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-rw-r--r--Documentation/s390/CommonIO12
-rw-r--r--arch/s390/include/asm/pgtable.h66
-rw-r--r--arch/s390/include/asm/setup.h9
-rw-r--r--arch/s390/kernel/Makefile2
-rw-r--r--arch/s390/kernel/crash_dump.c6
-rw-r--r--arch/s390/kernel/early.c1
-rw-r--r--arch/s390/kernel/mem_detect.c145
-rw-r--r--arch/s390/kernel/setup.c65
-rw-r--r--arch/s390/lib/uaccess_pt.c3
-rw-r--r--arch/s390/mm/Makefile2
-rw-r--r--arch/s390/mm/init.c11
-rw-r--r--arch/s390/mm/mem_detect.c134
-rw-r--r--arch/s390/mm/pgtable.c121
-rw-r--r--arch/s390/mm/vmem.c8
-rw-r--r--drivers/s390/char/sclp_cmd.c20
-rw-r--r--drivers/s390/char/zcore.c34
-rw-r--r--drivers/s390/cio/blacklist.c28
-rw-r--r--drivers/s390/crypto/ap_bus.c17
18 files changed, 415 insertions, 269 deletions
diff --git a/Documentation/s390/CommonIO b/Documentation/s390/CommonIO
index d378cba66456..6e0f63f343b4 100644
--- a/Documentation/s390/CommonIO
+++ b/Documentation/s390/CommonIO
@@ -8,9 +8,9 @@ Command line parameters
Enable logging of debug information in case of ccw device timeouts.
-* cio_ignore = {all} |
- {<device> | <range of devices>} |
- {!<device> | !<range of devices>}
+* cio_ignore = device[,device[,..]]
+
+ device := {all | [!]ipldev | [!]condev | [!]<devno> | [!]<devno>-<devno>}
The given devices will be ignored by the common I/O-layer; no detection
and device sensing will be done on any of those devices. The subchannel to
@@ -24,8 +24,10 @@ Command line parameters
device numbers (0xabcd or abcd, for 2.4 backward compatibility). If you
give a device number 0xabcd, it will be interpreted as 0.0.abcd.
- You can use the 'all' keyword to ignore all devices.
- The '!' operator will cause the I/O-layer to _not_ ignore a device.
+ You can use the 'all' keyword to ignore all devices. The 'ipldev' and 'condev'
+ keywords can be used to refer to the CCW based boot device and CCW console
+ device respectively (these are probably useful only when combined with the '!'
+ operator). The '!' operator will cause the I/O-layer to _not_ ignore a device.
The command line is parsed from left to right.
For example,
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index b4622915bd15..4105b8221fdd 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -306,6 +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 */
/* User dirty / referenced bit for KVM's migration feature */
#define KVM_UR_BIT 0x00008000UL
@@ -373,6 +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 */
/* User dirty / referenced bit for KVM's migration feature */
#define KVM_UR_BIT 0x0000800000000000UL
@@ -746,30 +748,42 @@ struct gmap {
/**
* struct gmap_rmap - reverse mapping for segment table entries
- * @next: pointer to the next gmap_rmap structure in the list
+ * @gmap: pointer to the gmap_struct
* @entry: pointer to a segment table entry
+ * @vmaddr: virtual address in the guest address space
*/
struct gmap_rmap {
struct list_head list;
+ struct gmap *gmap;
unsigned long *entry;
+ unsigned long vmaddr;
};
/**
* struct gmap_pgtable - gmap information attached to a page table
* @vmaddr: address of the 1MB segment in the process virtual memory
- * @mapper: list of segment table entries maping a page table
+ * @mapper: list of segment table entries mapping a page table
*/
struct gmap_pgtable {
unsigned long vmaddr;
struct list_head mapper;
};
+/**
+ * struct gmap_notifier - notify function block for page invalidation
+ * @notifier_call: address of callback function
+ */
+struct gmap_notifier {
+ struct list_head list;
+ void (*notifier_call)(struct gmap *gmap, unsigned long address);
+};
+
struct gmap *gmap_alloc(struct mm_struct *mm);
void gmap_free(struct gmap *gmap);
void gmap_enable(struct gmap *gmap);
void gmap_disable(struct gmap *gmap);
int gmap_map_segment(struct gmap *gmap, unsigned long from,
- unsigned long to, unsigned long length);
+ unsigned long to, unsigned long len);
int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len);
unsigned long __gmap_translate(unsigned long address, struct gmap *);
unsigned long gmap_translate(unsigned long address, struct gmap *);
@@ -777,6 +791,24 @@ unsigned long __gmap_fault(unsigned long address, struct gmap *);
unsigned long gmap_fault(unsigned long address, struct gmap *);
void gmap_discard(unsigned long from, unsigned long to, struct gmap *);
+void gmap_register_ipte_notifier(struct gmap_notifier *);
+void gmap_unregister_ipte_notifier(struct gmap_notifier *);
+int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len);
+void gmap_do_ipte_notify(struct mm_struct *, unsigned long addr, pte_t *);
+
+static inline pgste_t pgste_ipte_notify(struct mm_struct *mm,
+ unsigned long addr,
+ pte_t *ptep, pgste_t pgste)
+{
+#ifdef CONFIG_PGSTE
+ if (pgste_val(pgste) & RCP_IN_BIT) {
+ pgste_val(pgste) &= ~RCP_IN_BIT;
+ gmap_do_ipte_notify(mm, addr, ptep);
+ }
+#endif
+ return pgste;
+}
+
/*
* Certain architectures need to do special things when PTEs
* within a page table are directly modified. Thus, the following
@@ -1032,8 +1064,10 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
pte_t pte;
mm->context.flush_mm = 1;
- if (mm_has_pgste(mm))
+ if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
+ }
pte = *ptep;
if (!mm_exclusive(mm))
@@ -1052,11 +1086,14 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
unsigned long address,
pte_t *ptep)
{
+ pgste_t pgste;
pte_t pte;
