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Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

Browse source 
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] ap: Setup timer for sending messages after reset.
  [S390] cio: fix chsc_chp_vary
  [S390] cio: provide fake irb for transport mode IO
  [S390] cio: disallow driver io for known to be broken paths
  [S390] hibernate: directly trigger subchannel evaluation
  [S390] remove reset of system call restart on psw changes
  [S390] add missing .set function for NT_S390_LAST_BREAK regset
  [S390] fix page change underindication in pgste_update_all
  [S390] ptrace inferior call interactions with TIF_SYSCALL
  [S390] kdump: Replace is_kdump_kernel() with OLDMEM_BASE check
This commit is contained in:
Linus Torvalds 2011-12-05 15:35:16 -08:00
commit 35337c8341
12 changed files with 137 additions and 88 deletions
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8
arch/s390/include/asm/pgtable.h
View file

@ -599,10 +599,10 @@ static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste)
skey = page_get_storage_key(address);
bits = skey & (_PAGE_CHANGED | _PAGE_REFERENCED);
/* Clear page changed & referenced bit in the storage key */
if (bits) {
skey ^= bits;
page_set_storage_key(address, skey, 1);
}
if (bits & _PAGE_CHANGED)
page_set_storage_key(address, skey ^ bits, 1);
else if (bits)
page_reset_referenced(address);
/* Transfer page changed & referenced bit to guest bits in pgste */
pgste_val(pgste) |= bits << 48; /* RCP_GR_BIT & RCP_GC_BIT */
/* Get host changed & referenced bits from pgste */

30
arch/s390/kernel/ptrace.c
View file

@ -296,13 +296,6 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
((data & PSW_MASK_EA) && !(data & PSW_MASK_BA))))
/* Invalid psw mask. */
return -EINVAL;
if (addr == (addr_t) &dummy->regs.psw.addr)
/*
* The debugger changed the instruction address,
* reset system call restart, see signal.c:do_signal
*/
task_thread_info(child)->system_call = 0;
*(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr) = data;
} else if (addr < (addr_t) (&dummy->regs.orig_gpr2)) {
@ -614,11 +607,6 @@ static int __poke_user_compat(struct task_struct *child,
/* Transfer 31 bit amode bit to psw mask. */
regs->psw.mask = (regs->psw.mask & ~PSW_MASK_BA) |
(__u64)(tmp & PSW32_ADDR_AMODE);
/*
* The debugger changed the instruction address,
* reset system call restart, see signal.c:do_signal
*/
task_thread_info(child)->system_call = 0;
} else {
/* gpr 0-15 */
*(__u32*)((addr_t) &regs->psw + addr*2 + 4) = tmp;
@ -905,6 +893,14 @@ static int s390_last_break_get(struct task_struct *target,
return 0;
}
static int s390_last_break_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
return 0;
}
#endif
static int s390_system_call_get(struct task_struct *target,
@ -951,6 +947,7 @@ static const struct user_regset s390_regsets[] = {
.size = sizeof(long),
.align = sizeof(long),
.get = s390_last_break_get,
.set = s390_last_break_set,
},
#endif
[REGSET_SYSTEM_CALL] = {
@ -1116,6 +1113,14 @@ static int s390_compat_last_break_get(struct task_struct *target,
return 0;
}
static int s390_compat_last_break_set(struct task_struct *target,
const struct user_regset *regset,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
return 0;
}
static const struct user_regset s390_compat_regsets[] = {
[REGSET_GENERAL] = {
.core_note_type = NT_PRSTATUS,
@ -1139,6 +1144,7 @@ static const struct user_regset s390_compat_regsets[] = {
.size = sizeof(long),
.align = sizeof(long),
.get = s390_compat_last_break_get,
.set = s390_compat_last_break_set,
},
[REGSET_SYSTEM_CALL] = {
.core_note_type = NT_S390_SYSTEM_CALL,

