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-rw-r--r--arch/ia64/kernel/mca_drv.c796
1 files changed, 0 insertions, 796 deletions
diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
deleted file mode 100644
index 23c203639a..0000000000
--- a/arch/ia64/kernel/mca_drv.c
+++ /dev/null
@@ -1,796 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * File: mca_drv.c
- * Purpose: Generic MCA handling layer
- *
- * Copyright (C) 2004 FUJITSU LIMITED
- * Copyright (C) 2004 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
- * Copyright (C) 2005 Silicon Graphics, Inc
- * Copyright (C) 2005 Keith Owens <kaos@sgi.com>
- * Copyright (C) 2006 Russ Anderson <rja@sgi.com>
- */
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kallsyms.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/mm.h>
-#include <linux/slab.h>
-
-#include <asm/delay.h>
-#include <asm/page.h>
-#include <asm/ptrace.h>
-#include <asm/sal.h>
-#include <asm/mca.h>
-
-#include <asm/irq.h>
-#include <asm/hw_irq.h>
-
-#include "mca_drv.h"
-
-/* max size of SAL error record (default) */
-static int sal_rec_max = 10000;
-
-/* from mca_drv_asm.S */
-extern void *mca_handler_bhhook(void);
-
-static DEFINE_SPINLOCK(mca_bh_lock);
-
-typedef enum {
- MCA_IS_LOCAL = 0,
- MCA_IS_GLOBAL = 1
-} mca_type_t;
-
-#define MAX_PAGE_ISOLATE 1024
-
-static struct page *page_isolate[MAX_PAGE_ISOLATE];
-static int num_page_isolate = 0;
-
-typedef enum {
- ISOLATE_NG,
- ISOLATE_OK,
- ISOLATE_NONE
-} isolate_status_t;
-
-typedef enum {
- MCA_NOT_RECOVERED = 0,
- MCA_RECOVERED = 1
-} recovery_status_t;
-
-/*
- * This pool keeps pointers to the section part of SAL error record
- */
-static struct {
- slidx_list_t *buffer; /* section pointer list pool */
- int cur_idx; /* Current index of section pointer list pool */
- int max_idx; /* Maximum index of section pointer list pool */
-} slidx_pool;
-
-static int
-fatal_mca(const char *fmt, ...)
-{
- va_list args;
- char buf[256];
-
- va_start(args, fmt);
- vsnprintf(buf, sizeof(buf), fmt, args);
- va_end(args);
- ia64_mca_printk(KERN_ALERT "MCA: %s\n", buf);
-
- return MCA_NOT_RECOVERED;
-}
-
-static int
-mca_recovered(const char *fmt, ...)
-{
- va_list args;
- char buf[256];
-
- va_start(args, fmt);
- vsnprintf(buf, sizeof(buf), fmt, args);
- va_end(args);
- ia64_mca_printk(KERN_INFO "MCA: %s\n", buf);
-
- return MCA_RECOVERED;
-}
-
-/**
- * mca_page_isolate - isolate a poisoned page in order not to use it later
- * @paddr: poisoned memory location
- *
- * Return value:
- * one of isolate_status_t, ISOLATE_OK/NG/NONE.
