diff options
Diffstat (limited to 'arch')
67 files changed, 1483 insertions, 574 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 4fe5b2affa23..515240576930 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -145,6 +145,7 @@ config S390 select HAVE_KERNEL_LZ4 select HAVE_KERNEL_LZMA select HAVE_KERNEL_LZO + select HAVE_KERNEL_UNCOMPRESSED select HAVE_KERNEL_XZ select HAVE_KPROBES select HAVE_KRETPROBES diff --git a/arch/s390/Makefile b/arch/s390/Makefile index 68a690442be0..eee6703093c3 100644 --- a/arch/s390/Makefile +++ b/arch/s390/Makefile @@ -14,8 +14,18 @@ LD_BFD := elf64-s390 LDFLAGS := -m elf64_s390 KBUILD_AFLAGS_MODULE += -fPIC KBUILD_CFLAGS_MODULE += -fPIC -KBUILD_CFLAGS += -m64 KBUILD_AFLAGS += -m64 +KBUILD_CFLAGS += -m64 +aflags_dwarf := -Wa,-gdwarf-2 +KBUILD_AFLAGS_DECOMPRESSOR := -m64 -D__ASSEMBLY__ +KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf)) +KBUILD_CFLAGS_DECOMPRESSOR := -m64 -O2 +KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY +KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float +KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables +KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding) +KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g) +KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,)) UTS_MACHINE := s390x STACK_SIZE := 16384 CHECKFLAGS += -D__s390__ -D__s390x__ @@ -52,18 +62,14 @@ cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include # cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls -# old style option for packed stacks -ifeq ($(call cc-option-yn,-mkernel-backchain),y) -cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK -aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK -endif - -# new style option for packed stacks ifeq ($(call cc-option-yn,-mpacked-stack),y) cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK endif +KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y) +KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y) + ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y) cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE) ifneq ($(call cc-option-yn,-mstack-size=8192),y) @@ -71,8 +77,11 @@ cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) endif endif -ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) -cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack +ifdef CONFIG_WARN_DYNAMIC_STACK + ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y) + KBUILD_CFLAGS += -mwarn-dynamicstack + KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack + endif endif ifdef CONFIG_EXPOLINE @@ -82,6 +91,7 @@ ifdef CONFIG_EXPOLINE CC_FLAGS_EXPOLINE += -mindirect-branch-table export CC_FLAGS_EXPOLINE cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE + aflags-y += -DCC_USING_EXPOLINE endif endif @@ -102,11 +112,12 @@ KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y) KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi) KBUILD_AFLAGS += $(aflags-y) $(cfi) +export KBUILD_AFLAGS_DECOMPRESSOR +export KBUILD_CFLAGS_DECOMPRESSOR OBJCOPYFLAGS := -O binary -head-y := arch/s390/kernel/head.o -head-y += arch/s390/kernel/head64.o +head-y := arch/s390/kernel/head64.o # See arch/s390/Kbuild for content of core part of the kernel core-y += arch/s390/ @@ -121,7 +132,7 @@ boot := arch/s390/boot syscalls := arch/s390/kernel/syscalls tools := arch/s390/tools -all: image bzImage +all: bzImage #KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg... KBUILD_IMAGE := $(boot)/bzImage @@ -129,7 +140,7 @@ KBUILD_IMAGE := $(boot)/bzImage install: vmlinux $(Q)$(MAKE) $(build)=$(boot) $@ -image bzImage: vmlinux +bzImage: vmlinux $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ zfcpdump: @@ -152,8 +163,7 @@ archprepare: # Don't use tabs in echo arguments define archhelp - echo '* image - Kernel image for IPL ($(boot)/image)' - echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)' + echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)' echo ' install - Install kernel using' echo ' (your) ~/bin/$(INSTALLKERNEL) or' echo ' (distribution) /sbin/$(INSTALLKERNEL) or' diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c