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 Failue
+ */
+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_table_t *peidx, pal_bus_check_info_t *pbci,
struct ia64_sal_os_state *sos)
{
- sal_log_mod_error_info_t *smei;
+ 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? */
- if (!pbci->tv)
+ target_identifier = get_target_identifier(peidx);
+ if (!target_identifier)
return fatal_mca("target address not valid");
/*
pmsa = sos->pal_min_state;
if (psr1->cpl != 0 ||
((psr2->cpl != 0) && mca_recover_range(pmsa->pmsa_iip))) {
- smei = peidx_bus_check(peidx, 0);
- if (smei->valid.target_identifier) {
- /*
- * setup for resume to bottom half of MCA,
- * "mca_handler_bhhook"
- */
- /* pass to bhhook as argument (gr8, ...) */
- pmsa->pmsa_gr[8-1] = smei->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. "
+ /*
+ * 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",
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
* Return value:
* 1 on Success / 0 on Failure
*/
-/*
- * Later we try to recover when below all conditions are satisfied.
- * 1. Only one processor error section is exist.
- * 2. BUS_CHECK is exist and the others are not exist.(Except TLB_CHECK)
- * 3. The entry of BUS_CHECK_INFO is 1.
- * 4. "External bus error" flag is set and the others are not set.
- */
static int
recover_from_processor_error(int platform, slidx_table_t *slidx,
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
- * 0 0 Weird record, not recovered
- * 1 0 Cache error, not recovered
- * 0 1 I/O error, attempt recovery
* 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->bc == 0 || pbci == NULL)
- return fatal_mca("No bus check");
+ if (psp->cc == 0 && (psp->bc == 0 || pbci == NULL))
+ return fatal_mca("No cache or bus check");
/*
- * Sorry, we cannot handle so many.
+ * Cannot handle more than one bus check.
*/
if (peidx_bus_check_num(peidx) > 1)
return fatal_mca("Too many bus checks");
- /*
- * Well, here is only one bus error.
- */
+
if (pbci->ib)
return fatal_mca("Internal Bus error");
- if (pbci->cc)
- return fatal_mca("Cache-cache error");
if (pbci->eb && pbci->bsi > 0)
return fatal_mca("External bus check fatal status");
/*
- * This is a local MCA and estimated as recoverble external bus error.
- * (e.g. a load from poisoned memory)
- * This means "there are some platform errors".
+ * This is a local MCA and estimated as a recoverble error.
*/
if (platform)
return recover_from_platform_error(slidx, peidx, pbci, sos);
+
/*
* On account of strange SAL error record, we cannot recover.
*/
projects / linux-2.6-omap-h63xx.git / blobdiff