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

Pull more s390 updates from Martin Schwidefsky:

 - some cleanup for the hugetlbfs pte/pmd conversion functions

 - the code to check for the minimum CPU type is converted from
   assembler to C and an informational message is added in case the CPU
   is not new enough to run the kernel

 - bug fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/ftrace/jprobes: Fix conflict between jprobes and function graph tracing
  s390: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
  s390/zcrypt: fix possible memory leak in ap_module_init()
  s390/numa: only set possible nodes within node_possible_map
  s390/als: fix compile with gcov enabled
  s390/facilities: do not generate DWORDS define anymore
  s390/als: print missing facilities on facility mismatch
  s390/als: print machine type on facility mismatch
  s390/als: convert architecture level set code to C
  s390/sclp: move uninitialized data to data section
  s390/zcrypt: Fix zcrypt suspend/resume behavior
  s390/cio: fix premature wakeup during chp configure
  s390/cio: convert cfg_lock mutex to spinlock
  s390/mm: clean up pte/pmd encoding
This commit is contained in:
Linus Torvalds 2016-08-02 12:41:13 -04:00
parent 731c7d3a20 e64a5470dc
commit f7b32e4c02
20 changed files with 305 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/s390/boot/compressed/Makefile
View File

@ -18,7 +18,7 @@ KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
GCOV_PROFILE := n
OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o sclp.o ebcdic.o)
OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o sclp.o ebcdic.o als.o)
OBJECTS += $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o
LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T

1
arch/s390/include/asm/elf.h
View File

@ -225,6 +225,7 @@ do { \
#define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
#define STACK_RND_MASK MMAP_RND_MASK
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
if (vdso_enabled) \

20
arch/s390/include/asm/pgtable.h
View File

@ -242,8 +242,8 @@ static inline int is_module_addr(void *addr)
* swap .11..ttttt.0
* prot-none, clean, old .11.xx0000.1
* prot-none, clean, young .11.xx0001.1
* prot-none, dirty, old .10.xx0010.1
* prot-none, dirty, young .10.xx0011.1
* prot-none, dirty, old .11.xx0010.1
* prot-none, dirty, young .11.xx0011.1
* read-only, clean, old .11.xx0100.1
* read-only, clean, young .01.xx0101.1
* read-only, dirty, old .11.xx0110.1
@ -323,8 +323,8 @@ static inline int is_module_addr(void *addr)
#define _SEGMENT_ENTRY_DIRTY 0x2000 /* SW segment dirty bit */
#define _SEGMENT_ENTRY_YOUNG 0x1000 /* SW segment young bit */
#define _SEGMENT_ENTRY_LARGE 0x0400 /* STE-format control, large page */
#define _SEGMENT_ENTRY_READ 0x0002 /* SW segment read bit */
#define _SEGMENT_ENTRY_WRITE 0x0001 /* SW segment write bit */
#define _SEGMENT_ENTRY_WRITE 0x0002 /* SW segment write bit */
#define _SEGMENT_ENTRY_READ 0x0001 /* SW segment read bit */
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _SEGMENT_ENTRY_SOFT_DIRTY 0x4000 /* SW segment soft dirty bit */
@ -335,15 +335,15 @@ static inline int is_module_addr(void *addr)
/*
* Segment table and region3 table entry encoding
* (R = read-only, I = invalid, y = young bit):
* dy..R...I...rw
* dy..R...I...wr
* prot-none, clean, old 00..1...1...00
* prot-none, clean, young 01..1...1...00
* prot-none, dirty, old 10..1...1...00
* prot-none, dirty, young 11..1...1...00
* read-only, clean, old 00..1...1...10
* read-only, clean, young 01..1...0...10
* read-only, dirty, old 10..1...1...10
* read-only, dirty, young 11..1...0...10
* read-only, clean, old 00..1...1...01
* read-only, clean, young 01..1...0...01
* read-only, dirty, old 10..1...1...01
* read-only, dirty, young 11..1...0...01
* read-write, clean, old 00..1...1...11
* read-write, clean, young 01..1...0...11
* read-write, dirty, old 10..0...1...11
@ -382,7 +382,7 @@ static inline int is_module_addr(void *addr)
/*
* Page protection definitions.
*/
#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID)
#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID | _PAGE_PROTECT)
#define PAGE_READ __pgprot(_PAGE_PRESENT | _PAGE_READ | \
_PAGE_INVALID | _PAGE_PROTECT)
#define PAGE_WRITE __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \

2
arch/s390/include/uapi/asm/auxvec.h
View File

@ -3,4 +3,6 @@
#define AT_SYSINFO_EHDR 33
#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
#endif

11
arch/s390/kernel/Makefile
View File

@ -4,6 +4,7 @@
KCOV_INSTRUMENT_early.o := n
KCOV_INSTRUMENT_sclp.o := n
KCOV_INSTRUMENT_als.o := n
ifdef CONFIG_FUNCTION_TRACER
# Don't trace early setup code and tracing code
@ -32,21 +33,25 @@ CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
CFLAGS_sysinfo.o += -w
#
# Use -march=z900 for sclp.c to be able to print an error message if
# the kernel is started on a machine which is too old
# Use -march=z900 for sclp.c and als.c to be able to print an error
# message if the kernel is started on a machine which is too old
#
CFLAGS_REMOVE_sclp.o = $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_als.o = $(CC_FLAGS_FTRACE)
ifneq ($(CC_FLAGS_MARCH),-march=z900)
CFLAGS_REMOVE_sclp.o += $(CC_FLAGS_MARCH)
CFLAGS_sclp.o += -march=z900
CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
CFLAGS_als.o += -march=z900
AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
AFLAGS_head.o += -march=z900
endif
GCOV_PROFILE_sclp.o := n
GCOV_PROFILE_als.o := n
obj-y := traps.o time.o process.o base.o early.o setup.o idle.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 sclp.o vdso.o
obj-y += debug.o irq.o ipl.o dis.o diag.o sclp.o vdso.o als.o
obj-y += sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
obj-y += runtime_instr.o cache.o fpu.o dumpstack.o
obj-y += entry.o reipl.o relocate_kernel.o

124
arch/s390/kernel/als.c Normal file
View File

@ -0,0 +1,124 @@
/*
* Copyright IBM Corp. 2016
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/processor.h>
#include <asm/facility.h>
#include <asm/lowcore.h>
#include <asm/sclp.h>
#include "entry.h"
/*
* The code within this file will be called very early. It may _not_
* access anything within the bss section, since that is not cleared
* yet and may contain data (e.g. initrd) that must be saved by other
* code.
* For temporary objects the stack (16k) should be used.
*/
static unsigned long als[] __initdata = { FACILITIES_ALS };
static void __init u16_to_hex(char *str, u16 val)
{
int i, num;
for (i = 1; i <= 4; i++) {
num = (val >> (16 - 4 * i)) & 0xf;
if (num >= 10)
num += 7;
*str++ = '0' + num;
}
*str = '\0';
}
static void __init print_machine_type(void)
{
static char mach_str[80] __initdata = "Detected machine-type number: ";
char type_str[5];
struct cpuid id;
get_cpu_id(&id);
u16_to_hex(type_str, id.machine);
strcat(mach_str, type_str);
_sclp_print_early(mach_str);
}
static void __init u16_to_decimal(char *str, u16 val)
{
int div = 1;
while (div * 10 <= val)
div *= 10;
while (div) {
*str++ = '0' + val / div;
val %= div;
div /= 10;
}
*str = '\0';
}
static void __init print_missing_facilities(void)
{
static char als_str[80] __initdata = "Missing facilities: ";
unsigned long val;
char val_str[6];
int i, j, first;
first = 1;
for (i = 0; i < ARRAY_SIZE(als); i++) {
val = ~S390_lowcore.stfle_fac_list[i] & als[i];
for (j = 0; j < BITS_PER_LONG; j++) {
if (!(val & (1UL << (BITS_PER_LONG - 1 - j))))
continue;
if (!first)
strcat(als_str, ",");
/*
* Make sure we stay within one line. Consider that
* each facility bit adds up to five characters and
* z/VM adds a four character prefix.
*/
if (strlen(als_str) > 70) {
_sclp_print_early(als_str);
*als_str = '\0';
}
u16_to_decimal(val_str, i * BITS_PER_LONG + j);
strcat(als_str, val_str);
first = 0;
}
}
_sclp_print_early(als_str);
_sclp_print_early("See Principles of Operations for facility bits");
}
static void __init facility_mismatch(void)
{
_sclp_print_early("The Linux kernel requires more recent processor hardware");
print_machine_type();
print_missing_facilities();
disabled_wait(0x8badcccc);
}
void __init verify_facilities(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(S390_lowcore.stfle_fac_list); i++)
S390_lowcore.stfle_fac_list[i] = 0;
asm volatile(
" stfl 0(0)\n"
: "=m" (S390_lowcore.stfl_fac_list));
S390_lowcore.stfle_fac_list[0] = (u64)S390_lowcore.stfl_fac_list << 32;
if (S390_lowcore.stfl_fac_list & 0x01000000) {
register unsigned long reg0 asm("0") = ARRAY_SIZE(als) - 1;
asm volatile(".insn s,0xb2b00000,0(%1)" /* stfle */
: "+d" (reg0)
: "a" (&S390_lowcore.stfle_fac_list)
: "memory", "cc");
}
for (i = 0; i < ARRAY_SIZE(als); i++) {
if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i])
facility_mismatch();
}
}