index ee6a9c387c87..9bf8489df6e6 100644 --- a/arch/s390/appldata/appldata_base.c +++ b/arch/s390/appldata/appldata_base.c @@ -206,35 +206,28 @@ static int appldata_timer_handler(struct ctl_table *ctl, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { - unsigned int len; - char buf[2]; + int timer_active = appldata_timer_active; + int zero = 0; + int one = 1; + int rc; + struct ctl_table ctl_entry = { + .procname = ctl->procname, + .data = &timer_active, + .maxlen = sizeof(int), + .extra1 = &zero, + .extra2 = &one, + }; + + rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos); + if (rc < 0 || !write) + return rc; - if (!*lenp || *ppos) { - *lenp = 0; - return 0; - } - if (!write) { - strncpy(buf, appldata_timer_active ? "1\n" : "0\n", - ARRAY_SIZE(buf)); - len = strnlen(buf, ARRAY_SIZE(buf)); - if (len > *lenp) - len = *lenp; - if (copy_to_user(buffer, buf, len)) - return -EFAULT; - goto out; - } - len = *lenp; - if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len)) - return -EFAULT; spin_lock(&appldata_timer_lock); - if (buf[0] == '1') + if (timer_active) __appldata_vtimer_setup(APPLDATA_ADD_TIMER); - else if (buf[0] == '0') + else __appldata_vtimer_setup(APPLDATA_DEL_TIMER); spin_unlock(&appldata_timer_lock); -out: - *lenp = len; - *ppos += len; return 0; } @@ -248,37 +241,24 @@ static int appldata_interval_handler(struct ctl_table *ctl, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { - unsigned int len; - int interval; - char buf[16]; + int interval = appldata_interval; + int one = 1; + int rc; + struct ctl_table ctl_entry = { + .procname = ctl->procname, + .data = &interval, + .maxlen = sizeof(int), + .extra1 = &one, + }; - if (!*lenp || *ppos) { - *lenp = 0; - return 0; - } - if (!write) { - len = sprintf(buf, "%i\n", appldata_interval); - if (len > *lenp) - len = *lenp; - if (copy_to_user(buffer, buf, len)) - return -EFAULT; - goto out; - } - len = *lenp; - if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len)) - return -EFAULT; - interval = 0; - sscanf(buf, "%i", &interval); - if (interval <= 0) - return -EINVAL; + rc = proc_dointvec_minmax(&ctl_entry, write, buffer, lenp, ppos); + if (rc < 0 || !write) + return rc; spin_lock(&appldata_timer_lock); appldata_interval = interval; __appldata_vtimer_setup(APPLDATA_MOD_TIMER); spin_unlock(&appldata_timer_lock); -out: - *lenp = len; - *ppos += len; return 0; } @@ -293,10 +273,17 @@ appldata_generic_handler(struct ctl_table *ctl, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { struct appldata_ops *ops = NULL, *tmp_ops; - unsigned int len; - int rc, found; - char buf[2]; struct list_head *lh; + int rc, found; + int active; + int zero = 0; + int one = 1; + struct ctl_table ctl_entry = { + .data = &active, + .maxlen = sizeof(int), + .extra1 = &zero, + .extra2 = &one, + }; found = 0; mutex_lock(&appldata_ops_mutex); @@ -317,31 +304,15 @@ appldata_generic_handler(struct ctl_table *ctl, int write, } mutex_unlock(&appldata_ops_mutex); - if (!*lenp || *ppos) { - *lenp = 0; + active = ops->active; + rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos); + if (rc < 0 || !write) { module_put(ops->owner); - return 0; - } - if (!write) { - strncpy(buf, ops->active ? "1\n" : "0\n", ARRAY_SIZE(buf)); - len = strnlen(buf, ARRAY_SIZE(buf)); - if (len > *lenp) - len = *lenp; - if (copy_to_user(buffer, buf, len)) { - module_put(ops->owner); - return -EFAULT; - } - goto out; - } - len = *lenp; - if (copy_from_user(buf, buffer, - len > sizeof(buf) ? sizeof(buf) : len)) { - module_put(ops->owner); - return -EFAULT; + return rc; } mutex_lock(&appldata_ops_mutex); - if ((buf[0] == '1') && (ops->active == 0)) { + if (active && (ops->active == 0)) { // protect work queue callback if (!try_module_get(ops->owner)) { mutex_unlock(&appldata_ops_mutex); @@ -359,7 +330,7 @@ appldata_generic_handler(struct ctl_table *ctl, int write, module_put(ops->owner); } else ops->active = 1; - } else if ((buf[0] == '0') && (ops->active == 1)) { + } else if (!active && (ops->active == 1)) { ops->active = 0; rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC, (unsigned long) ops->data, ops->size, @@ -370,9 +341,6 @@ appldata_generic_handler(struct ctl_table *ctl, int write, module_put(ops->owner); } mutex_unlock(&appldata_ops_mutex); -out: - *lenp = len; - *ppos += len; module_put(ops->owner); return 0; } diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile index d1fa37fcce83..9e6668ee93de 100644 --- a/arch/s390/boot/Makefile +++ b/arch/s390/boot/Makefile @@ -3,19 +3,52 @@ # Makefile for the linux s390-specific parts of the memory manager. # -targets := image -targets += bzImage -subdir- := compressed +KCOV_INSTRUMENT := n +GCOV_PROFILE := n +UBSAN_SANITIZE := n -$(obj)/image: vmlinux FORCE - $(call if_changed,objcopy) +KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR) +KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR) + +# +# Use -march=z900 for als.c to be able to print an error +# message if the kernel is started on a machine which is too old +# +ifneq ($(CC_FLAGS_MARCH),-march=z900) +AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH) +AFLAGS_head.o += -march=z900 +AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH) +AFLAGS_mem.o += -march=z900 +CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH) +CFLAGS_als.o += -march=z900 +CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH) +CFLAGS_sclp_early_core.o += -march=z900 +endif + +CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char + +obj-y := head.o als.o ebcdic.o sclp_early_core.o mem.o +targets := bzImage startup.a $(obj-y) +subdir- := compressed + +OBJECTS := $(addprefix $(obj)/,$(obj-y)) $(obj)/bzImage: $(obj)/compressed/vmlinux FORCE $(call if_changed,objcopy) -$(obj)/compressed/vmlinux: FORCE +$(obj)/compressed/vmlinux: $(obj)/startup.a FORCE $(Q)$(MAKE) $(build)=$(obj)/compressed $@ +quiet_cmd_ar = AR $@ + cmd_ar = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(filter $(OBJECTS), $^) + +$(obj)/startup.a: $(OBJECTS) FORCE + $(call if_changed,ar) + install: $(CONFIGURE) $(obj)/bzImage sh -x $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \ System.map "$(INSTALL_PATH)" + +chkbss := $(OBJECTS) +chkbss-target := $(obj)/startup.a +include $(srctree)/arch/s390/scripts/Makefile.chkbss diff --git a/arch/s390/kernel/als.c b/arch/s390/boot/als.c index d1892bf36cab..d592e0d90d9f 100644 --- a/arch/s390/kernel/als.c +++ b/arch/s390/boot/als.c @@ -3,12 +3,10 @@ * Copyright IBM Corp. 2016 */ #include <linux/kernel.h> -#include <linux/init.h> #include <asm/processor.h> #include <asm/facility.h> #include <asm/lowcore.h> #include <asm/sclp.h> -#include "entry.h" /* * The code within this file will be called very early. It may _not_ @@ -18,9 +16,9 @@ * For temporary objects the stack (16k) should be used. */ -static unsigned long als[] __initdata = { FACILITIES_ALS }; +static unsigned long als[] = { FACILITIES_ALS }; -static void __init u16_to_hex(char *str, u16 val) +static void u16_to_hex(char *str, u16 val) { int i, num; @@ -33,9 +31,9 @@ static void __init u16_to_hex(char *str, u16 val) *str = '\0'; } -static void __init print_machine_type(void) +static void print_machine_type(void) { - static char mach_str[80] __initdata = "Detected machine-type number: "; + static char mach_str[80] = "Detected machine-type number: "; char type_str[5]; struct cpuid id; @@ -46,7 +44,7 @@ static void __init print_machine_type(void) sclp_early_printk(mach_str); } -static void __init u16_to_decimal(char *str, u16 val) +static void u16_to_decimal(char *str, u16 val) { int div = 1; @@ -60,9 +58,9 @@ static void __init u16_to_decimal(char *str, u16 val) *str = '\0'; } -static void __init print_missing_facilities(void) +static void print_missing_facilities(void) { - static char als_str[80] __initdata = "Missing facilities: "; + static char als_str[80] = "Missing facilities: "; unsigned long val; char val_str[6]; int i, j, first; @@ -95,7 +93,7 @@ static void __init print_missing_facilities(void) sclp_early_printk("See Principles of Operations for facility bits\n"); } -static void __init facility_mismatch(void) +static void facility_mismatch(void) { sclp_early_printk("The