Merge tag 's390-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/s390/linux

Pull s390 updates from Martin Schwidefsky:

 - Improved access control for the zcrypt driver, multiple device nodes
   can now be created with different access control lists

 - Extend the pkey API to provide random protected keys, this is useful
   for encrypted swap device with ephemeral protected keys

 - Add support for virtually mapped kernel stacks

 - Rework the early boot code, this moves the memory detection into the
   boot code that runs prior to decompression.

 - Add KASAN support

 - Bug fixes and cleanups

* tag 's390-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (83 commits)
  s390/pkey: move pckmo subfunction available checks away from module init
  s390/kasan: support preemptible kernel build
  s390/pkey: Load pkey kernel module automatically
  s390/perf: Return error when debug_register fails
  s390/sthyi: Fix machine name validity indication
  s390/zcrypt: fix broken zcrypt_send_cprb in-kernel api function
  s390/vmalloc: fix VMALLOC_START calculation
  s390/mem_detect: add missing include
  s390/dumpstack: print psw mask and address again
  s390/crypto: Enhance paes cipher to accept variable length key material
  s390/pkey: Introduce new API for transforming key blobs
  s390/pkey: Introduce new API for random protected key verification
  s390/pkey: Add sysfs attributes to emit secure key blobs
  s390/pkey: Add sysfs attributes to emit protected key blobs
  s390/pkey: Define protected key blob format
  s390/pkey: Introduce new API for random protected key generation
  s390/zcrypt: add ap_adapter_mask sysfs attribute
  s390/zcrypt: provide apfs failure code on type 86 error reply
  s390/zcrypt: zcrypt device driver cleanup
  s390/kasan: add support for mem= kernel parameter
  ...

arch/s390/Kconfig

@@ -56,6 +56,12 @@ config PCI_QUIRKS
 config ARCH_SUPPORTS_UPROBES
 	def_bool y
 
+config KASAN_SHADOW_OFFSET
+	hex
+	depends on KASAN
+	default 0x18000000000000 if KASAN_S390_4_LEVEL_PAGING
+	default 0x30000000000
+
 config S390
 	def_bool y
 	select ARCH_BINFMT_ELF_STATE
@@ -120,11 +126,13 @@ config S390
 	select HAVE_ALIGNED_STRUCT_PAGE if SLUB
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_JUMP_LABEL
+	select HAVE_ARCH_KASAN
 	select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_SOFT_DIRTY
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+	select HAVE_ARCH_VMAP_STACK
 	select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
 	select HAVE_CMPXCHG_DOUBLE
 	select HAVE_CMPXCHG_LOCAL
@@ -649,6 +657,7 @@ config PACK_STACK
 
 config CHECK_STACK
 	def_bool y
+	depends on !VMAP_STACK
 	prompt "Detect kernel stack overflow"
 	help
 	  This option enables the compiler option -mstack-guard and

arch/s390/Makefile

@@ -27,7 +27,7 @@ KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding)
 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
 KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
 UTS_MACHINE	:= s390x
-STACK_SIZE	:= 16384
+STACK_SIZE	:= $(if $(CONFIG_KASAN),32768,16384)
 CHECKFLAGS	+= -D__s390__ -D__s390x__
 
 export LD_BFD

arch/s390/appldata/appldata_base.c

@@ -137,6 +137,14 @@ static void appldata_work_fn(struct work_struct *work)
 	mutex_unlock(&appldata_ops_mutex);
 }
 
+static struct appldata_product_id appldata_id = {
+	.prod_nr    = {0xD3, 0xC9, 0xD5, 0xE4,
+		       0xE7, 0xD2, 0xD9},	/* "LINUXKR" */
+	.prod_fn    = 0xD5D3,			/* "NL" */
+	.version_nr = 0xF2F6,			/* "26" */
+	.release_nr = 0xF0F1,			/* "01" */
+};
+
 /*
  * appldata_diag()
  *
@@ -145,17 +153,22 @@ static void appldata_work_fn(struct work_struct *work)
 int appldata_diag(char record_nr, u16 function, unsigned long buffer,
 			u16 length, char *mod_lvl)
 {
-	struct appldata_product_id id = {
-		.prod_nr    = {0xD3, 0xC9, 0xD5, 0xE4,
-			       0xE7, 0xD2, 0xD9},	/* "LINUXKR" */
-		.prod_fn    = 0xD5D3,			/* "NL" */
-		.version_nr = 0xF2F6,			/* "26" */
-		.release_nr = 0xF0F1,			/* "01" */
-	};
+	struct appldata_parameter_list *parm_list;
+	struct appldata_product_id *id;
+	int rc;
 
