diff options
Diffstat (limited to 'arch/ia64/kernel/mca.c')
| -rw-r--r-- | arch/ia64/kernel/mca.c | 2111 |
1 files changed, 0 insertions, 2111 deletions
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c deleted file mode 100644 index 2671688d34..0000000000 --- a/arch/ia64/kernel/mca.c +++ /dev/null @@ -1,2111 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * File: mca.c - * Purpose: Generic MCA handling layer - * - * Copyright (C) 2003 Hewlett-Packard Co - * David Mosberger-Tang <davidm@hpl.hp.com> - * - * Copyright (C) 2002 Dell Inc. - * Copyright (C) Matt Domsch <Matt_Domsch@dell.com> - * - * Copyright (C) 2002 Intel - * Copyright (C) Jenna Hall <jenna.s.hall@intel.com> - * - * Copyright (C) 2001 Intel - * Copyright (C) Fred Lewis <frederick.v.lewis@intel.com> - * - * Copyright (C) 2000 Intel - * Copyright (C) Chuck Fleckenstein <cfleck@co.intel.com> - * - * Copyright (C) 1999, 2004-2008 Silicon Graphics, Inc. - * Copyright (C) Vijay Chander <vijay@engr.sgi.com> - * - * Copyright (C) 2006 FUJITSU LIMITED - * Copyright (C) Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> - * - * 2000-03-29 Chuck Fleckenstein <cfleck@co.intel.com> - * Fixed PAL/SAL update issues, began MCA bug fixes, logging issues, - * added min save state dump, added INIT handler. - * - * 2001-01-03 Fred Lewis <frederick.v.lewis@intel.com> - * Added setup of CMCI and CPEI IRQs, logging of corrected platform - * errors, completed code for logging of corrected & uncorrected - * machine check errors, and updated for conformance with Nov. 2000 - * revision of the SAL 3.0 spec. - * - * 2002-01-04 Jenna Hall <jenna.s.hall@intel.com> - * Aligned MCA stack to 16 bytes, added platform vs. CPU error flag, - * set SAL default return values, changed error record structure to - * linked list, added init call to sal_get_state_info_size(). - * - * 2002-03-25 Matt Domsch <Matt_Domsch@dell.com> - * GUID cleanups. - * - * 2003-04-15 David Mosberger-Tang <davidm@hpl.hp.com> - * Added INIT backtrace support. - * - * 2003-12-08 Keith Owens <kaos@sgi.com> - * smp_call_function() must not be called from interrupt context - * (can deadlock on tasklist_lock). - * Use keventd to call smp_call_function(). - * - * 2004-02-01 Keith Owens <kaos@sgi.com> - * Avoid deadlock when using printk() for MCA and INIT records. - * Delete all record printing code, moved to salinfo_decode in user - * space. Mark variables and functions static where possible. - * Delete dead variables and functions. Reorder to remove the need - * for forward declarations and to consolidate related code. - * - * 2005-08-12 Keith Owens <kaos@sgi.com> - * Convert MCA/INIT handlers to use per event stacks and SAL/OS - * state. - * - * 2005-10-07 Keith Owens <kaos@sgi.com> - * Add notify_die() hooks. - * - * 2006-09-15 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> - * Add printing support for MCA/INIT. - * - * 2007-04-27 Russ Anderson <rja@sgi.com> - * Support multiple cpus going through OS_MCA in the same event. - */ -#include <linux/jiffies.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/sched/signal.h> -#include <linux/sched/debug.h> -#include <linux/sched/task.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/memblock.h> -#include <linux/acpi.h> -#include <linux/timer.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/smp.h> -#include <linux/workqueue.h> -#include <linux/cpumask.h> -#include <linux/kdebug.h> -#include <linux/cpu.h> -#include <linux/gfp.h> - -#include <asm/delay.h> -#include <asm/efi.h> -#include <asm/meminit.h> -#include <asm/page.h> -#include <asm/ptrace.h> -#include <asm/sal.h> -#include <asm/mca.h> -#include <asm/mca_asm.h> -#include <asm/kexec.h> - -#include <asm/irq.h> -#include <asm/hw_irq.h> -#include <asm/tlb.h> - -#include "mca_drv.h" -#include "entry.h" -#include "irq.h" - -#if defined(IA64_MCA_DEBUG_INFO) -# define IA64_MCA_DEBUG(fmt...) printk(fmt) -#else -# define IA64_MCA_DEBUG(fmt...) do {} while (0) -#endif - -#define NOTIFY_INIT(event, regs, arg, spin) \ -do { \ - if ((notify_die((event), "INIT", (regs), (arg), 0, 0) \ - == NOTIFY_STOP) && ((spin) == 1)) \ - ia64_mca_spin(__func__); \ -} while (0) - -#define NOTIFY_MCA(event, regs, arg, spin) \ -do { \ - if ((notify_die((event), "MCA", (regs), (arg), 0, 0) \ - == NOTIFY_STOP) && ((spin) == 1)) \ - ia64_mca_spin(__func__); \ -} while (0) - -/* Used by mca_asm.S */ -DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */ -DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */ -DEFINE_PER_CPU(u64, ia64_mca_pal_pte); /* PTE to map PAL code */ -DEFINE_PER_CPU(u64, ia64_mca_pal_base); /* vaddr PAL code granule */ -DEFINE_PER_CPU(u64, ia64_mca_tr_reload); /* Flag for TR reload */ - -unsigned long __per_cpu_mca[NR_CPUS]; - -/* In mca_asm.S */ -extern void ia64_os_init_dispatch_monarch (void); -extern void ia64_os_init_dispatch_slave (void); - -static int monarch_cpu = -1; - -static ia64_mc_info_t ia64_mc_info; - -#define MAX_CPE_POLL_INTERVAL (15*60*HZ) /* 15 minutes */ -#define MIN_CPE_POLL_INTERVAL (2*60*HZ) /* 2 minutes */ -#define CMC_POLL_INTERVAL (1*60*HZ) /* 1 minute */ -#define CPE_HISTORY_LENGTH 5 -#define CMC_HISTORY_LENGTH 5 - -static struct timer_list cpe_poll_timer; -static struct timer_list cmc_poll_timer; -/* - * This variable tells whether we are currently in polling mode. - * Start with this in the wrong state so we won't play w/ timers - * before the system is ready. - */ -static int cmc_polling_enabled = 1; - -/* - * Clearing this variable prevents CPE polling from getting activated - * in mca_late_init. Use it if your system doesn't provide a CPEI, - * but encounters problems retrieving CPE logs. This should only be - * necessary for debugging. - */ -static int cpe_poll_enabled = 1; - -extern void salinfo_log_wakeup(int type, u8 *buffer, u64 size, int irqsafe); - -static int mca_init __initdata; - -/* - * limited & delayed printing support for MCA/INIT handler - */ - -#define mprintk(fmt...) ia64_mca_printk(fmt) - -#define MLOGBUF_SIZE (512+256*NR_CPUS) -#define MLOGBUF_MSGMAX 256 -static char mlogbuf[MLOGBUF_SIZE]; -static DEFINE_SPINLOCK(mlogbuf_wlock); /* mca context only */ -static DEFINE_SPINLOCK(mlogbuf_rlock); /* normal context only */ -static unsigned long mlogbuf_start; -static unsigned long mlogbuf_end; -static unsigned int mlogbuf_finished = 0; -static unsigned long mlogbuf_timestamp = 0; - -static int loglevel_save = -1; -#define BREAK_LOGLEVEL(__console_loglevel) \ - oops_in_progress = 1; \ - if (loglevel_save < 0) \ - loglevel_save = __console_loglevel; \ - __console_loglevel = 15; - -#define RESTORE_LOGLEVEL(__console_loglevel) \ - if (loglevel_save >= 0) { \ - __console_loglevel = loglevel_save; \ - loglevel_save = -1; \ - } \ - mlogbuf_finished = 0; \ - oops_in_progress = 0; - -/* - * Push messages into buffer, print them later if not urgent. - */ -void ia64_mca_printk(const char *fmt, ...) -{ - va_list args; - int printed_len; - char temp_buf[MLOGBUF_MSGMAX]; - char *p; - - va_start(args, fmt); - printed_len = vscnprintf(temp_buf, sizeof(temp_buf), fmt, args); - va_end(args); - - /* Copy the output into mlogbuf */ - if (oops_in_progress) { - /* mlogbuf was abandoned, use printk directly instead. */ - printk("%s", temp_buf); - } else { - spin_lock(&mlogbuf_wlock); - for (p = temp_buf; *p; p++) { - unsigned long next = (mlogbuf_end + 1) % MLOGBUF_SIZE; - if (next != mlogbuf_start) { - mlogbuf[mlogbuf_end] = *p; - mlogbuf_end = next; - } else { - /* buffer full */ - break; - } - } - mlogbuf[mlogbuf_end] = '\0'; - spin_unlock(&mlogbuf_wlock); - } -} -EXPORT_SYMBOL(ia64_mca_printk); - -/* - * Print buffered messages. - * NOTE: call this after returning normal context. (ex. from salinfod) - */ -void ia64_mlogbuf_dump(void) -{ - char temp_buf[MLOGBUF_MSGMAX]; - char *p; - unsigned long index; - unsigned long flags; - unsigned int printed_len; - - /* Get output from mlogbuf */ - while (mlogbuf_start != mlogbuf_end) { - temp_buf[0] = '\0'; - p = temp_buf; - printed_len = 0; - - spin_lock_irqsave(&mlogbuf_rlock, flags); - - index = mlogbuf_start; - while (index != mlogbuf_end) { - *p = mlogbuf[index]; - index = (index + 1) % MLOGBUF_SIZE; - if (!