- */
-
-static isolate_status_t
-mca_page_isolate(unsigned long paddr)
-{
- int i;
- struct page *p;
-
- /* whether physical address is valid or not */
- if (!ia64_phys_addr_valid(paddr))
- return ISOLATE_NONE;
-
- if (!pfn_valid(paddr >> PAGE_SHIFT))
- return ISOLATE_NONE;
-
- /* convert physical address to physical page number */
- p = pfn_to_page(paddr>>PAGE_SHIFT);
-
- /* check whether a page number have been already registered or not */
- for (i = 0; i < num_page_isolate; i++)
- if (page_isolate[i] == p)
- return ISOLATE_OK; /* already listed */
-
- /* limitation check */
- if (num_page_isolate == MAX_PAGE_ISOLATE)
- return ISOLATE_NG;
-
- /* kick pages having attribute 'SLAB' or 'Reserved' */
- if (PageSlab(p) || PageReserved(p))
- return ISOLATE_NG;
-
- /* add attribute 'Reserved' and register the page */
- get_page(p);
- SetPageReserved(p);
- page_isolate[num_page_isolate++] = p;
-
- return ISOLATE_OK;
-}
-
-/**
- * mca_hanlder_bh - Kill the process which occurred memory read error
- * @paddr: poisoned address received from MCA Handler
- */
-
-void
-mca_handler_bh(unsigned long paddr, void *iip, unsigned long ipsr)
-{
- ia64_mlogbuf_dump();
- printk(KERN_ERR "OS_MCA: process [cpu %d, pid: %d, uid: %d, "
- "iip: %p, psr: 0x%lx,paddr: 0x%lx](%s) encounters MCA.\n",
- raw_smp_processor_id(), current->pid,
- from_kuid(&init_user_ns, current_uid()),
- iip, ipsr, paddr, current->comm);
-
- spin_lock(&mca_bh_lock);
- switch (mca_page_isolate(paddr)) {
- case ISOLATE_OK:
- printk(KERN_DEBUG "Page isolation: ( %lx ) success.\n", paddr);
- break;
- case ISOLATE_NG:
- printk(KERN_CRIT "Page isolation: ( %lx ) failure.\n", paddr);
- break;
- default:
- break;
- }
- spin_unlock(&mca_bh_lock);
-
- /* This process is about to be killed itself */
- make_task_dead(SIGKILL);
-}
-
-/**
- * mca_make_peidx - Make index of processor error section
- * @slpi: pointer to record of processor error section
- * @peidx: pointer to index of processor error section
- */
-
-static void
-mca_make_peidx(sal_log_processor_info_t *slpi, peidx_table_t *peidx)
-{
- /*
- * calculate the start address of
- * "struct cpuid_info" and "sal_processor_static_info_t".
- */
- u64 total_check_num = slpi->valid.num_cache_check
- + slpi->valid.num_tlb_check
- + slpi->valid.num_bus_check
- + slpi->valid.num_reg_file_check
- + slpi->valid.num_ms_check;
- u64 head_size = sizeof(sal_log_mod_error_info_t) * total_check_num
- + sizeof(sal_log_processor_info_t);
- u64 mid_size = slpi->valid.cpuid_info * sizeof(struct sal_cpuid_info);
-
- peidx_head(peidx) = slpi;
- peidx_mid(peidx) = (struct sal_cpuid_info *)
- (slpi->valid.cpuid_info ? ((char*)slpi + head_size) : NULL);
- peidx_bottom(peidx) = (sal_processor_static_info_t *)
- (slpi->valid.psi_static_struct ?
- ((char*)slpi + head_size + mid_size) : NULL);
-}
-
-/**
- * mca_make_slidx - Make index of SAL error record
- * @buffer: pointer to SAL error record
- * @slidx: pointer to index of SAL error record
- *
- * Return value:
- * 1 if record has platform error / 0 if not
- */
-#define LOG_INDEX_ADD_SECT_PTR(sect, ptr) \
- {slidx_list_t *hl = &slidx_pool.buffer[slidx_pool.cur_idx]; \
- hl->hdr = ptr; \
- list_add(&hl->list, &(sect)); \
- slidx_pool.cur_idx = (slidx_pool.cur_idx + 1)%slidx_pool.max_idx; }
-
-static int
-mca_make_slidx(void *buffer, slidx_table_t *slidx)
-{
- int platform_err = 0;
- int record_len = ((sal_log_record_header_t*)buffer)->len;
- u32 ercd_pos;
- int sects;
- sal_log_section_hdr_t *sp;
-
- /*
- * Initialize index referring current record
- */
- INIT_LIST_HEAD(&(slidx->proc_err));
- INIT_LIST_HEAD(&(slidx->mem_dev_err));
- INIT_LIST_HEAD(&(slidx->sel_dev_err));
- INIT_LIST_HEAD(&(slidx->pci_bus_err));
- INIT_LIST_HEAD(&(slidx->smbios_dev_err));
- INIT_LIST_HEAD(&(slidx->pci_comp_err));
- INIT_LIST_HEAD(&(slidx->plat_specific_err));
- INIT_LIST_HEAD(&(slidx->host_ctlr_err));
- INIT_LIST_HEAD(&(slidx->plat_bus_err));
- INIT_LIST_HEAD(&(slidx->unsupported));
-
- /*
- * Extract a Record Header
- */
- slidx->header = buffer;
-
- /*
- * Extract each section records
- * (arranged from "int ia64_log_platform_info_print()")