-	id.record_nr = record_nr;
-	id.mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1];
-	return appldata_asm(&id, function, (void *) buffer, length);
+	parm_list = kmalloc(sizeof(*parm_list), GFP_KERNEL);
+	id = kmemdup(&appldata_id, sizeof(appldata_id), GFP_KERNEL);
+	rc = -ENOMEM;
+	if (parm_list && id) {
+		id->record_nr = record_nr;
+		id->mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1];
+		rc = appldata_asm(parm_list, id, function,
+				  (void *) buffer, length);
+	}
+	kfree(id);
+	kfree(parm_list);
+	return rc;
 }
 /************************ timer, work, DIAG <END> ****************************/
 

arch/s390/boot/.gitignore

@@ -1,2 +1,3 @@
 image
 bzImage
+section_cmp.*

arch/s390/boot/Makefile

@@ -6,6 +6,7 @@
 KCOV_INSTRUMENT := n
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
 
 KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
 KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
@@ -27,15 +28,32 @@ endif
 
 CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
 
-obj-y	:= head.o als.o ebcdic.o sclp_early_core.o mem.o
-targets	:= bzImage startup.a $(obj-y)
+obj-y	:= head.o als.o startup.o mem_detect.o ipl_parm.o string.o ebcdic.o
+obj-y	+= sclp_early_core.o mem.o ipl_vmparm.o cmdline.o ctype.o
+targets	:= bzImage startup.a section_cmp.boot.data $(obj-y)
 subdir-	:= compressed
 
 OBJECTS := $(addprefix $(obj)/,$(obj-y))
 
-$(obj)/bzImage: $(obj)/compressed/vmlinux FORCE
+quiet_cmd_section_cmp = SECTCMP $*
+define cmd_section_cmp
+	s1=`$(OBJDUMP) -t -j "$*" "$<" | sort | \
+		sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
+	s2=`$(OBJDUMP) -t -j "$*" "$(word 2,$^)" | sort | \
+		sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
+	if [ "$$s1" != "$$s2" ]; then \
+		echo "error: section $* differs between $< and $(word 2,$^)" >&2; \
+		exit 1; \
+	fi; \
+	touch $@
+endef
+
+$(obj)/bzImage: $(obj)/compressed/vmlinux $(obj)/section_cmp.boot.data FORCE
 	$(call if_changed,objcopy)
 
+$(obj)/section_cmp%: vmlinux $(obj)/compressed/vmlinux FORCE
+	$(call if_changed,section_cmp)
+
 $(obj)/compressed/vmlinux: $(obj)/startup.a FORCE
 	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
 

arch/s390/boot/boot.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BOOT_BOOT_H
+#define BOOT_BOOT_H
+
+void startup_kernel(void);
+void detect_memory(void);
+void store_ipl_parmblock(void);
+void setup_boot_command_line(void);
+void setup_memory_end(void);
+
+#endif /* BOOT_BOOT_H */

arch/s390/boot/cmdline.c

@@ -0,0 +1,2 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "../../../lib/cmdline.c"

arch/s390/boot/compressed/Makefile

@@ -8,38 +8,33 @@
 KCOV_INSTRUMENT := n
 GCOV_PROFILE := n
 UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
 
-obj-y	:= $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.o
+obj-y	:= $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) piggy.o info.o
 targets	:= vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
 targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
-targets += vmlinux.scr.lds $(obj-y) $(if $(CONFIG_KERNEL_UNCOMPRESSED),,sizes.h)
+targets += info.bin $(obj-y)
 
 KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
 KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
+OBJCOPYFLAGS :=
 
 OBJECTS := $(addprefix $(obj)/,$(obj-y))
 
 LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
 $(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS)
 	$(call if_changed,ld)
 