2
arch/s390/kernel/entry.h
View File

@ -79,4 +79,6 @@ long sys_s390_pci_mmio_read(unsigned long, void __user *, size_t);
DECLARE_PER_CPU(u64, mt_cycles[8]);
void verify_facilities(void);
#endif /* _ENTRY_H */

43
arch/s390/kernel/head.S
View File

@ -306,49 +306,14 @@ ENTRY(startup_kdump)
stck __LC_LAST_UPDATE_CLOCK
spt 6f-.LPG0(%r13)
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
stfl 0(%r0) # store facilities @ __LC_STFL_FAC_LIST
mvc __LC_STFLE_FAC_LIST(4),__LC_STFL_FAC_LIST
tm __LC_STFLE_FAC_LIST,0x01 # stfle available ?
jz 0f
lghi %r0,FACILITIES_ALS_DWORDS-1
.insn s,0xb2b00000,__LC_STFLE_FAC_LIST # store facility list extended
# verify if all required facilities are supported by the machine
0: la %r1,__LC_STFLE_FAC_LIST
la %r2,3f+8-.LPG0(%r13)
lhi %r3,FACILITIES_ALS_DWORDS
1: lg %r0,0(%r1)
ng %r0,0(%r2)
clg %r0,0(%r2)
jne 2f
la %r1,8(%r1)
la %r2,8(%r2)
ahi %r3,-1
jnz 1b
j 4f
2: l %r15,.Lstack-.LPG0(%r13)
l %r15,.Lstack-.LPG0(%r13)
ahi %r15,-STACK_FRAME_OVERHEAD
la %r2,.Lals_string-.LPG0(%r13)
l %r3,.Lsclp_print-.LPG0(%r13)
basr %r14,%r3
lpsw 3f-.LPG0(%r13) # machine type not good enough, crash
.Lals_string:
.asciz "The Linux kernel requires more recent processor hardware"
.Lsclp_print:
.long _sclp_print_early
.Lstack:
.long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
.align 16
3: .long 0x000a0000,0x8badcccc
# List of facilities that are required. If not all facilities are present
# the kernel will crash.
.quad FACILITIES_ALS
4:
brasl %r14,verify_facilities
/* Continue with startup code in head64.S */
jg startup_continue
.Lstack:
.long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
.align 8
6: .long 0x7fffffff,0xffffffff