2
arch/s390/kernel/setup.c
View file

@ -579,7 +579,7 @@ static unsigned long __init find_crash_base(unsigned long crash_size,
*msg = "first memory chunk must be at least crashkernel size";
return 0;
}
if (is_kdump_kernel() && (crash_size == OLDMEM_SIZE))
if (OLDMEM_BASE && crash_size == OLDMEM_SIZE)
return OLDMEM_BASE;
for (i = MEMORY_CHUNKS - 1; i >= 0; i--) {

8
arch/s390/kernel/signal.c
View file

@ -460,9 +460,9 @@ void do_signal(struct pt_regs *regs)
regs->svc_code >> 16);
break;
}
/* No longer in a system call */
clear_thread_flag(TIF_SYSCALL);
}
/* No longer in a system call */
clear_thread_flag(TIF_SYSCALL);
if ((is_compat_task() ?
handle_signal32(signr, &ka, &info, oldset, regs) :
@ -486,6 +486,7 @@ void do_signal(struct pt_regs *regs)
}
/* No handlers present - check for system call restart */
clear_thread_flag(TIF_SYSCALL);
if (current_thread_info()->system_call) {
regs->svc_code = current_thread_info()->system_call;
switch (regs->gprs[2]) {
@ -500,9 +501,6 @@ void do_signal(struct pt_regs *regs)
regs->gprs[2] = regs->orig_gpr2;
set_thread_flag(TIF_SYSCALL);
break;
default:
clear_thread_flag(TIF_SYSCALL);
break;
}
}

7
drivers/s390/cio/chsc.c
View file

@ -529,10 +529,7 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
int chsc_chp_vary(struct chp_id chpid, int on)
{
struct channel_path *chp = chpid_to_chp(chpid);
struct chp_link link;
memset(&link, 0, sizeof(struct chp_link));
link.chpid = chpid;
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
/*
@ -542,10 +539,10 @@ int chsc_chp_vary(struct chp_id chpid, int on)
/* Try to update the channel path descritor. */
chsc_determine_base_channel_path_desc(chpid, &chp->desc);
for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
__s390_vary_chpid_on, &link);
__s390_vary_chpid_on, &chpid);
} else
for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
NULL, &link);
NULL, &chpid);
return 0;
}

5
drivers/s390/cio/cio.h
View file

@ -68,8 +68,13 @@ struct schib {
__u8 mda[4]; /* model dependent area */
} __attribute__ ((packed,aligned(4)));
/*
* When rescheduled, todo's with higher values will overwrite those
* with lower values.
*/
enum sch_todo {
SCH_TODO_NOTHING,
SCH_TODO_EVAL,
SCH_TODO_UNREG,
};