-# extract required uncompressed vmlinux symbols and adjust them to reflect offsets inside vmlinux.bin
-sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - 0x100000)/p'
-
-quiet_cmd_sizes = GEN     $@
-      cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
-
-$(obj)/sizes.h: vmlinux
-	$(call if_changed,sizes)
-
-AFLAGS_head.o += -I$(objtree)/$(obj)
-$(obj)/head.o: $(obj)/sizes.h
+OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info
+$(obj)/info.bin: vmlinux FORCE
+	$(call if_changed,objcopy)
 
-CFLAGS_misc.o += -I$(objtree)/$(obj)
-$(obj)/misc.o: $(obj)/sizes.h
+OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info
+$(obj)/info.o: $(obj)/info.bin FORCE
+	$(call if_changed,objcopy)
 
-OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
-$(obj)/vmlinux.bin: vmlinux
+OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S
+$(obj)/vmlinux.bin: vmlinux FORCE
 	$(call if_changed,objcopy)
 
 vmlinux.bin.all-y := $(obj)/vmlinux.bin
@@ -64,10 +59,10 @@ $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)
 $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y)
 	$(call if_changed,xzkern)
 
-LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
-$(obj)/piggy.o: $(obj)/vmlinux.scr.lds $(obj)/vmlinux.bin$(suffix-y)
-	$(call if_changed,ld)
+OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed
+$(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE
+	$(call if_changed,objcopy)
 
-chkbss := $(filter-out $(obj)/misc.o $(obj)/piggy.o,$(OBJECTS))
+chkbss := $(filter-out $(obj)/piggy.o $(obj)/info.o,$(OBJECTS))
 chkbss-target := $(obj)/vmlinux.bin
 include $(srctree)/arch/s390/scripts/Makefile.chkbss

arch/s390/boot/compressed/decompressor.c

@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Definitions and wrapper functions for kernel decompressor
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Author(s): Martin Schwidefsky <[email protected]>
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <asm/page.h>
+#include "decompressor.h"
+
+/*
+ * gzip declarations
+ */
+#define STATIC static
+#define STATIC_RW_DATA static __section(.data)
+
+#undef memset
+#undef memcpy
+#undef memmove
+#define memmove memmove
+#define memzero(s, n) memset((s), 0, (n))
+
+/* Symbols defined by linker scripts */
+extern char _end[];
+extern unsigned char _compressed_start[];
+extern unsigned char _compressed_end[];
+
+#ifdef CONFIG_HAVE_KERNEL_BZIP2
+#define HEAP_SIZE	0x400000
+#else
+#define HEAP_SIZE	0x10000
+#endif
+
+static unsigned long free_mem_ptr = (unsigned long) _end;
+static unsigned long free_mem_end_ptr = (unsigned long) _end + HEAP_SIZE;
+
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
+#define decompress_offset ALIGN((unsigned long)_end + HEAP_SIZE, PAGE_SIZE)
+
+unsigned long mem_safe_offset(void)
+{
+	/*
+	 * due to 4MB HEAD_SIZE for bzip2
+	 * 'decompress_offset + vmlinux.image_size' could be larger than
+	 * kernel at final position + its .bss, so take the larger of two
+	 */
+	return max(decompress_offset + vmlinux.image_size,
+		   vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size);
+}
+
+void *decompress_kernel(void)
+{
+	void *output = (void *)decompress_offset;
+
+	__decompress(_compressed_start, _compressed_end - _compressed_start,
+		     NULL, NULL, output, 0, NULL, error);
+	return output;
+}

arch/s390/boot/compressed/decompressor.h

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef BOOT_COMPRESSED_DECOMPRESSOR_H
+#define BOOT_COMPRESSED_DECOMPRESSOR_H
+
+#ifdef CONFIG_KERNEL_UNCOMPRESSED
+static inline void *decompress_kernel(void) {}
+#else
+void *decompress_kernel(void);
+#endif
+unsigned long mem_safe_offset(void);
+void error(char *m);
+
+struct vmlinux_info {
+	unsigned long default_lma;
+	void (*entry)(void);
+	unsigned long image_size;	/* does not include .bss */
+	unsigned long bss_size;		/* uncompressed image .bss size */
+	unsigned long bootdata_off;
+	unsigned long bootdata_size;
+};
+
+extern char _vmlinux_info[];
+#define vmlinux (*(struct vmlinux_info *)_vmlinux_info)
+
+#endif /* BOOT_COMPRESSED_DECOMPRESSOR_H */