12
arch/s390/kernel/kprobes.c
View File

@ -690,6 +690,15 @@ int setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
stack = (unsigned long) regs->gprs[15];
memcpy(kcb->jprobes_stack, (void *) stack, MIN_STACK_SIZE(stack));
/*
* jprobes use jprobe_return() which skips the normal return
* path of the function, and this messes up the accounting of the
* function graph tracer to get messed up.
*
* Pause function graph tracing while performing the jprobe function.
*/
pause_graph_tracing();
return 1;
}
NOKPROBE_SYMBOL(setjmp_pre_handler);
@ -705,6 +714,9 @@ int longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long stack;
/* It's OK to start function graph tracing again */
unpause_graph_tracing();
stack = (unsigned long) kcb->jprobe_saved_regs.gprs[15];
/* Put the regs back */

5
arch/s390/kernel/sclp.c
View File

@ -12,8 +12,9 @@
#define EVTYP_VT220MSG_MASK 0x00000040
#define EVTYP_MSG_MASK 0x40000000
static char _sclp_work_area[4096] __aligned(PAGE_SIZE);
static bool have_vt220, have_linemode;
static char _sclp_work_area[4096] __aligned(PAGE_SIZE) __section(data);
static bool have_vt220 __section(data);
static bool have_linemode __section(data);
static void _sclp_wait_int(void)
{

52
arch/s390/mm/hugetlbpage.c
View File

@ -11,6 +11,12 @@
#include <linux/mm.h>
#include <linux/hugetlb.h>
/*
* If the bit selected by single-bit bitmask "a" is set within "x", move
* it to the position indicated by single-bit bitmask "b".
*/
#define move_set_bit(x, a, b) (((x) & (a)) >> ilog2(a) << ilog2(b))
static inline unsigned long __pte_to_rste(pte_t pte)
{
unsigned long rste;
@ -37,13 +43,22 @@ static inline unsigned long __pte_to_rste(pte_t pte)
*/
if (pte_present(pte)) {
rste = pte_val(pte) & PAGE_MASK;
rste |= (pte_val(pte) & _PAGE_READ) >> 4;
rste |= (pte_val(pte) & _PAGE_WRITE) >> 4;
rste |= (pte_val(pte) & _PAGE_INVALID) >> 5;
rste |= (pte_val(pte) & _PAGE_PROTECT);
rste |= (pte_val(pte) & _PAGE_DIRTY) << 10;
rste |= (pte_val(pte) & _PAGE_YOUNG) << 10;
rste |= (pte_val(pte) & _PAGE_SOFT_DIRTY) << 13;
rste |= move_set_bit(pte_val(pte), _PAGE_READ,
_SEGMENT_ENTRY_READ);
rste |= move_set_bit(pte_val(pte), _PAGE_WRITE,
_SEGMENT_ENTRY_WRITE);
rste |= move_set_bit(pte_val(pte), _PAGE_INVALID,
_SEGMENT_ENTRY_INVALID);
rste |= move_set_bit(pte_val(pte), _PAGE_PROTECT,
_SEGMENT_ENTRY_PROTECT);
rste |= move_set_bit(pte_val(pte), _PAGE_DIRTY,
_SEGMENT_ENTRY_DIRTY);
rste |= move_set_bit(pte_val(pte), _PAGE_YOUNG,
_SEGMENT_ENTRY_YOUNG);
#ifdef CONFIG_MEM_SOFT_DIRTY
rste |= move_set_bit(pte_val(pte), _PAGE_SOFT_DIRTY,
_SEGMENT_ENTRY_SOFT_DIRTY);
#endif
} else
rste = _SEGMENT_ENTRY_INVALID;
return rste;
@ -82,13 +97,22 @@ static inline pte_t __rste_to_pte(unsigned long rste)
if (present) {
pte_val(pte) = rste & _SEGMENT_ENTRY_ORIGIN_LARGE;
pte_val(pte) |= _PAGE_LARGE | _PAGE_PRESENT;
pte_val(pte) |= (rste & _SEGMENT_ENTRY_READ) << 4;
pte_val(pte) |= (rste & _SEGMENT_ENTRY_WRITE) << 4;
pte_val(pte) |= (rste & _SEGMENT_ENTRY_INVALID) << 5;
pte_val(pte) |= (rste & _SEGMENT_ENTRY_PROTECT);
pte_val(pte) |= (rste & _SEGMENT_ENTRY_DIRTY) >> 10;
pte_val(pte) |= (rste & _SEGMENT_ENTRY_YOUNG) >> 10;
pte_val(pte) |= (rste & _SEGMENT_ENTRY_SOFT_DIRTY) >> 13;
pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_READ,
_PAGE_READ);
pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_WRITE,
_PAGE_WRITE);
pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_INVALID,
_PAGE_INVALID);
pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_PROTECT,
_PAGE_PROTECT);
pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_DIRTY,
_PAGE_DIRTY);
pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_YOUNG,
_PAGE_YOUNG);
#ifdef CONFIG_MEM_SOFT_DIRTY
pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_SOFT_DIRTY,
_PAGE_DIRTY);
#endif
} else
pte_val(pte) = _PAGE_INVALID;
return pte;

