1 files changed, 0 insertions, 257 deletions
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
deleted file mode 100644
index 88b3ce3e66..0000000000
--- a/arch/ia64/kernel/crash.c
+++ /dev/null
@@ -1,257 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * arch/ia64/kernel/crash.c
- *
- * Architecture specific (ia64) functions for kexec based crash dumps.
- *
- * Created by: Khalid Aziz <khalid.aziz@hp.com>
- * Copyright (C) 2005 Hewlett-Packard Development Company, L.P.
- * Copyright (C) 2005 Intel Corp	Zou Nan hai <nanhai.zou@intel.com>
- *
- */
-#include <linux/smp.h>
-#include <linux/delay.h>
-#include <linux/crash_dump.h>
-#include <linux/memblock.h>
-#include <linux/kexec.h>
-#include <linux/elfcore.h>
-#include <linux/reboot.h>
-#include <linux/sysctl.h>
-#include <linux/init.h>
-#include <linux/kdebug.h>
-
-#include <asm/mca.h>
-
-int kdump_status[NR_CPUS];
-static atomic_t kdump_cpu_frozen;
-atomic_t kdump_in_progress;
-static int kdump_freeze_monarch;
-static int kdump_on_init = 1;
-static int kdump_on_fatal_mca = 1;
-
-extern void ia64_dump_cpu_regs(void *);
-
-static DEFINE_PER_CPU(struct elf_prstatus, elf_prstatus);
-
-void
-crash_save_this_cpu(void)
-{
-	void *buf;
-	unsigned long cfm, sof, sol;
-
-	int cpu = smp_processor_id();
-	struct elf_prstatus *prstatus = &per_cpu(elf_prstatus, cpu);
-
-	elf_greg_t *dst = (elf_greg_t *)&(prstatus->pr_reg);
-	memset(prstatus, 0, sizeof(*prstatus));
-	prstatus->common.pr_pid = current->pid;
-
-	ia64_dump_cpu_regs(dst);
-	cfm = dst[43];
-	sol = (cfm >> 7) & 0x7f;
-	sof = cfm & 0x7f;
-	dst[46] = (unsigned long)ia64_rse_skip_regs((unsigned long *)dst[46],
-			sof - sol);
-
-	buf = (u64 *) per_cpu_ptr(crash_notes, cpu);
-	if (!buf)
-		return;
-	buf = append_elf_note(buf, KEXEC_CORE_NOTE_NAME, NT_PRSTATUS, prstatus,
-			sizeof(*prstatus));
-	final_note(buf);
-}
-
-#ifdef CONFIG_SMP
-static int
-kdump_wait_cpu_freeze(void)
-{
-	int cpu_num = num_online_cpus() - 1;
-	int timeout = 1000;
-	while(timeout-- > 0) {
-		if (atomic_read(&kdump_cpu_frozen) == cpu_num)
-			return 0;
-		udelay(1000);
-	}
-	return 1;
-}
-#endif
-
-void
-machine_crash_shutdown(struct pt_regs *pt)
-{
-	/* This function is only called after the system
-	 * has paniced or is otherwise in a critical state.
-	 * The minimum amount of code to allow a kexec'd kernel
-	 * to run successfully needs to happen here.
-	 *
-	 * In practice this means shooting down the other cpus in
-	 * an SMP system.
-	 */
-	kexec_disable_iosapic();
-#ifdef CONFIG_SMP
-	/*
-	 * If kdump_on_init is set and an INIT is asserted here, kdump will
-	 * be started again via INIT monarch.
-	 */
-	local_irq_disable();
-	ia64_set_psr_mc();	/* mask MCA/INIT */
-	if (atomic_inc_return(&kdump_in_progress) != 1)
-		unw_init_running(kdump_cpu_freeze, NULL);
-
-	/*
-	 * Now this cpu is ready for kdump.
-	 * Stop all others by IPI or INIT.  They could receive INIT from
-	 * outside and might be INIT monarch, but only thing they have to
-	 * do is falling into kdump_cpu_freeze().
-	 *
-	 * If an INIT is asserted here:
-	 * - All receivers might be slaves, since some of cpus could already
-	 *   be frozen and INIT might be masked on monarch.  In this case,
-	 *   all slaves will be frozen soon since kdump_in_progress will let
-	 *   them into DIE_INIT_SLAVE_LEAVE.
-	 * - One might be a monarch, but INIT rendezvous will fail since
-	 *   at least this cpu already have INIT masked so it never join
-	 *   to the rendezvous.  In this case, all slaves and monarch will
-	 *   be frozen soon with no wait since the INIT rendezvous is skipped
-	 *   by kdump_in_progress.
