Commit 991657a3 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:
 "A couple of bug fixes, the most hairy on is the flush_tlb_kernel_range
  fix.  Another case of "how could this ever have worked?"."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/kdump: Do not add standby memory for kdump
  drivers/i2c: remove !S390 dependency, add missing GENERIC_HARDIRQS dependencies
  s390/scm: process availability
  s390/scm_blk: suspend writes
  s390/scm_drv: extend notify callback
  s390/scm_blk: fix request number accounting
  s390/mm: fix flush_tlb_kernel_range()
  s390/mm: fix vmemmap size calculation
  s390: critical section cleanup vs. machine checks
parents 1c6ba37b 52319b45
...@@ -34,6 +34,8 @@ struct arsb { ...@@ -34,6 +34,8 @@ struct arsb {
u32 reserved[4]; u32 reserved[4];
} __packed; } __packed;
#define EQC_WR_PROHIBIT 22
struct msb { struct msb {
u8 fmt:4; u8 fmt:4;
u8 oc:4; u8 oc:4;
...@@ -96,11 +98,13 @@ struct scm_device { ...@@ -96,11 +98,13 @@ struct scm_device {
#define OP_STATE_TEMP_ERR 2 #define OP_STATE_TEMP_ERR 2
#define OP_STATE_PERM_ERR 3 #define OP_STATE_PERM_ERR 3
enum scm_event {SCM_CHANGE, SCM_AVAIL};
struct scm_driver { struct scm_driver {
struct device_driver drv; struct device_driver drv;
int (*probe) (struct scm_device *scmdev); int (*probe) (struct scm_device *scmdev);
int (*remove) (struct scm_device *scmdev); int (*remove) (struct scm_device *scmdev);
void (*notify) (struct scm_device *scmdev); void (*notify) (struct scm_device *scmdev, enum scm_event event);
void (*handler) (struct scm_device *scmdev, void *data, int error); void (*handler) (struct scm_device *scmdev, void *data, int error);
}; };
......
...@@ -74,8 +74,6 @@ static inline void __tlb_flush_idte(unsigned long asce) ...@@ -74,8 +74,6 @@ static inline void __tlb_flush_idte(unsigned long asce)
static inline void __tlb_flush_mm(struct mm_struct * mm) static inline void __tlb_flush_mm(struct mm_struct * mm)
{ {
if (unlikely(cpumask_empty(mm_cpumask(mm))))
return;
/* /*
* If the machine has IDTE we prefer to do a per mm flush * If the machine has IDTE we prefer to do a per mm flush
* on all cpus instead of doing a local flush if the mm * on all cpus instead of doing a local flush if the mm
......
...@@ -636,7 +636,8 @@ ENTRY(mcck_int_handler) ...@@ -636,7 +636,8 @@ ENTRY(mcck_int_handler)
UPDATE_VTIME %r14,%r15,__LC_MCCK_ENTER_TIMER UPDATE_VTIME %r14,%r15,__LC_MCCK_ENTER_TIMER
mcck_skip: mcck_skip:
SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+32,__LC_PANIC_STACK,PAGE_SHIFT SWITCH_ASYNC __LC_GPREGS_SAVE_AREA+32,__LC_PANIC_STACK,PAGE_SHIFT
mvc __PT_R0(64,%r11),__LC_GPREGS_SAVE_AREA stm %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(32,%r11),__LC_GPREGS_SAVE_AREA+32
stm %r8,%r9,__PT_PSW(%r11) stm %r8,%r9,__PT_PSW(%r11)
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15)
l %r1,BASED(.Ldo_machine_check) l %r1,BASED(.Ldo_machine_check)
......
...@@ -678,8 +678,9 @@ ENTRY(mcck_int_handler) ...@@ -678,8 +678,9 @@ ENTRY(mcck_int_handler)
UPDATE_VTIME %r14,__LC_MCCK_ENTER_TIMER UPDATE_VTIME %r14,__LC_MCCK_ENTER_TIMER
LAST_BREAK %r14 LAST_BREAK %r14
mcck_skip: mcck_skip:
lghi %r14,__LC_GPREGS_SAVE_AREA lghi %r14,__LC_GPREGS_SAVE_AREA+64
mvc __PT_R0(128,%r11),0(%r14) stmg %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(64,%r11),0(%r14)
stmg %r8,%r9,__PT_PSW(%r11) stmg %r8,%r9,__PT_PSW(%r11)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs lgr %r2,%r11 # pass pointer to pt_regs
......