4
arch/s390/numa/mode_emu.c
View File

@ -482,8 +482,12 @@ static int emu_setup_nodes_adjust(int nodes)
*/
static void emu_setup(void)
{
int nid;
emu_size = emu_setup_size_adjust(emu_size);
emu_nodes = emu_setup_nodes_adjust(emu_nodes);
for (nid = 0; nid < emu_nodes; nid++)
node_set(nid, node_possible_map);
pr_info("Creating %d nodes with memory stripe size %ld MB\n",
emu_nodes, emu_size >> 20);
}

8
arch/s390/numa/numa.c
View File

@ -26,8 +26,14 @@ EXPORT_SYMBOL(node_data);
cpumask_t node_to_cpumask_map[MAX_NUMNODES];
EXPORT_SYMBOL(node_to_cpumask_map);
static void plain_setup(void)
{
node_set(0, node_possible_map);
}
const struct numa_mode numa_mode_plain = {
.name = "plain",
.setup = plain_setup,
};
static const struct numa_mode *mode = &numa_mode_plain;
@ -126,13 +132,13 @@ static void __init numa_setup_memory(void)
void __init numa_setup(void)
{
pr_info("NUMA mode: %s\n", mode->name);
nodes_clear(node_possible_map);
if (mode->setup)
mode->setup();
numa_setup_memory();
memblock_dump_all();
}
/*
* numa_init_early() - Initialization initcall
*

1
arch/s390/tools/gen_facilities.c
View File

@ -39,7 +39,6 @@ static void print_facility_list(struct facility_def *def)
printf("#define %s ", def->name);
for (i = 0; i <= high; i++)
printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
printf("#define %s_DWORDS %d\n", def->name, high + 1);
free(array);
}