mm->context.flush_mm = 1;
- if (mm_has_pgste(mm))
- pgste_get_lock(ptep);
+ if (mm_has_pgste(mm)) {
+ pgste = pgste_get_lock(ptep);
+ pgste_ipte_notify(mm, address, ptep, pgste);
+ }
pte = *ptep;
if (!mm_exclusive(mm))
@@ -1082,8 +1119,10 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
pgste_t pgste;
pte_t pte;
- if (mm_has_pgste(vma->vm_mm))
+ if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
+ pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
+ }
pte = *ptep;
__ptep_ipte(address, ptep);
@@ -1111,8 +1150,11 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
pgste_t pgste;
pte_t pte;
- if (mm_has_pgste(mm))
+ if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
+ if (!full)
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
+ }
pte = *ptep;
if (!full)
@@ -1135,8 +1177,10 @@ static inline pte_t ptep_set_wrprotect(struct mm_struct *mm,
if (pte_write(pte)) {
mm->context.flush_mm = 1;
- if (mm_has_pgste(mm))
+ if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
+ }
if (!mm_exclusive(mm))
__ptep_ipte(address, ptep);
@@ -1160,8 +1204,10 @@ static inline int ptep_set_access_flags(struct vm_area_struct *vma,
if (pte_same(*ptep, entry))
return 0;
- if (mm_has_pgste(vma->vm_mm))
+ if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
+ pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
+ }
__ptep_ipte(address, ptep);
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index ff67d730c00c..59880dbaf360 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -33,8 +33,6 @@
#define CHUNK_READ_WRITE 0
#define CHUNK_READ_ONLY 1
-#define CHUNK_OLDMEM 4
-#define CHUNK_CRASHK 5
struct mem_chunk {
unsigned long addr;
@@ -43,13 +41,12 @@ struct mem_chunk {
};
extern struct mem_chunk memory_chunk[];
-extern unsigned long real_memory_size;
extern int memory_end_set;
extern unsigned long memory_end;
-void detect_memory_layout(struct mem_chunk chunk[]);
-void create_mem_hole(struct mem_chunk memory_chunk[], unsigned long addr,
- unsigned long size, int type);
+void detect_memory_layout(struct mem_chunk chunk[], unsigned long maxsize);
+void create_mem_hole(struct mem_chunk mem_chunk[], unsigned long addr,
+ unsigned long size);
#define PRIMARY_SPACE_MODE 0
#define ACCESS_REGISTER_MODE 1
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 1386fcaf4ef6..4bb2a4656163 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -30,7 +30,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o vtime.o
obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
-obj-y += debug.o irq.o ipl.o dis.o diag.o mem_detect.o sclp.o vdso.o
+obj-y += debug.o irq.o ipl.o dis.o diag.o sclp.o vdso.o
obj-y += sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
obj-y += dumpstack.o
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index fb8d8781a011..f703d91bf720 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -88,8 +88,8 @@ static struct mem_chunk *get_memory_layout(void)
struct mem_chunk *chunk_array;
chunk_array = kzalloc_panic(MEMORY_CHUNKS * sizeof(struct mem_chunk));
- detect_memory_layout(chunk_array);
- create_mem_hole(chunk_array, OLDMEM_BASE, OLDMEM_SIZE, CHUNK_CRASHK);
+ detect_memory_layout(chunk_array, 0);
+ create_mem_hole(chunk_array, OLDMEM_BASE, OLDMEM_SIZE);
return chunk_array;
}
@@ -344,7 +344,7 @@ static int loads_init(Elf64_Phdr *phdr, u64 loads_offset)
for (i = 0; i < MEMORY_CHUNKS; i++) {
mem_chunk = &chunk_array[i];
if (mem_chunk->size == 0)
- break;
+ continue;
if (chunk_array[i].type != CHUNK_READ_WRITE &&
chunk_array[i].type != CHUNK_READ_ONLY)
continue;
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index bda011e2f8ae..dc8770d7173c 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -482,7 +482,6 @@ void __init startup_init(void)
detect_machine_facilities();
setup_topology();
sclp_facilities_detect();
- detect_memory_layout(memory_chunk);
#ifdef CONFIG_DYNAMIC_FTRACE
S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
#endif
diff --git a/arch/s390/kernel/mem_detect.c b/arch/s390/kernel/mem_detect.c
deleted file mode 100644
index 22d502e885ed..000000000000
--- a/arch/s390/kernel/mem_detect.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * Copyright IBM Corp. 2008, 2009
- *
- * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/ipl.h>
-#include <asm/sclp.h>
-#include <asm/setup.h>
-
-#define ADDR2G (1ULL << 31)
-
-static void find_memory_chunks(struct mem_chunk chunk[])
-{
- unsigned long long memsize, rnmax, rzm;
- unsigned long addr = 0, size;
- int i = 0, type;
-
- rzm = sclp_get_rzm();
- rnmax = sclp_get_rnmax();
- memsize = rzm * rnmax;
- if (!rzm)
- rzm = 1ULL << 17;
- if (sizeof(long) == 4) {
- rzm = min(ADDR2G, rzm);
- memsize = memsize ? min(ADDR2G, memsize) : ADDR2G;
- }
- do {
- size = 0;
- type = tprot(addr);
- do {
- size += rzm;
- if (memsize && addr + size >= memsize)
- break;
- } while (type == tprot(addr + size));
- if (type == CHUNK_READ_WRITE || type == CHUNK_READ_ONLY) {
- chunk[i].addr = addr;
- chunk[i].size = size;
- chunk[i].type = type;
- i++;
- }
- addr += size;
- } while (addr < memsize && i < MEMORY_CHUNKS);
-}
-
-void detect_memory_layout(struct mem_chunk chunk[])
-{
- unsigned long flags, cr0;
-
- memset(chunk, 0, MEMORY_CHUNKS * sizeof(struct mem_chunk));
- /* Disable IRQs, DAT and low address protection so tprot does the
- * right thing and we don't get scheduled away with low address
- * protection disabled.
