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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2006 Michael Ellerman, IBM Corporation
*/
#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/xics.h>
#include <asm/xive.h>
#include <asm/smp.h>
#include <asm/plpar_wrappers.h>
#include "pseries.h"
void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
{
/*
* Don't risk a hypervisor call if we're crashing
* XXX: Why? The hypervisor is not crashing. It might be better
* to at least attempt unregister to avoid the hypervisor stepping
* on our memory.
*/
if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
int ret;
int cpu = smp_processor_id();
int hwcpu = hard_smp_processor_id();
if (get_lppaca()->dtl_enable_mask) {
ret = unregister_dtl(hwcpu);
if (ret) {
pr_err("WARNING: DTL deregistration for cpu "
"%d (hw %d) failed with %d\n",
cpu, hwcpu, ret);
}
}
ret = unregister_slb_shadow(hwcpu);
if (ret) {
pr_err("WARNING: SLB shadow buffer deregistration "
"for cpu %d (hw %d) failed with %d\n",
cpu, hwcpu, ret);
}
ret = unregister_vpa(hwcpu);
if (ret) {
pr_err("WARNING: VPA deregistration for cpu %d "
"(hw %d) failed with %d\n", cpu, hwcpu, ret);
}
}
if (xive_enabled()) {
xive_teardown_cpu();
if (!secondary)
xive_shutdown();
} else
xics_kexec_teardown_cpu(secondary);
}
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