mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 22:02:28 +00:00
b1301797f3
Recent versions of firmware will fail to unmap the virtual processor area if we have a dispatch trace log registered. This causes kexec to fail. If a trace log is registered this patch unregisters it before the SLB shadow and virtual processor areas, fixing the problem. The address argument is ignored by firmware on unregister so we may as well remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
|
|
* Copyright 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/interrupt.h>
|
|
|
|
#include <asm/machdep.h>
|
|
#include <asm/page.h>
|
|
#include <asm/firmware.h>
|
|
#include <asm/kexec.h>
|
|
#include <asm/mpic.h>
|
|
#include <asm/xics.h>
|
|
#include <asm/smp.h>
|
|
|
|
#include "pseries.h"
|
|
#include "plpar_wrappers.h"
|
|
|
|
static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
|
|
{
|
|
/* Don't risk a hypervisor call if we're crashing */
|
|
if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
|
|
unsigned long addr;
|
|
int ret;
|
|
|
|
if (get_lppaca()->dtl_enable_mask) {
|
|
ret = unregister_dtl(hard_smp_processor_id());
|
|
if (ret) {
|
|
pr_err("WARNING: DTL deregistration for cpu "
|
|
"%d (hw %d) failed with %d\n",
|
|
smp_processor_id(),
|
|
hard_smp_processor_id(), ret);
|
|
}
|
|
}
|
|
|
|
addr = __pa(get_slb_shadow());
|
|
if (unregister_slb_shadow(hard_smp_processor_id(), addr))
|
|
printk("SLB shadow buffer deregistration of "
|
|
"cpu %u (hw_cpu_id %d) failed\n",
|
|
smp_processor_id(),
|
|
hard_smp_processor_id());
|
|
|
|
addr = __pa(get_lppaca());
|
|
if (unregister_vpa(hard_smp_processor_id(), addr)) {
|
|
printk("VPA deregistration of cpu %u (hw_cpu_id %d) "
|
|
"failed\n", smp_processor_id(),
|
|
hard_smp_processor_id());
|
|
}
|
|
}
|
|
}
|
|
|
|
static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary)
|
|
{
|
|
pseries_kexec_cpu_down(crash_shutdown, secondary);
|
|
mpic_teardown_this_cpu(secondary);
|
|
}
|
|
|
|
void __init setup_kexec_cpu_down_mpic(void)
|
|
{
|
|
ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
|
|
}
|
|
|
|
static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary)
|
|
{
|
|
pseries_kexec_cpu_down(crash_shutdown, secondary);
|
|
xics_kexec_teardown_cpu(secondary);
|
|
}
|
|
|
|
void __init setup_kexec_cpu_down_xics(void)
|
|
{
|
|
ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
|
|
}
|