mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
72fdbdce3d
Spelling and apostrophe fixes in arch/ia64/. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Tony Luck <tony.luck@intel.com>
795 lines
21 KiB
C
795 lines
21 KiB
C
/*
|
|
* File: mca_drv.c
|
|
* Purpose: Generic MCA handling layer
|
|
*
|
|
* Copyright (C) 2004 FUJITSU LIMITED
|
|
* Copyright (C) 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/bootmem.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 <asm/delay.h>
|
|
#include <asm/machvec.h>
|
|
#include <asm/page.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/system.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, 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 */
|
|
do_exit(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 < sizeof sal_log_sect_min_sizes/sizeof(size_t); 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 = (slidx_list_t *)
|
|
kmalloc(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;
|
|
pal_min_state_area_t *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");
|