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-rw-r--r--arch/s390/kernel/dumpstack.c2
-rw-r--r--arch/s390/kernel/entry.S2
-rw-r--r--arch/s390/kernel/entry.h1
-rw-r--r--arch/s390/kernel/mcount.S15
-rw-r--r--arch/s390/kernel/perf_cpum_sf.c67
-rw-r--r--arch/s390/kernel/pgm_check.S2
-rw-r--r--arch/s390/kernel/setup.c16
-rw-r--r--arch/s390/kernel/syscalls/syscall.tbl2
-rw-r--r--arch/s390/kernel/traps.c41
9 files changed, 97 insertions, 51 deletions
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c
index d306fe04489a..2c122d8bab93 100644
--- a/arch/s390/kernel/dumpstack.c
+++ b/arch/s390/kernel/dumpstack.c
@@ -195,6 +195,8 @@ void die(struct pt_regs *regs, const char *str)
regs->int_code >> 17, ++die_counter);
#ifdef CONFIG_PREEMPT
pr_cont("PREEMPT ");
+#elif defined(CONFIG_PREEMPT_RT)
+ pr_cont("PREEMPT_RT ");
#endif
pr_cont("SMP ");
if (debug_pagealloc_enabled())
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 270d1d145761..9205add8481d 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -790,7 +790,7 @@ ENTRY(io_int_handler)
.Lio_work:
tm __PT_PSW+1(%r11),0x01 # returning to user ?
jo .Lio_work_user # yes -> do resched & signal
-#ifdef CONFIG_PREEMPT
+#ifdef CONFIG_PREEMPTION
# check for preemptive scheduling
icm %r0,15,__LC_PREEMPT_COUNT
jnz .Lio_restore # preemption is disabled
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index b2956d49b6ad..1d3927e01a5f 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -45,6 +45,7 @@ void specification_exception(struct pt_regs *regs);
void transaction_exception(struct pt_regs *regs);
void translation_exception(struct pt_regs *regs);
void vector_exception(struct pt_regs *regs);
+void monitor_event_exception(struct pt_regs *regs);
void do_per_trap(struct pt_regs *regs);
void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str);
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index c3597d2e2ae0..f942341429b1 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -26,6 +26,12 @@ ENDPROC(ftrace_stub)
#define STACK_PTREGS (STACK_FRAME_OVERHEAD)
#define STACK_PTREGS_GPRS (STACK_PTREGS + __PT_GPRS)
#define STACK_PTREGS_PSW (STACK_PTREGS + __PT_PSW)
+#ifdef __PACK_STACK
+/* allocate just enough for r14, r15 and backchain */
+#define TRACED_FUNC_FRAME_SIZE 24
+#else
+#define TRACED_FUNC_FRAME_SIZE STACK_FRAME_OVERHEAD
+#endif
ENTRY(_mcount)
BR_EX %r14
@@ -40,9 +46,16 @@ ENTRY(ftrace_caller)
#if !(defined(CC_USING_HOTPATCH) || defined(CC_USING_NOP_MCOUNT))
aghi %r0,MCOUNT_RETURN_FIXUP
#endif
- aghi %r15,-STACK_FRAME_SIZE
+ # allocate stack frame for ftrace_caller to contain traced function
+ aghi %r15,-TRACED_FUNC_FRAME_SIZE
stg %r1,__SF_BACKCHAIN(%r15)
+ stg %r0,(__SF_GPRS+8*8)(%r15)
+ stg %r15,(__SF_GPRS+9*8)(%r15)
+ # allocate pt_regs and stack frame for ftrace_trace_function
+ aghi %r15,-STACK_FRAME_SIZE
stg %r1,(STACK_PTREGS_GPRS+15*8)(%r15)
+ aghi %r1,-TRACED_FUNC_FRAME_SIZE
+ stg %r1,__SF_BACKCHAIN(%r15)
stg %r0,(STACK_PTREGS_PSW+8)(%r15)
stmg %r2,%r14,(STACK_PTREGS_GPRS+2*8)(%r15)
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 77d93c534284..b095b1c78987 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -1383,7 +1383,8 @@ static void aux_output_end(struct perf_output_handle *handle)
te = aux_sdb_trailer(aux, aux->alert_mark);
te->flags &= ~SDB_TE_ALERT_REQ_MASK;
- debug_sprintf_event(sfdbg, 6, "%s: collect %#lx SDBs\n", __func__, i);
+ debug_sprintf_event(sfdbg, 6, "%s: SDBs %ld range %ld head %ld\n",
+ __func__, i, range_scan, aux->head);
}
/*
@@ -1416,13 +1417,17 @@ static int aux_output_begin(struct perf_output_handle *handle,
* SDBs between aux->head and aux->empty_mark are already ready
* for new data. range_scan is num of SDBs not within them.