- */
- flags = __arch_local_irq_stnsm(0xf8);
- __ctl_store(cr0, 0, 0);
- __ctl_clear_bit(0, 28);
- find_memory_chunks(chunk);
- __ctl_load(cr0, 0, 0);
- arch_local_irq_restore(flags);
-}
-EXPORT_SYMBOL(detect_memory_layout);
-
-/*
- * Move memory chunks array from index "from" to index "to"
- */
-static void mem_chunk_move(struct mem_chunk chunk[], int to, int from)
-{
- int cnt = MEMORY_CHUNKS - to;
-
- memmove(&chunk[to], &chunk[from], cnt * sizeof(struct mem_chunk));
-}
-
-/*
- * Initialize memory chunk
- */
-static void mem_chunk_init(struct mem_chunk *chunk, unsigned long addr,
- unsigned long size, int type)
-{
- chunk->type = type;
- chunk->addr = addr;
- chunk->size = size;
-}
-
-/*
- * Create memory hole with given address, size, and type
- */
-void create_mem_hole(struct mem_chunk chunk[], unsigned long addr,
- unsigned long size, int type)
-{
- unsigned long lh_start, lh_end, lh_size, ch_start, ch_end, ch_size;
- int i, ch_type;
-
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- if (chunk[i].size == 0)
- continue;
-
- /* Define chunk properties */
- ch_start = chunk[i].addr;
- ch_size = chunk[i].size;
- ch_end = ch_start + ch_size - 1;
- ch_type = chunk[i].type;
-
- /* Is memory chunk hit by memory hole? */
- if (addr + size <= ch_start)
- continue; /* No: memory hole in front of chunk */
- if (addr > ch_end)
- continue; /* No: memory hole after chunk */
-
- /* Yes: Define local hole properties */
- lh_start = max(addr, chunk[i].addr);
- lh_end = min(addr + size - 1, ch_end);
- lh_size = lh_end - lh_start + 1;
-
- if (lh_start == ch_start && lh_end == ch_end) {
- /* Hole covers complete memory chunk */
- mem_chunk_init(&chunk[i], lh_start, lh_size, type);
- } else if (lh_end == ch_end) {
- /* Hole starts in memory chunk and convers chunk end */
- mem_chunk_move(chunk, i + 1, i);
- mem_chunk_init(&chunk[i], ch_start, ch_size - lh_size,
- ch_type);
- mem_chunk_init(&chunk[i + 1], lh_start, lh_size, type);
- i += 1;
- } else if (lh_start == ch_start) {
- /* Hole ends in memory chunk */
- mem_chunk_move(chunk, i + 1, i);
- mem_chunk_init(&chunk[i], lh_start, lh_size, type);
- mem_chunk_init(&chunk[i + 1], lh_end + 1,
- ch_size - lh_size, ch_type);
- break;
- } else {
- /* Hole splits memory chunk */
- mem_chunk_move(chunk, i + 2, i);
- mem_chunk_init(&chunk[i], ch_start,
- lh_start - ch_start, ch_type);
- mem_chunk_init(&chunk[i + 1], lh_start, lh_size, type);
- mem_chunk_init(&chunk[i + 2], lh_end + 1,
- ch_end - lh_end, ch_type);
- break;
- }
- }
-}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 0f419c5765c8..0a49095104c9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -226,25 +226,17 @@ static void __init conmode_default(void)
}
#ifdef CONFIG_ZFCPDUMP
-static void __init setup_zfcpdump(unsigned int console_devno)
+static void __init setup_zfcpdump(void)
{
- static char str[41];
-
if (ipl_info.type != IPL_TYPE_FCP_DUMP)
return;
if (OLDMEM_BASE)
return;
- if (console_devno != -1)
- sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x",
- ipl_info.data.fcp.dev_id.devno, console_devno);
- else
- sprintf(str, " cio_ignore=all,!0.0.%04x",
- ipl_info.data.fcp.dev_id.devno);
- strcat(boot_command_line, str);
+ strcat(boot_command_line, " cio_ignore=all,!ipldev,!condev");
console_loglevel = 2;
}
#else
-static inline void setup_zfcpdump(unsigned int console_devno) {}
+static inline void setup_zfcpdump(void) {}
#endif /* CONFIG_ZFCPDUMP */
/*
@@ -471,14 +463,10 @@ static void __init setup_resources(void)
for (i = 0; i < MEMORY_CHUNKS; i++) {
if (!memory_chunk[i].size)
continue;
- if (memory_chunk[i].type == CHUNK_OLDMEM ||
- memory_chunk[i].type == CHUNK_CRASHK)
- continue;
res = alloc_bootmem_low(sizeof(*res));
res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
switch (memory_chunk[i].type) {
case CHUNK_READ_WRITE:
- case CHUNK_CRASHK:
res->name = "System RAM";
break;
case CHUNK_READ_ONLY:
@@ -510,12 +498,10 @@ static void __init setup_resources(void)
}
}
-unsigned long real_memory_size;
-EXPORT_SYMBOL_GPL(real_memory_size);
-
static void __init setup_memory_end(void)
{
unsigned long vmax, vmalloc_size, tmp;
+ unsigned long real_memory_size = 0;
int i;
@@ -525,7 +511,6 @@ static void __init setup_memory_end(void)
memory_end_set = 1;
}
#endif
- real_memory_size = 0;
memory_end &= PAGE_MASK;
/*
@@ -538,6 +523,8 @@ static void __init setup_memory_end(void)
unsigned long align;
chunk = &memory_chunk[i];
+ if (!chunk->size)
+ continue;
align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1);
start = (chunk->addr + align - 1) & ~(align - 1);
end = (chunk->addr + chunk->size) & ~(align - 1);
@@ -588,6 +575,8 @@ static void __init setup_memory_end(void)
for (i = 0; i < MEMORY_CHUNKS; i++) {
struct mem_chunk *chunk = &memory_chunk[i];
+ if (!chunk->size)
+ continue;
if (chunk->addr >= memory_end) {
memset(chunk, 0, sizeof(*chunk));
continue;
@@ -688,15 +677,6 @@ static int __init verify_crash_base(unsigned long crash_base,
}
/*
- * Reserve kdump memory by creating a memory hole in the mem_chunk array
- */
-static void __init reserve_kdump_bootmem(unsigned long addr, unsigned long size,
- int type)
-{
- create_mem_hole(memory_chunk, addr, size, type);
-}
-
-/*
* When kdump is enabled, we have to ensure that no memory from
* the area [0 - crashkernel memory size] and
* [crashk_res.start - crashk_res.end] is set offline.
