Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index b1aadc3..89fbfb3 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -2,7 +2,7 @@
/*
* S/390 debug facility
*
- * Copyright IBM Corp. 1999, 2012
+ * Copyright IBM Corp. 1999, 2020
*
* Author(s): Michael Holzheu (holzheu@de.ibm.com),
* Holger Smolinski (Holger.Smolinski@de.ibm.com)
@@ -24,6 +24,7 @@
#include <linux/export.h>
#include <linux/init.h>
#include <linux/fs.h>
+#include <linux/minmax.h>
#include <linux/debugfs.h>
#include <asm/debug.h>
@@ -90,27 +91,13 @@
size_t user_buf_size, loff_t *offset);
static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,
char *out_buf, const char *in_buf);
-static int debug_raw_format_fn(debug_info_t *id,
- struct debug_view *view, char *out_buf,
- const char *in_buf);
-static int debug_raw_header_fn(debug_info_t *id, struct debug_view *view,
- int area, debug_entry_t *entry, char *out_buf);
-
static int debug_sprintf_format_fn(debug_info_t *id, struct debug_view *view,
char *out_buf, debug_sprintf_entry_t *curr_event);
+static void debug_areas_swap(debug_info_t *a, debug_info_t *b);
+static void debug_events_append(debug_info_t *dest, debug_info_t *src);
/* globals */
-struct debug_view debug_raw_view = {
- "raw",
- NULL,
- &debug_raw_header_fn,
- &debug_raw_format_fn,
- NULL,
- NULL
-};
-EXPORT_SYMBOL(debug_raw_view);
-
struct debug_view debug_hex_ascii_view = {
"hex_ascii",
NULL,
@@ -414,7 +401,7 @@
act_entry = (debug_entry_t *) ((char *)id_snap->areas[p_info->act_area]
[p_info->act_page] + p_info->act_entry);
- if (act_entry->id.stck == 0LL)
+ if (act_entry->clock == 0LL)
goto out; /* empty entry */
if (view->header_proc)
len += view->header_proc(id_snap, view, p_info->act_area,
@@ -752,35 +739,28 @@
*/
static int debug_set_size(debug_info_t *id, int nr_areas, int pages_per_area)
{
- debug_entry_t ***new_areas;
+ debug_info_t *new_id;
unsigned long flags;
- int rc = 0;
if (!id || (nr_areas <= 0) || (pages_per_area < 0))
return -EINVAL;
- if (pages_per_area > 0) {
- new_areas = debug_areas_alloc(pages_per_area, nr_areas);
- if (!new_areas) {
- pr_info("Allocating memory for %i pages failed\n",
- pages_per_area);
- rc = -ENOMEM;
- goto out;
- }
- } else {
- new_areas = NULL;
+
+ new_id = debug_info_alloc("", pages_per_area, nr_areas, id->buf_size,
+ id->level, ALL_AREAS);
+ if (!new_id) {
+ pr_info("Allocating memory for %i pages failed\n",
+ pages_per_area);
+ return -ENOMEM;
}
+
spin_lock_irqsave(&id->lock, flags);
- debug_areas_free(id);
- id->areas = new_areas;
- id->nr_areas = nr_areas;
- id->pages_per_area = pages_per_area;
- id->active_area = 0;
- memset(id->active_entries, 0, sizeof(int)*id->nr_areas);
- memset(id->active_pages, 0, sizeof(int)*id->nr_areas);
+ debug_events_append(new_id, id);
+ debug_areas_swap(new_id, id);
+ debug_info_free(new_id);
spin_unlock_irqrestore(&id->lock, flags);
pr_info("%s: set new size (%i pages)\n", id->name, pages_per_area);
-out:
- return rc;
+
+ return 0;
}
/**
@@ -847,6 +827,42 @@
id->active_entries[id->active_area]);
}
+/* Swap debug areas of a and b. */
+static void debug_areas_swap(debug_info_t *a, debug_info_t *b)
+{
+ swap(a->nr_areas, b->nr_areas);
+ swap(a->pages_per_area, b->pages_per_area);
+ swap(a->areas, b->areas);
+ swap(a->active_area, b->active_area);
+ swap(a->active_pages, b->active_pages);
+ swap(a->active_entries, b->active_entries);
+}
+
+/* Append all debug events in active area from source to destination log. */
+static void debug_events_append(debug_info_t *dest, debug_info_t *src)
+{
+ debug_entry_t *from, *to, *last;
+
+ if (!src->areas || !dest->areas)
+ return;
+
+ /* Loop over all entries in src, starting with oldest. */
+ from = get_active_entry(src);
+ last = from;
+ do {
+ if (from->clock != 0LL) {
+ to = get_active_entry(dest);
+ memset(to, 0, dest->entry_size);
+ memcpy(to, from, min(src->entry_size,
+ dest->entry_size));
+ proceed_active_entry(dest);
+ }
+
+ proceed_active_entry(src);
+ from = get_active_entry(src);
+ } while (from != last);
+}
+
/*
* debug_finish_entry:
* - set timestamp, caller address, cpu number etc.