- */
- for (ercd_pos = sizeof(sal_log_record_header_t), sects = 0;
- ercd_pos < record_len; ercd_pos += sp->len, sects++) {
- sp = (sal_log_section_hdr_t *)((char*)buffer + ercd_pos);
- if (!efi_guidcmp(sp->guid, SAL_PROC_DEV_ERR_SECT_GUID)) {
- LOG_INDEX_ADD_SECT_PTR(slidx->proc_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_MEM_DEV_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->mem_dev_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_SEL_DEV_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->sel_dev_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_PCI_BUS_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->pci_bus_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_SMBIOS_DEV_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->smbios_dev_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_PCI_COMP_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->pci_comp_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_SPECIFIC_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->plat_specific_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_HOST_CTLR_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->host_ctlr_err, sp);
- } else if (!efi_guidcmp(sp->guid,
- SAL_PLAT_BUS_ERR_SECT_GUID)) {
- platform_err = 1;
- LOG_INDEX_ADD_SECT_PTR(slidx->plat_bus_err, sp);
- } else {
- LOG_INDEX_ADD_SECT_PTR(slidx->unsupported, sp);
- }
- }
- slidx->n_sections = sects;
-
- return platform_err;
-}
-
-/**
- * init_record_index_pools - Initialize pool of lists for SAL record index
- *
- * Return value:
- * 0 on Success / -ENOMEM on Failure
- */
-static int
-init_record_index_pools(void)
-{
- int i;
- int rec_max_size; /* Maximum size of SAL error records */
- int sect_min_size; /* Minimum size of SAL error sections */
- /* minimum size table of each section */
- static int sal_log_sect_min_sizes[] = {
- sizeof(sal_log_processor_info_t)
- + sizeof(sal_processor_static_info_t),
- sizeof(sal_log_mem_dev_err_info_t),
- sizeof(sal_log_sel_dev_err_info_t),
- sizeof(sal_log_pci_bus_err_info_t),
- sizeof(sal_log_smbios_dev_err_info_t),
- sizeof(sal_log_pci_comp_err_info_t),
- sizeof(sal_log_plat_specific_err_info_t),
- sizeof(sal_log_host_ctlr_err_info_t),
- sizeof(sal_log_plat_bus_err_info_t),
- };
-
- /*
- * MCA handler cannot allocate new memory on flight,
- * so we preallocate enough memory to handle a SAL record.
- *
- * Initialize a handling set of slidx_pool:
- * 1. Pick up the max size of SAL error records
- * 2. Pick up the min size of SAL error sections
- * 3. Allocate the pool as enough to 2 SAL records
- * (now we can estimate the maxinum of section in a record.)
- */
-
- /* - 1 - */
- rec_max_size = sal_rec_max;
-
- /* - 2 - */
- sect_min_size = sal_log_sect_min_sizes[0];
- for (i = 1; i < ARRAY_SIZE(sal_log_sect_min_sizes); i++)
- if (sect_min_size > sal_log_sect_min_sizes[i])
- sect_min_size = sal_log_sect_min_sizes[i];
-
- /* - 3 - */
- slidx_pool.max_idx = (rec_max_size/sect_min_size) * 2 + 1;
- slidx_pool.buffer =
- kmalloc_array(slidx_pool.max_idx, sizeof(slidx_list_t),
- GFP_KERNEL);
-
- return slidx_pool.buffer ? 0 : -ENOMEM;
-}
-
-
-/*****************************************************************************
- * Recovery functions *
- *****************************************************************************/
-
-/**
- * is_mca_global - Check whether this MCA is global or not
- * @peidx: pointer of index of processor error section
- * @pbci: pointer to pal_bus_check_info_t
- * @sos: pointer to hand off struct between SAL and OS
- *
- * Return value:
- * MCA_IS_LOCAL / MCA_IS_GLOBAL
- */
-
-static mca_type_t
-is_mca_global(peidx_table_t *peidx, pal_bus_check_info_t *pbci,
- struct ia64_sal_os_state *sos)
-{
- pal_processor_state_info_t *psp =
- (pal_processor_state_info_t*)peidx_psp(peidx);
-
- /*
- * PAL can request a rendezvous, if the MCA has a global scope.
- * If "rz_always" flag is set, SAL requests MCA rendezvous
- * in spite of global MCA.
- * Therefore it is local MCA when rendezvous has not been requested.
- * Failed to rendezvous, the system must be down.