@@ -727,16 +707,22 @@ static struct notifier_block kdump_mem_nb = {
static void reserve_oldmem(void)
{
#ifdef CONFIG_CRASH_DUMP
+ unsigned long real_size = 0;
+ int i;
+
if (!OLDMEM_BASE)
return;
+ for (i = 0; i < MEMORY_CHUNKS; i++) {
+ struct mem_chunk *chunk = &memory_chunk[i];
- reserve_kdump_bootmem(OLDMEM_BASE, OLDMEM_SIZE, CHUNK_OLDMEM);
- reserve_kdump_bootmem(OLDMEM_SIZE, memory_end - OLDMEM_SIZE,
- CHUNK_OLDMEM);
- if (OLDMEM_BASE + OLDMEM_SIZE == real_memory_size)
+ real_size = max(real_size, chunk->addr + chunk->size);
+ }
+ create_mem_hole(memory_chunk, OLDMEM_BASE, OLDMEM_SIZE);
+ create_mem_hole(memory_chunk, OLDMEM_SIZE, real_size - OLDMEM_SIZE);
+ if (OLDMEM_BASE + OLDMEM_SIZE == real_size)
saved_max_pfn = PFN_DOWN(OLDMEM_BASE) - 1;
else
- saved_max_pfn = PFN_DOWN(real_memory_size) - 1;
+ saved_max_pfn = PFN_DOWN(real_size) - 1;
#endif
}
@@ -775,7 +761,7 @@ static void __init reserve_crashkernel(void)
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
insert_resource(&iomem_resource, &crashk_res);
- reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK);
+ create_mem_hole(memory_chunk, crash_base, crash_size);
pr_info("Reserving %lluMB of memory at %lluMB "
"for crashkernel (System RAM: %luMB)\n",
crash_size >> 20, crash_base >> 20, memory_end >> 20);
@@ -847,11 +833,10 @@ static void __init setup_memory(void)
* Register RAM areas with the bootmem allocator.
*/
- for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
+ for (i = 0; i < MEMORY_CHUNKS; i++) {
unsigned long start_chunk, end_chunk, pfn;
- if (memory_chunk[i].type != CHUNK_READ_WRITE &&
- memory_chunk[i].type != CHUNK_CRASHK)
+ if (!memory_chunk[i].size)
continue;
start_chunk = PFN_DOWN(memory_chunk[i].addr);
end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size);
@@ -1067,12 +1052,12 @@ void __init setup_arch(char **cmdline_p)
memcpy(&uaccess, &uaccess_std, sizeof(uaccess));
parse_early_param();
-
+ detect_memory_layout(memory_chunk, memory_end);
os_info_init();
setup_ipl();
+ reserve_oldmem();
setup_memory_end();
setup_addressing_mode();
- reserve_oldmem();
reserve_crashkernel();
setup_memory();
setup_resources();
@@ -1097,5 +1082,5 @@ void __init setup_arch(char **cmdline_p)
set_preferred_console();
/* Setup zfcpdump support */
- setup_zfcpdump(console_devno);
+ setup_zfcpdump();
}
diff --git a/arch/s390/lib/uaccess_pt.c b/arch/s390/lib/uaccess_pt.c
index 466fb3383960..50ea137a2d3c 100644
--- a/arch/s390/lib/uaccess_pt.c
+++ b/arch/s390/lib/uaccess_pt.c
@@ -89,16 +89,19 @@ static unsigned long follow_table(struct mm_struct *mm,
if (unlikely(*table & _REGION_ENTRY_INV))
return -0x39UL;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+ /* fallthrough */
case _ASCE_TYPE_REGION2:
table = table + ((address >> 42) & 0x7ff);
if (unlikely(*table & _REGION_ENTRY_INV))
return -0x3aUL;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+ /* fallthrough */
case _ASCE_TYPE_REGION3:
table = table + ((address >> 31) & 0x7ff);
if (unlikely(*table & _REGION_ENTRY_INV))
return -0x3bUL;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
+ /* fallthrough */
case _ASCE_TYPE_SEGMENT:
table = table + ((address >> 20) & 0x7ff);
if (unlikely(*table & _SEGMENT_ENTRY_INV))
diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile
index 640bea12303c..839592ca265c 100644
--- a/arch/s390/mm/Makefile
+++ b/arch/s390/mm/Makefile
@@ -3,7 +3,7 @@
#
obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o maccess.o
-obj-y += page-states.o gup.o extable.o pageattr.o
+obj-y += page-states.o gup.o extable.o pageattr.o mem_detect.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 0b09b2342302..89ebae4008f2 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -21,6 +21,7 @@
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/bootmem.h>
+#include <linux/memory.h>
#include <linux/pfn.h>
#include <linux/poison.h>
#include <linux/initrd.h>
@@ -36,6 +37,7 @@
#include <asm/tlbflush.h>
#include <asm/sections.h>
#include <asm/ctl_reg.h>
+#include <asm/sclp.h>
pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE)));
@@ -214,6 +216,15 @@ int arch_add_memory(int nid, u64 start, u64 size)
return rc;
}
+unsigned long memory_block_size_bytes(void)
+{
+ /*
+ * Make sure the memory block size is always greater
+ * or equal than the memory increment size.