*/
+ debug_sprintf_event(sfdbg, 6,
+ "%s: range %ld head %ld alert %ld empty %ld\n",
+ __func__, range, aux->head, aux->alert_mark,
+ aux->empty_mark);
if (range > AUX_SDB_NUM_EMPTY(aux)) {
range_scan = range - AUX_SDB_NUM_EMPTY(aux);
idx = aux->empty_mark + 1;
for (i = 0; i < range_scan; i++, idx++) {
te = aux_sdb_trailer(aux, idx);
- te->flags = te->flags & ~SDB_TE_BUFFER_FULL_MASK;
- te->flags = te->flags & ~SDB_TE_ALERT_REQ_MASK;
+ te->flags &= ~(SDB_TE_BUFFER_FULL_MASK |
+ SDB_TE_ALERT_REQ_MASK);
te->overflow = 0;
}
/* Save the position of empty SDBs */
@@ -1441,15 +1446,11 @@ static int aux_output_begin(struct perf_output_handle *handle,
cpuhw->lsctl.tear = base + offset * sizeof(unsigned long);
cpuhw->lsctl.dear = aux->sdb_index[head];
- debug_sprintf_event(sfdbg, 6, "%s: "
- "head->alert_mark->empty_mark (num_alert, range)"
- "[%#lx -> %#lx -> %#lx] (%#lx, %#lx) "
- "tear index %#lx, tear %#lx dear %#lx\n", __func__,
+ debug_sprintf_event(sfdbg, 6, "%s: head %ld alert %ld empty %ld "
+ "index %ld tear %#lx dear %#lx\n", __func__,
aux->head, aux->alert_mark, aux->empty_mark,
- AUX_SDB_NUM_ALERT(aux), range,
head / CPUM_SF_SDB_PER_TABLE,
- cpuhw->lsctl.tear,
- cpuhw->lsctl.dear);
+ cpuhw->lsctl.tear, cpuhw->lsctl.dear);
return 0;
}
@@ -1469,8 +1470,7 @@ static bool aux_set_alert(struct aux_buffer *aux, unsigned long alert_index,
te = aux_sdb_trailer(aux, alert_index);
do {
orig_flags = te->flags;
- orig_overflow = te->overflow;
- *overflow = orig_overflow;
+ *overflow = orig_overflow = te->overflow;
if (orig_flags & SDB_TE_BUFFER_FULL_MASK) {
/*
* SDB is already set by hardware.
@@ -1512,9 +1512,12 @@ static bool aux_reset_buffer(struct aux_buffer *aux, unsigned long range,
unsigned long long *overflow)
{
unsigned long long orig_overflow, orig_flags, new_flags;
- unsigned long i, range_scan, idx;
+ unsigned long i, range_scan, idx, idx_old;
struct hws_trailer_entry *te;
+ debug_sprintf_event(sfdbg, 6, "%s: range %ld head %ld alert %ld "
+ "empty %ld\n", __func__, range, aux->head,
+ aux->alert_mark, aux->empty_mark);
if (range <= AUX_SDB_NUM_EMPTY(aux))
/*
* No need to scan. All SDBs in range are marked as empty.
@@ -1537,7 +1540,7 @@ static bool aux_reset_buffer(struct aux_buffer *aux, unsigned long range,
* indicator fall into this range, set it.