*p) - break; - p++; - if (++printed_len >= MLOGBUF_MSGMAX - 1) - break; - } - *p = '\0'; - if (temp_buf[0]) - printk("%s", temp_buf); - mlogbuf_start = index; - - mlogbuf_timestamp = 0; - spin_unlock_irqrestore(&mlogbuf_rlock, flags); - } -} -EXPORT_SYMBOL(ia64_mlogbuf_dump); - -/* - * Call this if system is going to down or if immediate flushing messages to - * console is required. (ex. recovery was failed, crash dump is going to be - * invoked, long-wait rendezvous etc.) - * NOTE: this should be called from monarch. - */ -static void ia64_mlogbuf_finish(int wait) -{ - BREAK_LOGLEVEL(console_loglevel); - - ia64_mlogbuf_dump(); - printk(KERN_EMERG "mlogbuf_finish: printing switched to urgent mode, " - "MCA/INIT might be dodgy or fail.\n"); - - if (!wait) - return; - - /* wait for console */ - printk("Delaying for 5 seconds...\n"); - udelay(5*1000000); - - mlogbuf_finished = 1; -} - -/* - * Print buffered messages from INIT context. - */ -static void ia64_mlogbuf_dump_from_init(void) -{ - if (mlogbuf_finished) - return; - - if (mlogbuf_timestamp && - time_before(jiffies, mlogbuf_timestamp + 30 * HZ)) { - printk(KERN_ERR "INIT: mlogbuf_dump is interrupted by INIT " - " and the system seems to be messed up.\n"); - ia64_mlogbuf_finish(0); - return; - } - - if (!spin_trylock(&mlogbuf_rlock)) { - printk(KERN_ERR "INIT: mlogbuf_dump is interrupted by INIT. " - "Generated messages other than stack dump will be " - "buffered to mlogbuf and will be printed later.\n"); - printk(KERN_ERR "INIT: If messages would not printed after " - "this INIT, wait 30sec and assert INIT again.\n"); - if (!mlogbuf_timestamp) - mlogbuf_timestamp = jiffies; - return; - } - spin_unlock(&mlogbuf_rlock); - ia64_mlogbuf_dump(); -} - -static inline void -ia64_mca_spin(const char *func) -{ - if (monarch_cpu == smp_processor_id()) - ia64_mlogbuf_finish(0); - mprintk(KERN_EMERG "%s: spinning here, not returning to SAL\n", func); - while (1) - cpu_relax(); -} -/* - * IA64_MCA log support - */ -#define IA64_MAX_LOGS 2 /* Double-buffering for nested MCAs */ -#define IA64_MAX_LOG_TYPES 4 /* MCA, INIT, CMC, CPE */ - -typedef struct ia64_state_log_s -{ - spinlock_t isl_lock; - int isl_index; - unsigned long isl_count; - ia64_err_rec_t *isl_log[IA64_MAX_LOGS]; /* need space to store header + error log */ -} ia64_state_log_t; - -static ia64_state_log_t ia64_state_log[IA64_MAX_LOG_TYPES]; - -#define IA64_LOG_LOCK_INIT(it) spin_lock_init(&ia64_state_log[it].isl_lock) -#define IA64_LOG_LOCK(it) spin_lock_irqsave(&ia64_state_log[it].isl_lock, s) -#define IA64_LOG_UNLOCK(it) spin_unlock_irqrestore(&ia64_state_log[it].isl_lock,s) -#define IA64_LOG_NEXT_INDEX(it) ia64_state_log[it].isl_index -#define IA64_LOG_CURR_INDEX(it) 1 - ia64_state_log[it].isl_index -#define IA64_LOG_INDEX_INC(it) \ - {ia64_state_log[it].isl_index = 1 - ia64_state_log[it].isl_index; \ - ia64_state_log[it].isl_count++;} -#define IA64_LOG_INDEX_DEC(it) \ - ia64_state_log[it].isl_index = 1 - ia64_state_log[it].isl_index -#define IA64_LOG_NEXT_BUFFER(it) (void *)((ia64_state_log[it].isl_log[IA64_LOG_NEXT_INDEX(it)])) -#define IA64_LOG_CURR_BUFFER(it) (void *)((ia64_state_log[it].isl_log[IA64_LOG_CURR_INDEX(it)])) -#define IA64_LOG_COUNT(it) ia64_state_log[it].isl_count - -static inline void ia64_log_allocate(int it, u64 size) -{ - ia64_state_log[it].isl_log[IA64_LOG_CURR_INDEX(it)] = - (ia64_err_rec_t *)memblock_alloc(size, SMP_CACHE_BYTES); - if (!ia64_state_log[it].isl_log[IA64_LOG_CURR_INDEX(it)]) - panic("%s: Failed to allocate %llu bytes\n", __func__, size); - - ia64_state_log[it].isl_log[IA64_LOG_NEXT_INDEX(it)] = - (ia64_err_rec_t *)memblock_alloc(size, SMP_CACHE_BYTES); - if (!ia64_state_log[it].isl_log[IA64_LOG_NEXT_INDEX(it)]) - panic("%s: Failed to allocate %llu bytes\n", __func__, size); -} - -/* - * ia64_log_init - * Reset the OS ia64 log buffer - * Inputs : info_type (SAL_INFO_TYPE_{MCA,INIT,CMC,CPE}) - * Outputs : None - */ -static void __init -ia64_log_init(int sal_info_type) -{ - u64 max_size = 0; - - IA64_LOG_NEXT_INDEX(sal_info_type) = 0; - IA64_LOG_LOCK_INIT(sal_info_type); - - // SAL will tell us the maximum size of any error record of this type - max_size = ia64_sal_get_state_info_size(sal_info_type); - if (!max_size) - /* alloc_bootmem() doesn't like zero-sized allocations! */ - return; - - // set up OS data structures to hold error info - ia64_log_allocate(sal_info_type, max_size); -} - -/* - * ia64_log_get - * - * Get the current MCA log from SAL and copy it into the OS log buffer. - * - * Inputs : info_type (SAL_INFO_TYPE_{MCA,INIT,CMC,CPE}) - * irq_safe whether you can use printk at this point - * Outputs : size (total record length) - * *buffer (ptr to error record) - * - */ -static u64 -ia64_log_get(int sal_info_type, u8 **buffer, int irq_safe) -{ - sal_log_record_header_t *log_buffer; - u64 total_len = 0; - unsigned long s; - - IA64_LOG_LOCK(sal_info_type); - - /* Get the process state information */ - log_buffer = IA64_LOG_NEXT_BUFFER(sal_info_type); - - total_len = ia64_sal_get_state_info(sal_info_type, (u64 *)log_buffer); - - if (total_len) { - IA64_LOG_INDEX_INC(sal_info_type); - IA64_LOG_UNLOCK(sal_info_type); - if (irq_safe) { - IA64_MCA_DEBUG("%s: SAL error record type %d retrieved. Record length = %ld\n", - __func__, sal_info_type, total_len); - } - *buffer = (u8 *) log_buffer; - return total_len; - } else { - IA64_LOG_UNLOCK(sal_info_type); - return 0; - } -} - -/* - * ia64_mca_log_sal_error_record - * - * This function retrieves a specified error record type from SAL - * and wakes up any processes waiting for error records. - * - * Inputs : sal_info_type (Type of error record MCA/CMC/CPE) - * FIXME: remove MCA and irq_safe. - */ -static void -ia64_mca_log_sal_error_record(int sal_info_type) -{ - u8 *buffer; - sal_log_record_header_t *rh; - u64 size; - int irq_safe = sal_info_type != SAL_INFO_TYPE_MCA; -#ifdef IA64_MCA_DEBUG_INFO - static const char * const rec_name[] = { "MCA", "INIT", "CMC", "CPE" }; -#endif - - size = ia64_log_get(sal_info_type, &buffer, irq_safe); - if (!size) - return; - - salinfo_log_wakeup(sal_info_type, buffer, size, irq_safe); - - if (irq_safe) - IA64_MCA_DEBUG("CPU %d: SAL log contains %s error record\n", - smp_processor_id(), - sal_info_type < ARRAY_SIZE(rec_name) ? rec_name[sal_info_type] : "UNKNOWN"); - - /* Clear logs from corrected errors in case there's no user-level logger */ - rh = (sal_log_record_header_t *)buffer; - if (rh->severity == sal_log_severity_corrected) - ia64_sal_clear_state_info(sal_info_type); -} - -/* - * search_mca_table - * See if the MCA surfaced in an instruction range - * that has been tagged as recoverable. - * - * Inputs - * first First address range to check - * last Last address range to check - * ip Instruction pointer, address we are looking for - * - * Return value: - * 1 on Success (in the table)/ 0 on Failure (not in the table) - */ -int -search_mca_table (const struct mca_table_entry *first, - const struct mca_table_entry *last, - unsigned long ip) -{ - const struct mca_table_entry *curr; - u64 curr_start, curr_end; - - curr = first; - while (curr <= last) { - curr_start = (u64) &curr->start_addr + curr->start_addr; - curr_end = (u64) &curr->end_addr + curr->end_addr; - - if ((ip >= curr_start) && (ip <= curr_end)) { - return 1; - } - curr++; - } - return 0; -} - -/* Given an address, look for