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-rw-r--r--arch/s390/Kconfig21
-rw-r--r--arch/s390/Kconfig.debug3
-rw-r--r--arch/s390/Makefile3
-rw-r--r--arch/s390/boot/compressed/Makefile6
-rw-r--r--arch/s390/boot/compressed/misc.c5
-rw-r--r--arch/s390/include/asm/cacheflush.h4
-rw-r--r--arch/s390/kernel/machine_kexec.c2
-rw-r--r--arch/s390/mm/Makefile1
-rw-r--r--arch/s390/mm/pageattr.c55
9 files changed, 82 insertions, 18 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 636bcb81d068..2508a6f31588 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -85,6 +85,7 @@ config S390
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_LZO
+ select HAVE_KERNEL_XZ
select HAVE_GET_USER_PAGES_FAST
select HAVE_ARCH_MUTEX_CPU_RELAX
select ARCH_INLINE_SPIN_TRYLOCK
@@ -341,26 +342,16 @@ config STACK_GUARD
The minimum size for the stack guard should be 256 for 31 bit and
512 for 64 bit.
-config WARN_STACK
+config WARN_DYNAMIC_STACK
def_bool n
- prompt "Emit compiler warnings for function with broken stack usage"
+ prompt "Emit compiler warnings for function with dynamic stack usage"
help
- This option enables the compiler options -mwarn-framesize and
- -mwarn-dynamicstack. If the compiler supports these options it
- will generate warnings for function which either use alloca or
- create a stack frame bigger than CONFIG_WARN_STACK_SIZE.
+ This option enables the compiler option -mwarn-dynamicstack. If the
+ compiler supports this options generates warnings for functions
+ that dynamically allocate stack space using alloca.
Say N if you are unsure.
-config WARN_STACK_SIZE
- int "Maximum frame size considered safe (128-2048)"
- range 128 2048
- depends on WARN_STACK
- default "2048"
- help
- This allows you to specify the maximum frame size a function may
- have without the compiler complaining about it.
-
config ARCH_POPULATES_NODE_MAP
def_bool y
diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug
index 2b380df95606..d76cef3fef37 100644
--- a/arch/s390/Kconfig.debug
+++ b/arch/s390/Kconfig.debug
@@ -31,4 +31,7 @@ config DEBUG_STRICT_USER_COPY_CHECKS
If unsure, or if you run an older (pre 4.4) gcc, say N.
+config DEBUG_SET_MODULE_RONX
+ def_bool y
+ depends on MODULES
endmenu
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index d5b8a6ade525..27a0b5df5ead 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -80,8 +80,7 @@ endif
endif
ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
-cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack
-cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE)
+cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
endif
KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile
index 1c999f726a58..10e22c4ec4a7 100644
--- a/arch/s390/boot/compressed/Makefile
+++ b/arch/s390/boot/compressed/Makefile
@@ -7,7 +7,8 @@
BITS := $(if $(CONFIG_64BIT),64,31)
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 \
- vmlinux.bin.lzma vmlinux.bin.lzo misc.o piggy.o sizes.h head$(BITS).o
+ vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo misc.o piggy.o \
+ sizes.h head$(BITS).o
KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
KBUILD_CFLAGS += $(cflags-y)
@@ -48,6 +49,7 @@ suffix-$(CONFIG_KERNEL_GZIP) := gz
suffix-$(CONFIG_KERNEL_BZIP2) := bz2
suffix-$(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)
@@ -57,6 +59,8 @@ $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)
$(call if_changed,lzma)
$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)
$(call if_changed,lzo)
+$(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)
diff --git a/arch/s390/boot/compressed/misc.c b/arch/s390/boot/compressed/misc.c
index 2751b3a8a66f..028f23ea81d1 100644
--- a/arch/s390/boot/compressed/misc.c
+++ b/arch/s390/boot/compressed/misc.c
@@ -19,6 +19,7 @@
#undef memset
#undef memcpy
#undef memmove
+#define memmove memmove
#define memzero(s, n) memset((s), 0, (n))
/* Symbols defined by linker scripts */
@@ -54,6 +55,10 @@ static unsigned long free_mem_end_ptr;
#include "../../../../lib/decompress_unlzo.c"
#endif
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
extern _sclp_print_early(const char *);
int puts(const char *s)
diff --git a/arch/s390/include/asm/cacheflush.h b/arch/s390/include/asm/cacheflush.h
index 7e1f77620624..43a5c78046db 100644
--- a/arch/s390/include/asm/cacheflush.h
+++ b/arch/s390/include/asm/cacheflush.h
@@ -8,4 +8,8 @@
void kernel_map_pages(struct page *page, int numpages, int enable);
#endif
+int set_memory_ro(unsigned long addr, int numpages);
+int set_memory_rw(unsigned long addr, int numpages);
+int set_memory_nx(unsigned long addr, int numpages);
+
#endif /* _S390_CACHEFLUSH_H */
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index a922d51df6bf..b09b9c62573e 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -12,6 +12,7 @@
#include <linux/kexec.h>
#include <linux/delay.h>
#include <linux/reboot.h>
+#include <linux/ftrace.h>
#include <asm/cio.h>
#include <asm/setup.h>
#include <asm/pgtable.h>
@@ -71,6 +72,7 @@ static void __machine_kexec(void *data)
void machine_kexec(struct kimage *image)
{
+ tracer_disable();
smp_send_stop();
smp_switch_to_ipl_cpu(__machine_kexec, image);
}
diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile
index 6fbc6f3fbdf2..d98fe9004a52 100644
--- a/arch/s390/mm/Makefile
+++ b/arch/s390/mm/Makefile
@@ -6,3 +6,4 @@ obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o maccess.o \
page-states.o gup.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
+obj-$(CONFIG_DEBUG_SET_MODULE_RONX) += pageattr.o
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
new file mode 100644
index 000000000000..122ffbd08ce0
--- /dev/null
+++ b/arch/s390/mm/pageattr.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright IBM Corp. 2011
+ * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
+ */
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <asm/pgtable.h>
+
+static void change_page_attr(unsigned long addr, int numpages,
+ pte_t (*set) (pte_t))
+{
+ pte_t *ptep, pte;
+ pmd_t *pmdp;
+ pud_t *pudp;
+ pgd_t *pgdp;
+ int i;
+
+ for (i = 0; i < numpages; i++) {
+ pgdp = pgd_offset(&init_mm, addr);
+ pudp = pud_offset(pgdp, addr);
+ pmdp = pmd_offset(pudp, addr);
+ if (pmd_huge(*pmdp)) {
+ WARN_ON_ONCE(1);
+ continue;
+ }
+ ptep = pte_offset_kernel(pmdp, addr + i * PAGE_SIZE);
+
+ pte = *ptep;
+ pte = set(pte);
+ ptep_invalidate(&init_mm, addr + i * PAGE_SIZE, ptep);
+ *ptep = pte;
+ }
+}
+
+int set_memory_ro(unsigned long addr, int numpages)
+{
+ change_page_attr(addr, numpages, pte_wrprotect);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(set_memory_ro);
+
+int set_memory_rw(unsigned long addr, int numpages)
+{
+ change_page_attr(addr, numpages, pte_mkwrite);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(set_memory_rw);
+
+/* not possible */
+int set_memory_nx(unsigned long addr, int numpages)
+{
+ return 0;
+}
+EXPORT_SYMBOL_GPL(set_memory_nx);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 16:34:15 +0000