Merge tag 's390-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik:

 - Add support for stackleak feature. Also allow specifying
   architecture-specific stackleak poison function to enable faster
   implementation. On s390, the mvc-based implementation helps decrease
   typical overhead from a factor of 3 to just 25%

 - Convert all assembler files to use SYM* style macros, deprecating the
   ENTRY() macro and other annotations. Select ARCH_USE_SYM_ANNOTATIONS

 - Improve KASLR to also randomize module and special amode31 code base
   load addresses

 - Rework decompressor memory tracking to support memory holes and
   improve error handling

 - Add support for protected virtualization AP binding

 - Add support for set_direct_map() calls

 - Implement set_memory_rox() and noexec module_alloc()

 - Remove obsolete overriding of mem*() functions for KASAN

 - Rework kexec/kdump to avoid using nodat_stack to call purgatory

 - Convert the rest of the s390 code to use flexible-array member
   instead of a zero-length array

 - Clean up uaccess inline asm

 - Enable ARCH_HAS_MEMBARRIER_SYNC_CORE

 - Convert to using CONFIG_FUNCTION_ALIGNMENT and enable
   DEBUG_FORCE_FUNCTION_ALIGN_64B

 - Resolve last_break in userspace fault reports

 - Simplify one-level sysctl registration

 - Clean up branch prediction handling

 - Rework CPU counter facility to retrieve available counter sets just
   once

 - Other various small fixes and improvements all over the code

* tag 's390-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (118 commits)
  s390/stackleak: provide fast __stackleak_poison() implementation
  stackleak: allow to specify arch specific stackleak poison function
  s390: select ARCH_USE_SYM_ANNOTATIONS
  s390/mm: use VM_FLUSH_RESET_PERMS in module_alloc()
  s390: wire up memfd_secret system call
  s390/mm: enable ARCH_HAS_SET_DIRECT_MAP
  s390/mm: use BIT macro to generate SET_MEMORY bit masks
  s390/relocate_kernel: adjust indentation
  s390/relocate_kernel: use SYM* macros instead of ENTRY(), etc.
  s390/entry: use SYM* macros instead of ENTRY(), etc.
  s390/purgatory: use SYM* macros instead of ENTRY(), etc.
  s390/kprobes: use SYM* macros instead of ENTRY(), etc.
  s390/reipl: use SYM* macros instead of ENTRY(), etc.
  s390/head64: use SYM* macros instead of ENTRY(), etc.
  s390/earlypgm: use SYM* macros instead of ENTRY(), etc.
  s390/mcount: use SYM* macros instead of ENTRY(), etc.
  s390/crc32le: use SYM* macros instead of ENTRY(), etc.
  s390/crc32be: use SYM* macros instead of ENTRY(), etc.
  s390/crypto,chacha: use SYM* macros instead of ENTRY(), etc.
  s390/amode31: use SYM* macros instead of ENTRY(), etc.
  ...

1 files changed, 20 insertions, 15 deletions

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 4113a7ffa149..5b22c6e24528 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -5,6 +5,7 @@
 
 #include <linux/memory_hotplug.h>
 #include <linux/memblock.h>
+#include <linux/kasan.h>
 #include <linux/pfn.h>
 #include <linux/mm.h>
 #include <linux/init.h>
@@ -664,6 +665,9 @@ static void __init memblock_region_swap(void *a, void *b, int size)
 	swap(*(struct memblock_region *)a, *(struct memblock_region *)b);
 }
 
+#ifdef CONFIG_KASAN
+#define __sha(x)	((unsigned long)kasan_mem_to_shadow((void *)x))
+#endif
 /*
  * map whole physical memory to virtual memory (identity mapping)
  * we reserve enough space in the vmalloc area for vmemmap to hotplug
@@ -728,23 +732,24 @@ void __init vmem_map_init(void)
 	     memblock_region_cmp, memblock_region_swap);
 	__for_each_mem_range(i, &memblock.memory, &memory_rwx,
 			     NUMA_NO_NODE, MEMBLOCK_NONE, &base, &end, NULL) {
-		__set_memory((unsigned long)__va(base),
-			     (end - base) >> PAGE_SHIFT,
-			     SET_MEMORY_RW | SET_MEMORY_NX);
+		set_memory_rwnx((unsigned long)__va(base),
+				(end - base) >> PAGE_SHIFT);
 	}
 
-	__set_memory((unsigned long)_stext,
-		     (unsigned long)(_etext - _stext) >> PAGE_SHIFT,
-		     SET_MEMORY_RO | SET_MEMORY_X);
-	__set_memory((unsigned long)_etext,
-		     (unsigned long)(__end_rodata - _etext) >> PAGE_SHIFT,
-		     SET_MEMORY_RO);
-	__set_memory((unsigned long)_sinittext,
-		     (unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT,
-		     SET_MEMORY_RO | SET_MEMORY_X);
-	__set_memory(__stext_amode31,
-		     (__etext_amode31 - __stext_amode31) >> PAGE_SHIFT,
-		     SET_MEMORY_RO | SET_MEMORY_X);
+#ifdef CONFIG_KASAN
+	for_each_mem_range(i, &base, &end) {
+		set_memory_rwnx(__sha(base),
+				(__sha(end) - __sha(base)) >> PAGE_SHIFT);
+	}
+#endif
+	set_memory_rox((unsigned long)_stext,
+		       (unsigned long)(_etext - _stext) >> PAGE_SHIFT);
+	set_memory_ro((unsigned long)_etext,
+		      (unsigned long)(__end_rodata - _etext) >> PAGE_SHIFT);
+	set_memory_rox((unsigned long)_sinittext,
+		       (unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT);
+	set_memory_rox(__stext_amode31,
+		       (__etext_amode31 - __stext_amode31) >> PAGE_SHIFT);
 
 	/* lowcore must be executable for LPSWE */
 	if (static_key_enabled(&cpu_has_bear))