...@@ -571,6 +571,8 @@ static void __init setup_memory_end(void) ...@@ -571,6 +571,8 @@ static void __init setup_memory_end(void)
/* Split remaining virtual space between 1:1 mapping & vmemmap array */ /* Split remaining virtual space between 1:1 mapping & vmemmap array */
tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page)); tmp = VMALLOC_START / (PAGE_SIZE + sizeof(struct page));
/* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */
tmp = SECTION_ALIGN_UP(tmp);
tmp = VMALLOC_START - tmp * sizeof(struct page); tmp = VMALLOC_START - tmp * sizeof(struct page);
tmp &= ~((vmax >> 11) - 1); /* align to page table level */ tmp &= ~((vmax >> 11) - 1); /* align to page table level */
tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS); tmp = min(tmp, 1UL << MAX_PHYSMEM_BITS);
......
...@@ -4,7 +4,6 @@ ...@@ -4,7 +4,6 @@
menuconfig I2C menuconfig I2C
tristate "I2C support" tristate "I2C support"
depends on !S390
select RT_MUTEXES select RT_MUTEXES
---help--- ---help---
I2C (pronounce: I-squared-C) is a slow serial bus protocol used in I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
...@@ -76,6 +75,7 @@ config I2C_HELPER_AUTO ...@@ -76,6 +75,7 @@ config I2C_HELPER_AUTO
config I2C_SMBUS config I2C_SMBUS
tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO
depends on GENERIC_HARDIRQS
help help
Say Y here if you want support for SMBus extensions to the I2C Say Y here if you want support for SMBus extensions to the I2C
specification. At the moment, the only supported extension is specification. At the moment, the only supported extension is
......
...@@ -114,7 +114,7 @@ config I2C_I801 ...@@ -114,7 +114,7 @@ config I2C_I801
config I2C_ISCH config I2C_ISCH
tristate "Intel SCH SMBus 1.0" tristate "Intel SCH SMBus 1.0"
depends on PCI depends on PCI && GENERIC_HARDIRQS
select LPC_SCH select LPC_SCH
help help
Say Y here if you want to use SMBus controller on the Intel SCH Say Y here if you want to use SMBus controller on the Intel SCH
...@@ -543,6 +543,7 @@ config I2C_NUC900 ...@@ -543,6 +543,7 @@ config I2C_NUC900
config I2C_OCORES config I2C_OCORES
tristate "OpenCores I2C Controller" tristate "OpenCores I2C Controller"
depends on GENERIC_HARDIRQS
help help
If you say yes to this option, support will be included for the If you say yes to this option, support will be included for the
OpenCores I2C controller. For details see OpenCores I2C controller. For details see
...@@ -777,7 +778,7 @@ config I2C_DIOLAN_U2C ...@@ -777,7 +778,7 @@ config I2C_DIOLAN_U2C
config I2C_PARPORT config I2C_PARPORT
tristate "Parallel port adapter" tristate "Parallel port adapter"
depends on PARPORT depends on PARPORT && GENERIC_HARDIRQS
select I2C_ALGOBIT select I2C_ALGOBIT
select I2C_SMBUS select I2C_SMBUS
help help
...@@ -802,6 +803,7 @@ config I2C_PARPORT ...@@ -802,6 +803,7 @@ config I2C_PARPORT
config I2C_PARPORT_LIGHT config I2C_PARPORT_LIGHT
tristate "Parallel port adapter (light)" tristate "Parallel port adapter (light)"
depends on GENERIC_HARDIRQS
select I2C_ALGOBIT select I2C_ALGOBIT
select I2C_SMBUS select I2C_SMBUS
help help
......