60
drivers/s390/cio/chp.c
View File

@ -37,8 +37,7 @@ enum cfg_task_t {
/* Map for pending configure tasks. */
static enum cfg_task_t chp_cfg_task[__MAX_CSSID + 1][__MAX_CHPID + 1];
static DEFINE_MUTEX(cfg_lock);
static int cfg_busy;
static DEFINE_SPINLOCK(cfg_lock);
/* Map for channel-path status. */
static struct sclp_chp_info chp_info;
@ -666,6 +665,20 @@ static void cfg_set_task(struct chp_id chpid, enum cfg_task_t cfg)
chp_cfg_task[chpid.cssid][chpid.id] = cfg;
}
/* Fetch the first configure task. Set chpid accordingly. */
static enum cfg_task_t chp_cfg_fetch_task(struct chp_id *chpid)
{
enum cfg_task_t t = cfg_none;
chp_id_for_each(chpid) {
t = cfg_get_task(*chpid);
if (t != cfg_none)
break;
}
return t;
}
/* Perform one configure/deconfigure request. Reschedule work function until
* last request. */
static void cfg_func(struct work_struct *work)
@ -674,16 +687,9 @@ static void cfg_func(struct work_struct *work)
enum cfg_task_t t;
int rc;
mutex_lock(&cfg_lock);
t = cfg_none;
chp_id_for_each(&chpid) {
t = cfg_get_task(chpid);
if (t != cfg_none) {
cfg_set_task(chpid, cfg_none);
break;
}
}
mutex_unlock(&cfg_lock);
spin_lock(&cfg_lock);
t = chp_cfg_fetch_task(&chpid);
spin_unlock(&cfg_lock);
switch (t) {
case cfg_configure:
@ -709,12 +715,13 @@ static void cfg_func(struct work_struct *work)
case cfg_none:
/* Get updated information after last change. */
info_update();
mutex_lock(&cfg_lock);
cfg_busy = 0;
mutex_unlock(&cfg_lock);
wake_up_interruptible(&cfg_wait_queue);
return;
}
spin_lock(&cfg_lock);
if (t == cfg_get_task(chpid))
cfg_set_task(chpid, cfg_none);
spin_unlock(&cfg_lock);
schedule_work(&cfg_work);
}
@ -729,10 +736,9 @@ void chp_cfg_schedule(struct chp_id chpid, int configure)
{
CIO_MSG_EVENT(2, "chp_cfg_sched%x.%02x=%d\n", chpid.cssid, chpid.id,
configure);
mutex_lock(&cfg_lock);
spin_lock(&cfg_lock);
cfg_set_task(chpid, configure ? cfg_configure : cfg_deconfigure);
cfg_busy = 1;
mutex_unlock(&cfg_lock);
spin_unlock(&cfg_lock);
schedule_work(&cfg_work);
}
@ -746,15 +752,27 @@ void chp_cfg_schedule(struct chp_id chpid, int configure)
void chp_cfg_cancel_deconfigure(struct chp_id chpid)
{
CIO_MSG_EVENT(2, "chp_cfg_cancel:%x.%02x\n", chpid.cssid, chpid.id);
mutex_lock(&cfg_lock);
spin_lock(&cfg_lock);
if (cfg_get_task(chpid) == cfg_deconfigure)
cfg_set_task(chpid, cfg_none);
mutex_unlock(&cfg_lock);
spin_unlock(&cfg_lock);
}
static bool cfg_idle(void)
{
struct chp_id chpid;
enum cfg_task_t t;
spin_lock(&cfg_lock);
t = chp_cfg_fetch_task(&chpid);
spin_unlock(&cfg_lock);
return t == cfg_none;
}
static int cfg_wait_idle(void)
{
if (wait_event_interruptible(cfg_wait_queue, !cfg_busy))
if (wait_event_interruptible(cfg_wait_queue, cfg_idle()))
return -ERESTARTSYS;
return 0;
}

