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From: geoff@infradead.org (Geoff Levand)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/7] arm64 kexec kernel patches V3
Date: Tue, 30 Sep 2014 14:27:56 -0700	[thread overview]
Message-ID: <1412112476.6630.56.camel@smoke> (raw)
In-Reply-To: <20140930202904.GB24153@redhat.com>

Hi Vivek,

On Tue, 2014-09-30 at 16:29 -0400, Vivek Goyal wrote:
> On Thu, Sep 25, 2014 at 12:23:26AM +0000, Geoff Levand wrote:
> 
> [..]
> > To load a second stage kernel and execute a kexec re-boot on arm64 my patches to
> > kexec-tools [2], which have not yet been merged upstream, are needed.
> > 
> > This series does not include some re-work of the spin-table CPU enable method
> > that is needed to support it,
> 
> How do I figure out if my system has spin table enable method or psci
> enable method. Can one change it. I wanted to test your patches.

The enable method is a function the firmware/bootloader provides.
Multiple methods may be supported.  The boot-wrapper-aarch64
build defaults to spin-table, but has the configure option --enable-psci.

For a running system you can check the device tree:

  cat /proc/device-tree/cpus/cpu\@0/enable-method | hexdump -C

Or the dmsg:

  dmesg | egrep -i 'psci'

Or use the --debug option to kexec:

  kexec --debug --load /boot/vmlinux.strip ...

read_cpu_info:398: cpu-0 (/cpus/cpu at 0): hwid-0, 'psci'

-Geoff

  reply	other threads:[~2014-09-30 21:27 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-25  0:23 [PATCH 0/7] arm64 kexec kernel patches V3 Geoff Levand
2014-09-25  0:23 ` [PATCH 3/7] arm64: Add new hcall HVC_CALL_FUNC Geoff Levand
2014-09-25  0:23 ` [PATCH 4/7] arm64: Add EL2 switch to soft_restart Geoff Levand
2014-09-25  0:23 ` [PATCH 2/7] arm64: Convert hcalls to use ISS field Geoff Levand
2014-10-03 10:51   ` Mark Rutland
2014-10-03 21:56     ` Geoff Levand
2014-10-06 10:13       ` Mark Rutland
2014-09-25  0:23 ` [PATCH 1/7] arm64/kvm: Fix assembler compatibility of macros Geoff Levand
2014-10-03 10:26   ` Mark Rutland
2014-10-03 22:27     ` Geoff Levand
2014-10-06 10:10       ` Mark Rutland
2014-09-25  0:23 ` [PATCH 7/7] arm64/kexec: Enable kexec in the arm64 defconfig Geoff Levand
2014-09-25  0:23 ` [PATCH 5/7] arm64: Move proc-macros.S to include/asm Geoff Levand
2014-09-25  0:23 ` [PATCH 6/7] arm64/kexec: Add core kexec support Geoff Levand
2014-09-25 18:28   ` Vivek Goyal
2014-09-25 19:02     ` Geoff Levand
2014-09-25 19:08       ` Vivek Goyal
2014-09-30 18:18   ` Vivek Goyal
2014-09-30 19:54     ` Geoff Levand
2014-10-01 14:56       ` Vivek Goyal
2014-10-03 18:35         ` Geoff Levand
2014-10-07 13:44           ` Vivek Goyal
2014-10-07 18:42             ` Geoff Levand
2014-10-07 18:45               ` Vivek Goyal
2014-10-07 20:12                 ` Geoff Levand
2014-10-07 20:22                   ` Vivek Goyal
2014-10-09 22:26                     ` Geoff Levand
2014-10-23 23:08                       ` Geoff Levand
2014-10-08  9:28                   ` Mark Rutland
2014-10-07 18:48               ` Vivek Goyal
2014-10-01 16:16       ` Mark Rutland
2014-10-01 17:36         ` Vivek Goyal
2014-10-01 17:56           ` Mark Rutland
2014-10-01 17:47         ` Vivek Goyal
2014-10-01 18:03           ` Mark Rutland
2014-10-01 18:09             ` Vivek Goyal
2014-10-01 18:19               ` Mark Rutland
2014-10-01 18:31                 ` Vivek Goyal
2014-10-01 19:22             ` Vivek Goyal
2014-10-02 10:26               ` Mark Rutland
2014-10-02 13:54                 ` Vivek Goyal
2014-10-02 16:53                   ` Mark Rutland
2014-09-30 23:59   ` [PATCH V2 " Geoff Levand
2014-09-30 20:29 ` [PATCH 0/7] arm64 kexec kernel patches V3 Vivek Goyal
2014-09-30 21:27   ` Geoff Levand [this message]
2014-10-02 19:08     ` Vivek Goyal
2014-10-02 22:59       ` Geoff Levand
2014-10-07 13:43         ` Vivek Goyal
2014-10-07 14:06           ` Mark Rutland
2014-10-01 15:19 ` Vivek Goyal
2014-10-03 21:16   ` Geoff Levand
2014-10-07 13:40     ` Vivek Goyal
2014-10-07 18:29       ` Geoff Levand
2014-10-08  9:42       ` Mark Rutland
2014-10-09  3:21         ` Dave Young
2014-10-09 10:09           ` Mark Rutland
2014-10-09 10:19             ` Ard Biesheuvel
2014-10-10  5:30             ` Dave Young
2014-10-07 15:22     ` Mark Rutland
2014-10-07 18:28       ` Geoff Levand
2014-10-07 18:09 ` Vivek Goyal
2014-10-07 20:07   ` Geoff Levand
2014-10-08  9:52     ` Leif Lindholm
2014-10-08 10:07       ` Mark Rutland
2014-10-09  9:22 ` Will Deacon

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