*/
range_scan = range - AUX_SDB_NUM_EMPTY(aux);
- idx = aux->empty_mark + 1;
+ idx_old = idx = aux->empty_mark + 1;
for (i = 0; i < range_scan; i++, idx++) {
te = aux_sdb_trailer(aux, idx);
do {
@@ -1557,6 +1560,9 @@ static bool aux_reset_buffer(struct aux_buffer *aux, unsigned long range,
/* Update empty_mark to new position */
aux->empty_mark = aux->head + range - 1;
+ debug_sprintf_event(sfdbg, 6, "%s: range_scan %ld idx %ld..%ld "
+ "empty %ld\n", __func__, range_scan, idx_old,
+ idx - 1, aux->empty_mark);
return true;
}
@@ -1570,7 +1576,6 @@ static void hw_collect_aux(struct cpu_hw_sf *cpuhw)
unsigned long range = 0, size;
unsigned long long overflow = 0;
struct perf_output_handle *handle = &cpuhw->handle;
- unsigned long num_sdb;
aux = perf_get_aux(handle);
if (WARN_ON_ONCE(!aux))
@@ -1578,8 +1583,9 @@ static void hw_collect_aux(struct cpu_hw_sf *cpuhw)
/* Inform user space new data arrived */
size = AUX_SDB_NUM_ALERT(aux) << PAGE_SHIFT;
+ debug_sprintf_event(sfdbg, 6, "%s: #alert %ld\n", __func__,
+ size >> PAGE_SHIFT);
perf_aux_output_end(handle, size);
- num_sdb = aux->sfb.num_sdb;
while (!done) {
/* Get an output handle */
@@ -1587,7 +1593,7 @@ static void hw_collect_aux(struct cpu_hw_sf *cpuhw)
if (handle->size == 0) {
pr_err("The AUX buffer with %lu pages for the "
"diagnostic-sampling mode is full\n",
- num_sdb);
+ aux->sfb.num_sdb);
debug_sprintf_event(sfdbg, 1,
"%s: AUX buffer used up\n",
__func__);
@@ -1612,14 +1618,14 @@ static void hw_collect_aux(struct cpu_hw_sf *cpuhw)
size = range << PAGE_SHIFT;
perf_aux_output_end(&cpuhw->handle, size);
pr_err("Sample data caused the AUX buffer with %lu "
- "pages to overflow\n", num_sdb);
- debug_sprintf_event(sfdbg, 1, "%s: head %#lx range %#lx "
- "overflow %#llx\n", __func__,
+ "pages to overflow\n", aux->sfb.num_sdb);
+ debug_sprintf_event(sfdbg, 1, "%s: head %ld range %ld "
+ "overflow %lld\n", __func__,
aux->head, range, overflow);
} else {
size = AUX_SDB_NUM_ALERT(aux) << PAGE_SHIFT;
perf_aux_output_end(&cpuhw->handle, size);
- debug_sprintf_event(sfdbg, 6, "%s: head %#lx alert %#lx "
+ debug_sprintf_event(sfdbg, 6, "%s: head %ld alert %ld "
"already full, try another\n",
__func__,
aux->head, aux->alert_mark);
@@ -1627,11 +1633,9 @@ static void hw_collect_aux(struct cpu_hw_sf *cpuhw)
}
if (done)
- debug_sprintf_event(sfdbg, 6, "%s: aux_reset_buffer "
- "[%#lx -> %#lx -> %#lx] (%#lx, %#lx)\n",
- __func__, aux->head, aux->alert_mark,
- aux->empty_mark, AUX_SDB_NUM_ALERT(aux),
- range);
+ debug_sprintf_event(sfdbg, 6, "%s: head %ld alert %ld "
+ "empty %ld\n", __func__, aux->head,
+ aux->alert_mark, aux->empty_mark);
}
/*
@@ -1654,8 +1658,7 @@ static void aux_buffer_free(void *data)
kfree(aux->sdb_index);
kfree(aux);
- debug_sprintf_event(sfdbg, 4, "%s: free "
- "%lu SDBTs\n", __func__, num_sdbt);
+ debug_sprintf_event(sfdbg, 4, "%s: SDBTs %lu\n", __func__, num_sdbt);
}
static void aux_sdb_init(unsigned long sdb)
@@ -1707,13 +1710,13 @@ static void *aux_buffer_setup(struct perf_event *event, void **pages,
}
/* Allocate aux_buffer struct for the event */
- aux = kmalloc(sizeof(struct aux_buffer), GFP_KERNEL);
+ aux = kzalloc(sizeof(struct aux_buffer), GFP_KERNEL);
if (!aux)
goto no_aux;
sfb = &aux->sfb;
/* Allocate sdbt_index for fast reference */
- n_sdbt = (nr_pages + CPUM_SF_SDB_PER_TABLE - 1) / CPUM_SF_SDB_PER_TABLE;
+ n_sdbt = DIV_ROUND_UP(nr_pages, CPUM_SF_SDB_PER_TABLE);
aux->sdbt_index = kmalloc_array(n_sdbt, sizeof(void *), GFP_KERNEL);
if (!aux->sdbt_index)
goto no_sdbt_index;
@@ -1763,8 +1766,8 @@ static void *aux_buffer_setup(struct perf_event *event, void **pages,
*/
aux->empty_mark = sfb->num_sdb - 1;
- debug_sprintf_event(sfdbg, 4, "%s: setup %lu SDBTs and %lu SDBs\n",
- __func__, sfb->num_sdbt, sfb->num_sdb);
+ debug_sprintf_event(sfdbg, 4, "%s: SDBTs %lu SDBs %lu\n", __func__,
+ sfb->num_sdbt, sfb->num_sdb);
return aux;
diff --git a/arch/s390/kernel/pgm_check.S b/arch/s390/kernel/pgm_check.S