-	 */
-	kdump_smp_send_stop();
-	/* not all cpu response to IPI, send INIT to freeze them */
-	if (kdump_wait_cpu_freeze()) {
-		kdump_smp_send_init();
-		/* wait again, don't go ahead if possible */
-		kdump_wait_cpu_freeze();
-	}
-#endif
-}
-
-static void
-machine_kdump_on_init(void)
-{
-	crash_save_vmcoreinfo();
-	local_irq_disable();
-	kexec_disable_iosapic();
-	machine_kexec(ia64_kimage);
-}
-
-void
-kdump_cpu_freeze(struct unw_frame_info *info, void *arg)
-{
-	int cpuid;
-
-	local_irq_disable();
-	cpuid = smp_processor_id();
-	crash_save_this_cpu();
-	current->thread.ksp = (__u64)info->sw - 16;
-
-	ia64_set_psr_mc();	/* mask MCA/INIT and stop reentrance */
-
-	atomic_inc(&kdump_cpu_frozen);
-	kdump_status[cpuid] = 1;
-	mb();
-	for (;;)
-		cpu_relax();
-}
-
-static int
-kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
-{
-	struct ia64_mca_notify_die *nd;
-	struct die_args *args = data;
-
-	if (atomic_read(&kdump_in_progress)) {
-		switch (val) {
-		case DIE_INIT_MONARCH_LEAVE:
-			if (!kdump_freeze_monarch)
-				break;
-			fallthrough;
-		case DIE_INIT_SLAVE_LEAVE:
-		case DIE_INIT_MONARCH_ENTER:
-		case DIE_MCA_RENDZVOUS_LEAVE:
-			unw_init_running(kdump_cpu_freeze, NULL);
-			break;
-		}
-	}
-
-	if (!kdump_on_init && !kdump_on_fatal_mca)
-		return NOTIFY_DONE;
-
-	if (!ia64_kimage) {
-		if (val == DIE_INIT_MONARCH_LEAVE)
-			ia64_mca_printk(KERN_NOTICE
-					"%s: kdump not configured\n",
-					__func__);
-		return NOTIFY_DONE;
-	}
-
-	if (val != DIE_INIT_MONARCH_LEAVE &&
-	    val != DIE_INIT_MONARCH_PROCESS &&
-	    val != DIE_MCA_MONARCH_LEAVE)
-		return NOTIFY_DONE;
-
-	nd = (struct ia64_mca_notify_die *)args->err;
-
-	switch (val) {
-	case DIE_INIT_MONARCH_PROCESS:
-		/* Reason code 1 means machine check rendezvous*/
-		if (kdump_on_init && (nd->sos->rv_rc != 1)) {
-			if (atomic_inc_return(&kdump_in_progress) != 1)
-				kdump_freeze_monarch = 1;
-		}
-		break;
-	case DIE_INIT_MONARCH_LEAVE:
-		/* Reason code 1 means machine check rendezvous*/
-		if (kdump_on_init && (nd->sos->rv_rc != 1))
-			machine_kdump_on_init();
-		break;
-	case DIE_MCA_MONARCH_LEAVE:
-		/* *(nd->data) indicate if MCA is recoverable */
-		if (kdump_on_fatal_mca && !(*(nd->data))) {
-			if (atomic_inc_return(&kdump_in_progress) == 1)
-				machine_kdump_on_init();
-			/* We got fatal MCA while kdump!? No way!! */
-		}
-		break;
-	}
-	return NOTIFY_DONE;
-}
-
-#ifdef CONFIG_SYSCTL
-static struct ctl_table kdump_ctl_table[] = {
-	{
-		.procname = "kdump_on_init",
-		.data = &kdump_on_init,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec,
-	},
-	{
-		.procname = "kdump_on_fatal_mca",
-		.data = &kdump_on_fatal_mca,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec,
-	},
-	{ }
-};
-#endif
-
-static int
-machine_crash_setup(void)
-{
-	/* be notified before default_monarch_init_process */
-	static struct notifier_block kdump_init_notifier_nb = {
-		.notifier_call = kdump_init_notifier,
-		.priority = 1,
-	};
-	int ret;
-	if((ret = register_die_notifier(&kdump_init_notifier_nb)) != 0)
-		return ret;
-#ifdef CONFIG_SYSCTL
-	register_sysctl("kernel", kdump_ctl_table);
-#endif
-	return 0;
-}
-
-__initcall(machine_crash_setup);
-