernels, this is redundant. Originally another
> feature of kexec jump is to call some code in physical mode. This is
> used to provide a C ABI to called code.
>
Hi Huang,
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?
Do you have something in mind where/how are you going to use it?
Thanks
Vivek
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: "Huang, Ying" <ying.huang@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Pavel Machek <pavel@ucw.cz>,
nigel@nigel.suspend2.net, "Rafael J. Wysocki" <rjw@sisk.pl>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org,
linux-pm@lists.linux-foundation.org,
Kexec Mailing List <kexec@lists.infradead.org>
Subject: Re: [PATCH -mm] kexec jump -v9
Date: Thu, 15 May 2008 16:09:23 -0400 [thread overview]
Message-ID: <20080515200923.GC9718@redhat.com> (raw)
In-Reply-To: <1210818762.23707.102.camel@caritas-dev.intel.com>
[..]
> > > +2:
> > > + call *%edx
> >
> > > + movl %edi, %edx
> > > + popl %edi
> > > + pushl %edx
> > > + jmp 2b
> > > +
> >
> > What does above piece of code do? Looks like redundant for switching
> > between the kernels? After call *%edx, we never return here. Instead
> > we come back to "kexec_jump_back_entry"?
>
> For switching between the kernels, this is redundant. Originally another
> feature of kexec jump is to call some code in physical mode. This is
> used to provide a C ABI to called code.
>
Hi Huang,
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?
Do you have something in mind where/how are you going to use it?
Thanks
Vivek
next prev parent reply other threads:[~2008-05-15 20:10 UTC|newest]
Thread overview: 254+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-06 3:13 [PATCH -mm] kexec jump -v9 Huang, Ying
2008-03-06 3:13 ` Huang, Ying
2008-03-11 21:10 ` Vivek Goyal
2008-03-11 21:10 ` Vivek Goyal
2008-03-11 21:59 ` Nigel Cunningham
2008-03-11 21:59 ` Nigel Cunningham
2008-03-11 23:55 ` Eric W. Biederman
2008-03-11 23:55 ` Eric W. Biederman
2008-03-11 23:55 ` Eric W. Biederman
2008-03-12 0:09 ` david
2008-03-12 0:09 ` david
2008-03-12 0:09 ` david
2008-03-12 2:14 ` Huang, Ying
2008-03-12 2:14 ` Huang, Ying
2008-03-12 2:14 ` Huang, Ying
2008-03-12 18:53 ` Vivek Goyal
2008-03-12 18:53 ` Vivek Goyal
2008-03-13 0:01 ` Eric W. Biederman
2008-03-13 0:01 ` Eric W. Biederman
2008-03-13 0:01 ` Eric W. Biederman
2008-03-12 18:53 ` Vivek Goyal
2008-03-11 21:59 ` Nigel Cunningham
2008-03-11 22:18 ` Rafael J. Wysocki
2008-03-11 22:18 ` Rafael J. Wysocki
2008-03-12 2:02 ` Eric W. Biederman
2008-03-12 2:02 ` Eric W. Biederman
2008-03-12 2:02 ` Eric W. Biederman
2008-03-12 2:26 ` Huang, Ying
2008-03-12 2:26 ` Huang, Ying
