+++ /dev/null
-// 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);
projects / linux-2.6-block.git / blobdiff