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63 lines
1.5 KiB
63 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright 2006 Michael Ellerman, IBM Corporation |
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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/xics.h> |
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#include <asm/xive.h> |
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#include <asm/smp.h> |
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#include <asm/plpar_wrappers.h> |
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#include "pseries.h" |
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void pseries_kexec_cpu_down(int crash_shutdown, int secondary) |
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{ |
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/* |
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* Don't risk a hypervisor call if we're crashing |
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* XXX: Why? The hypervisor is not crashing. It might be better |
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* to at least attempt unregister to avoid the hypervisor stepping |
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* on our memory. |
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*/ |
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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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if (xive_enabled()) { |
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xive_teardown_cpu(); |
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if (!secondary) |
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xive_shutdown(); |
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} else |
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xics_kexec_teardown_cpu(secondary); |
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}
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