it in the mca tables. */ -int mca_recover_range(unsigned long addr) -{ - extern struct mca_table_entry __start___mca_table[]; - extern struct mca_table_entry __stop___mca_table[]; - - return search_mca_table(__start___mca_table, __stop___mca_table-1, addr); -} -EXPORT_SYMBOL_GPL(mca_recover_range); - -int cpe_vector = -1; -int ia64_cpe_irq = -1; - -static irqreturn_t -ia64_mca_cpe_int_handler (int cpe_irq, void *arg) -{ - static unsigned long cpe_history[CPE_HISTORY_LENGTH]; - static int index; - static DEFINE_SPINLOCK(cpe_history_lock); - - IA64_MCA_DEBUG("%s: received interrupt vector = %#x on CPU %d\n", - __func__, cpe_irq, smp_processor_id()); - - /* SAL spec states this should run w/ interrupts enabled */ - local_irq_enable(); - - spin_lock(&cpe_history_lock); - if (!cpe_poll_enabled && cpe_vector >= 0) { - - int i, count = 1; /* we know 1 happened now */ - unsigned long now = jiffies; - - for (i = 0; i < CPE_HISTORY_LENGTH; i++) { - if (now - cpe_history[i] <= HZ) - count++; - } - - IA64_MCA_DEBUG(KERN_INFO "CPE threshold %d/%d\n", count, CPE_HISTORY_LENGTH); - if (count >= CPE_HISTORY_LENGTH) { - - cpe_poll_enabled = 1; - spin_unlock(&cpe_history_lock); - disable_irq_nosync(local_vector_to_irq(IA64_CPE_VECTOR)); - - /* - * Corrected errors will still be corrected, but - * make sure there's a log somewhere that indicates - * something is generating more than we can handle. - */ - printk(KERN_WARNING "WARNING: Switching to polling CPE handler; error records may be lost\n"); - - mod_timer(&cpe_poll_timer, jiffies + MIN_CPE_POLL_INTERVAL); - - /* lock already released, get out now */ - goto out; - } else { - cpe_history[index++] = now; - if (index == CPE_HISTORY_LENGTH) - index = 0; - } - } - spin_unlock(&cpe_history_lock); -out: - /* Get the CPE error record and log it */ - ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CPE); - - local_irq_disable(); - - return IRQ_HANDLED; -} - -/* - * ia64_mca_register_cpev - * - * Register the corrected platform error vector with SAL. - * - * Inputs - * cpev Corrected Platform Error Vector number - * - * Outputs - * None - */ -void -ia64_mca_register_cpev (int cpev) -{ - /* Register the CPE interrupt vector with SAL */ - struct ia64_sal_retval isrv; - - isrv = ia64_sal_mc_set_params(SAL_MC_PARAM_CPE_INT, SAL_MC_PARAM_MECHANISM_INT, cpev, 0, 0); - if (isrv.status) { - printk(KERN_ERR "Failed to register Corrected Platform " - "Error interrupt vector with SAL (status %ld)\n", isrv.status); - return; - } - - IA64_MCA_DEBUG("%s: corrected platform error " - "vector %#x registered\n", __func__, cpev); -} - -/* - * ia64_mca_cmc_vector_setup - * - * Setup the corrected machine check vector register in the processor. - * (The interrupt is masked on boot. ia64_mca_late_init unmask this.) - * This function is invoked on a per-processor basis. - * - * Inputs - * None - * - * Outputs - * None - */ -void -ia64_mca_cmc_vector_setup (void) -{ - cmcv_reg_t cmcv; - - cmcv.cmcv_regval = 0; - cmcv.cmcv_mask = 1; /* Mask/disable interrupt at first */ - cmcv.cmcv_vector = IA64_CMC_VECTOR; - ia64_setreg(_IA64_REG_CR_CMCV, cmcv.cmcv_regval); - - IA64_MCA_DEBUG("%s: CPU %d corrected machine check vector %#x registered.\n", - __func__, smp_processor_id(), IA64_CMC_VECTOR); - - IA64_MCA_DEBUG("%s: CPU %d CMCV = %#016lx\n", - __func__, smp_processor_id(), ia64_getreg(_IA64_REG_CR_CMCV)); -} - -/* - * ia64_mca_cmc_vector_disable - * - * Mask the corrected machine check vector register in the processor. - * This function is invoked on a per-processor basis. - * - * Inputs - * dummy(unused) - * - * Outputs - * None - */ -static void -ia64_mca_cmc_vector_disable (void *dummy) -{ - cmcv_reg_t cmcv; - - cmcv.cmcv_regval = ia64_getreg(_IA64_REG_CR_CMCV); - - cmcv.cmcv_mask = 1; /* Mask/disable interrupt */ - ia64_setreg(_IA64_REG_CR_CMCV, cmcv.cmcv_regval); - - IA64_MCA_DEBUG("%s: CPU %d corrected machine check vector %#x disabled.\n", - __func__, smp_processor_id(), cmcv.cmcv_vector); -} - -/* - * ia64_mca_cmc_vector_enable - * - * Unmask the corrected machine check vector register in the processor. - * This function is invoked on a per-processor basis. - * - * Inputs - * dummy(unused) - * - * Outputs - * None - */ -static void -ia64_mca_cmc_vector_enable (void *dummy) -{ - cmcv_reg_t cmcv; - - cmcv.cmcv_regval = ia64_getreg(_IA64_REG_CR_CMCV); - - cmcv.cmcv_mask = 0; /* Unmask/enable interrupt */ - ia64_setreg(_IA64_REG_CR_CMCV, cmcv.cmcv_regval); - - IA64_MCA_DEBUG("%s: CPU %d corrected machine check vector %#x enabled.\n", - __func__, smp_processor_id(), cmcv.cmcv_vector); -} - -/* - * ia64_mca_cmc_vector_disable_keventd - * - * Called via keventd (smp_call_function() is not safe in interrupt context) to - * disable the cmc interrupt vector. - */ -static void -ia64_mca_cmc_vector_disable_keventd(struct work_struct *unused) -{ - on_each_cpu(ia64_mca_cmc_vector_disable, NULL, 0); -} - -/* - * ia64_mca_cmc_vector_enable_keventd - * - * Called via keventd (smp_call_function() is not safe in interrupt context) to - * enable the cmc interrupt vector. - */ -static void -ia64_mca_cmc_vector_enable_keventd(struct work_struct *unused) -{ - on_each_cpu(ia64_mca_cmc_vector_enable, NULL, 0); -} - -/* - * ia64_mca_wakeup - * - * Send an inter-cpu interrupt to wake-up a particular cpu. - * - * Inputs : cpuid - * Outputs : None - */ -static void -ia64_mca_wakeup(int cpu) -{ - ia64_send_ipi(cpu, IA64_MCA_WAKEUP_VECTOR, IA64_IPI_DM_INT, 0); -} - -/* - * ia64_mca_wakeup_all - * - * Wakeup all the slave cpus which have rendez'ed previously. - * - * Inputs : None - * Outputs : None - */ -static void -ia64_mca_wakeup_all(void) -{ - int cpu; - - /* Clear the Rendez checkin flag for all cpus */ - for_each_online_cpu(cpu) { - if (ia64_mc_info.imi_rendez_checkin[cpu] == IA64_MCA_RENDEZ_CHECKIN_DONE) - ia64_mca_wakeup(cpu); - } - -} - -/* - * ia64_mca_rendez_interrupt_handler - * - * This is handler used to put slave processors into spinloop - * while the monarch processor does the mca handling and later - * wake each slave up once the monarch is done. The state - * IA64_MCA_RENDEZ_CHECKIN_DONE indicates the cpu is rendez'ed - * in SAL. The state IA64_MCA_RENDEZ_CHECKIN_NOTDONE indicates - * the cpu has come out of OS rendezvous. - * - * Inputs : None - * Outputs : None - */ -static irqreturn_t -ia64_mca_rendez_int_handler(int rendez_irq, void *arg) -{ - unsigned long flags; - int cpu = smp_processor_id(); - struct ia64_mca_notify_die nd = - { .sos = NULL, .monarch_cpu = &monarch_cpu }; - - /* Mask all interrupts */ - local_irq_save(flags); - - NOTIFY_MCA(DIE_MCA_RENDZVOUS_ENTER, get_irq_regs(), (long)&nd, 1); - - ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_DONE; - /* Register with the SAL monarch that the slave has - * reached SAL - */ - ia64_sal_mc_rendez(); - - NOTIFY_MCA(DIE_MCA_RENDZVOUS_PROCESS, get_irq_regs(), (long)&nd, 1); - - /* Wait for the monarch cpu to exit. */ - while (monarch_cpu != -1) - cpu_relax(); /* spin until monarch leaves */ - - NOTIFY_MCA(DIE_MCA_RENDZVOUS_LEAVE, get_irq_regs(), (long)&nd, 1); - - ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE; - /* Enable all interrupts */ - local_irq_restore(flags); - return IRQ_HANDLED; -} - -/* - * ia64_mca_wakeup_int_handler - * - * The interrupt handler for processing the inter-cpu interrupt to the - * slave cpu which was spinning in the rendez loop. - * Since this spinning is done by turning off the interrupts and - * polling on the wakeup-interrupt bit in the IRR, there is - * nothing useful to be done in the handler. - * - * Inputs : wakeup_irq (Wakeup-interrupt bit) - * arg (Interrupt handler specific argument) - * Outputs : None - * - */ -static irqreturn_t -ia64_mca_wakeup_int_handler(int wakeup_irq, void *arg) -{ - return