- */
- switch (sos->rv_rc) {
- case -1: /* SAL rendezvous unsuccessful */
- return MCA_IS_GLOBAL;
- case 0: /* SAL rendezvous not required */
- return MCA_IS_LOCAL;
- case 1: /* SAL rendezvous successful int */
- case 2: /* SAL rendezvous successful int with init */
- default:
- break;
- }
-
- /*
- * If One or more Cache/TLB/Reg_File/Uarch_Check is here,
- * it would be a local MCA. (i.e. processor internal error)
- */
- if (psp->tc || psp->cc || psp->rc || psp->uc)
- return MCA_IS_LOCAL;
-
- /*
- * Bus_Check structure with Bus_Check.ib (internal bus error) flag set
- * would be a global MCA. (e.g. a system bus address parity error)
- */
- if (!pbci || pbci->ib)
- return MCA_IS_GLOBAL;
-
- /*
- * Bus_Check structure with Bus_Check.eb (external bus error) flag set
- * could be either a local MCA or a global MCA.
- *
- * Referring Bus_Check.bsi:
- * 0: Unknown/unclassified
- * 1: BERR#
- * 2: BINIT#
- * 3: Hard Fail
- * (FIXME: Are these SGI specific or generic bsi values?)
- */
- if (pbci->eb)
- switch (pbci->bsi) {
- case 0:
- /* e.g. a load from poisoned memory */
- return MCA_IS_LOCAL;
- case 1:
- case 2:
- case 3:
- return MCA_IS_GLOBAL;
- }
-
- return MCA_IS_GLOBAL;
-}
-
-/**
- * get_target_identifier - Get the valid Cache or Bus check target identifier.
- * @peidx: pointer of index of processor error section
- *
- * Return value:
- * target address on Success / 0 on Failure
- */
-static u64
-get_target_identifier(peidx_table_t *peidx)
-{
- u64 target_address = 0;
- sal_log_mod_error_info_t *smei;
- pal_cache_check_info_t *pcci;
- int i, level = 9;
-
- /*
- * Look through the cache checks for a valid target identifier
- * If more than one valid target identifier, return the one
- * with the lowest cache level.
- */
- for (i = 0; i < peidx_cache_check_num(peidx); i++) {
- smei = (sal_log_mod_error_info_t *)peidx_cache_check(peidx, i);
- if (smei->valid.target_identifier && smei->target_identifier) {
- pcci = (pal_cache_check_info_t *)&(smei->check_info);
- if (!target_address || (pcci->level < level)) {
- target_address = smei->target_identifier;
- level = pcci->level;
- continue;
- }
- }
- }
- if (target_address)
- return target_address;
-
- /*
- * Look at the bus check for a valid target identifier
- */
- smei = peidx_bus_check(peidx, 0);
- if (smei && smei->valid.target_identifier)
- return smei->target_identifier;
-
- return 0;
-}
-
-/**
- * recover_from_read_error - Try to recover the errors which type are "read"s.
- * @slidx: pointer of index of SAL error record
- * @peidx: pointer of index of processor error section
- * @pbci: pointer of pal_bus_check_info
- * @sos: pointer to hand off struct between SAL and OS
- *
- * Return value:
- * 1 on Success / 0 on Failure
- */
-
-static int
-recover_from_read_error(slidx_table_t *slidx,
- peidx_table_t *peidx, pal_bus_check_info_t *pbci,
- struct ia64_sal_os_state *sos)
-{
- u64 target_identifier;
- struct pal_min_state_area *pmsa;
- struct ia64_psr *psr1, *psr2;
- ia64_fptr_t *mca_hdlr_bh = (ia64_fptr_t*)mca_handler_bhhook;
-
- /* Is target address valid? */
- target_identifier = get_target_identifier(peidx);
- if (!target_identifier)
- return fatal_mca("target address not valid");
-
- /*
- * cpu read or memory-mapped io read
- *
- * offending process affected process OS MCA do
- * kernel mode kernel mode down system
- * kernel mode user mode kill the process
- * user mode kernel mode down system (*)
- * user mode user mode kill the process
- *
- * (*) You could terminate offending user-mode process
- * if (pbci->pv && pbci->pl != 0) *and* if you sure
- * the process not have any locks of kernel.
- */
-
- /* Is minstate valid? */
- if (!peidx_bottom(peidx) || !(peidx_bottom(peidx)->valid.minstate))
- return fatal_mca("minstate not valid");
- psr1 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_ipsr);
- psr2 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_xpsr);
-
- /*
- * Check the privilege level of interrupted context.