...@@ -135,6 +135,11 @@ static const struct block_device_operations scm_blk_devops = { ...@@ -135,6 +135,11 @@ static const struct block_device_operations scm_blk_devops = {
.release = scm_release, .release = scm_release,
}; };
static bool scm_permit_request(struct scm_blk_dev *bdev, struct request *req)
{
return rq_data_dir(req) != WRITE || bdev->state != SCM_WR_PROHIBIT;
}
static void scm_request_prepare(struct scm_request *scmrq) static void scm_request_prepare(struct scm_request *scmrq)
{ {
struct scm_blk_dev *bdev = scmrq->bdev; struct scm_blk_dev *bdev = scmrq->bdev;
...@@ -195,14 +200,18 @@ void scm_request_requeue(struct scm_request *scmrq) ...@@ -195,14 +200,18 @@ void scm_request_requeue(struct scm_request *scmrq)
scm_release_cluster(scmrq); scm_release_cluster(scmrq);
blk_requeue_request(bdev->rq, scmrq->request); blk_requeue_request(bdev->rq, scmrq->request);
atomic_dec(&bdev->queued_reqs);
scm_request_done(scmrq); scm_request_done(scmrq);
scm_ensure_queue_restart(bdev); scm_ensure_queue_restart(bdev);
} }
void scm_request_finish(struct scm_request *scmrq) void scm_request_finish(struct scm_request *scmrq)
{ {
struct scm_blk_dev *bdev = scmrq->bdev;
scm_release_cluster(scmrq); scm_release_cluster(scmrq);
blk_end_request_all(scmrq->request, scmrq->error); blk_end_request_all(scmrq->request, scmrq->error);
atomic_dec(&bdev->queued_reqs);
scm_request_done(scmrq); scm_request_done(scmrq);
} }
...@@ -218,6 +227,10 @@ static void scm_blk_request(struct request_queue *rq) ...@@ -218,6 +227,10 @@ static void scm_blk_request(struct request_queue *rq)
if (req->cmd_type != REQ_TYPE_FS) if (req->cmd_type != REQ_TYPE_FS)
continue; continue;
if (!scm_permit_request(bdev, req)) {
scm_ensure_queue_restart(bdev);
return;
}
scmrq = scm_request_fetch(); scmrq = scm_request_fetch();
if (!scmrq) { if (!scmrq) {
SCM_LOG(5, "no request"); SCM_LOG(5, "no request");
...@@ -231,11 +244,13 @@ static void scm_blk_request(struct request_queue *rq) ...@@ -231,11 +244,13 @@ static void scm_blk_request(struct request_queue *rq)
return; return;
} }
if (scm_need_cluster_request(scmrq)) { if (scm_need_cluster_request(scmrq)) {
atomic_inc(&bdev->queued_reqs);
blk_start_request(req); blk_start_request(req);
scm_initiate_cluster_request(scmrq); scm_initiate_cluster_request(scmrq);
return; return;
} }
scm_request_prepare(scmrq); scm_request_prepare(scmrq);
atomic_inc(&bdev->queued_reqs);
blk_start_request(req); blk_start_request(req);
ret = scm_start_aob(scmrq->aob); ret = scm_start_aob(scmrq->aob);
...@@ -244,7 +259,6 @@ static void scm_blk_request(struct request_queue *rq) ...@@ -244,7 +259,6 @@ static void scm_blk_request(struct request_queue *rq)
scm_request_requeue(scmrq); scm_request_requeue(scmrq);
return; return;
} }
atomic_inc(&bdev->queued_reqs);
} }
} }
...@@ -280,6 +294,38 @@ void scm_blk_irq(struct scm_device *scmdev, void *data, int error) ...@@ -280,6 +294,38 @@ void scm_blk_irq(struct scm_device *scmdev, void *data, int error)
tasklet_hi_schedule(&bdev->tasklet); tasklet_hi_schedule(&bdev->tasklet);
} }
static void scm_blk_handle_error(struct scm_request *scmrq)
{
struct scm_blk_dev *bdev = scmrq->bdev;
unsigned long flags;
if (scmrq->error != -EIO)
goto restart;
/* For -EIO the response block is valid. */
switch (scmrq->aob->response.eqc) {
case EQC_WR_PROHIBIT:
spin_lock_irqsave(&bdev->lock, flags);
if (bdev->state != SCM_WR_PROHIBIT)
pr_info("%lu: Write access to the SCM increment is suspended\n",
(unsigned long) bdev->scmdev->address);
bdev->state = SCM_WR_PROHIBIT;
spin_unlock_irqrestore(&bdev->lock, flags);
goto requeue;
default:
break;
}
restart:
if (!scm_start_aob(scmrq->aob))