IRQ_HANDLED; -} - -/* Function pointer for extra MCA recovery */ -int (*ia64_mca_ucmc_extension) - (void*,struct ia64_sal_os_state*) - = NULL; - -int -ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)) -{ - if (ia64_mca_ucmc_extension) - return 1; - - ia64_mca_ucmc_extension = fn; - return 0; -} - -void -ia64_unreg_MCA_extension(void) -{ - if (ia64_mca_ucmc_extension) - ia64_mca_ucmc_extension = NULL; -} - -EXPORT_SYMBOL(ia64_reg_MCA_extension); -EXPORT_SYMBOL(ia64_unreg_MCA_extension); - - -static inline void -copy_reg(const u64 *fr, u64 fnat, unsigned long *tr, unsigned long *tnat) -{ - u64 fslot, tslot, nat; - *tr = *fr; - fslot = ((unsigned long)fr >> 3) & 63; - tslot = ((unsigned long)tr >> 3) & 63; - *tnat &= ~(1UL << tslot); - nat = (fnat >> fslot) & 1; - *tnat |= (nat << tslot); -} - -/* Change the comm field on the MCA/INT task to include the pid that - * was interrupted, it makes for easier debugging. If that pid was 0 - * (swapper or nested MCA/INIT) then use the start of the previous comm - * field suffixed with its cpu. - */ - -static void -ia64_mca_modify_comm(const struct task_struct *previous_current) -{ - char *p, comm[sizeof(current->comm)]; - if (previous_current->pid) - snprintf(comm, sizeof(comm), "%s %d", - current->comm, previous_current->pid); - else { - int l; - if ((p = strchr(previous_current->comm, ' '))) - l = p - previous_current->comm; - else - l = strlen(previous_current->comm); - snprintf(comm, sizeof(comm), "%s %*s %d", - current->comm, l, previous_current->comm, - task_thread_info(previous_current)->cpu); - } - memcpy(current->comm, comm, sizeof(current->comm)); -} - -static void -finish_pt_regs(struct pt_regs *regs, struct ia64_sal_os_state *sos, - unsigned long *nat) -{ - const struct pal_min_state_area *ms = sos->pal_min_state; - const u64 *bank; - - /* If ipsr.ic then use pmsa_{iip,ipsr,ifs}, else use - * pmsa_{xip,xpsr,xfs} - */ - if (ia64_psr(regs)->ic) { - regs->cr_iip = ms->pmsa_iip; - regs->cr_ipsr = ms->pmsa_ipsr; - regs->cr_ifs = ms->pmsa_ifs; - } else { - regs->cr_iip = ms->pmsa_xip; - regs->cr_ipsr = ms->pmsa_xpsr; - regs->cr_ifs = ms->pmsa_xfs; - - sos->iip = ms->pmsa_iip; - sos->ipsr = ms->pmsa_ipsr; - sos->ifs = ms->pmsa_ifs; - } - regs->pr = ms->pmsa_pr; - regs->b0 = ms->pmsa_br0; - regs->ar_rsc = ms->pmsa_rsc; - copy_reg(&ms->pmsa_gr[1-1], ms->pmsa_nat_bits, ®s->r1, nat); - copy_reg(&ms->pmsa_gr[2-1], ms->pmsa_nat_bits, ®s->r2, nat); - copy_reg(&ms->pmsa_gr[3-1], ms->pmsa_nat_bits, ®s->r3, nat); - copy_reg(&ms->pmsa_gr[8-1], ms->pmsa_nat_bits, ®s->r8, nat); - copy_reg(&ms->pmsa_gr[9-1], ms->pmsa_nat_bits, ®s->r9, nat); - copy_reg(&ms->pmsa_gr[10-1], ms->pmsa_nat_bits, ®s->r10, nat); - copy_reg(&ms->pmsa_gr[11-1], ms->pmsa_nat_bits, ®s->r11, nat); - copy_reg(&ms->pmsa_gr[12-1], ms->pmsa_nat_bits, ®s->r12, nat); - copy_reg(&ms->pmsa_gr[13-1], ms->pmsa_nat_bits, ®s->r13, nat); - copy_reg(&ms->pmsa_gr[14-1], ms->pmsa_nat_bits, ®s->r14, nat); - copy_reg(&ms->pmsa_gr[15-1], ms->pmsa_nat_bits, ®s->r15, nat); - if (ia64_psr(regs)->bn) - bank = ms->pmsa_bank1_gr; - else - bank = ms->pmsa_bank0_gr; - copy_reg(&bank[16-16], ms->pmsa_nat_bits, ®s->r16, nat); - copy_reg(&bank[17-16], ms->pmsa_nat_bits, ®s->r17, nat); - copy_reg(&bank[18-16], ms->pmsa_nat_bits, ®s->r18, nat); - copy_reg(&bank[19-16], ms->pmsa_nat_bits, ®s->r19, nat); - copy_reg(&bank[20-16], ms->pmsa_nat_bits, ®s->r20, nat); - copy_reg(&bank[21-16], ms->pmsa_nat_bits, ®s->r21, nat); - copy_reg(&bank[22-16], ms->pmsa_nat_bits, ®s->r22, nat); - copy_reg(&bank[23-16], ms->pmsa_nat_bits, ®s->r23, nat); - copy_reg(&bank[24-16], ms->pmsa_nat_bits, ®s->r24, nat); - copy_reg(&bank[25-16], ms->pmsa_nat_bits, ®s->r25, nat); - copy_reg(&bank[26-16], ms->pmsa_nat_bits, ®s->r26, nat); - copy_reg(&bank[27-16], ms->pmsa_nat_bits, ®s->r27, nat); - copy_reg(&bank[28-16], ms->pmsa_nat_bits, ®s->r28, nat); - copy_reg(&bank[29-16], ms->pmsa_nat_bits, ®s->r29, nat); - copy_reg(&bank[30-16], ms->pmsa_nat_bits, ®s->r30, nat); - copy_reg(&bank[31-16], ms->pmsa_nat_bits, ®s->r31, nat); -} - -/* On entry to this routine, we are running on the per cpu stack, see - * mca_asm.h. The original stack has not been touched by this event. Some of - * the original stack's registers will be in the RBS on this stack. This stack - * also contains a partial pt_regs and switch_stack, the rest of the data is in - * PAL minstate. - * - * The first thing to do is modify the original stack to look like a blocked - * task so we can run backtrace on the original task. Also mark the per cpu - * stack as current to ensure that we use the correct task state, it also means - * that we can do backtrace on the MCA/INIT handler code itself. - */ - -static struct task_struct * -ia64_mca_modify_original_stack(struct pt_regs *regs, - const struct switch_stack *sw, - struct ia64_sal_os_state *sos, - const char *type) -{ - char *p; - ia64_va va; - extern char ia64_leave_kernel[]; /* Need asm address, not function descriptor */ - const struct pal_min_state_area *ms = sos->pal_min_state; - struct task_struct *previous_current; - struct pt_regs *old_regs; - struct switch_stack *old_sw; - unsigned size = sizeof(struct pt_regs) + - sizeof(struct switch_stack) + 16; - unsigned long *old_bspstore, *old_bsp; - unsigned long *new_bspstore, *new_bsp; - unsigned long old_unat, old_rnat, new_rnat, nat; - u64 slots, loadrs = regs->loadrs; - u64 r12 = ms->pmsa_gr[12-1], r13 = ms->pmsa_gr[13-1]; - u64 ar_bspstore = regs->ar_bspstore; - u64 ar_bsp = regs->ar_bspstore + (loadrs >> 16); - const char *msg; - int cpu = smp_processor_id(); - - previous_current = curr_task(cpu); - ia64_set_curr_task(cpu, current); - if ((p = strchr(current->comm, ' '))) - *p = '\0'; - - /* Best effort attempt to cope with MCA/INIT delivered while in - * physical mode. - */ - regs->cr_ipsr = ms->pmsa_ipsr; - if (ia64_psr(regs)->dt == 0) { - va.l = r12; - if (va.f.reg == 0) { - va.f.reg = 7; - r12 = va.l; - } - va.l = r13; - if (va.f.reg == 0) { - va.f.reg = 7; - r13 = va.l; - } - } - if (ia64_psr(regs)->rt == 0) { - va.l = ar_bspstore; - if (va.f.reg == 0) { - va.f.reg = 7; - ar_bspstore = va.l; - } - va.l = ar_bsp; - if (va.f.reg == 0) { - va.f.reg = 7; - ar_bsp = va.l; - } - } - - /* mca_asm.S ia64_old_stack() cannot assume that the dirty registers - * have been copied to the old stack, the old stack may fail the - * validation tests below. So ia64_old_stack() must restore the dirty - * registers from the new stack. The old and new bspstore probably - * have different alignments, so loadrs calculated on the old bsp - * cannot be used to restore from the new bsp. Calculate a suitable - * loadrs for the new stack and save it in the new pt_regs, where - * ia64_old_stack() can get it. - */ - old_bspstore = (unsigned long *)ar_bspstore; - old_bsp = (unsigned long *)ar_bsp; - slots = ia64_rse_num_regs(old_bspstore, old_bsp); - new_bspstore = (unsigned long *)((u64)current + IA64_RBS_OFFSET); - new_bsp = ia64_rse_skip_regs(new_bspstore, slots); - regs->loadrs = (new_bsp - new_bspstore) * 8 << 16; - - /* Verify the previous stack state before we change it */ - if (user_mode(regs)) { - msg = "occurred in user space"; - /* previous_current is guaranteed to be valid when the task was - * in user space, so ... - */ - ia64_mca_modify_comm(previous_current); - goto no_mod; - } - - if (r13 != sos->prev_IA64_KR_CURRENT) { - msg = "inconsistent previous current and r13"; - goto no_mod; - } - - if (!mca_recover_range(ms->pmsa_iip)) { - if ((r12 - r13) >= KERNEL_STACK_SIZE) { - msg = "inconsistent r12 and r13"; - goto no_mod; - } - if ((ar_bspstore - r13) >= KERNEL_STACK_SIZE) { - msg = "inconsistent ar.bspstore and r13"; - goto no_mod; - } - va.p = old_bspstore; - if (va.f.reg < 5) { - msg = "old_bspstore is in