linux-kernel - [V2 PATCH] socfpga_a10: fix a kexec boot issue

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Message-ID: <20170515091336.10827-1-yanjiang.jin@windriver.com>
Date:   Mon, 15 May 2017 17:13:35 +0800
From:   <yanjiang.jin@...driver.com>
To:     <mark.rutland@....com>, <dinguyen@...nel.org>,
        <dinguyen@...nsource.altera.com>, <linux@....linux.org.uk>
CC:     <jinyanjiang@...il.com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [V2 PATCH] socfpga_a10: fix a kexec boot issue

From: Yanjiang Jin <yanjiang.jin@...driver.com>

V1->V2:
1. Add flush_cache_all() in cpu_die();
2. Add more descriptive on the commit log;
Also validate kexec and CPU_HOTPLUG as before.

I guess socfpga's other boards may need this patch, but I have Arria10
board only. 
So add a new function socfpga_a10_cpu_kill(), keep the old function
socfpga_cpu_kill() for other boards.
I also verified CPU_HOTPLUG after applying this patch, everything seems well.

Test steps:

1. Enable kexec and build a SOCFPGA kernel;
2. Use zImage as 1st and 2nd kernel;
3. kexec -l /root/zImage --append="`cat /proc/cmdline`" 
4. kexec -e

Test env:

U-Boot 2014.10 (Jan 13 2016 - 11:07:09)

CPU   : Altera SOCFPGA Arria 10 Platform
BOARD : Altera SOCFPGA Arria 10 Dev Kit

-- 
1.9.1