return;
requeue:
spin_lock_irqsave(&bdev->rq_lock, flags);
scm_request_requeue(scmrq);
spin_unlock_irqrestore(&bdev->rq_lock, flags);
}
static void scm_blk_tasklet(struct scm_blk_dev *bdev) static void scm_blk_tasklet(struct scm_blk_dev *bdev)
{ {
struct scm_request *scmrq; struct scm_request *scmrq;
...@@ -293,11 +339,8 @@ static void scm_blk_tasklet(struct scm_blk_dev *bdev) ...@@ -293,11 +339,8 @@ static void scm_blk_tasklet(struct scm_blk_dev *bdev)
spin_unlock_irqrestore(&bdev->lock, flags); spin_unlock_irqrestore(&bdev->lock, flags);
if (scmrq->error && scmrq->retries-- > 0) { if (scmrq->error && scmrq->retries-- > 0) {
if (scm_start_aob(scmrq->aob)) { scm_blk_handle_error(scmrq);
spin_lock_irqsave(&bdev->rq_lock, flags);
scm_request_requeue(scmrq);
spin_unlock_irqrestore(&bdev->rq_lock, flags);
}
/* Request restarted or requeued, handle next. */ /* Request restarted or requeued, handle next. */
spin_lock_irqsave(&bdev->lock, flags); spin_lock_irqsave(&bdev->lock, flags);
continue; continue;
...@@ -310,7 +353,6 @@ static void scm_blk_tasklet(struct scm_blk_dev *bdev) ...@@ -310,7 +353,6 @@ static void scm_blk_tasklet(struct scm_blk_dev *bdev)
} }
scm_request_finish(scmrq); scm_request_finish(scmrq);
atomic_dec(&bdev->queued_reqs);
spin_lock_irqsave(&bdev->lock, flags); spin_lock_irqsave(&bdev->lock, flags);
} }
spin_unlock_irqrestore(&bdev->lock, flags); spin_unlock_irqrestore(&bdev->lock, flags);
...@@ -332,6 +374,7 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev) ...@@ -332,6 +374,7 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev)
} }
bdev->scmdev = scmdev; bdev->scmdev = scmdev;
bdev->state = SCM_OPER;
spin_lock_init(&bdev->rq_lock); spin_lock_init(&bdev->rq_lock);
spin_lock_init(&bdev->lock); spin_lock_init(&bdev->lock);
INIT_LIST_HEAD(&bdev->finished_requests); INIT_LIST_HEAD(&bdev->finished_requests);
...@@ -396,6 +439,18 @@ void scm_blk_dev_cleanup(struct scm_blk_dev *bdev) ...@@ -396,6 +439,18 @@ void scm_blk_dev_cleanup(struct scm_blk_dev *bdev)
put_disk(bdev->gendisk); put_disk(bdev->gendisk);
} }
void scm_blk_set_available(struct scm_blk_dev *bdev)
{
unsigned long flags;
spin_lock_irqsave(&bdev->lock, flags);
if (bdev->state == SCM_WR_PROHIBIT)
pr_info("%lu: Write access to the SCM increment is restored\n",
(unsigned long) bdev->scmdev->address);
bdev->state = SCM_OPER;
spin_unlock_irqrestore(&bdev->lock, flags);
}
static int __init scm_blk_init(void) static int __init scm_blk_init(void)
{ {
int ret = -EINVAL; int ret = -EINVAL;
......
...@@ -21,6 +21,7 @@ struct scm_blk_dev { ...@@ -21,6 +21,7 @@ struct scm_blk_dev {
spinlock_t rq_lock; /* guard the request queue */ spinlock_t rq_lock; /* guard the request queue */
spinlock_t lock; /* guard the rest of the blockdev */ spinlock_t lock; /* guard the rest of the blockdev */
atomic_t queued_reqs; atomic_t queued_reqs;
enum {SCM_OPER, SCM_WR_PROHIBIT} state;
struct list_head finished_requests; struct list_head finished_requests;
#ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE
struct list_head cluster_list; struct list_head cluster_list;
...@@ -48,6 +49,7 @@ struct scm_request { ...@@ -48,6 +49,7 @@ struct scm_request {
int scm_blk_dev_setup(struct scm_blk_dev *, struct scm_device *); int scm_blk_dev_setup(struct scm_blk_dev *, struct scm_device *);
void scm_blk_dev_cleanup(struct scm_blk_dev *); void scm_blk_dev_cleanup(struct scm_blk_dev *);
void scm_blk_set_available(struct scm_blk_dev *);
void scm_blk_irq(struct scm_device *, void *, int); void scm_blk_irq(struct scm_device *, void *, int);
void scm_request_finish(struct scm_request *); void scm_request_finish(struct scm_request *);
......