the wrong region"; - goto no_mod; - } - if ((ar_bsp - r13) >= KERNEL_STACK_SIZE) { - msg = "inconsistent ar.bsp and r13"; - goto no_mod; - } - size += (ia64_rse_skip_regs(old_bspstore, slots) - old_bspstore) * 8; - if (ar_bspstore + size > r12) { - msg = "no room for blocked state"; - goto no_mod; - } - } - - ia64_mca_modify_comm(previous_current); - - /* Make the original task look blocked. First stack a struct pt_regs, - * describing the state at the time of interrupt. mca_asm.S built a - * partial pt_regs, copy it and fill in the blanks using minstate. - */ - p = (char *)r12 - sizeof(*regs); - old_regs = (struct pt_regs *)p; - memcpy(old_regs, regs, sizeof(*regs)); - old_regs->loadrs = loadrs; - old_unat = old_regs->ar_unat; - finish_pt_regs(old_regs, sos, &old_unat); - - /* Next stack a struct switch_stack. mca_asm.S built a partial - * switch_stack, copy it and fill in the blanks using pt_regs and - * minstate. - * - * In the synthesized switch_stack, b0 points to ia64_leave_kernel, - * ar.pfs is set to 0. - * - * unwind.c::unw_unwind() does special processing for interrupt frames. - * It checks if the PRED_NON_SYSCALL predicate is set, if the predicate - * is clear then unw_unwind() does _not_ adjust bsp over pt_regs. Not - * that this is documented, of course. Set PRED_NON_SYSCALL in the - * switch_stack on the original stack so it will unwind correctly when - * unwind.c reads pt_regs. - * - * thread.ksp is updated to point to the synthesized switch_stack. - */ - p -= sizeof(struct switch_stack); - old_sw = (struct switch_stack *)p; - memcpy(old_sw, sw, sizeof(*sw)); - old_sw->caller_unat = old_unat; - old_sw->ar_fpsr = old_regs->ar_fpsr; - copy_reg(&ms->pmsa_gr[4-1], ms->pmsa_nat_bits, &old_sw->r4, &old_unat); - copy_reg(&ms->pmsa_gr[5-1], ms->pmsa_nat_bits, &old_sw->r5, &old_unat); - copy_reg(&ms->pmsa_gr[6-1], ms->pmsa_nat_bits, &old_sw->r6, &old_unat); - copy_reg(&ms->pmsa_gr[7-1], ms->pmsa_nat_bits, &old_sw->r7, &old_unat); - old_sw->b0 = (u64)ia64_leave_kernel; - old_sw->b1 = ms->pmsa_br1; - old_sw->ar_pfs = 0; - old_sw->ar_unat = old_unat; - old_sw->pr = old_regs->pr | (1UL << PRED_NON_SYSCALL); - previous_current->thread.ksp = (u64)p - 16; - - /* Finally copy the original stack's registers back to its RBS. - * Registers from ar.bspstore through ar.bsp at the time of the event - * are in the current RBS, copy them back to the original stack. The - * copy must be done register by register because the original bspstore - * and the current one have different alignments, so the saved RNAT - * data occurs at different places. - * - * mca_asm does cover, so the old_bsp already includes all registers at - * the time of MCA/INIT. It also does flushrs, so all registers before - * this function have been written to backing store on the MCA/INIT - * stack. - */ - new_rnat = ia64_get_rnat(ia64_rse_rnat_addr(new_bspstore)); - old_rnat = regs->ar_rnat; - while (slots--) { - if (ia64_rse_is_rnat_slot(new_bspstore)) { - new_rnat = ia64_get_rnat(new_bspstore++); - } - if (ia64_rse_is_rnat_slot(old_bspstore)) { - *old_bspstore++ = old_rnat; - old_rnat = 0; - } - nat = (new_rnat >> ia64_rse_slot_num(new_bspstore)) & 1UL; - old_rnat &= ~(1UL << ia64_rse_slot_num(old_bspstore)); - old_rnat |= (nat << ia64_rse_slot_num(old_bspstore)); - *old_bspstore++ = *new_bspstore++; - } - old_sw->ar_bspstore = (unsigned long)old_bspstore; - old_sw->ar_rnat = old_rnat; - - sos->prev_task = previous_current; - return previous_current; - -no_mod: - mprintk(KERN_INFO "cpu %d, %s %s, original stack not modified\n", - smp_processor_id(), type, msg); - old_unat = regs->ar_unat; - finish_pt_regs(regs, sos, &old_unat); - return previous_current; -} - -/* The monarch/slave interaction is based on monarch_cpu and requires that all - * slaves have entered rendezvous before the monarch leaves. If any cpu has - * not entered rendezvous yet then wait a bit. The assumption is that any - * slave that has not rendezvoused after a reasonable time is never going to do - * so. In this context, slave includes cpus that respond to the MCA rendezvous - * interrupt, as well as cpus that receive the INIT slave event. - */ - -static void -ia64_wait_for_slaves(int monarch, const char *type) -{ - int c, i , wait; - - /* - * wait 5 seconds total for slaves (arbitrary) - */ - for (i = 0; i < 5000; i++) { - wait = 0; - for_each_online_cpu(c) { - if (c == monarch) - continue; - if (ia64_mc_info.imi_rendez_checkin[c] - == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) { - udelay(1000); /* short wait */ - wait = 1; - break; - } - } - if (!wait) - goto all_in; - } - - /* - * Maybe slave(s) dead. Print buffered messages immediately. - */ - ia64_mlogbuf_finish(0); - mprintk(KERN_INFO "OS %s slave did not rendezvous on cpu", type); - for_each_online_cpu(c) { - if (c == monarch) - continue; - if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) - mprintk(" %d", c); - } - mprintk("\n"); - return; - -all_in: - mprintk(KERN_INFO "All OS %s slaves have reached rendezvous\n", type); - return; -} - -/* mca_insert_tr - * - * Switch rid when TR reload and needed! - * iord: 1: itr, 2: itr; - * -*/ -static void mca_insert_tr(u64 iord) -{ - - int i; - u64 old_rr; - struct ia64_tr_entry *p; - unsigned long psr; - int cpu = smp_processor_id(); - - if (!ia64_idtrs[cpu]) - return; - - psr = ia64_clear_ic(); - for (i = IA64_TR_ALLOC_BASE; i < IA64_TR_ALLOC_MAX; i++) { - p = ia64_idtrs[cpu] + (iord - 1) * IA64_TR_ALLOC_MAX; - if (p->pte & 0x1) { - old_rr = ia64_get_rr(p->ifa); - if (old_rr != p->rr) { - ia64_set_rr(p->ifa, p->rr); - ia64_srlz_d(); - } - ia64_ptr(iord, p->ifa, p->itir >> 2); - ia64_srlz_i(); - if (iord & 0x1) { - ia64_itr(0x1, i, p->ifa, p->pte, p->itir >> 2); - ia64_srlz_i(); - } - if (iord & 0x2) { - ia64_itr(0x2, i, p->ifa, p->pte, p->itir >> 2); - ia64_srlz_i(); - } - if (old_rr != p->rr) { - ia64_set_rr(p->ifa, old_rr); - ia64_srlz_d(); - } - } - } - ia64_set_psr(psr); -} - -/* - * ia64_mca_handler - * - * This is uncorrectable machine check handler called from OS_MCA - * dispatch code which is in turn called from SAL_CHECK(). - * This is the place where the core of OS MCA handling is done. - * Right now the logs are extracted and displayed in a well-defined - * format. This handler code is supposed to be run only on the - * monarch processor. Once the monarch is done with MCA handling - * further MCA logging is enabled by clearing logs. - * Monarch also has the duty of sending wakeup-IPIs to pull the - * slave processors out of rendezvous spinloop. - * - * If multiple processors call into OS_MCA, the first will become - * the monarch. Subsequent cpus will be recorded in the mca_cpu - * bitmask. After the first monarch has processed its MCA, it - * will wake up the next cpu in the mca_cpu bitmask and then go - * into the rendezvous loop. When all processors have serviced - * their MCA, the last monarch frees up the rest of the processors. - */ -void -ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw, - struct ia64_sal_os_state *sos) -{ - int recover, cpu = smp_processor_id(); - struct task_struct *previous_current; - struct ia64_mca_notify_die nd = - { .sos = sos, .monarch_cpu = &monarch_cpu, .data = &recover }; - static atomic_t mca_count; - static cpumask_t mca_cpu; - - if (atomic_add_return(1, &mca_count) == 1) { - monarch_cpu = cpu; - sos->monarch = 1; - } else { - cpumask_set_cpu(cpu, &mca_cpu); - sos->monarch = 0; - } - mprintk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d " - "monarch=%ld\n", sos->proc_state_param, cpu, sos->monarch); - - previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA"); - - NOTIFY_MCA(DIE_MCA_MONARCH_ENTER, regs, (long)&nd, 1); - - ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA; - if (sos->monarch) { - ia64_wait_for_slaves(cpu, "MCA"); - - /* Wakeup all the processors which are spinning in the - * rendezvous loop. They will leave SAL, then spin in the OS - * with interrupts disabled until this monarch cpu leaves the - * MCA handler. That gets control back to the OS so we can - * backtrace the other cpus, backtrace when spinning in SAL - * does not work. - */ - ia64_mca_wakeup_all(); - } else { - while (cpumask_test_cpu(cpu, &mca_cpu)) - cpu_relax(); /* spin until monarch wakes us */ - } - - NOTIFY_MCA(DIE_MCA_MONARCH_PROCESS, regs, (long)&nd, 1); - - /* Get the MCA error record and log it */ - ia64_mca_log_sal_error_record(SAL_INFO_TYPE_MCA); - - /* MCA error recovery */ - recover = (ia64_mca_ucmc_extension - && ia64_mca_ucmc_extension( - IA64_LOG_CURR_BUFFER(SAL_INFO_TYPE_MCA), - sos)); - - if (recover) { - sal_log_record_header_t *rh = IA64_LOG_CURR_BUFFER(SAL_INFO_TYPE_MCA); - rh->severity = sal_log_severity_corrected; - ia64_sal_clear_state_info(SAL_INFO_TYPE_MCA); - sos->os_status = IA64_MCA_CORRECTED; - } else { - /* Dump buffered message to console */ - ia64_mlogbuf_finish(1); - } - - if (__this_cpu_read(ia64_mca_tr_reload)) { - mca_insert_tr(0x1); /*Reload dynamic itrs*/ - mca_insert_tr(0x2); /*Reload dynamic itrs*/ - } - - NOTIFY_MCA(DIE_MCA_MONARCH_LEAVE, regs, (long)&nd, 1); - - if (atomic_dec_return(&mca_count) > 0) { - int i; - - /* wake up the next monarch cpu, - * and put this cpu in the rendez loop. - */ - for_each_online_cpu(i) { - if (cpumask_test_cpu(i, &mca_cpu)) { - monarch_cpu = i; - cpumask_clear_cpu(i, &mca_cpu); /* wake next cpu */ - while (monarch_cpu != -1) - cpu_relax(); /* spin until last cpu leaves */ - ia64_set_curr_task(cpu, previous_current); - ia64_mc_info.imi_rendez_checkin[cpu] - = IA64_MCA_RENDEZ_CHECKIN_NOTDONE; - return; - } - } - } - ia64_set_curr_task(cpu, previous_current); - ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE; - monarch_cpu = -1; /* This frees the slaves and previous monarchs */ -} - -static DECLARE_WORK(cmc_disable_work, ia64_mca_cmc_vector_disable_keventd); -static DECLARE_WORK(cmc_enable_work, ia64_mca_cmc_vector_enable_keventd); - -/* - * ia64_mca_cmc_int_handler - * - * This is corrected machine check interrupt handler. - * Right now the logs are extracted and displayed in a well-defined - * format. - * - * Inputs - * interrupt number - * client data arg ptr - * - * Outputs - * None - */ -static irqreturn_t -ia64_mca_cmc_int_handler(int cmc_irq, void *arg) -{ - static unsigned long cmc_history[CMC_HISTORY_LENGTH]; - static int index; - static DEFINE_SPINLOCK(cmc_history_lock); - - IA64_MCA_DEBUG("%s: received interrupt vector = %#x on CPU %d\n", - __func__, cmc_irq, smp_processor_id()); - - /* SAL spec states this should run w/ interrupts enabled */ - local_irq_enable(); - - spin_lock(&cmc_history_lock); - if (!cmc_polling_enabled) { - int i, count = 1; /* we know 1 happened now */ - unsigned long now = jiffies; - - for (i = 0; i < CMC_HISTORY_LENGTH; i++) { - if (now - cmc_history[i] <= HZ) - count++; - } - - IA64_MCA_DEBUG(KERN_INFO "CMC threshold %d/%d\n", count, CMC_HISTORY_LENGTH); - if (count >= CMC_HISTORY_LENGTH) { - - cmc_polling_enabled = 1; - spin_unlock(&cmc_history_lock); - /* If we're being hit with CMC interrupts, we won't - * ever execute the schedule_work() below. Need to - * disable CMC interrupts on this processor now. - */ - ia64_mca_cmc_vector_disable(NULL); - schedule_work(&cmc_disable_work); - - /* - * Corrected errors will still be corrected, but - * make sure there's a log somewhere that indicates - * something is generating more than we can handle. - */ - printk(KERN_WARNING "WARNING: Switching to polling CMC handler; error records may be lost\n"); - - mod_timer(&cmc_poll_timer, jiffies + CMC_POLL_INTERVAL); - - /* lock already released, get out now */ - goto out; - } else { - cmc_history[index++] = now; - if (index == CMC_HISTORY_LENGTH) - index = 0; - } - } - spin_unlock(&cmc_history_lock); -out: - /* Get the CMC error record and log it */ - ia64_mca_log_sal_error_record(SAL_INFO_TYPE_CMC); - - local_irq_disable(); - - return IRQ_HANDLED; -} - -/* - * ia64_mca_cmc_int_caller - * - * Triggered by sw interrupt from CMC polling routine. Calls - * real interrupt handler and either triggers a sw interrupt - * on the next cpu or does cleanup at the end. - * - * Inputs - * interrupt number - * client data arg ptr - * Outputs - * handled - */ -static irqreturn_t -ia64_mca_cmc_int_caller(int cmc_irq, void *arg) -{ - static int start_count = -1; - unsigned int cpuid; - - cpuid = smp_processor_id(); - - /* If first cpu, update count */ - if (start_count == -1) - start_count = IA64_LOG_COUNT(SAL_INFO_TYPE_CMC); - - ia64_mca_cmc_int_handler(cmc_irq, arg); - - cpuid = cpumask_next(cpuid+1, cpu_online_mask); - - if (cpuid < nr_cpu_ids) { - ia64_send_ipi(cpuid, IA64_CMCP_VECTOR, IA64_IPI_DM_INT, 0); - } else { - /* If no log record, switch out of polling mode */ - if (start_count == IA64_LOG_COUNT(SAL_INFO_TYPE_CMC)) { - - printk(KERN_WARNING "Returning to interrupt driven CMC handler\n"); - schedule_work(&cmc_enable_work); - cmc_polling_enabled = 0; - - } else { - - mod_timer(&cmc_poll_timer, jiffies + CMC_POLL_INTERVAL); - } - - start_count = -1; - } - - return IRQ_HANDLED; -} - -/* - * ia64_mca_cmc_poll - * - * Poll for Corrected Machine Checks (CMCs) - * - * Inputs : dummy(unused) - * Outputs : None - * - */ -static void -ia64_mca_cmc_poll (struct timer_list *unused) -{ - /* Trigger a CMC interrupt cascade */ - ia64_send_ipi(cpumask_first(cpu_online_mask), IA64_CMCP_VECTOR, - IA64_IPI_DM_INT, 0); -} - -/* - * ia64_mca_cpe_int_caller - * - * Triggered by sw interrupt from CPE polling routine. Calls - * real interrupt handler and either triggers a sw interrupt - * on the next cpu or does cleanup at the end. - * - * Inputs - * interrupt number - * client data arg ptr - * Outputs - * handled - */ -static irqreturn_t -ia64_mca_cpe_int_caller(int cpe_irq, void *arg) -{ - static int start_count = -1; - static int poll_time = MIN_CPE_POLL_INTERVAL; - unsigned int cpuid; - - cpuid = smp_processor_id(); - - /* If first cpu, update count */ - if (start_count == -1) - start_count = IA64_LOG_COUNT(SAL_INFO_TYPE_CPE); - - ia64_mca_cpe_int_handler(cpe_irq, arg); - - cpuid = cpumask_next(cpuid+1, cpu_online_mask); - - if (cpuid < NR_CPUS) { - ia64_send_ipi(cpuid, IA64_CPEP_VECTOR, IA64_IPI_DM_INT, 0); - } else { - /* - * If a log was recorded, increase our polling frequency, - * otherwise, backoff or return to interrupt mode. - */ - if (start_count != IA64_LOG_COUNT(SAL_INFO_TYPE_CPE)) { - poll_time = max(MIN_CPE_POLL_INTERVAL, poll_time / 2); - } else if (cpe_vector < 0) { - poll_time = min(MAX_CPE_POLL_INTERVAL, poll_time * 2); - } else { - poll_time = MIN_CPE_POLL_INTERVAL; - - printk(KERN_WARNING "Returning to interrupt driven CPE handler\n"); - enable_irq(local_vector_to_irq(IA64_CPE_VECTOR)); - cpe_poll_enabled = 0; - } - - if (cpe_poll_enabled) - mod_timer(&cpe_poll_timer, jiffies + poll_time); - start_count = -1; - } - - return IRQ_HANDLED; -} - -/* - * ia64_mca_cpe_poll - * - * Poll for Corrected Platform Errors (CPEs), trigger interrupt - * on first cpu, from there it will trickle through all the cpus. - * - * Inputs : dummy(unused) - * Outputs : None - * - */ -static void -ia64_mca_cpe_poll (struct timer_list *unused) -{ - /* Trigger a CPE interrupt cascade */ - ia64_send_ipi(cpumask_first(cpu_online_mask), IA64_CPEP_VECTOR, - IA64_IPI_DM_INT, 0); -} - -static int -default_monarch_init_process(struct notifier_block *self, unsigned long val, void *data) -{ - int c; - struct task_struct *g, *t; - if (val != DIE_INIT_MONARCH_PROCESS) - return NOTIFY_DONE; -#ifdef CONFIG_KEXEC - if (atomic_read(&kdump_in_progress)) - return