Linux kernel requires more recent processor hardware\n"); print_machine_type(); @@ -103,7 +101,7 @@ static void __init facility_mismatch(void) disabled_wait(0x8badcccc); } -void __init verify_facilities(void) +void verify_facilities(void) { int i; diff --git a/arch/s390/boot/compressed/.gitignore b/arch/s390/boot/compressed/.gitignore index 2088cc140629..45aeb4f08752 100644 --- a/arch/s390/boot/compressed/.gitignore +++ b/arch/s390/boot/compressed/.gitignore @@ -1,4 +1,5 @@ sizes.h vmlinux vmlinux.lds +vmlinux.scr.lds vmlinux.bin.full diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile index 5766f7b9b271..04609478d18b 100644 --- a/arch/s390/boot/compressed/Makefile +++ b/arch/s390/boot/compressed/Makefile @@ -6,39 +6,29 @@ # KCOV_INSTRUMENT := n +GCOV_PROFILE := n +UBSAN_SANITIZE := n +obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.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 += misc.o piggy.o sizes.h head.o - -KBUILD_CFLAGS := -m64 -D__KERNEL__ -O2 -KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY -KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -msoft-float -KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -KBUILD_CFLAGS += $(call cc-option,-mpacked-stack) -KBUILD_CFLAGS += $(call cc-option,-ffreestanding) +targets += vmlinux.scr.lds $(obj-y) $(if $(CONFIG_KERNEL_UNCOMPRESSED),,sizes.h) -GCOV_PROFILE := n -UBSAN_SANITIZE := n +KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR) +KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR) -OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o ebcdic.o als.o) -OBJECTS += $(objtree)/drivers/s390/char/sclp_early_core.o -OBJECTS += $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o +OBJECTS := $(addprefix $(obj)/,$(obj-y)) LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T -$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS) +$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS) $(call if_changed,ld) -TRIM_HEAD_SIZE := 0x11000 - -sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - $(TRIM_HEAD_SIZE))/p' +# extract required uncompressed vmlinux symbols and adjust them to reflect offsets inside vmlinux.bin +sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - 0x100000)/p' quiet_cmd_sizes = GEN $@ cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@ -quiet_cmd_trim_head = TRIM $@ - cmd_trim_head = tail -c +$$(($(TRIM_HEAD_SIZE) + 1)) $< > $@ - $(obj)/sizes.h: vmlinux $(call if_changed,sizes) @@ -48,21 +38,18 @@ $(obj)/head.o: $(obj)/sizes.h CFLAGS_misc.o += -I$(objtree)/$(obj) $(obj)/misc.o: $(obj)/sizes.h -OBJCOPYFLAGS_vmlinux.bin.full := -R .comment -S -$(obj)/vmlinux.bin.full: vmlinux +OBJCOPYFLAGS_vmlinux.bin := -R .comment -S +$(obj)/vmlinux.bin: vmlinux $(call if_changed,objcopy) -$(obj)/vmlinux.bin: $(obj)/vmlinux.bin.full - $(call if_changed,trim_head) - vmlinux.bin.all-y := $(obj)/vmlinux.bin -suffix-$(CONFIG_KERNEL_GZIP) := gz -suffix-$(CONFIG_KERNEL_BZIP2) := bz2 -suffix-$(CONFIG_KERNEL_LZ4) := lz4 -suffix-$(CONFIG_KERNEL_LZMA) := lzma -suffix-$(CONFIG_KERNEL_LZO) := lzo -suffix-$(CONFIG_KERNEL_XZ) := xz +suffix-$(CONFIG_KERNEL_GZIP) := .gz +suffix-$(CONFIG_KERNEL_BZIP2) := .bz2 +suffix-$(CONFIG_KERNEL_LZ4) := .lz4 +suffix-$(CONFIG_KERNEL_LZMA) := .lzma +suffix-$(CONFIG_KERNEL_LZO) := .lzo +suffix-$(CONFIG_KERNEL_XZ) := .xz $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) $(call if_changed,gzip) @@ -78,5 +65,9 @@ $(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 $(obj)/vmlinux.bin.$(suffix-y) +$(obj)/piggy.o: $(obj)/vmlinux.scr.lds $(obj)/vmlinux.bin$(suffix-y) $(call if_changed,ld) + +chkbss := $(filter-out $(obj)/misc.o $(obj)/piggy.o,$(OBJECTS)) +chkbss-target := $(obj)/vmlinux.bin +include $(srctree)/arch/s390/scripts/Makefile.chkbss diff --git a/arch/s390/boot/compressed/head.S b/arch/s390/boot/compressed/head.S index 9f94eca0f467..df8dbbc17bcc 100644 --- a/arch/s390/boot/compressed/head.S +++ b/arch/s390/boot/compressed/head.S @@ -15,7 +15,7 @@ #include "sizes.h" __HEAD -ENTRY(startup_continue) +ENTRY(startup_decompressor) basr %r13,0 # get base |