+ */
+ return max_t(unsigned long, MIN_MEMORY_BLOCK_SIZE, sclp_get_rzm());
+}
+
#ifdef CONFIG_MEMORY_HOTREMOVE
int arch_remove_memory(u64 start, u64 size)
{
diff --git a/arch/s390/mm/mem_detect.c b/arch/s390/mm/mem_detect.c
new file mode 100644
index 000000000000..3cbd3b8bf311
--- /dev/null
+++ b/arch/s390/mm/mem_detect.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright IBM Corp. 2008, 2009
+ *
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <asm/ipl.h>
+#include <asm/sclp.h>
+#include <asm/setup.h>
+
+#define ADDR2G (1ULL << 31)
+
+static void find_memory_chunks(struct mem_chunk chunk[], unsigned long maxsize)
+{
+ unsigned long long memsize, rnmax, rzm;
+ unsigned long addr = 0, size;
+ int i = 0, type;
+
+ rzm = sclp_get_rzm();
+ rnmax = sclp_get_rnmax();
+ memsize = rzm * rnmax;
+ if (!rzm)
+ rzm = 1ULL << 17;
+ if (sizeof(long) == 4) {
+ rzm = min(ADDR2G, rzm);
+ memsize = memsize ? min(ADDR2G, memsize) : ADDR2G;
+ }
+ if (maxsize)
+ memsize = memsize ? min((unsigned long)memsize, maxsize) : maxsize;
+ do {
+ size = 0;
+ type = tprot(addr);
+ do {
+ size += rzm;
+ if (memsize && addr + size >= memsize)
+ break;
+ } while (type == tprot(addr + size));
+ if (type == CHUNK_READ_WRITE || type == CHUNK_READ_ONLY) {
+ if (memsize && (addr + size > memsize))
+ size = memsize - addr;
+ chunk[i].addr = addr;
+ chunk[i].size = size;
+ chunk[i].type = type;
+ i++;
+ }
+ addr += size;
+ } while (addr < memsize && i < MEMORY_CHUNKS);
+}
+
+/**
+ * detect_memory_layout - fill mem_chunk array with memory layout data
+ * @chunk: mem_chunk array to be filled
+ * @maxsize: maximum address where memory detection should stop
+ *
+ * Fills the passed in memory chunk array with the memory layout of the
+ * machine. The array must have a size of at least MEMORY_CHUNKS and will
+ * be fully initialized afterwards.
+ * If the maxsize paramater has a value > 0 memory detection will stop at
+ * that address. It is guaranteed that all chunks have an ending address
+ * that is smaller than maxsize.
+ * If maxsize is 0 all memory will be detected.
+ */
+void detect_memory_layout(struct mem_chunk chunk[], unsigned long maxsize)
+{
+ unsigned long flags, flags_dat, cr0;
+
+ memset(chunk, 0, MEMORY_CHUNKS * sizeof(struct mem_chunk));
+ /*
+ * Disable IRQs, DAT and low address protection so tprot does the
+ * right thing and we don't get scheduled away with low address
+ * protection disabled.
+ */
+ local_irq_save(flags);
+ flags_dat = __arch_local_irq_stnsm(0xfb);
+ /*
+ * In case DAT was enabled, make sure chunk doesn't reside in vmalloc
+ * space. We have disabled DAT and any access to vmalloc area will
+ * cause an exception.
+ * If DAT was disabled we are called from early ipl code.
+ */
+ if (test_bit(5, &flags_dat)) {
+ if (WARN_ON_ONCE(is_vmalloc_or_module_addr(chunk)))
+ goto out;
+ }
+ __ctl_store(cr0, 0, 0);
+ __ctl_clear_bit(0, 28);
+ find_memory_chunks(chunk, maxsize);
+ __ctl_load(cr0, 0, 0);
+out:
+ __arch_local_irq_ssm(flags_dat);
+ local_irq_restore(flags);
+}
+EXPORT_SYMBOL(detect_memory_layout);
+
+/*
+ * Create memory hole with given address and size.