2008-03-12 2:26 ` Huang, Ying
2008-03-11 22:18 ` Rafael J. Wysocki
2008-03-11 23:24 ` Pavel Machek
2008-03-11 23:24 ` Pavel Machek
2008-03-11 23:24 ` Pavel Machek
2008-03-11 23:49 ` Rafael J. Wysocki
2008-03-11 23:49 ` Rafael J. Wysocki
2008-03-12 1:55 ` Huang, Ying
2008-03-12 1:55 ` Huang, Ying
2008-03-12 1:55 ` Huang, Ying
2008-03-12 15:01 ` Alan Stern
2008-03-12 15:01 ` [linux-pm] " Alan Stern
2008-03-12 15:01 ` Alan Stern
2008-03-12 21:53 ` Rafael J. Wysocki
2008-03-12 21:53 ` [linux-pm] " Rafael J. Wysocki
2008-03-12 21:53 ` Rafael J. Wysocki
2008-03-13 0:33 ` Eric W. Biederman
2008-03-13 0:33 ` [linux-pm] " Eric W. Biederman
2008-03-13 0:33 ` Eric W. Biederman
2008-03-13 17:03 ` Rafael J. Wysocki
2008-03-13 17:03 ` [linux-pm] " Rafael J. Wysocki
2008-03-13 17:03 ` Rafael J. Wysocki
2008-03-13 23:07 ` Eric W. Biederman
2008-03-13 23:07 ` [linux-pm] " Eric W. Biederman
2008-03-13 23:07 ` Eric W. Biederman
2008-03-14 1:31 ` Rafael J. Wysocki
2008-03-14 1:31 ` Rafael J. Wysocki
2008-03-18 16:56 ` Eric W. Biederman
2008-03-18 16:56 ` [linux-pm] " Eric W. Biederman
2008-03-18 23:52 ` Pavel Machek
2008-03-18 23:52 ` Pavel Machek
2008-03-18 23:52 ` Pavel Machek
2008-03-19 0:08 ` Rafael J. Wysocki
2008-03-19 0:08 ` [linux-pm] " Rafael J. Wysocki
2008-03-19 0:08 ` Rafael J. Wysocki
2008-03-19 2:33 ` Alan Stern
2008-03-19 2:33 ` Alan Stern
2008-03-19 3:25 ` Eric W. Biederman
2008-03-19 3:25 ` Eric W. Biederman
2008-03-19 15:01 ` Alan Stern
2008-03-19 15:01 ` [linux-pm] " Alan Stern
2008-03-19 15:01 ` Alan Stern
2008-03-19 19:28 ` Rafael J. Wysocki
2008-03-19 19:28 ` [linux-pm] " Rafael J. Wysocki
2008-03-19 19:28 ` Rafael J. Wysocki
2008-03-20 10:40 ` Pavel Machek
2008-03-20 10:40 ` [linux-pm] " Pavel Machek
2008-03-20 10:40 ` Pavel Machek
2008-03-20 22:45 ` Rafael J. Wysocki
2008-03-20 22:45 ` Rafael J. Wysocki
2008-03-20 23:01 ` Alan Stern
2008-03-20 23:01 ` Alan Stern
2008-03-20 23:22 ` Pavel Machek
2008-03-20 23:22 ` Pavel Machek
2008-03-20 23:40 ` Rafael J. Wysocki
2008-03-20 23:40 ` [linux-pm] " Rafael J. Wysocki
2008-03-20 23:40 ` Rafael J. Wysocki
2008-03-21 0:36 ` Rafael J. Wysocki
2008-03-21 0:36 ` Rafael J. Wysocki
2008-03-21 0:36 ` Rafael J. Wysocki
2008-03-21 0:52 ` Alan Stern
2008-03-21 0:52 ` [linux-pm] " Alan Stern
2008-03-21 0:52 ` Alan Stern
2008-03-21 22:05 ` Nigel Cunningham
2008-03-21 22:05 ` [linux-pm] " Nigel Cunningham
2008-03-21 22:05 ` Nigel Cunningham
2008-03-22 16:21 ` Pavel Machek
2008-03-22 16:21 ` [linux-pm] " Pavel Machek
2008-03-22 16:21 ` Pavel Machek
2008-03-22 17:45 ` Rafael J. Wysocki
2008-03-22 17:45 ` [linux-pm] " Rafael J. Wysocki
