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

Pull s390 update from Martin Schwidefsky:
 "An additional sysfs attribute for channel paths and a couple of bux
  fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/pgtable: fix ipte notify bit
  s390/xpram: mark xpram as non-rotational
  s390/smp: fix cpu re-scan vs. cpu state
  s390/cio: add channel ID sysfs attribute
  s390/ftrace: fix mcount adjustment
  s390: fix gmap_ipte_notifier vs. software dirty pages
  s390: disable pfmf for clear page instruction
  s390/disassembler: prevent endless loop in print_fn_code()
  s390: remove non existent reference to GENERIC_KERNEL_THREAD
This commit is contained in:
Linus Torvalds 2013-05-21 09:36:46 -07:00
parent aa03381046 6b8224e40a
commit c4ad180f0e
13 changed files with 67 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/s390/Kconfig
View File

@ -98,7 +98,6 @@ config S390
select CLONE_BACKWARDS2
select GENERIC_CLOCKEVENTS
select GENERIC_CPU_DEVICES if !SMP
select GENERIC_KERNEL_THREAD
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL_OLD
select HAVE_ALIGNED_STRUCT_PAGE if SLUB

12
arch/s390/include/asm/ftrace.h
View File

@ -9,11 +9,6 @@ struct dyn_arch_ftrace { };
#define MCOUNT_ADDR ((long)_mcount)
#ifdef CONFIG_64BIT
#define MCOUNT_INSN_SIZE 12
#else
#define MCOUNT_INSN_SIZE 20
#endif
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
@ -21,4 +16,11 @@ static inline unsigned long ftrace_call_adjust(unsigned long addr)
}
#endif /* __ASSEMBLY__ */
#ifdef CONFIG_64BIT
#define MCOUNT_INSN_SIZE 12
#else
#define MCOUNT_INSN_SIZE 22
#endif
#endif /* _ASM_S390_FTRACE_H */

6
arch/s390/include/asm/page.h
View File

@ -32,7 +32,7 @@
void storage_key_init_range(unsigned long start, unsigned long end);
static unsigned long pfmf(unsigned long function, unsigned long address)
static inline unsigned long pfmf(unsigned long function, unsigned long address)
{
asm volatile(
" .insn rre,0xb9af0000,%[function],%[address]"
@ -44,9 +44,6 @@ static unsigned long pfmf(unsigned long function, unsigned long address)
static inline void clear_page(void *page)
{
if (MACHINE_HAS_PFMF) {
pfmf(0x10000, (unsigned long)page);
} else {
register unsigned long reg1 asm ("1") = 0;
register void *reg2 asm ("2") = page;
register unsigned long reg3 asm ("3") = 4096;
@ -55,7 +52,6 @@ static inline void clear_page(void *page)
: "+d" (reg2), "+d" (reg3) : "d" (reg1)
: "memory", "cc");
}
}
static inline void copy_page(void *to, void *from)
{

4
arch/s390/include/asm/pgtable.h
View File

@ -306,7 +306,7 @@ extern unsigned long MODULES_END;
#define RCP_HC_BIT 0x00200000UL
#define RCP_GR_BIT 0x00040000UL
#define RCP_GC_BIT 0x00020000UL
#define RCP_IN_BIT 0x00008000UL /* IPTE notify bit */
#define RCP_IN_BIT 0x00002000UL /* IPTE notify bit */
/* User dirty / referenced bit for KVM's migration feature */
#define KVM_UR_BIT 0x00008000UL
@ -374,7 +374,7 @@ extern unsigned long MODULES_END;
#define RCP_HC_BIT 0x0020000000000000UL
#define RCP_GR_BIT 0x0004000000000000UL
#define RCP_GC_BIT 0x0002000000000000UL
#define RCP_IN_BIT 0x0000800000000000UL /* IPTE notify bit */
#define RCP_IN_BIT 0x0000200000000000UL /* IPTE notify bit */
/* User dirty / referenced bit for KVM's migration feature */
#define KVM_UR_BIT 0x0000800000000000UL

2
arch/s390/kernel/dis.c
View File

@ -1862,6 +1862,8 @@ void print_fn_code(unsigned char *code, unsigned long len)
while (len) {
ptr = buffer;
opsize = insn_length(*code);
if (opsize > len)
break;
ptr += sprintf(ptr, "%p: ", code);
for (i = 0; i < opsize; i++)
ptr += sprintf(ptr, "%02x", code[i]);

