Commit 990f2273 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 's390-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Heiko Carstens:

 - Allow s390 debug feature to handle finally more than 256 CPU numbers,
   instead of truncating the most significant bits.

 - Improve THP splitting required by qemu processes by making use of
   walk_page_vma() instead of calling follow_page() for every single
   page within each vma.

 - Add missing ZCRYPT dependency to VFIO_AP to fix potential compile
   problems.

 - Remove not required select CLOCKSOURCE_VALIDATE_LAST_CYCLE again.

 - Set node distance to LOCAL_DISTANCE instead of 0, since e.g. libnuma
   translates a node distance of 0 to "no NUMA support available".

 - Couple of other minor fixes and improvements.

* tag 's390-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/numa: move code to arch/s390/kernel
  s390/time: remove select CLOCKSOURCE_VALIDATE_LAST_CYCLE again
  s390/debug: debug feature version 3
  s390/Kconfig: add missing ZCRYPT dependency to VFIO_AP
  s390/numa: set node distance to LOCAL_DISTANCE
  s390/pkey: remove redundant variable initialization
  s390/test_unwind: fix possible memleak in test_unwind()
  s390/gmap: improve THP splitting
  s390/atomic: circumvent gcc 10 build regression
parents 23c2c8c6 b450eeb0
......@@ -7,5 +7,4 @@ obj-$(CONFIG_S390_HYPFS_FS) += hypfs/
obj-$(CONFIG_APPLDATA_BASE) += appldata/
obj-y += net/
obj-$(CONFIG_PCI) += pci/
obj-$(CONFIG_NUMA) += numa/
obj-$(CONFIG_ARCH_HAS_KEXEC_PURGATORY) += purgatory/
......@@ -126,7 +126,6 @@ config S390
select HAVE_ARCH_JUMP_LABEL_RELATIVE
select HAVE_ARCH_KASAN
select HAVE_ARCH_KASAN_VMALLOC
select CLOCKSOURCE_VALIDATE_LAST_CYCLE
select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_SOFT_DIRTY
......@@ -766,6 +765,7 @@ config VFIO_AP
def_tristate n
prompt "VFIO support for AP devices"
depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM
depends on ZCRYPT
help
This driver grants access to Adjunct Processor (AP) devices
via the VFIO mediated device interface.
......
......@@ -45,7 +45,11 @@ static inline int atomic_fetch_add(int i, atomic_t *v)
static inline void atomic_add(int i, atomic_t *v)
{
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
if (__builtin_constant_p(i) && (i > -129) && (i < 128)) {
/*
* Order of conditions is important to circumvent gcc 10 bug:
* https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549318.html
*/
if ((i > -129) && (i < 128) && __builtin_constant_p(i)) {
__atomic_add_const(i, &v->counter);
return;
}
......@@ -112,7 +116,11 @@ static inline s64 atomic64_fetch_add(s64 i, atomic64_t *v)
static inline void atomic64_add(s64 i, atomic64_t *v)
{
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
if (__builtin_constant_p(i) && (i > -129) && (i < 128)) {
/*
* Order of conditions is important to circumvent gcc 10 bug:
* https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549318.html
*/
if ((i > -129) && (i < 128) && __builtin_constant_p(i)) {
__atomic64_add_const(i, (long *)&v->counter);
return;
}
......
......@@ -2,7 +2,7 @@
/*
* S/390 debug facility
*
* Copyright IBM Corp. 1999, 2000
* Copyright IBM Corp. 1999, 2020
*/
#ifndef DEBUG_H
#define DEBUG_H
......@@ -26,19 +26,14 @@
#define DEBUG_DATA(entry) (char *)(entry + 1) /* data is stored behind */
/* the entry information */
#define __DEBUG_FEATURE_VERSION 2 /* version of debug feature */
#define __DEBUG_FEATURE_VERSION 3 /* version of debug feature */
struct __debug_entry {
union {
struct {
unsigned long clock : 52;
unsigned long clock : 60;
unsigned long exception : 1;
unsigned long level : 3;
unsigned long cpuid : 8;
} fields;
unsigned long stck;
} id;
void *caller;
unsigned short cpu;
} __packed;
typedef struct __debug_entry debug_entry_t;
......
......@@ -86,12 +86,6 @@ static inline const struct cpumask *cpumask_of_node(int node)
#define pcibus_to_node(bus) __pcibus_to_node(bus)
#define node_distance(a, b) __node_distance(a, b)
static inline int __node_distance(int a, int b)
{
return 0;
}
#else /* !CONFIG_NUMA */
#define numa_node_id numa_node_id
......
......@@ -49,6 +49,7 @@ CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE)
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_SCHED_TOPOLOGY) += topology.o
obj-$(CONFIG_NUMA) += numa.o
obj-$(CONFIG_AUDIT) += audit.o
compat-obj-$(CONFIG_AUDIT) += compat_audit.o
obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o
......
......@@ -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)
......@@ -433,7 +433,7 @@ static int debug_format_entry(file_private_info_t *p_info)
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,
......@@ -829,12 +829,17 @@ static inline debug_entry_t *get_active_entry(debug_info_t *id)
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);
......@@ -1398,25 +1403,24 @@ static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,
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);
......
......@@ -64,6 +64,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs,
break;
if (state.reliable && !addr) {
pr_err("unwind state reliable but addr is 0\n");
kfree(bt);
return -EINVAL;
}
sprint_symbol(sym, addr);
......
......@@ -2485,23 +2485,36 @@ void gmap_sync_dirty_log_pmd(struct gmap *gmap, unsigned long bitmap[4],
}
EXPORT_SYMBOL_GPL(gmap_sync_dirty_log_pmd);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static int thp_split_walk_pmd_entry(pmd_t *pmd, unsigned long addr,
unsigned long end, struct mm_walk *walk)
{
struct vm_area_struct *vma = walk->vma;
split_huge_pmd(vma, pmd, addr);
return 0;
}
static const struct mm_walk_ops thp_split_walk_ops = {
.pmd_entry = thp_split_walk_pmd_entry,
};
static inline void thp_split_mm(struct mm_struct *mm)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
struct vm_area_struct *vma;
unsigned long addr;
for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) {
for (addr = vma->vm_start;
addr < vma->vm_end;
addr += PAGE_SIZE)
follow_page(vma, addr, FOLL_SPLIT);
vma->vm_flags &= ~VM_HUGEPAGE;
vma->vm_flags |= VM_NOHUGEPAGE;
walk_page_vma(vma, &thp_split_walk_ops, NULL);
}
mm->def_flags |= VM_NOHUGEPAGE;
#endif
}
#else
static inline void thp_split_mm(struct mm_struct *mm)
{
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
/*
* Remove all empty zero pages from the mapping for lazy refaulting
......
# SPDX-License-Identifier: GPL-2.0
obj-y += numa.o
......@@ -818,7 +818,7 @@ static int pkey_keyblob2pkey2(const struct pkey_apqn *apqns, size_t nr_apqns,
static int pkey_apqns4key(const u8 *key, size_t keylen, u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns)
{
int rc = EINVAL;
int rc;
u32 _nr_apqns, *_apqns = NULL;
struct keytoken_header *hdr = (struct keytoken_header *)key;
......@@ -886,7 +886,7 @@ static int pkey_apqns4keytype(enum pkey_key_type ktype,
u8 cur_mkvp[32], u8 alt_mkvp[32], u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns)
{
int rc = -EINVAL;
int rc;
u32 _nr_apqns, *_apqns = NULL;
if (ktype == PKEY_TYPE_CCA_DATA || ktype == PKEY_TYPE_CCA_CIPHER) {
......
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