@@ -855,12 +871,17 @@
static inline void debug_finish_entry(debug_info_t *id, debug_entry_t *active,
int level, int exception)
{
- active->id.stck = get_tod_clock_fast() -
- *(unsigned long long *) &tod_clock_base[1];
- active->id.fields.cpuid = smp_processor_id();
+ unsigned char clk[STORE_CLOCK_EXT_SIZE];
+ unsigned long timestamp;
+
+ get_tod_clock_ext(clk);
+ timestamp = *(unsigned long *) &clk[0] >> 4;
+ timestamp -= TOD_UNIX_EPOCH >> 12;
+ active->clock = timestamp;
+ active->cpu = smp_processor_id();
active->caller = __builtin_return_address(0);
- active->id.fields.exception = exception;
- active->id.fields.level = level;
+ active->exception = exception;
+ active->level = level;
proceed_active_entry(id);
if (exception)
proceed_active_area(id);
@@ -878,7 +899,7 @@
* if debug_active is already off
*/
static int s390dbf_procactive(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+ void *buffer, size_t *lenp, loff_t *ppos)
{
if (!write || debug_stoppable || !debug_active)
return proc_dointvec(table, write, buffer, lenp, ppos);
@@ -1396,32 +1417,6 @@
}
/*
- * prints debug header in raw format
- */
-static int debug_raw_header_fn(debug_info_t *id, struct debug_view *view,
- int area, debug_entry_t *entry, char *out_buf)
-{
- int rc;
-
- rc = sizeof(debug_entry_t);
- memcpy(out_buf, entry, sizeof(debug_entry_t));
- return rc;
-}
-
-/*
- * prints debug data in raw format
- */
-static int debug_raw_format_fn(debug_info_t *id, struct debug_view *view,
- char *out_buf, const char *in_buf)
-{
- int rc;
-
- rc = id->buf_size;
- memcpy(out_buf, in_buf, id->buf_size);
- return rc;
-}
-
-/*
* prints debug data in hex/ascii format
*/
static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,
@@ -1450,25 +1445,24 @@
int debug_dflt_header_fn(debug_info_t *id, struct debug_view *view,
int area, debug_entry_t *entry, char *out_buf)
{
- unsigned long base, sec, usec;
+ unsigned long sec, usec;
unsigned long caller;
unsigned int level;
char *except_str;
int rc = 0;
- level = entry->id.fields.level;
- base = (*(unsigned long *) &tod_clock_base[0]) >> 4;
- sec = (entry->id.stck >> 12) + base - (TOD_UNIX_EPOCH >> 12);
+ level = entry->level;
+ sec = entry->clock;
usec = do_div(sec, USEC_PER_SEC);
- if (entry->id.fields.exception)
+ if (entry->exception)
except_str = "*";
else
except_str = "-";
caller = (unsigned long) entry->caller;
- rc += sprintf(out_buf, "%02i %011ld:%06lu %1u %1s %02i %pK ",
+ rc += sprintf(out_buf, "%02i %011ld:%06lu %1u %1s %04u %pK ",
area, sec, usec, level, except_str,
- entry->id.fields.cpuid, (void *)caller);
+ entry->cpu, (void *)caller);
return rc;
}
EXPORT_SYMBOL(debug_dflt_header_fn);