+ */
+void create_mem_hole(struct mem_chunk mem_chunk[], unsigned long addr,
+ unsigned long size)
+{
+ int i;
+
+ for (i = 0; i < MEMORY_CHUNKS; i++) {
+ struct mem_chunk *chunk = &mem_chunk[i];
+
+ if (chunk->size == 0)
+ continue;
+ if (addr > chunk->addr + chunk->size)
+ continue;
+ if (addr + size <= chunk->addr)
+ continue;
+ /* Split */
+ if ((addr > chunk->addr) &&
+ (addr + size < chunk->addr + chunk->size)) {
+ struct mem_chunk *new = chunk + 1;
+
+ memmove(new, chunk, (MEMORY_CHUNKS-i-1) * sizeof(*new));
+ new->addr = addr + size;
+ new->size = chunk->addr + chunk->size - new->addr;
+ chunk->size = addr - chunk->addr;
+ continue;
+ } else if ((addr <= chunk->addr) &&
+ (addr + size >= chunk->addr + chunk->size)) {
+ memset(chunk, 0 , sizeof(*chunk));
+ } else if (addr + size < chunk->addr + chunk->size) {
+ chunk->size = chunk->addr + chunk->size - addr - size;
+ chunk->addr = addr + size;
+ } else if (addr > chunk->addr) {
+ chunk->size = addr - chunk->addr;
+ }
+ }
+}
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index bd954e96f51c..7805ddca833d 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -454,9 +454,8 @@ unsigned long gmap_translate(unsigned long address, struct gmap *gmap)
}
EXPORT_SYMBOL_GPL(gmap_translate);
-static int gmap_connect_pgtable(unsigned long segment,
- unsigned long *segment_ptr,
- struct gmap *gmap)
+static int gmap_connect_pgtable(unsigned long address, unsigned long segment,
+ unsigned long *segment_ptr, struct gmap *gmap)
{
unsigned long vmaddr;
struct vm_area_struct *vma;
@@ -491,7 +490,9 @@ static int gmap_connect_pgtable(unsigned long segment,
/* Link gmap segment table entry location to page table. */
page = pmd_page(*pmd);
mp = (struct gmap_pgtable *) page->index;
+ rmap->gmap = gmap;
rmap->entry = segment_ptr;
+ rmap->vmaddr = address;
spin_lock(&mm->page_table_lock);
if (*segment_ptr == segment) {
list_add(&rmap->list, &mp->mapper);
@@ -553,7 +554,7 @@ unsigned long __gmap_fault(unsigned long address, struct gmap *gmap)
if (!(segment & _SEGMENT_ENTRY_RO))
/* Nothing mapped in the gmap address space. */
break;
- rc = gmap_connect_pgtable(segment, segment_ptr, gmap);
+ rc = gmap_connect_pgtable(address, segment, segment_ptr, gmap);
if (rc)
return rc;
}
@@ -619,6 +620,118 @@ void gmap_discard(unsigned long from, unsigned long to, struct gmap *gmap)
}
EXPORT_SYMBOL_GPL(gmap_discard);
+static LIST_HEAD(gmap_notifier_list);
+static DEFINE_SPINLOCK(gmap_notifier_lock);
+
+/**
+ * gmap_register_ipte_notifier - register a pte invalidation callback
+ * @nb: pointer to the gmap notifier block
+ */
+void gmap_register_ipte_notifier(struct gmap_notifier *nb)
+{
+ spin_lock(&gmap_notifier_lock);
+ list_add(&nb->list, &gmap_notifier_list);
+ spin_unlock(&gmap_notifier_lock);
+}
+EXPORT_SYMBOL_GPL(gmap_register_ipte_notifier);
+
+/**
+ * gmap_unregister_ipte_notifier - remove a pte invalidation callback
+ * @nb: pointer to the gmap notifier block
+ */
+void gmap_unregister_ipte_notifier(struct gmap_notifier *nb)
+{
+ spin_lock(&gmap_notifier_lock);
+ list_del_init(&nb->list);
+ spin_unlock(&gmap_notifier_lock);
+}
+EXPORT_SYMBOL_GPL(gmap_unregister_ipte_notifier);
+
+/**
+ * gmap_ipte_notify - mark a range of ptes for invalidation notification
+ * @gmap: pointer to guest mapping meta data structure
+ * @address: virtual address in the guest address space
+ * @len: size of area
+ *
+ * Returns 0 if for each page in the given range a gmap mapping exists and
+ * the invalidation notification could be set. If the gmap mapping is missing
+ * for one or more pages -EFAULT is returned. If no memory could be allocated
+ * -ENOMEM is returned. This function establishes missing page table entries.
+ */
+int gmap_ipte_notify(struct gmap *gmap, unsigned long start, unsigned long len)
+{
+ unsigned long addr;
+ spinlock_t *ptl;
+ pte_t *ptep, entry;
+ pgste_t pgste;
+ int rc = 0;
+
+ if ((start & ~PAGE_MASK) || (len & ~PAGE_MASK))
+ return -EINVAL;
+ down_read(&gmap->mm->mmap_sem);
+ while (len) {
+ /* Convert gmap address and connect the page tables */
+ addr = __gmap_fault(start, gmap);
+ if (IS_ERR_VALUE(addr)) {
+ rc = addr;
+ break;
+ }
+ /* Get the page mapped */
+ if (get_user_pages(current, gmap->mm, addr, 1, 1, 0,
+ NULL, NULL) != 1) {
+ rc = -EFAULT;
+ break;
+ }
+ /* Walk the process page table, lock and get pte pointer */
+ ptep = get_locked_pte(gmap->mm, addr, &ptl);
+ if (unlikely(!ptep))
+ continue;
+ /* Set notification bit in the pgste of the pte */
+ entry = *ptep;
+ if ((pte_val(entry) & (_PAGE_INVALID | _PAGE_RO)) == 0) {
+ pgste = pgste_get_lock(ptep);
+ pgste_val(pgste) |= RCP_IN_BIT;
+ pgste_set_unlock(ptep, pgste);
+ start += PAGE_SIZE;
+ len -= PAGE_SIZE;
+ }
+ spin_unlock(ptl);
+ }
+ up_read(&gmap->mm->mmap_sem);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(gmap_ipte_notify);
+
+/**
+ * gmap_do_ipte_notify - call all invalidation callbacks for a specific pte.
