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From: geoff@infradead.org (Geoff Levand)
To: linux-arm-kernel@lists.infradead.org
Subject: Kexec on arm64
Date: Wed, 16 Jul 2014 16:04:21 -0700	[thread overview]
Message-ID: <1405551861.7262.26.camel@smoke> (raw)
In-Reply-To: <CAL85gmC9LLcN_uxMY1bM5kLx=N7rZGdGO3bmGHeUVo=Rqgk8uw@mail.gmail.com>

Hi Feng,

On Wed, 2014-07-16 at 10:57 -0700, Feng Kan wrote:
> Just following up on the conversation. The cpu return address of 0 should work
> in your case. Since thats the _start of the bootloader, it will run
> some core init
> code and then put the core back in wfe. 

OK, I fixed up my code so that zero is valid cpu return address.  Arun,
could you try my latest I pushed out today?

> However, I think this
> functionality should
> be pushed back into the kernel side to provide some small page of spin
> code rather
> than depend on the bootloader. 

This method was already discussed in another thread [1] and decided
against.  With this we would need to set that spin code memory as
reserved from kernel use, and so each boot stage would leak some memory.
A system would eventually run out of memory over kexec's.

[1] http://comments.gmane.org/gmane.linux.ports.arm.kernel/323440

-Geoff

  reply	other threads:[~2014-07-16 23:04 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAFdej006OSyhgDcJ2iZdbjt+PtysN=i_+9Dr4GTmr=+t5yg4Kw@mail.gmail.com>
2014-07-15 17:04 ` Kexec on arm64 Geoff Levand
2014-07-16 17:57   ` Feng Kan
2014-07-16 23:04     ` Geoff Levand [this message]
2014-07-22  9:44       ` Arun Chandran
2014-07-22 13:25         ` Arun Chandran
2014-07-24  0:38           ` Geoff Levand
2014-07-24  9:36             ` Mark Rutland
2014-07-24 12:49               ` Arun Chandran
2014-07-25  0:17               ` Geoff Levand
2014-07-25 10:31                 ` Arun Chandran
2014-07-25 10:36                 ` Mark Rutland
2014-07-25 11:48                 ` Arun Chandran
2014-07-25 12:14                   ` Mark Rutland
2014-07-25 15:29                     ` Arun Chandran
2014-07-26  0:18                   ` Geoff Levand
2014-07-28 15:00                     ` Arun Chandran
2014-07-28 15:38                       ` Mark Rutland
2014-07-29  0:09                         ` Geoff Levand
2014-07-29  9:10                           ` Mark Rutland
2014-07-29 12:32                           ` Arun Chandran
2014-07-29 13:35                             ` Mark Rutland
2014-07-29 21:19                               ` Geoff Levand
2014-07-30  7:22                                 ` Arun Chandran
2014-08-01 11:13                                   ` Arun Chandran
2014-08-03 14:47                                     ` Mark Rutland
2014-08-04 10:16                                   ` Arun Chandran
2014-08-04 11:35                                     ` Mark Rutland
2014-08-07  0:40                                       ` Geoff Levand
2014-08-07  9:59                                         ` Mark Rutland
2014-08-07 17:09                                           ` Geoff Levand
2014-08-04 17:21                                     ` Geoff Levand
2014-08-06 13:54                                       ` Arun Chandran
2014-08-06 15:51                                         ` Arun Chandran
2014-08-07 20:07                                         ` Geoff Levand
2014-08-08  5:46                                           ` Arun Chandran
2014-08-08 10:03                                             ` Arun Chandran
2014-08-12  5:42                                               ` Arun Chandran
2014-08-13 11:09                                                 ` Arun Chandran
2014-08-26 22:32                                                   ` Geoff Levand
2014-08-27  4:56                                                     ` Arun Chandran
2014-07-30  5:46                               ` Arun Chandran
2014-07-30  9:16                                 ` Mark Rutland
2014-07-30  7:01                               ` Arun Chandran
2014-07-25 10:26               ` Arun Chandran
2014-07-25 11:29                 ` Mark Rutland
2014-07-24 11:50             ` Arun Chandran
2014-07-30  3:26           ` Feng Kan
2014-07-24  0:10         ` Geoff Levand
2014-07-24  9:13         ` Mark Rutland
2014-07-09 10:13 Arun Chandran
2014-07-09 13:58 ` Arun Chandran
2014-07-09 18:49   ` Geoff Levand
2014-07-11  9:23     ` Arun Chandran
2014-07-11 16:58       ` Geoff Levand
2014-07-11 11:26     ` Arun Chandran
2014-07-12  0:19       ` Geoff Levand
2014-07-14 12:21         ` Arun Chandran
2014-07-11 15:43     ` Arun Chandran
2014-07-14 22:05       ` Geoff Levand
2014-07-15 15:28         ` Arun Chandran
2014-07-09 18:33 ` Geoff Levand

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