Re: [PATCH 2/2] ppc64: Add a flag to tell the kernel it's booting from kexec

On Mon, 2015-08-17 at 13:59 -0500, Scott Wood wrote:

On Sat, 2015-07-18 at 14:57 -0500, Scott Wood wrote:

quoted

It needs to know this because the SMP release mechanism for Freescale
book3e is different from when booting with normal hardware.  In theory
we could simulate the normal spin table mechanism, but not (easily) at
the addresses U-Boot put in the device tree -- so there'd need to be
even more communication between the kernel and kexec to set that up.
Since there's already a similar flag being set (for kdump only), this
seemed like a reasonable approach.

Signed-off-by: Scott Wood <redacted>
---
 kexec/arch/ppc64/kexec-elf-ppc64.c | 11 ++++++++++-
 kexec/arch/ppc64/kexec-ppc64.h     |  2 ++
 purgatory/arch/ppc64/v2wrap.S      | 11 +++++++++++
 3 files changed, 23 insertions(+), 1 deletion(-)

Any comment on these two patches?

We should probably reserve 0x58 in the kernel's head_64.S too?

cheers