redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

[POWERPC] Move rtas_stop_self() into platforms/pseries/hotplug-cpu.c 

As the first step in consolidating the pseries hotplug cpu code,
create platforms/pseries/hotplug-cpu.c and move rtas_stop_self()
into it.  Do the rtas token initialisation in a new initcall, rather
than rtas_initialize().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
hifive-unleashed-5.1
Michael Ellerman 2006-12-05 17:52:36 +11:00 committed by Paul Mackerras
parent a081e126e1
commit 0332c2d447
3 changed files with 60 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
arch/powerpc/kernel/rtas.c
View File

@ -810,32 +810,6 @@ asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
return 0;
}
#ifdef CONFIG_HOTPLUG_CPU
/* This version can't take the spinlock, because it never returns */
static struct rtas_args rtas_stop_self_args = {
/* The token is initialized for real in setup_system() */
.token = RTAS_UNKNOWN_SERVICE,
.nargs = 0,
.nret = 1,
.rets = &rtas_stop_self_args.args[0],
};
void rtas_stop_self(void)
{
struct rtas_args *rtas_args = &rtas_stop_self_args;
local_irq_disable();
BUG_ON(rtas_args->token == RTAS_UNKNOWN_SERVICE);
printk("cpu %u (hwid %u) Ready to die...\n",
smp_processor_id(), hard_smp_processor_id());
enter_rtas(__pa(rtas_args));
panic("Alas, I survived.\n");
}
#endif
/*
* Call early during boot, before mem init or bootmem, to retrieve the RTAS
* informations from the device-tree and allocate the RMO buffer for userland
@ -880,9 +854,6 @@ void __init rtas_initialize(void)
#endif
rtas_rmo_buf = lmb_alloc_base(RTAS_RMOBUF_MAX, PAGE_SIZE, rtas_region);
#ifdef CONFIG_HOTPLUG_CPU
rtas_stop_self_args.token = rtas_token("stop-self");
#endif /* CONFIG_HOTPLUG_CPU */
#ifdef CONFIG_RTAS_ERROR_LOGGING
rtas_last_error_token = rtas_token("rtas-last-error");
#endif

2
arch/powerpc/platforms/pseries/Makefile
View File

@ -10,6 +10,8 @@ obj-$(CONFIG_XICS) += xics.o
obj-$(CONFIG_SCANLOG) += scanlog.o
obj-$(CONFIG_EEH) += eeh.o eeh_cache.o eeh_driver.o eeh_event.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug-cpu.o
obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o
obj-$(CONFIG_HVCS) += hvcserver.o
obj-$(CONFIG_HCALL_STATS) += hvCall_inst.o

58
arch/powerpc/platforms/pseries/hotplug-cpu.c 100644
View File

@ -0,0 +1,58 @@
/*
* pseries CPU Hotplug infrastructure.
*
* Split out from arch/powerpc/kernel/rtas.c
*
* Peter Bergner, IBM March 2001.
* Copyright (C) 2001 IBM.
*
* Copyright (C) 2006 Michael Ellerman, IBM Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/cpu.h>
#include <asm/system.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/firmware.h>
#include <asm/machdep.h>
#include <asm/vdso_datapage.h>
#include <asm/pSeries_reconfig.h>
#include "xics.h"
/* This version can't take the spinlock, because it never returns */
static struct rtas_args rtas_stop_self_args = {
.token = RTAS_UNKNOWN_SERVICE,
.nargs = 0,
.nret = 1,
.rets = &rtas_stop_self_args.args[0],
};
void rtas_stop_self(void)
{
struct rtas_args *args = &rtas_stop_self_args;
local_irq_disable();
BUG_ON(args->token == RTAS_UNKNOWN_SERVICE);
printk("cpu %u (hwid %u) Ready to die...\n",
smp_processor_id(), hard_smp_processor_id());
enter_rtas(__pa(args));
panic("Alas, I survived.\n");
}
static int __init pseries_cpu_hotplug_init(void)
{
rtas_stop_self_args.token = rtas_token("stop-self");
return 0;
}
arch_initcall(pseries_cpu_hotplug_init);