Re: [PATCH 2/2] ppc64: Add a flag to tell the kernel it's booting from kexec
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2015-08-18 03:53:12
Also in:
kexec
On Mon, 2015-08-17 at 22:30 -0500, Scott Wood wrote:
On Tue, 2015-08-18 at 12:51 +1000, Michael Ellerman wrote:quoted
On Mon, 2015-08-17 at 13:59 -0500, Scott Wood wrote:quoted
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?That's done in http://patchwork.ozlabs.org/patch/497417/
Right, sorry should have reviewed those :)
Or do you mean that you want the kernel change to go in before the userspace change?
No I'm not bothered about the ordering really. cheers