...@@ -13,12 +13,23 @@ ...@@ -13,12 +13,23 @@
#include <asm/eadm.h> #include <asm/eadm.h>
#include "scm_blk.h" #include "scm_blk.h"
static void notify(struct scm_device *scmdev) static void scm_notify(struct scm_device *scmdev, enum scm_event event)
{ {
struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev);
switch (event) {
case SCM_CHANGE:
pr_info("%lu: The capabilities of the SCM increment changed\n", pr_info("%lu: The capabilities of the SCM increment changed\n",
(unsigned long) scmdev->address); (unsigned long) scmdev->address);
SCM_LOG(2, "State changed"); SCM_LOG(2, "State changed");
SCM_LOG_STATE(2, scmdev); SCM_LOG_STATE(2, scmdev);
break;
case SCM_AVAIL:
SCM_LOG(2, "Increment available");
SCM_LOG_STATE(2, scmdev);
scm_blk_set_available(bdev);
break;
}
} }
static int scm_probe(struct scm_device *scmdev) static int scm_probe(struct scm_device *scmdev)
...@@ -64,7 +75,7 @@ static struct scm_driver scm_drv = { ...@@ -64,7 +75,7 @@ static struct scm_driver scm_drv = {
.name = "scm_block", .name = "scm_block",
.owner = THIS_MODULE, .owner = THIS_MODULE,
}, },
.notify = notify, .notify = scm_notify,
.probe = scm_probe, .probe = scm_probe,
.remove = scm_remove, .remove = scm_remove,
.handler = scm_blk_irq, .handler = scm_blk_irq,
......
...@@ -627,6 +627,8 @@ static int __init sclp_detect_standby_memory(void) ...@@ -627,6 +627,8 @@ static int __init sclp_detect_standby_memory(void)
struct read_storage_sccb *sccb; struct read_storage_sccb *sccb;
int i, id, assigned, rc; int i, id, assigned, rc;
if (OLDMEM_BASE) /* No standby memory in kdump mode */
return 0;
if (!early_read_info_sccb_valid) if (!early_read_info_sccb_valid)
return 0; return 0;
if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL) if ((sclp_facilities & 0xe00000000000ULL) != 0xe00000000000ULL)
......
...@@ -433,6 +433,20 @@ static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area) ...@@ -433,6 +433,20 @@ static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
" failed (rc=%d).\n", ret); " failed (rc=%d).\n", ret);
} }
static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
{
int ret;
CIO_CRW_EVENT(4, "chsc: scm available information\n");
if (sei_area->rs != 7)
return;
ret = scm_process_availability_information();
if (ret)
CIO_CRW_EVENT(0, "chsc: process availability information"
" failed (rc=%d).\n", ret);
}
static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area) static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
{ {
switch (sei_area->cc) { switch (sei_area->cc) {
...@@ -468,6 +482,9 @@ static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area) ...@@ -468,6 +482,9 @@ static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
case 12: /* scm change notification */ case 12: /* scm change notification */
chsc_process_sei_scm_change(sei_area); chsc_process_sei_scm_change(sei_area);
break; break;
case 14: /* scm available notification */
chsc_process_sei_scm_avail(sei_area);
break;
default: /* other stuff */ default: /* other stuff */
CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n", CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
sei_area->cc); sei_area->cc);
......
...@@ -156,8 +156,10 @@ int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token); ...@@ -156,8 +156,10 @@ int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
#ifdef CONFIG_SCM_BUS #ifdef CONFIG_SCM_BUS
int scm_update_information(void); int scm_update_information(void);
int scm_process_availability_information(void);
#else /* CONFIG_SCM_BUS */ #else /* CONFIG_SCM_BUS */
static inline int scm_update_information(void) { return 0; } static inline int scm_update_information(void) { return 0; }
static inline int scm_process_availability_information(void) { return 0; }
#endif /* CONFIG_SCM_BUS */ #endif /* CONFIG_SCM_BUS */
......
...@@ -211,7 +211,7 @@ static void scmdev_update(struct scm_device *scmdev, struct sale *sale) ...@@ -211,7 +211,7 @@ static void scmdev_update(struct scm_device *scmdev, struct sale *sale)
goto out; goto out;
scmdrv = to_scm_drv(scmdev->dev.driver); scmdrv = to_scm_drv(scmdev->dev.driver);
if (changed && scmdrv->notify) if (changed && scmdrv->notify)
scmdrv->notify(scmdev); scmdrv->notify(scmdev, SCM_CHANGE);
out: out:
device_unlock(&scmdev->dev); device_unlock(&scmdev->dev);
if (changed) if (changed)
...@@ -297,6 +297,22 @@ int scm_update_information(void) ...@@ -297,6 +297,22 @@ int scm_update_information(void)
return ret; return ret;
} }
static int scm_dev_avail(struct device *dev, void *unused)
{
struct scm_driver *scmdrv = to_scm_drv(dev->driver);
struct scm_device *scmdev = to_scm_dev(dev);
if (dev->driver && scmdrv->notify)
scmdrv->notify(scmdev, SCM_AVAIL);
return 0;
}
int scm_process_availability_information(void)
{
return bus_for_each_dev(&scm_bus_type, NULL, NULL, scm_dev_avail);
}
static int __init scm_init(void) static int __init scm_init(void)
{ {
int ret; int ret;
......
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