9
arch/s390/kernel/ftrace.c
View File

@ -16,12 +16,6 @@
#include <trace/syscall.h>
#include <asm/asm-offsets.h>
#ifdef CONFIG_64BIT
#define MCOUNT_OFFSET_RET 12
#else
#define MCOUNT_OFFSET_RET 22
#endif
#ifdef CONFIG_DYNAMIC_FTRACE
void ftrace_disable_code(void);
@ -155,9 +149,10 @@ unsigned long __kprobes prepare_ftrace_return(unsigned long parent,
if (unlikely(atomic_read(&current->tracing_graph_pause)))
goto out;
ip = (ip & PSW_ADDR_INSN) - MCOUNT_INSN_SIZE;
if (ftrace_push_return_trace(parent, ip, &trace.depth, 0) == -EBUSY)
goto out;
trace.func = (ip & PSW_ADDR_INSN) - MCOUNT_OFFSET_RET;
trace.func = ip;
/* Only trace if the calling function expects to. */
if (!ftrace_graph_entry(&trace)) {
current->curr_ret_stack--;

2
arch/s390/kernel/mcount.S
View File

@ -7,6 +7,7 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/ftrace.h>
.section .kprobes.text, "ax"
@ -33,6 +34,7 @@ ENTRY(ftrace_caller)
la %r2,0(%r14)
st %r0,__SF_BACKCHAIN(%r15)
la %r3,0(%r3)
ahi %r2,-MCOUNT_INSN_SIZE
l %r14,0b-0b(%r1)
l %r14,0(%r14)
basr %r14,%r14

2
arch/s390/kernel/mcount64.S
View File

@ -7,6 +7,7 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/ftrace.h>
.section .kprobes.text, "ax"
@ -29,6 +30,7 @@ ENTRY(ftrace_caller)
stg %r1,__SF_BACKCHAIN(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
aghi %r2,-MCOUNT_INSN_SIZE
larl %r14,ftrace_trace_function
lg %r14,0(%r14)
basr %r14,%r14

2
arch/s390/kernel/smp.c
View File

@ -645,7 +645,7 @@ static int __cpuinit __smp_rescan_cpus(struct sclp_cpu_info *info,
continue;
pcpu = pcpu_devices + cpu;
pcpu->address = info->cpu[i].address;
pcpu->state = (cpu >= info->configured) ?
pcpu->state = (i >= info->configured) ?
CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
set_cpu_present(cpu, true);

3
arch/s390/mm/pgtable.c
View File

@ -677,8 +677,7 @@ int gmap_ipte_notify(struct gmap *gmap, unsigned long start, unsigned long len)
break;
}
/* Get the page mapped */
if (get_user_pages(current, gmap->mm, addr, 1, 1, 0,
NULL, NULL) != 1) {
if (fixup_user_fault(current, gmap->mm, addr, FAULT_FLAG_WRITE)) {
rc = -EFAULT;
break;
}

1
drivers/s390/block/xpram.c
View File

@ -343,6 +343,7 @@ static int __init xpram_setup_blkdev(void)
put_disk(xpram_disks[i]);
goto out;
}
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, xpram_queues[i]);
blk_queue_make_request(xpram_queues[i], xpram_make_request);
blk_queue_logical_block_size(xpram_queues[i], 4096);
}

36
drivers/s390/cio/chp.c
View File

@ -352,12 +352,48 @@ static ssize_t chp_shared_show(struct device *dev,
static DEVICE_ATTR(shared, 0444, chp_shared_show, NULL);
static ssize_t chp_chid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct channel_path *chp = to_channelpath(dev);
ssize_t rc;
mutex_lock(&chp->lock);
if (chp->desc_fmt1.flags & 0x10)
rc = sprintf(buf, "%04x\n", chp->desc_fmt1.chid);
else
rc = 0;
mutex_unlock(&chp->lock);
return rc;
}
static DEVICE_ATTR(chid, 0444, chp_chid_show, NULL);
static ssize_t chp_chid_external_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_path *chp = to_channelpath(dev);
ssize_t rc;
mutex_lock(&chp->lock);
if (chp->desc_fmt1.flags & 0x10)
rc = sprintf(buf, "%x\n", chp->desc_fmt1.flags & 0x8 ? 1 : 0);
else
rc = 0;
mutex_unlock(&chp->lock);
return rc;
}
static DEVICE_ATTR(chid_external, 0444, chp_chid_external_show, NULL);
static struct attribute *chp_attrs[] = {
&dev_attr_status.attr,
&dev_attr_configure.attr,
&dev_attr_type.attr,
&dev_attr_cmg.attr,
&dev_attr_shared.attr,
&dev_attr_chid.attr,
&dev_attr_chid_external.attr,
NULL,
};
static struct attribute_group chp_attr_group = {

4
drivers/s390/cio/chsc.h
View File

@ -43,7 +43,9 @@ struct channel_path_desc_fmt1 {
u8 chpid;
u32:24;
u8 chpp;
u32 unused[3];
u32 unused[2];
u16 chid;
u32:16;
u16 mdc;
u16:13;
u8 r:1;