index 59dee9d3bebf..eee3a482195a 100644
--- a/arch/s390/kernel/pgm_check.S
+++ b/arch/s390/kernel/pgm_check.S
@@ -81,7 +81,7 @@ PGM_CHECK_DEFAULT /* 3c */
PGM_CHECK_DEFAULT /* 3d */
PGM_CHECK_DEFAULT /* 3e */
PGM_CHECK_DEFAULT /* 3f */
-PGM_CHECK_DEFAULT /* 40 */
+PGM_CHECK(monitor_event_exception) /* 40 */
PGM_CHECK_DEFAULT /* 41 */
PGM_CHECK_DEFAULT /* 42 */
PGM_CHECK_DEFAULT /* 43 */
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index d5fbd754f41a..b2c2f75860e8 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -111,6 +111,8 @@ unsigned long __bootdata_preserved(__etext_dma);
unsigned long __bootdata_preserved(__sdma);
unsigned long __bootdata_preserved(__edma);
unsigned long __bootdata_preserved(__kaslr_offset);
+unsigned int __bootdata_preserved(zlib_dfltcc_support);
+EXPORT_SYMBOL(zlib_dfltcc_support);
unsigned long VMALLOC_START;
EXPORT_SYMBOL(VMALLOC_START);
@@ -241,8 +243,6 @@ static void __init conmode_default(void)
SET_CONSOLE_SCLP;
#endif
}
- if (IS_ENABLED(CONFIG_VT) && IS_ENABLED(CONFIG_DUMMY_CONSOLE))
- conswitchp = &dummy_con;
}
#ifdef CONFIG_CRASH_DUMP
@@ -761,14 +761,6 @@ static void __init free_mem_detect_info(void)
memblock_free(start, size);
}
-static void __init memblock_physmem_add(phys_addr_t start, phys_addr_t size)
-{
- memblock_dbg("memblock_physmem_add: [%#016llx-%#016llx]\n",
- start, start + size - 1);
- memblock_add_range(&memblock.memory, start, size, 0, 0);
- memblock_add_range(&memblock.physmem, start, size, 0, 0);
-}
-
static const char * __init get_mem_info_source(void)
{
switch (mem_detect.info_source) {
@@ -793,8 +785,10 @@ static void __init memblock_add_mem_detect_info(void)
get_mem_info_source(), mem_detect.info_source);
/* keep memblock lists close to the kernel */
memblock_set_bottom_up(true);
- for_each_mem_detect_block(i, &start, &end)
+ for_each_mem_detect_block(i, &start, &end) {
+ memblock_add(start, end - start);
memblock_physmem_add(start, end - start);
+ }
memblock_set_bottom_up(false);
memblock_dump_all();
}
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index 3054e9c035a3..bd7bd3581a0f 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -438,3 +438,5 @@
433 common fspick sys_fspick sys_fspick
434 common pidfd_open sys_pidfd_open sys_pidfd_open
435 common clone3 sys_clone3 sys_clone3
+437 common openat2 sys_openat2 sys_openat2
+438 common pidfd_getfd sys_pidfd_getfd sys_pidfd_getfd
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 164c0282b41a..dc75588d7894 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -53,11 +53,6 @@ void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
if (fixup)
regs->psw.addr = extable_fixup(fixup);
else {
- enum bug_trap_type btt;
-
- btt = report_bug(regs->psw.addr, regs);
- if (btt == BUG_TRAP_TYPE_WARN)
- return;
die(regs, str);
}
}
@@ -245,6 +240,27 @@ void space_switch_exception(struct pt_regs *regs)
do_trap(regs, SIGILL, ILL_PRVOPC, "space switch event");
}
+void monitor_event_exception(struct pt_regs *regs)
+{
+ const struct exception_table_entry *fixup;
+
+ if (user_mode(regs))
+ return;
+
+ switch (report_bug(regs->psw.addr - (regs->int_code >> 16), regs)) {
+ case BUG_TRAP_TYPE_NONE:
+ fixup = s390_search_extables(regs->psw.addr);
+ if (fixup)
+ regs->psw.addr = extable_fixup(fixup);
+ break;
+ case BUG_TRAP_TYPE_WARN:
+ break;
+ case BUG_TRAP_TYPE_BUG:
+ die(regs, "monitor event");
+ break;
+ }
+}
+
void kernel_stack_overflow(struct pt_regs *regs)
{
bust_spinlocks(1);
@@ -255,8 +271,23 @@ void kernel_stack_overflow(struct pt_regs *regs)
}
NOKPROBE_SYMBOL(kernel_stack_overflow);
+static void test_monitor_call(void)
+{
+ int val = 1;
+
+ asm volatile(
+ " mc 0,0\n"
+ "0: xgr %0,%0\n"
+ "1:\n"
+ EX_TABLE(0b,1b)
+ : "+d" (val));
+ if (!val)
+ panic("Monitor call doesn't work!\n");
+}
+
void __init trap_init(void)
{
sort_extable(__start_dma_ex_table, __stop_dma_ex_table);
local_mcck_enable();
+ test_monitor_call();
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.