104
drivers/s390/cio/css.c
View file

@ -195,51 +195,6 @@ void css_sch_device_unregister(struct subchannel *sch)
}
EXPORT_SYMBOL_GPL(css_sch_device_unregister);
static void css_sch_todo(struct work_struct *work)
{
struct subchannel *sch;
enum sch_todo todo;
sch = container_of(work, struct subchannel, todo_work);
/* Find out todo. */
spin_lock_irq(sch->lock);
todo = sch->todo;
CIO_MSG_EVENT(4, "sch_todo: sch=0.%x.%04x, todo=%d\n", sch->schid.ssid,
sch->schid.sch_no, todo);
sch->todo = SCH_TODO_NOTHING;
spin_unlock_irq(sch->lock);
/* Perform todo. */
if (todo == SCH_TODO_UNREG)
css_sch_device_unregister(sch);
/* Release workqueue ref. */
put_device(&sch->dev);
}
/**
* css_sched_sch_todo - schedule a subchannel operation
* @sch: subchannel
* @todo: todo
*
* Schedule the operation identified by @todo to be performed on the slow path
* workqueue. Do nothing if another operation with higher priority is already
* scheduled. Needs to be called with subchannel lock held.
*/
void css_sched_sch_todo(struct subchannel *sch, enum sch_todo todo)
{
CIO_MSG_EVENT(4, "sch_todo: sched sch=0.%x.%04x todo=%d\n",
sch->schid.ssid, sch->schid.sch_no, todo);
if (sch->todo >= todo)
return;
/* Get workqueue ref. */
if (!get_device(&sch->dev))
return;
sch->todo = todo;
if (!queue_work(cio_work_q, &sch->todo_work)) {
/* Already queued, release workqueue ref. */
put_device(&sch->dev);
}
}
static void ssd_from_pmcw(struct chsc_ssd_info *ssd, struct pmcw *pmcw)
{
int i;
@ -466,6 +421,65 @@ static void css_evaluate_subchannel(struct subchannel_id schid, int slow)
css_schedule_eval(schid);
}
/**
* css_sched_sch_todo - schedule a subchannel operation
* @sch: subchannel
* @todo: todo
*
* Schedule the operation identified by @todo to be performed on the slow path
* workqueue. Do nothing if another operation with higher priority is already
* scheduled. Needs to be called with subchannel lock held.
*/
void css_sched_sch_todo(struct subchannel *sch, enum sch_todo todo)
{
CIO_MSG_EVENT(4, "sch_todo: sched sch=0.%x.%04x todo=%d\n",
sch->schid.ssid, sch->schid.sch_no, todo);
if (sch->todo >= todo)
return;
/* Get workqueue ref. */
if (!get_device(&sch->dev))
return;
sch->todo = todo;
if (!queue_work(cio_work_q, &sch->todo_work)) {
/* Already queued, release workqueue ref. */
put_device(&sch->dev);
}
}
static void css_sch_todo(struct work_struct *work)
{
struct subchannel *sch;
enum sch_todo todo;
int ret;
sch = container_of(work, struct subchannel, todo_work);
/* Find out todo. */
spin_lock_irq(sch->lock);
todo = sch->todo;
CIO_MSG_EVENT(4, "sch_todo: sch=0.%x.%04x, todo=%d\n", sch->schid.ssid,
sch->schid.sch_no, todo);
sch->todo = SCH_TODO_NOTHING;
spin_unlock_irq(sch->lock);
/* Perform todo. */
switch (todo) {
case SCH_TODO_NOTHING:
break;
case SCH_TODO_EVAL:
ret = css_evaluate_known_subchannel(sch, 1);
if (ret == -EAGAIN) {
spin_lock_irq(sch->lock);
css_sched_sch_todo(sch, todo);
spin_unlock_irq(sch->lock);
}
break;
case SCH_TODO_UNREG:
css_sch_device_unregister(sch);
break;
}
/* Release workqueue ref. */
put_device(&sch->dev);
}
static struct idset *slow_subchannel_set;
static spinlock_t slow_subchannel_lock;
static wait_queue_head_t css_eval_wq;

4
drivers/s390/cio/device.c
View file

@ -1868,9 +1868,9 @@ static void __ccw_device_pm_restore(struct ccw_device *cdev)
*/
cdev->private->flags.resuming = 1;
cdev->private->path_new_mask = LPM_ANYPATH;
css_schedule_eval(sch->schid);
css_sched_sch_todo(sch, SCH_TODO_EVAL);
spin_unlock_irq(sch->lock);
css_complete_work();
css_wait_for_slow_path();
/* cdev may have been moved to a different subchannel. */
sch = to_subchannel(cdev->dev.parent);