2008-03-22 17:45 ` Rafael J. Wysocki
2008-03-22 20:49 ` Alan Stern
2008-03-22 20:49 ` Alan Stern
2008-03-22 21:29 ` Rafael J. Wysocki
2008-03-22 21:29 ` Rafael J. Wysocki
2008-05-14 22:38 ` Eric W. Biederman
2008-05-14 22:38 ` [linux-pm] " Eric W. Biederman
2008-05-14 22:38 ` Eric W. Biederman
2008-05-14 23:47 ` Rafael J. Wysocki
2008-05-14 23:47 ` Rafael J. Wysocki
2008-05-15 20:55 ` Eric W. Biederman
2008-05-15 20:55 ` Eric W. Biederman
2008-05-15 21:20 ` Rafael J. Wysocki
2008-05-15 21:20 ` [linux-pm] " Rafael J. Wysocki
2008-05-15 21:20 ` Rafael J. Wysocki
2008-05-15 20:55 ` Eric W. Biederman
2008-05-14 23:47 ` Rafael J. Wysocki
2008-03-22 21:29 ` Rafael J. Wysocki
2008-03-22 20:49 ` Alan Stern
2008-03-20 23:22 ` Pavel Machek
2008-03-20 23:01 ` Alan Stern
2008-03-20 22:45 ` Rafael J. Wysocki
2008-03-19 2:33 ` Alan Stern
2008-05-14 20:41 ` [linux-pm] " Maxim Levitsky
2008-05-14 20:41 ` Maxim Levitsky
2008-05-14 23:34 ` Eric W. Biederman
2008-05-14 23:34 ` [linux-pm] " Eric W. Biederman
2008-05-14 23:34 ` Eric W. Biederman
2008-05-14 20:41 ` Maxim Levitsky
2008-03-14 1:31 ` Rafael J. Wysocki
2008-03-12 8:57 ` Pavel Machek
2008-03-12 8:57 ` Pavel Machek
2008-03-12 8:57 ` Pavel Machek
2008-03-11 23:49 ` Rafael J. Wysocki
2008-03-12 0:00 ` Nigel Cunningham
2008-03-12 0:00 ` Nigel Cunningham
2008-03-12 0:00 ` Nigel Cunningham
2008-03-12 1:45 ` Huang, Ying
2008-03-12 1:45 ` Huang, Ying
2008-03-12 1:45 ` Huang, Ying
2008-03-12 2:17 ` Eric W. Biederman
2008-03-12 2:17 ` Eric W. Biederman
2008-03-12 6:54 ` Huang, Ying
2008-03-12 6:54 ` Huang, Ying
2008-03-12 6:54 ` Huang, Ying
2008-03-12 19:37 ` Vivek Goyal
2008-03-12 19:37 ` Vivek Goyal
2008-03-12 19:37 ` Vivek Goyal
2008-03-14 8:03 ` Huang, Ying
2008-03-14 8:03 ` Huang, Ying
2008-03-14 8:03 ` Huang, Ying
2008-03-21 19:12 ` Vivek Goyal
2008-03-21 19:12 ` Vivek Goyal
2008-03-21 19:12 ` Vivek Goyal
2008-03-25 7:25 ` Huang, Ying
2008-03-25 7:25 ` Huang, Ying
2008-03-25 7:25 ` Huang, Ying
2008-03-12 2:17 ` Eric W. Biederman
2008-03-12 19:47 ` Vivek Goyal
2008-03-12 19:47 ` Vivek Goyal
2008-03-12 19:47 ` Vivek Goyal
2008-03-11 21:10 ` Vivek Goyal
2008-04-09 9:34 ` Pavel Machek
2008-04-09 9:34 ` Pavel Machek
2008-04-09 12:30 ` Vivek Goyal
2008-04-09 12:30 ` Vivek Goyal
2008-04-09 12:30 ` Vivek Goyal
2008-04-09 9:34 ` Pavel Machek
2008-05-14 16:03 ` Vivek Goyal
2008-05-14 16:03 ` Vivek Goyal
2008-05-14 16:03 ` Vivek Goyal
2008-05-14 17:49 ` Vivek Goyal
2008-05-14 17:49 ` Vivek Goyal
2008-05-14 17:49 ` Vivek Goyal
2008-05-14 20:52 ` Vivek Goyal
2008-05-14 20:52 ` Vivek Goyal
2008-05-15 2:32 ` Huang, Ying
2008-05-15 2:32 ` Huang, Ying