- * If it is user-mode, then terminate affected process.
- */
-
- pmsa = sos->pal_min_state;
- if (psr1->cpl != 0 ||
- ((psr2->cpl != 0) && mca_recover_range(pmsa->pmsa_iip))) {
- /*
- * setup for resume to bottom half of MCA,
- * "mca_handler_bhhook"
- */
- /* pass to bhhook as argument (gr8, ...) */
- pmsa->pmsa_gr[8-1] = target_identifier;
- pmsa->pmsa_gr[9-1] = pmsa->pmsa_iip;
- pmsa->pmsa_gr[10-1] = pmsa->pmsa_ipsr;
- /* set interrupted return address (but no use) */
- pmsa->pmsa_br0 = pmsa->pmsa_iip;
- /* change resume address to bottom half */
- pmsa->pmsa_iip = mca_hdlr_bh->fp;
- pmsa->pmsa_gr[1-1] = mca_hdlr_bh->gp;
- /* set cpl with kernel mode */
- psr2 = (struct ia64_psr *)&pmsa->pmsa_ipsr;
- psr2->cpl = 0;
- psr2->ri = 0;
- psr2->bn = 1;
- psr2->i = 0;
-
- return mca_recovered("user memory corruption. "
- "kill affected process - recovered.");
- }
-
- return fatal_mca("kernel context not recovered, iip 0x%lx\n",
- pmsa->pmsa_iip);
-}
-
-/**
- * recover_from_platform_error - Recover from platform error.
- * @slidx: pointer of index of SAL error record
- * @peidx: pointer of index of processor error section
- * @pbci: pointer of pal_bus_check_info
- * @sos: pointer to hand off struct between SAL and OS
- *
- * Return value:
- * 1 on Success / 0 on Failure
- */
-
-static int
-recover_from_platform_error(slidx_table_t *slidx, peidx_table_t *peidx,
- pal_bus_check_info_t *pbci,
- struct ia64_sal_os_state *sos)
-{
- int status = 0;
- pal_processor_state_info_t *psp =
- (pal_processor_state_info_t*)peidx_psp(peidx);
-
- if (psp->bc && pbci->eb && pbci->bsi == 0) {
- switch(pbci->type) {
- case 1: /* partial read */
- case 3: /* full line(cpu) read */
- case 9: /* I/O space read */
- status = recover_from_read_error(slidx, peidx, pbci,
- sos);
- break;
- case 0: /* unknown */
- case 2: /* partial write */
- case 4: /* full line write */
- case 5: /* implicit or explicit write-back operation */
- case 6: /* snoop probe */
- case 7: /* incoming or outgoing ptc.g */
- case 8: /* write coalescing transactions */
- case 10: /* I/O space write */
- case 11: /* inter-processor interrupt message(IPI) */
- case 12: /* interrupt acknowledge or
- external task priority cycle */
- default:
- break;
- }
- } else if (psp->cc && !psp->bc) { /* Cache error */
- status = recover_from_read_error(slidx, peidx, pbci, sos);
- }
-
- return status;
-}
-
-/*
- * recover_from_tlb_check
- * @peidx: pointer of index of processor error section
- *
- * Return value:
- * 1 on Success / 0 on Failure
- */
-static int
-recover_from_tlb_check(peidx_table_t *peidx)
-{
- sal_log_mod_error_info_t *smei;
- pal_tlb_check_info_t *ptci;
-
- smei = (sal_log_mod_error_info_t *)peidx_tlb_check(peidx, 0);
- ptci = (pal_tlb_check_info_t *)&(smei->check_info);
-
- /*
- * Look for signature of a duplicate TLB DTC entry, which is
- * a SW bug and always fatal.
- */
- if (ptci->op == PAL_TLB_CHECK_OP_PURGE
- && !(ptci->itr || ptci->dtc || ptci->itc))
- return fatal_mca("Duplicate TLB entry");
-
- return mca_recovered("TLB check recovered");
-}
-
-/**
- * recover_from_processor_error
- * @platform: whether there are some platform error section or not
- * @slidx: pointer of index of SAL error record
- * @peidx: pointer of index of processor error section
- * @pbci: pointer of pal_bus_check_info
- * @sos: pointer to hand off struct between SAL and OS
- *
- * Return value:
- * 1 on Success / 0 on Failure
- */
-
-static int
-recover_from_processor_error(int platform, slidx_table_t *slidx,
- peidx_table_t *peidx, pal_bus_check_info_t *pbci,
- struct ia64_sal_os_state *sos)
-{
- pal_processor_state_info_t *psp =
- (pal_processor_state_info_t*)peidx_psp(peidx);
-
- /*
- * Processor recovery status must key off of the PAL recovery
- * status in the Processor State Parameter.
