2024-09-09 08:52:07 +00:00
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/*
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* Copyright 2006 Michael Ellerman, IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <asm/machdep.h>
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#include <asm/page.h>
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#include <asm/firmware.h>
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#include <asm/kexec.h>
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#include <asm/mpic.h>
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#include <asm/xics.h>
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#include <asm/smp.h>
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2024-09-09 08:57:42 +00:00
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#include <asm/plpar_wrappers.h>
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2024-09-09 08:52:07 +00:00
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#include "pseries.h"
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static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
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{
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/* Don't risk a hypervisor call if we're crashing */
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if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
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int ret;
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int cpu = smp_processor_id();
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int hwcpu = hard_smp_processor_id();
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if (get_lppaca()->dtl_enable_mask) {
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ret = unregister_dtl(hwcpu);
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if (ret) {
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pr_err("WARNING: DTL deregistration for cpu "
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"%d (hw %d) failed with %d\n",
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cpu, hwcpu, ret);
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}
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}
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ret = unregister_slb_shadow(hwcpu);
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if (ret) {
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pr_err("WARNING: SLB shadow buffer deregistration "
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"for cpu %d (hw %d) failed with %d\n",
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cpu, hwcpu, ret);
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}
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ret = unregister_vpa(hwcpu);
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if (ret) {
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pr_err("WARNING: VPA deregistration for cpu %d "
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"(hw %d) failed with %d\n", cpu, hwcpu, ret);
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}
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}
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}
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static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary)
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{
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pseries_kexec_cpu_down(crash_shutdown, secondary);
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mpic_teardown_this_cpu(secondary);
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}
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void __init setup_kexec_cpu_down_mpic(void)
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{
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ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
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}
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static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary)
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{
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pseries_kexec_cpu_down(crash_shutdown, secondary);
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xics_kexec_teardown_cpu(secondary);
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}
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void __init setup_kexec_cpu_down_xics(void)
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{
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ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
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}
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