NOTIFY_DONE; -#endif - - /* - * FIXME: mlogbuf will brim over with INIT stack dumps. - * To enable show_stack from INIT, we use oops_in_progress which should - * be used in real oops. This would cause something wrong after INIT. - */ - BREAK_LOGLEVEL(console_loglevel); - ia64_mlogbuf_dump_from_init(); - - printk(KERN_ERR "Processes interrupted by INIT -"); - for_each_online_cpu(c) { - struct ia64_sal_os_state *s; - t = __va(__per_cpu_mca[c] + IA64_MCA_CPU_INIT_STACK_OFFSET); - s = (struct ia64_sal_os_state *)((char *)t + MCA_SOS_OFFSET); - g = s->prev_task; - if (g) { - if (g->pid) - printk(" %d", g->pid); - else - printk(" %d (cpu %d task 0x%p)", g->pid, task_cpu(g), g); - } - } - printk("\n\n"); - if (read_trylock(&tasklist_lock)) { - for_each_process_thread(g, t) { - printk("\nBacktrace of pid %d (%s)\n", t->pid, t->comm); - show_stack(t, NULL, KERN_DEFAULT); - } - read_unlock(&tasklist_lock); - } - /* FIXME: This will not restore zapped printk locks. */ - RESTORE_LOGLEVEL(console_loglevel); - return NOTIFY_DONE; -} - -/* - * C portion of the OS INIT handler - * - * Called from ia64_os_init_dispatch - * - * Inputs: pointer to pt_regs where processor info was saved. SAL/OS state for - * this event. This code is used for both monarch and slave INIT events, see - * sos->monarch. - * - * All INIT events switch to the INIT stack and change the previous process to - * blocked status. If one of the INIT events is the monarch then we are - * probably processing the nmi button/command. Use the monarch cpu to dump all - * the processes. The slave INIT events all spin until the monarch cpu - * returns. We can also get INIT slave events for MCA, in which case the MCA - * process is the monarch. - */ - -void -ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw, - struct ia64_sal_os_state *sos) -{ - static atomic_t slaves; - static atomic_t monarchs; - struct task_struct *previous_current; - int cpu = smp_processor_id(); - struct ia64_mca_notify_die nd = - { .sos = sos, .monarch_cpu = &monarch_cpu }; - - NOTIFY_INIT(DIE_INIT_ENTER, regs, (long)&nd, 0); - - mprintk(KERN_INFO "Entered OS INIT handler. PSP=%lx cpu=%d monarch=%ld\n", - sos->proc_state_param, cpu, sos->monarch); - salinfo_log_wakeup(SAL_INFO_TYPE_INIT, NULL, 0, 0); - - previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "INIT"); - sos->os_status = IA64_INIT_RESUME; - - /* FIXME: Workaround for broken proms that drive all INIT events as - * slaves. The last slave that enters is promoted to be a monarch. - * Remove this code in September 2006, that gives platforms a year to - * fix their proms and get their customers updated. - */ - if (!sos->monarch && atomic_add_return(1, &slaves) == num_online_cpus()) { - mprintk(KERN_WARNING "%s: Promoting cpu %d to monarch.\n", - __func__, cpu); - atomic_dec(&slaves); - sos->monarch = 1; - } - - /* FIXME: Workaround for broken proms that drive all INIT events as - * monarchs. Second and subsequent monarchs are demoted to slaves. - * Remove this code in September 2006, that gives platforms a year to - * fix their proms and get their customers updated. - */ - if (sos->monarch && atomic_add_return(1, &monarchs) > 1) { - mprintk(KERN_WARNING "%s: Demoting cpu %d to slave.\n", - __func__, cpu); - atomic_dec(&monarchs); - sos->monarch = 0; - } - - if (!sos->monarch) { - ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_INIT; - -#ifdef CONFIG_KEXEC - while (monarch_cpu == -1 && !atomic_read(&kdump_in_progress)) - udelay(1000); -#else - while (monarch_cpu == -1) - cpu_relax(); /* spin until monarch enters */ -#endif - - NOTIFY_INIT(DIE_INIT_SLAVE_ENTER, regs, (long)&nd, 1); - NOTIFY_INIT(DIE_INIT_SLAVE_PROCESS, regs, (long)&nd, 1); - -#ifdef CONFIG_KEXEC - while (monarch_cpu != -1 && !atomic_read(&kdump_in_progress)) - udelay(1000); -#else - while (monarch_cpu != -1) - cpu_relax(); /* spin until monarch leaves */ -#endif - - NOTIFY_INIT(DIE_INIT_SLAVE_LEAVE, regs, (long)&nd, 1); - - mprintk("Slave on cpu %d returning to normal service.\n", cpu); - ia64_set_curr_task(cpu, previous_current); - ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE; - atomic_dec(&slaves); - return; - } - - monarch_cpu = cpu; - NOTIFY_INIT(DIE_INIT_MONARCH_ENTER, regs, (long)&nd, 1); - - /* - * Wait for a bit. On some machines (e.g., HP's zx2000 and zx6000, INIT can be - * generated via the BMC's command-line interface, but since the console is on the - * same serial line, the user will need some time to switch out of the BMC before - * the dump begins. - */ - mprintk("Delaying for 5 seconds...\n"); - udelay(5*1000000); - ia64_wait_for_slaves(cpu, "INIT"); - /* If nobody intercepts DIE_INIT_MONARCH_PROCESS then we drop through - * to default_monarch_init_process() above and just print all the - * tasks. - */ - NOTIFY_INIT(DIE_INIT_MONARCH_PROCESS, regs, (long)&nd, 1); - NOTIFY_INIT(DIE_INIT_MONARCH_LEAVE, regs, (long)&nd, 1); - - mprintk("\nINIT dump complete. Monarch on cpu %d returning to normal service.\n", cpu); - atomic_dec(&monarchs); - ia64_set_curr_task(cpu, previous_current); - monarch_cpu = -1; - return; -} - -static int __init -ia64_mca_disable_cpe_polling(char *str) -{ - cpe_poll_enabled = 0; - return 1; -} - -__setup("disable_cpe_poll", ia64_mca_disable_cpe_polling); - -/* Minimal format of the MCA/INIT stacks. The pseudo processes that run on - * these stacks can never sleep, they cannot return from the kernel to user - * space, they do not appear in a normal ps listing. So there is no need to - * format most of the fields. - */ - -static void -format_mca_init_stack(void *mca_data, unsigned long offset, - const char *type, int cpu) -{ - struct task_struct *p = (struct task_struct *)((char *)mca_data + offset); - struct thread_info *ti; - memset(p, 0, KERNEL_STACK_SIZE); - ti = task_thread_info(p); - ti->flags = _TIF_MCA_INIT; - ti->preempt_count = 1; - ti->task = p; - ti->cpu = cpu; - p->stack = ti; - p->__state = TASK_UNINTERRUPTIBLE; - cpumask_set_cpu(cpu, &p->cpus_mask); - INIT_LIST_HEAD(&p->tasks); - p->parent = p->real_parent = p->group_leader = p; - INIT_LIST_HEAD(&p->children); - INIT_LIST_HEAD(&p->sibling); - strscpy(p->comm, type, sizeof(p->comm)-1); -} - -/* Caller prevents this from being called after init */ -static void * __ref mca_bootmem(void) -{ - return memblock_alloc(sizeof(struct ia64_mca_cpu), KERNEL_STACK_SIZE); -} - -/* Do per-CPU MCA-related initialization. */ -void -ia64_mca_cpu_init(void *cpu_data) -{ - void *pal_vaddr; - void *data; - long sz = sizeof(struct ia64_mca_cpu); - int cpu = smp_processor_id(); - static int first_time = 1; - - /* - * Structure will already be allocated if cpu has been online, - * then offlined. - */ - if (__per_cpu_mca[cpu]) { - data = __va(__per_cpu_mca[cpu]); - } else { - if (first_time) { - data = mca_bootmem(); - first_time = 0; - } else - data = (void *)__get_free_pages(GFP_ATOMIC, - get_order(sz)); - if (!data) - panic("Could not allocate MCA memory for cpu %d\n", - cpu); - } - format_mca_init_stack(data, offsetof(struct ia64_mca_cpu, mca_stack), - "MCA", cpu); - format_mca_init_stack(data, offsetof(struct ia64_mca_cpu, init_stack), - "INIT", cpu); - __this_cpu_write(ia64_mca_data, (__per_cpu_mca[cpu] = __pa(data))); - - /* - * Stash away a copy of the PTE needed to map the per-CPU page. - * We may need it during MCA recovery. - */ - __this_cpu_write(ia64_mca_per_cpu_pte, - pte_val(mk_pte_phys(__pa(cpu_data), PAGE_KERNEL))); - - /* - * Also, stash away a copy of the PAL address and the PTE - * needed to map it. - */ - pal_vaddr = efi_get_pal_addr(); - if (!pal_vaddr) - return; - __this_cpu_write(ia64_mca_pal_base, - GRANULEROUNDDOWN((unsigned long) pal_vaddr)); - __this_cpu_write(ia64_mca_pal_pte, pte_val(mk_pte_phys(__pa(pal_vaddr), - PAGE_KERNEL))); -} - -static