+ * @mm: pointer to the process mm_struct
+ * @addr: virtual address in the process address space
+ * @pte: pointer to the page table entry
+ *
+ * This function is assumed to be called with the page table lock held
+ * for the pte to notify.
+ */
+void gmap_do_ipte_notify(struct mm_struct *mm, unsigned long addr, pte_t *pte)
+{
+ unsigned long segment_offset;
+ struct gmap_notifier *nb;
+ struct gmap_pgtable *mp;
+ struct gmap_rmap *rmap;
+ struct page *page;
+
+ segment_offset = ((unsigned long) pte) & (255 * sizeof(pte_t));
+ segment_offset = segment_offset * (4096 / sizeof(pte_t));
+ page = pfn_to_page(__pa(pte) >> PAGE_SHIFT);
+ mp = (struct gmap_pgtable *) page->index;
+ spin_lock(&gmap_notifier_lock);
+ list_for_each_entry(rmap, &mp->mapper, list) {
+ list_for_each_entry(nb, &gmap_notifier_list, list)
+ nb->notifier_call(rmap->gmap,
+ rmap->vmaddr + segment_offset);
+ }
+ spin_unlock(&gmap_notifier_lock);
+}
+
static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm,
unsigned long vmaddr)
{
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 35837054f734..8b268fcc4612 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -375,9 +375,8 @@ void __init vmem_map_init(void)
ro_start = PFN_ALIGN((unsigned long)&_stext);
ro_end = (unsigned long)&_eshared & PAGE_MASK;
- for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
- if (memory_chunk[i].type == CHUNK_CRASHK ||
- memory_chunk[i].type == CHUNK_OLDMEM)
+ for (i = 0; i < MEMORY_CHUNKS; i++) {
+ if (!memory_chunk[i].size)
continue;
start = memory_chunk[i].addr;
end = memory_chunk[i].addr + memory_chunk[i].size;
@@ -412,9 +411,6 @@ static int __init vmem_convert_memory_chunk(void)
for (i = 0; i < MEMORY_CHUNKS; i++) {
if (!memory_chunk[i].size)
continue;
- if (memory_chunk[i].type == CHUNK_CRASHK ||
- memory_chunk[i].type == CHUNK_OLDMEM)
- continue;
seg = kzalloc(sizeof(*seg), GFP_KERNEL);
if (!seg)
panic("Out of memory...\n");
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 178836ec252b..bf07c3a188d4 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -345,7 +345,6 @@ struct memory_increment {
struct list_head list;
u16 rn;
int standby;
- int usecount;
};
struct assign_storage_sccb {
@@ -463,21 +462,10 @@ static int sclp_mem_change_state(unsigned long start, unsigned long size,
break;
if (start > istart + rzm - 1)
continue;
- if (online) {
- if (incr->usecount++)
- continue;
- /*
- * Don't break the loop if one assign fails. Loop may
- * be walked again on CANCEL and we can't save
- * information if state changed before or not.
- * So continue and increase usecount for all increments.
- */
+ if (online)
rc |= sclp_assign_storage(incr->rn);
- } else {
- if (--incr->usecount)
- continue;
+ else
sclp_unassign_storage(incr->rn);
- }
}
return rc ? -EIO : 0;
}
@@ -561,8 +549,6 @@ static void __init sclp_add_standby_memory(void)
add_memory_merged(0);
}
-#define MEM_SCT_SIZE (1UL << SECTION_SIZE_BITS)
-
static void __init insert_increment(u16 rn, int standby, int assigned)
{
struct memory_increment *incr, *new_incr;
@@ -574,8 +560,6 @@ static void __init insert_increment(u16 rn, int standby, int assigned)
return;
new_incr->rn = rn;
new_incr->standby = standby;
- if (!standby)
- new_incr->usecount = rzm > MEM_SCT_SIZE ? rzm/MEM_SCT_SIZE : 1;
last_rn = 0;
prev = &sclp_mem_list;
list_for_each_entry(incr, &sclp_mem_list, list) {
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 22820610022c..9e5e14686e75 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -426,7 +426,7 @@ static int zcore_memmap_open(struct inode *inode, struct file *filp)
GFP_KERNEL);
if (!chunk_array)
return -ENOMEM;
- detect_memory_layout(chunk_array);
+ detect_memory_layout(chunk_array, 0);
buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL);
if (!buf) {
kfree(chunk_array);
@@ -557,7 +557,7 @@ static void __init set_lc_mask(struct save_area *map)
/*
* Initialize dump globals for a given architecture
*/
-static int __init sys_info_init(enum arch_id arch)
+static int __init sys_info_init(enum arch_id arch, unsigned long mem_end)
{
int rc;
@@ -579,7 +579,7 @@ static int __init sys_info_init(enum arch_id arch)
rc = init_cpu_info(arch);
if (rc)
return rc;
- sys_info.mem_size = real_memory_size;
+ sys_info.mem_size = mem_end;
return 0;
}
@@ -601,7 +601,7 @@ static int __init check_sdias(void)
return 0;
}
-static int __init get_mem_size(unsigned long *mem)
+static int __init get_mem_info(unsigned long *mem, unsigned long *end)
{
int i;
struct mem_chunk *chunk_array;