- */
-
- /*
- * The machine check is corrected.
- */
- if (psp->cm == 1)
- return mca_recovered("machine check is already corrected.");
-
- /*
- * The error was not contained. Software must be reset.
- */
- if (psp->us || psp->ci == 0)
- return fatal_mca("error not contained");
-
- /*
- * Look for recoverable TLB check
- */
- if (psp->tc && !(psp->cc || psp->bc || psp->rc || psp->uc))
- return recover_from_tlb_check(peidx);
-
- /*
- * The cache check and bus check bits have four possible states
- * cc bc
- * 1 1 Memory error, attempt recovery
- * 1 0 Cache error, attempt recovery
- * 0 1 I/O error, attempt recovery
- * 0 0 Other error type, not recovered
- */
- if (psp->cc == 0 && (psp->bc == 0 || pbci == NULL))
- return fatal_mca("No cache or bus check");
-
- /*
- * Cannot handle more than one bus check.
- */
- if (peidx_bus_check_num(peidx) > 1)
- return fatal_mca("Too many bus checks");
-
- if (pbci->ib)
- return fatal_mca("Internal Bus error");
- if (pbci->eb && pbci->bsi > 0)
- return fatal_mca("External bus check fatal status");
-
- /*
- * This is a local MCA and estimated as a recoverable error.
- */
- if (platform)
- return recover_from_platform_error(slidx, peidx, pbci, sos);
-
- /*
- * On account of strange SAL error record, we cannot recover.
- */
- return fatal_mca("Strange SAL record");
-}
-
-/**
- * mca_try_to_recover - Try to recover from MCA
- * @rec: pointer to a SAL error record
- * @sos: pointer to hand off struct between SAL and OS
- *
- * Return value:
- * 1 on Success / 0 on Failure
- */
-
-static int
-mca_try_to_recover(void *rec, struct ia64_sal_os_state *sos)
-{
- int platform_err;
- int n_proc_err;
- slidx_table_t slidx;
- peidx_table_t peidx;
- pal_bus_check_info_t pbci;
-
- /* Make index of SAL error record */
- platform_err = mca_make_slidx(rec, &slidx);
-
- /* Count processor error sections */
- n_proc_err = slidx_count(&slidx, proc_err);
-
- /* Now, OS can recover when there is one processor error section */
- if (n_proc_err > 1)
- return fatal_mca("Too Many Errors");
- else if (n_proc_err == 0)
- /* Weird SAL record ... We can't do anything */
- return fatal_mca("Weird SAL record");
-
- /* Make index of processor error section */
- mca_make_peidx((sal_log_processor_info_t*)
- slidx_first_entry(&slidx.proc_err)->hdr, &peidx);
-
- /* Extract Processor BUS_CHECK[0] */
- *((u64*)&pbci) = peidx_check_info(&peidx, bus_check, 0);
-
- /* Check whether MCA is global or not */
- if (is_mca_global(&peidx, &pbci, sos))
- return fatal_mca("global MCA");
-
- /* Try to recover a processor error */
- return recover_from_processor_error(platform_err, &slidx, &peidx,
- &pbci, sos);
-}
-
-/*
- * =============================================================================
- */
-
-int __init mca_external_handler_init(void)
-{
- if (init_record_index_pools())
- return -ENOMEM;
-
- /* register external mca handlers */
- if (ia64_reg_MCA_extension(mca_try_to_recover)) {
- printk(KERN_ERR "ia64_reg_MCA_extension failed.\n");
- kfree(slidx_pool.buffer);
- return -EFAULT;
- }
- return 0;
-}
-
-void __exit mca_external_handler_exit(void)
-{
- /* unregister external mca handlers */
- ia64_unreg_MCA_extension();
- kfree(slidx_pool.buffer);
-}
-
-module_init(mca_external_handler_init);
-module_exit(mca_external_handler_exit);
-
-module_param(sal_rec_max, int, 0644);
-MODULE_PARM_DESC(sal_rec_max, "Max size of SAL error record");
-
-MODULE_DESCRIPTION("ia64 platform dependent mca handler driver");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 02:12:32 +0000