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[PATCH] MCA/INIT: use per cpu stacks

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The bulk of the change.  Use per cpu MCA/INIT stacks.  Change the SAL
to OS state (sos) to be per process.  Do all the assembler work on the
MCA/INIT stacks, leaving the original stack alone.  Pass per cpu state
data to the C handlers for MCA and INIT, which also means changing the
mca_drv interfaces slightly.  Lots of verification on whether the
original stack is usable before converting it to a sleeping process.

Signed-off-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Keith Owens
2005-09-11 17:22:53 +10:00
committed by Tony Luck
parent 289d773ee8
commit 7f613c7d22
6 changed files with 1404 additions and 1161 deletions
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37
arch/ia64/kernel/mca_drv.c
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@@ -4,6 +4,8 @@
*
* 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>
*/
#include <linux/config.h>
#include <linux/types.h>
@@ -38,10 +40,6 @@
/* max size of SAL error record (default) */
static int sal_rec_max = 10000;
/* from mca.c */
static ia64_mca_sal_to_os_state_t *sal_to_os_handoff_state;
static ia64_mca_os_to_sal_state_t *os_to_sal_handoff_state;
/* from mca_drv_asm.S */
extern void *mca_handler_bhhook(void);
@@ -316,7 +314,8 @@ init_record_index_pools(void)
*/
static mca_type_t
is_mca_global(peidx_table_t *peidx, pal_bus_check_info_t *pbci)
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);
@@ -327,7 +326,7 @@ is_mca_global(peidx_table_t *peidx, pal_bus_check_info_t *pbci)
* Therefore it is local MCA when rendezvous has not been requested.
* Failed to rendezvous, the system must be down.
*/
switch (sal_to_os_handoff_state->imsto_rendez_state) {
switch (sos->rv_rc) {
case -1: /* SAL rendezvous unsuccessful */
return MCA_IS_GLOBAL;
case 0: /* SAL rendezvous not required */
@@ -388,7 +387,8 @@ is_mca_global(peidx_table_t *peidx, pal_bus_check_info_t *pbci)
*/
static int
recover_from_read_error(slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_check_info_t *pbci)
recover_from_read_error(slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_check_info_t *pbci,
struct ia64_sal_os_state *sos)
{
sal_log_mod_error_info_t *smei;
pal_min_state_area_t *pmsa;
@@ -426,7 +426,7 @@ recover_from_read_error(slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_chec
* setup for resume to bottom half of MCA,
* "mca_handler_bhhook"
*/
pmsa = (pal_min_state_area_t *)(sal_to_os_handoff_state->pal_min_state | (6ul<<61));
pmsa = sos->pal_min_state;
/* pass to bhhook as 1st argument (gr8) */
pmsa->pmsa_gr[8-1] = smei->target_identifier;
/* set interrupted return address (but no use) */
@@ -459,7 +459,8 @@ recover_from_read_error(slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_chec
*/
static int
recover_from_platform_error(slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_check_info_t *pbci)
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);
@@ -469,7 +470,7 @@ recover_from_platform_error(slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_
case 1: /* partial read */
case 3: /* full line(cpu) read */
case 9: /* I/O space read */
status = recover_from_read_error(slidx, peidx, pbci);
status = recover_from_read_error(slidx, peidx, pbci, sos);
break;
case 0: /* unknown */
case 2: /* partial write */
@@ -508,7 +509,8 @@ recover_from_platform_error(slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_
*/
static int
recover_from_processor_error(int platform, slidx_table_t *slidx, peidx_table_t *peidx, pal_bus_check_info_t *pbci)
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);
@@ -545,7 +547,7 @@ recover_from_processor_error(int platform, slidx_table_t *slidx, peidx_table_t *
* This means "there are some platform errors".
*/
if (platform)
return recover_from_platform_error(slidx, peidx, pbci);
return recover_from_platform_error(slidx, peidx, pbci, sos);
/*
* On account of strange SAL error record, we cannot recover.
*/
@@ -562,8 +564,7 @@ recover_from_processor_error(int platform, slidx_table_t *slidx, peidx_table_t *
static int
mca_try_to_recover(void *rec,
ia64_mca_sal_to_os_state_t *sal_to_os_state,
ia64_mca_os_to_sal_state_t *os_to_sal_state)
struct ia64_sal_os_state *sos)
{
int platform_err;
int n_proc_err;
@@ -571,10 +572,6 @@ mca_try_to_recover(void *rec,
peidx_table_t peidx;
pal_bus_check_info_t pbci;
/* handoff state from/to mca.c */
sal_to_os_handoff_state = sal_to_os_state;
os_to_sal_handoff_state = os_to_sal_state;
/* Make index of SAL error record */
platform_err = mca_make_slidx(rec, &slidx);
@@ -597,11 +594,11 @@ mca_try_to_recover(void *rec,
*((u64*)&pbci) = peidx_check_info(&peidx, bus_check, 0);
/* Check whether MCA is global or not */
if (is_mca_global(&peidx, &pbci))
if (is_mca_global(&peidx, &pbci, sos))
return 0;
/* Try to recover a processor error */
return recover_from_processor_error(platform_err, &slidx, &peidx, &pbci);
return recover_from_processor_error(platform_err, &slidx, &peidx, &pbci, sos);
}
/*