@@ -610,33 +610,31 @@ static int __init get_mem_size(unsigned long *mem)
GFP_KERNEL);
if (!chunk_array)
return -ENOMEM;
- detect_memory_layout(chunk_array);
+ detect_memory_layout(chunk_array, 0);
for (i = 0; i < MEMORY_CHUNKS; i++) {
if (chunk_array[i].size == 0)
break;
*mem += chunk_array[i].size;
+ *end = max(*end, chunk_array[i].addr + chunk_array[i].size);
}
kfree(chunk_array);
return 0;
}
-static int __init zcore_header_init(int arch, struct zcore_header *hdr)
+static void __init zcore_header_init(int arch, struct zcore_header *hdr,
+ unsigned long mem_size)
{
- int rc, i;
- unsigned long memory = 0;
u32 prefix;
+ int i;
if (arch == ARCH_S390X)
hdr->arch_id = DUMP_ARCH_S390X;
else
hdr->arch_id = DUMP_ARCH_S390;
- rc = get_mem_size(&memory);
- if (rc)
- return rc;
- hdr->mem_size = memory;
- hdr->rmem_size = memory;
+ hdr->mem_size = mem_size;
+ hdr->rmem_size = mem_size;
hdr->mem_end = sys_info.mem_size;
- hdr->num_pages = memory / PAGE_SIZE;
+ hdr->num_pages = mem_size / PAGE_SIZE;
hdr->tod = get_tod_clock();
get_cpu_id(&hdr->cpu_id);
for (i = 0; zfcpdump_save_areas[i]; i++) {
@@ -647,7 +645,6 @@ static int __init zcore_header_init(int arch, struct zcore_header *hdr)
hdr->lc_vec[hdr->cpu_cnt] = prefix;
hdr->cpu_cnt++;
}
- return 0;
}
/*
@@ -682,9 +679,11 @@ static int __init zcore_reipl_init(void)
static int __init zcore_init(void)
{
+ unsigned long mem_size, mem_end;
unsigned char arch;
int rc;
+ mem_size = mem_end = 0;
if (ipl_info.type != IPL_TYPE_FCP_DUMP)
return -ENODATA;
if (OLDMEM_BASE)
@@ -727,13 +726,14 @@ static int __init zcore_init(void)
}
#endif /* CONFIG_64BIT */
- rc = sys_info_init(arch);
+ rc = get_mem_info(&mem_size, &mem_end);
if (rc)
goto fail;
- rc = zcore_header_init(arch, &zcore_header);
+ rc = sys_info_init(arch, mem_end);
if (rc)
goto fail;
+ zcore_header_init(arch, &zcore_header, mem_size);
rc = zcore_reipl_init();
if (rc)
diff --git a/drivers/s390/cio/blacklist.c b/drivers/s390/cio/blacklist.c
index 2d2a966a3b39..a9fe3de2dec1 100644
--- a/drivers/s390/cio/blacklist.c
+++ b/drivers/s390/cio/blacklist.c
@@ -1,7 +1,7 @@
/*
* S/390 common I/O routines -- blacklisting of specific devices
*
- * Copyright IBM Corp. 1999, 2002
+ * Copyright IBM Corp. 1999, 2013
* Author(s): Ingo Adlung (adlung@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
* Arnd Bergmann (arndb@de.ibm.com)
@@ -17,8 +17,9 @@
#include <linux/ctype.h>
#include <linux/device.h>
-#include <asm/cio.h>
#include <asm/uaccess.h>
+#include <asm/cio.h>
+#include <asm/ipl.h>
#include "blacklist.h"
#include "cio.h"
@@ -172,6 +173,29 @@ static int blacklist_parse_parameters(char *str, range_action action,
to_cssid = __MAX_CSSID;
to_ssid = __MAX_SSID;
to = __MAX_SUBCHANNEL;
+ } else if (strcmp(parm, "ipldev") == 0) {
+ if (ipl_info.type == IPL_TYPE_CCW) {
+ from_cssid = 0;
+ from_ssid = ipl_info.data.ccw.dev_id.ssid;
+ from = ipl_info.data.ccw.dev_id.devno;
+ } else if (ipl_info.type == IPL_TYPE_FCP ||
+ ipl_info.type == IPL_TYPE_FCP_DUMP) {
+ from_cssid = 0;
+ from_ssid = ipl_info.data.fcp.dev_id.ssid;
+ from = ipl_info.data.fcp.dev_id.devno;
+ } else {
+ continue;
+ }
+ to_cssid = from_cssid;
+ to_ssid = from_ssid;
+ to = from;
+ } else if (strcmp(parm, "condev") == 0) {
+ if (console_devno == -1)
+ continue;
+
+ from_cssid = to_cssid = 0;
+ from_ssid = to_ssid = 0;
+ from = to = console_devno;
} else {
rc = parse_busid(strsep(&parm, "-"), &from_cssid,
&from_ssid, &from, msgtrigger);
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index b8b340ac5332..9de41aa14896 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -954,15 +954,11 @@ EXPORT_SYMBOL(ap_driver_unregister);
void ap_bus_force_rescan(void)
{
- /* Delete the AP bus rescan timer. */
- del_timer(&ap_config_timer);
-
- /* processing a synchonuous bus rescan */
- ap_scan_bus(NULL);
-
- /* Setup the AP bus rescan timer again. */
- ap_config_timer.expires = jiffies + ap_config_time * HZ;
- add_timer(&ap_config_timer);
+ /* reconfigure the AP bus rescan timer. */
+ mod_timer(&ap_config_timer, jiffies + ap_config_time * HZ);
+ /* processing a asynchronous bus rescan */
+ queue_work(ap_work_queue, &ap_config_work);
+ flush_work(&ap_config_work);
}
EXPORT_SYMBOL(ap_bus_force_rescan);
@@ -1305,8 +1301,9 @@ static void ap_scan_bus(struct work_struct *unused)
int rc, i;
ap_query_configuration();
- if (ap_select_domain() != 0)
+ if (ap_select_domain() != 0) {
return;
+ }
for (i = 0; i < AP_DEVICES; i++) {
qid = AP_MKQID(i, ap_domain_index);
dev = bus_find_device(&ap_bus_type, NULL,