50
drivers/s390/crypto/ap_bus.c
View File

@ -468,6 +468,8 @@ int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length)
{
struct ap_queue_status status;
if (msg == NULL)
return -EINVAL;
status = __ap_recv(qid, psmid, msg, length);
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
@ -617,6 +619,8 @@ static enum ap_wait ap_sm_read(struct ap_device *ap_dev)
{
struct ap_queue_status status;
if (!ap_dev->reply)
return AP_WAIT_NONE;
status = ap_sm_recv(ap_dev);
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
@ -637,6 +641,31 @@ static enum ap_wait ap_sm_read(struct ap_device *ap_dev)
}
}
/**
* ap_sm_suspend_read(): Receive pending reply messages from an AP device
* without changing the device state in between. In suspend mode we don't
* allow sending new requests, therefore just fetch pending replies.
* @ap_dev: pointer to the AP device
*
* Returns AP_WAIT_NONE or AP_WAIT_AGAIN
*/
static enum ap_wait ap_sm_suspend_read(struct ap_device *ap_dev)
{
struct ap_queue_status status;
if (!ap_dev->reply)
return AP_WAIT_NONE;
status = ap_sm_recv(ap_dev);
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
if (ap_dev->queue_count > 0)
return AP_WAIT_AGAIN;
/* fall through */
default:
return AP_WAIT_NONE;
}
}
/**
* ap_sm_write(): Send messages from the request queue to an AP device.
* @ap_dev: pointer to the AP device
@ -738,7 +767,7 @@ static enum ap_wait ap_sm_reset_wait(struct ap_device *ap_dev)
struct ap_queue_status status;
unsigned long info;
if (ap_dev->queue_count > 0)
if (ap_dev->queue_count > 0 && ap_dev->reply)
/* Try to read a completed message and get the status */
status = ap_sm_recv(ap_dev);
else
@ -778,7 +807,7 @@ static enum ap_wait ap_sm_setirq_wait(struct ap_device *ap_dev)
struct ap_queue_status status;
unsigned long info;
if (ap_dev->queue_count > 0)
if (ap_dev->queue_count > 0 && ap_dev->reply)
/* Try to read a completed message and get the status */
status = ap_sm_recv(ap_dev);
else
@ -834,7 +863,7 @@ static ap_func_t *ap_jumptable[NR_AP_STATES][NR_AP_EVENTS] = {
[AP_EVENT_TIMEOUT] = ap_sm_reset,
},
[AP_STATE_SUSPEND_WAIT] = {
[AP_EVENT_POLL] = ap_sm_read,
[AP_EVENT_POLL] = ap_sm_suspend_read,
[AP_EVENT_TIMEOUT] = ap_sm_nop,
},
[AP_STATE_BORKED] = {
@ -1335,6 +1364,17 @@ static struct bus_type ap_bus_type = {
.resume = ap_dev_resume,
};
void ap_device_init_reply(struct ap_device *ap_dev,
struct ap_message *reply)
{
ap_dev->reply = reply;
spin_lock_bh(&ap_dev->lock);
ap_sm_wait(ap_sm_event(ap_dev, AP_EVENT_POLL));
spin_unlock_bh(&ap_dev->lock);
}
EXPORT_SYMBOL(ap_device_init_reply);
static int ap_device_probe(struct device *dev)
{
struct ap_device *ap_dev = to_ap_dev(dev);
@ -1779,7 +1819,8 @@ int __init ap_module_init(void)
if (ap_domain_index < -1 || ap_domain_index > max_domain_id) {
pr_warn("%d is not a valid cryptographic domain\n",
ap_domain_index);
return -EINVAL;
rc = -EINVAL;
goto out_free;
}
/* In resume callback we need to know if the user had set the domain.
* If so, we can not just reset it.
@ -1852,6 +1893,7 @@ int __init ap_module_init(void)
unregister_reset_call(&ap_reset_call);
if (ap_using_interrupts())
unregister_adapter_interrupt(&ap_airq);
out_free:
kfree(ap_configuration);
return rc;
}

1
drivers/s390/crypto/ap_bus.h
View File

@ -262,6 +262,7 @@ void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
void ap_flush_queue(struct ap_device *ap_dev);
void ap_bus_force_rescan(void);
void ap_device_init_reply(struct ap_device *ap_dev, struct ap_message *ap_msg);
int ap_module_init(void);
void ap_module_exit(void);

2
drivers/s390/crypto/zcrypt_cex2a.c
View File

@ -126,7 +126,7 @@ static int zcrypt_cex2a_probe(struct ap_device *ap_dev)
MSGTYPE50_VARIANT_DEFAULT);
zdev->ap_dev = ap_dev;
zdev->online = 1;
ap_dev->reply = &zdev->reply;
ap_device_init_reply(ap_dev, &zdev->reply);
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);
if (rc) {

2
drivers/s390/crypto/zcrypt_cex4.c
View File

@ -147,7 +147,7 @@ static int zcrypt_cex4_probe(struct ap_device *ap_dev)
return -ENODEV;
zdev->ap_dev = ap_dev;
zdev->online = 1;
ap_dev->reply = &zdev->reply;
ap_device_init_reply(ap_dev, &zdev->reply);
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);
if (rc) {

2
drivers/s390/crypto/zcrypt_pcixcc.c
View File

@ -327,7 +327,7 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
else
zdev->ops = zcrypt_msgtype_request(MSGTYPE06_NAME,
MSGTYPE06_VARIANT_NORNG);
ap_dev->reply = &zdev->reply;
ap_device_init_reply(ap_dev, &zdev->reply);
ap_dev->private = zdev;
rc = zcrypt_device_register(zdev);
if (rc)