int ia64_mca_cpu_online(unsigned int cpu) -{ - unsigned long flags; - - local_irq_save(flags); - if (!cmc_polling_enabled) - ia64_mca_cmc_vector_enable(NULL); - local_irq_restore(flags); - return 0; -} - -/* - * ia64_mca_init - * - * Do all the system level mca specific initialization. - * - * 1. Register spinloop and wakeup request interrupt vectors - * - * 2. Register OS_MCA handler entry point - * - * 3. Register OS_INIT handler entry point - * - * 4. Initialize MCA/CMC/INIT related log buffers maintained by the OS. - * - * Note that this initialization is done very early before some kernel - * services are available. - * - * Inputs : None - * - * Outputs : None - */ -void __init -ia64_mca_init(void) -{ - ia64_fptr_t *init_hldlr_ptr_monarch = (ia64_fptr_t *)ia64_os_init_dispatch_monarch; - ia64_fptr_t *init_hldlr_ptr_slave = (ia64_fptr_t *)ia64_os_init_dispatch_slave; - ia64_fptr_t *mca_hldlr_ptr = (ia64_fptr_t *)ia64_os_mca_dispatch; - int i; - long rc; - struct ia64_sal_retval isrv; - unsigned long timeout = IA64_MCA_RENDEZ_TIMEOUT; /* platform specific */ - static struct notifier_block default_init_monarch_nb = { - .notifier_call = default_monarch_init_process, - .priority = 0/* we need to notified last */ - }; - - IA64_MCA_DEBUG("%s: begin\n", __func__); - - /* Clear the Rendez checkin flag for all cpus */ - for(i = 0 ; i < NR_CPUS; i++) - ia64_mc_info.imi_rendez_checkin[i] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE; - - /* - * Register the rendezvous spinloop and wakeup mechanism with SAL - */ - - /* Register the rendezvous interrupt vector with SAL */ - while (1) { - isrv = ia64_sal_mc_set_params(SAL_MC_PARAM_RENDEZ_INT, - SAL_MC_PARAM_MECHANISM_INT, - IA64_MCA_RENDEZ_VECTOR, - timeout, - SAL_MC_PARAM_RZ_ALWAYS); - rc = isrv.status; - if (rc == 0) - break; - if (rc == -2) { - printk(KERN_INFO "Increasing MCA rendezvous timeout from " - "%ld to %ld milliseconds\n", timeout, isrv.v0); - timeout = isrv.v0; - NOTIFY_MCA(DIE_MCA_NEW_TIMEOUT, NULL, timeout, 0); - continue; - } - printk(KERN_ERR "Failed to register rendezvous interrupt " - "with SAL (status %ld)\n", rc); - return; - } - - /* Register the wakeup interrupt vector with SAL */ - isrv = ia64_sal_mc_set_params(SAL_MC_PARAM_RENDEZ_WAKEUP, - SAL_MC_PARAM_MECHANISM_INT, - IA64_MCA_WAKEUP_VECTOR, - 0, 0); - rc = isrv.status; - if (rc) { - printk(KERN_ERR "Failed to register wakeup interrupt with SAL " - "(status %ld)\n", rc); - return; - } - - IA64_MCA_DEBUG("%s: registered MCA rendezvous spinloop and wakeup mech.\n", __func__); - - ia64_mc_info.imi_mca_handler = ia64_tpa(mca_hldlr_ptr->fp); - /* - * XXX - disable SAL checksum by setting size to 0; should be - * ia64_tpa(ia64_os_mca_dispatch_end) - ia64_tpa(ia64_os_mca_dispatch); - */ - ia64_mc_info.imi_mca_handler_size = 0; - - /* Register the os mca handler with SAL */ - if ((rc = ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, - ia64_mc_info.imi_mca_handler, - ia64_tpa(mca_hldlr_ptr->gp), - ia64_mc_info.imi_mca_handler_size, - 0, 0, 0))) - { - printk(KERN_ERR "Failed to register OS MCA handler with SAL " - "(status %ld)\n", rc); - return; - } - - IA64_MCA_DEBUG("%s: registered OS MCA handler with SAL at 0x%lx, gp = 0x%lx\n", __func__, - ia64_mc_info.imi_mca_handler, ia64_tpa(mca_hldlr_ptr->gp)); - - /* - * XXX - disable SAL checksum by setting size to 0, should be - * size of the actual init handler in mca_asm.S. - */ - ia64_mc_info.imi_monarch_init_handler = ia64_tpa(init_hldlr_ptr_monarch->fp); - ia64_mc_info.imi_monarch_init_handler_size = 0; - ia64_mc_info.imi_slave_init_handler = ia64_tpa(init_hldlr_ptr_slave->fp); - ia64_mc_info.imi_slave_init_handler_size = 0; - - IA64_MCA_DEBUG("%s: OS INIT handler at %lx\n", __func__, - ia64_mc_info.imi_monarch_init_handler); - - /* Register the os init handler with SAL */ - if ((rc = ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, - ia64_mc_info.imi_monarch_init_handler, - ia64_tpa(ia64_getreg(_IA64_REG_GP)), - ia64_mc_info.imi_monarch_init_handler_size, - ia64_mc_info.imi_slave_init_handler, - ia64_tpa(ia64_getreg(_IA64_REG_GP)), - ia64_mc_info.imi_slave_init_handler_size))) - { - printk(KERN_ERR "Failed to register m/s INIT handlers with SAL " - "(status %ld)\n", rc); - return; - } - if (register_die_notifier(&default_init_monarch_nb)) { - printk(KERN_ERR "Failed to register default monarch INIT process\n"); - return; - } - - IA64_MCA_DEBUG("%s: registered OS INIT handler with SAL\n", __func__); - - /* Initialize the areas set aside by the OS to buffer the - * platform/processor error states for MCA/INIT/CMC - * handling. - */ - ia64_log_init(SAL_INFO_TYPE_MCA); - ia64_log_init(SAL_INFO_TYPE_INIT); - ia64_log_init(SAL_INFO_TYPE_CMC); - ia64_log_init(SAL_INFO_TYPE_CPE); - - mca_init = 1; - printk(KERN_INFO "MCA related initialization done\n"); -} - - -/* - * These pieces cannot be done in ia64_mca_init() because it is called before - * early_irq_init() which would wipe out our percpu irq registrations. But we - * cannot leave them until ia64_mca_late_init() because by then all the other - * processors have been brought online and have set their own CMC vectors to - * point at a non-existant action. Called from arch_early_irq_init(). - */ -void __init ia64_mca_irq_init(void) -{ - /* - * Configure the CMCI/P vector and handler. Interrupts for CMC are - * per-processor, so AP CMC interrupts are setup in smp_callin() (smpboot.c). - */ - register_percpu_irq(IA64_CMC_VECTOR, ia64_mca_cmc_int_handler, 0, - "cmc_hndlr"); - register_percpu_irq(IA64_CMCP_VECTOR, ia64_mca_cmc_int_caller, 0, - "cmc_poll"); - ia64_mca_cmc_vector_setup(); /* Setup vector on BSP */ - - /* Setup the MCA rendezvous interrupt vector */ - register_percpu_irq(IA64_MCA_RENDEZ_VECTOR, ia64_mca_rendez_int_handler, - 0, "mca_rdzv"); - - /* Setup the MCA wakeup interrupt vector */ - register_percpu_irq(IA64_MCA_WAKEUP_VECTOR, ia64_mca_wakeup_int_handler, - 0, "mca_wkup"); - - /* Setup the CPEI/P handler */ - register_percpu_irq(IA64_CPEP_VECTOR, ia64_mca_cpe_int_caller, 0, - "cpe_poll"); -} - -/* - * ia64_mca_late_init - * - * Opportunity to setup things that require initialization later - * than ia64_mca_init. Setup a timer to poll for CPEs if the - * platform doesn't support an interrupt driven mechanism. - * - * Inputs : None - * Outputs : Status - */ -static int __init -ia64_mca_late_init(void) -{ - if (!mca_init) - return 0; - - /* Setup the CMCI/P vector and handler */ - timer_setup(&cmc_poll_timer, ia64_mca_cmc_poll, 0); - - /* Unmask/enable the vector */ - cmc_polling_enabled = 0; - cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "ia64/mca:online", - ia64_mca_cpu_online, NULL); - IA64_MCA_DEBUG("%s: CMCI/P setup and enabled.\n", __func__); - - /* Setup the CPEI/P vector and handler */ - cpe_vector = acpi_request_vector(ACPI_INTERRUPT_CPEI); - timer_setup(&cpe_poll_timer, ia64_mca_cpe_poll, 0); - - { - unsigned int irq; - - if (cpe_vector >= 0) { - /* If platform supports CPEI, enable the irq. */ - irq = local_vector_to_irq(cpe_vector); - if (irq > 0) { - cpe_poll_enabled = 0; - irq_set_status_flags(irq, IRQ_PER_CPU); - if (request_irq(irq, ia64_mca_cpe_int_handler, - 0, "cpe_hndlr", NULL)) - pr_err("Failed to register cpe_hndlr interrupt\n"); - ia64_cpe_irq = irq; - ia64_mca_register_cpev(cpe_vector); - IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n", - __func__); - return 0; - } - printk(KERN_ERR "%s: Failed to find irq for CPE " - "interrupt handler, vector %d\n", - __func__, cpe_vector); - } - /* If platform doesn't support CPEI, get the timer going. */ - if (cpe_poll_enabled) { - ia64_mca_cpe_poll(0UL); - IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __func__); - } - } - - return 0; -} - -device_initcall(ia64_mca_late_init); |