30
drivers/s390/cio/device_fsm.c
View file

@ -496,8 +496,26 @@ static void ccw_device_reset_path_events(struct ccw_device *cdev)
cdev->private->pgid_reset_mask = 0;
}
void
ccw_device_verify_done(struct ccw_device *cdev, int err)
static void create_fake_irb(struct irb *irb, int type)
{
memset(irb, 0, sizeof(*irb));
if (type == FAKE_CMD_IRB) {
struct cmd_scsw *scsw = &irb->scsw.cmd;
scsw->cc = 1;
scsw->fctl = SCSW_FCTL_START_FUNC;
scsw->actl = SCSW_ACTL_START_PEND;
scsw->stctl = SCSW_STCTL_STATUS_PEND;
} else if (type == FAKE_TM_IRB) {
struct tm_scsw *scsw = &irb->scsw.tm;
scsw->x = 1;
scsw->cc = 1;
scsw->fctl = SCSW_FCTL_START_FUNC;
scsw->actl = SCSW_ACTL_START_PEND;
scsw->stctl = SCSW_STCTL_STATUS_PEND;
}
}
void ccw_device_verify_done(struct ccw_device *cdev, int err)
{
struct subchannel *sch;
@ -520,12 +538,8 @@ ccw_device_verify_done(struct ccw_device *cdev, int err)
ccw_device_done(cdev, DEV_STATE_ONLINE);
/* Deliver fake irb to device driver, if needed. */
if (cdev->private->flags.fake_irb) {
memset(&cdev->private->irb, 0, sizeof(struct irb));
cdev->private->irb.scsw.cmd.cc = 1;
cdev->private->irb.scsw.cmd.fctl = SCSW_FCTL_START_FUNC;
cdev->private->irb.scsw.cmd.actl = SCSW_ACTL_START_PEND;
cdev->private->irb.scsw.cmd.stctl =
SCSW_STCTL_STATUS_PEND;
create_fake_irb(&cdev->private->irb,
cdev->private->flags.fake_irb);
cdev->private->flags.fake_irb = 0;
if (cdev->handler)
cdev->handler(cdev, cdev->private->intparm,

20
drivers/s390/cio/device_ops.c
View file

@ -198,7 +198,7 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
if (cdev->private->state == DEV_STATE_VERIFY) {
/* Remember to fake irb when finished. */
if (!cdev->private->flags.fake_irb) {
cdev->private->flags.fake_irb = 1;
cdev->private->flags.fake_irb = FAKE_CMD_IRB;
cdev->private->intparm = intparm;
return 0;
} else
@ -213,9 +213,9 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
ret = cio_set_options (sch, flags);
if (ret)
return ret;
/* Adjust requested path mask to excluded varied off paths. */
/* Adjust requested path mask to exclude unusable paths. */
if (lpm) {
lpm &= sch->opm;
lpm &= sch->lpm;
if (lpm == 0)
return -EACCES;
}
@ -605,11 +605,21 @@ int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw,
sch = to_subchannel(cdev->dev.parent);
if (!sch->schib.pmcw.ena)
return -EINVAL;
if (cdev->private->state == DEV_STATE_VERIFY) {
/* Remember to fake irb when finished. */
if (!cdev->private->flags.fake_irb) {
cdev->private->flags.fake_irb = FAKE_TM_IRB;
cdev->private->intparm = intparm;
return 0;
} else
/* There's already a fake I/O around. */
return -EBUSY;
}
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
/* Adjust requested path mask to excluded varied off paths. */
/* Adjust requested path mask to exclude unusable paths. */
if (lpm) {
lpm &= sch->opm;
lpm &= sch->lpm;
if (lpm == 0)
return -EACCES;
}

5
drivers/s390/cio/io_sch.h
View file

@ -111,6 +111,9 @@ enum cdev_todo {
CDEV_TODO_UNREG_EVAL,
};
#define FAKE_CMD_IRB 1
#define FAKE_TM_IRB 2
struct ccw_device_private {
struct ccw_device *cdev;
struct subchannel *sch;
@ -138,7 +141,7 @@ struct ccw_device_private {
unsigned int doverify:1; /* delayed path verification */
unsigned int donotify:1; /* call notify function */
unsigned int recog_done:1; /* dev. recog. complete */
unsigned int fake_irb:1; /* deliver faked irb */
unsigned int fake_irb:2; /* deliver faked irb */
unsigned int resuming:1; /* recognition while resume */
unsigned int pgroup:1; /* pathgroup is set up */
unsigned int mpath:1; /* multipathing is set up */

2
drivers/s390/crypto/ap_bus.c
View file

@ -1552,6 +1552,8 @@ static void ap_reset(struct ap_device *ap_dev)
rc = ap_init_queue(ap_dev->qid);
if (rc == -ENODEV)
ap_dev->unregistered = 1;
else
__ap_schedule_poll_timer();
}
static int __ap_poll_device(struct ap_device *ap_dev, unsigned long *flags)