2008-05-15 2:32 ` Huang, Ying
2008-05-15 20:09 ` Vivek Goyal
2008-05-15 20:09 ` Vivek Goyal [this message]
2008-05-15 20:09 ` Vivek Goyal
2008-05-16 1:48 ` Huang, Ying
2008-05-16 1:48 ` Huang, Ying
2008-05-16 1:48 ` Huang, Ying
2008-05-16 1:51 ` Vivek Goyal
2008-05-16 1:51 ` Vivek Goyal
2008-05-16 2:08 ` Huang, Ying
2008-05-16 2:08 ` Huang, Ying
2008-05-16 2:08 ` Huang, Ying
2008-05-16 1:51 ` Vivek Goyal
2008-05-16 12:13 ` Pavel Machek
2008-05-16 12:13 ` Pavel Machek
2008-05-16 12:13 ` Pavel Machek
2008-05-15 5:41 ` Huang, Ying
2008-05-15 5:41 ` Huang, Ying
2008-05-15 5:41 ` Huang, Ying
2008-05-15 18:42 ` Eric W. Biederman
2008-05-15 18:42 ` Eric W. Biederman
2008-05-15 18:42 ` Eric W. Biederman
2008-05-16 0:51 ` Vivek Goyal
2008-05-16 0:51 ` Vivek Goyal
2008-05-16 0:51 ` Vivek Goyal
2008-05-16 1:35 ` Eric W. Biederman
2008-05-16 1:35 ` Eric W. Biederman
2008-05-16 1:55 ` Huang, Ying
2008-05-16 1:55 ` Huang, Ying
2008-05-16 1:55 ` Huang, Ying
2008-05-16 1:35 ` Eric W. Biederman
2008-05-27 7:27 ` Huang, Ying
2008-05-27 7:27 ` Huang, Ying
2008-05-27 22:15 ` Vivek Goyal
2008-05-27 22:15 ` Vivek Goyal
2008-05-27 22:15 ` Vivek Goyal
2008-05-28 1:35 ` Huang, Ying
2008-05-28 1:35 ` Huang, Ying
2008-05-28 1:35 ` Huang, Ying
2008-05-27 7:27 ` Huang, Ying
2008-05-14 20:52 ` Vivek Goyal
2008-05-14 22:30 ` Eric W. Biederman
2008-05-14 22:30 ` Eric W. Biederman
2008-05-14 22:30 ` Eric W. Biederman
2008-05-14 23:55 ` Rafael J. Wysocki
2008-05-14 23:55 ` Rafael J. Wysocki
2008-05-14 23:55 ` Rafael J. Wysocki
2008-05-15 22:03 ` Eric W. Biederman
2008-05-15 22:03 ` Eric W. Biederman
2008-05-15 23:20 ` Rafael J. Wysocki
2008-05-15 23:20 ` Rafael J. Wysocki
2008-05-15 23:20 ` Rafael J. Wysocki
2008-05-16 12:18 ` Pavel Machek
2008-05-16 12:18 ` Pavel Machek
2008-05-16 12:18 ` Pavel Machek
2008-05-16 14:20 ` [linux-pm] " Alan Stern
2008-05-16 14:20 ` Alan Stern
2008-05-16 14:20 ` Alan Stern
2008-05-15 22:03 ` Eric W. Biederman
2008-05-15 1:42 ` Huang, Ying
2008-05-15 1:42 ` Huang, Ying
2008-05-15 1:42 ` Huang, Ying
2008-05-15 19:05 ` Rafael J. Wysocki
2008-05-15 19:05 ` Rafael J. Wysocki
2008-05-15 19:05 ` Rafael J. Wysocki
2008-05-15 14:14 ` [linux-pm] " Alan Stern
2008-05-15 14:14 ` Alan Stern
2008-05-15 20:48 ` Eric W. Biederman
2008-05-15 20:48 ` Eric W. Biederman
2008-05-15 21:07 ` Alan Stern
2008-05-15 21:07 ` Alan Stern
2008-05-15 21:07 ` [linux-pm] " Alan Stern
2008-05-15 21:07 ` Alan Stern
2008-05-15 20:48 ` Eric W. Biederman
2008-05-15 14:14 ` Alan Stern
-- strict thread matches above, loose matches on Subject: below --
2008-03-06 3:13 Huang, Ying
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