6 files changed, 160 insertions, 0 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 647bd14b223e..224b42734f0d 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -106,6 +106,7 @@ drivers-y	+= drivers/s390/
 drivers-$(CONFIG_OPROFILE)	+= arch/s390/oprofile/
 
 boot		:= arch/s390/boot
+tools		:= arch/s390/tools
 
 all: image bzImage
 
@@ -124,6 +125,10 @@ vdso_install:
 
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
+	$(Q)$(MAKE) $(clean)=$(tools)
+
+archprepare:
+	$(Q)$(MAKE) $(build)=$(tools) include/generated/facilities.h
 
 # Don't use tabs in echo arguments
 define archhelp
diff --git a/arch/s390/include/asm/facilities_src.h b/arch/s390/include/asm/facilities_src.h
new file mode 100644
index 000000000000..4555fa69a29e
--- /dev/null
+++ b/arch/s390/include/asm/facilities_src.h
@@ -0,0 +1,67 @@
+/*
+ *    Copyright IBM Corp. 2015
+ */
+
+#ifndef S390_GEN_FACILITIES_C
+#error "This file can only be included by gen_facilities.c"
+#endif
+
+#include <linux/kconfig.h>
+
+struct facility_def {
+	char *name;
+	int *bits;
+};
+
+static struct facility_def facility_defs[] = {
+	{
+		/*
+		 * FACILITIES_ALS contains the list of facilities that are
+		 * required to run a kernel that is compiled e.g. with
+		 * -march=<machine>.
+		 */
+		.name = "FACILITIES_ALS",
+		.bits = (int[]){
+#ifdef CONFIG_HAVE_MARCH_Z900_FEATURES
+			0,  /* N3 instructions */
+			1,  /* z/Arch mode installed */
+#endif
+#ifdef CONFIG_HAVE_MARCH_Z990_FEATURES
+			18, /* long displacement facility */
+#endif
+#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
+			7,  /* stfle */
+			16, /* extended translation facility 2 */
+			17, /* message security assist */
+			20, /* HFP-multiply-and-add */
+			21, /* extended-immediate facility */
+			22, /* extended-translation facility 3 */
+			23, /* HFP-unnormalized-extension */
+			24, /* ETF2-enhancement */
+			25, /* store clock fast */
+			30, /* ETF3-enhancement */
+#endif
+#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
+			26, /* parsing enhancement facility */
+			27, /* mvcos */
+			32, /* compare and swap and store */
+			33, /* compare and swap and store 2 */
+			34, /* general extension facility */
+			35, /* execute extensions */
+			41, /* floating point support enhancement */
+			42, /* DFP facility */
+			44, /* PFPO */
+#endif
+#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
+			37, /* floating point extension */
+			45, /* fast-BCR, etc. */
+#endif
+#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
+			48, /* decimal floating point zoned */
+			49, /* misc-instruction-extensions */
+			52, /* interlocked facility 2 */
+#endif
+			-1 /* END */
+		}
+	},
+};
diff --git a/arch/s390/include/asm/facility.h b/arch/s390/include/asm/facility.h
index b4f99d22ba04..007163f91856 100644
--- a/arch/s390/include/asm/facility.h
+++ b/arch/s390/include/asm/facility.h
@@ -7,6 +7,10 @@
 #ifndef __ASM_FACILITY_H
 #define __ASM_FACILITY_H
 
+#include <generated/facilities.h>
+
+#ifndef __ASSEMBLY__
+
 #include <linux/string.h>
 #include <linux/preempt.h>
 #include <asm/lowcore.h>
@@ -62,4 +66,5 @@ static inline void stfle(u64 *stfle_fac_list, int size)
 	preempt_enable();
 }
 
+#endif /* __ASSEMBLY__ */
 #endif /* __ASM_FACILITY_H */
diff --git a/arch/s390/tools/.gitignore b/arch/s390/tools/.gitignore
new file mode 100644
index 000000000000..72a4b2cf1365
--- /dev/null
+++ b/arch/s390/tools/.gitignore
@@ -0,0 +1 @@
+gen_facilities
diff --git a/arch/s390/tools/Makefile b/arch/s390/tools/Makefile
new file mode 100644
index 000000000000..6d9814c9df2b
--- /dev/null
+++ b/arch/s390/tools/Makefile
@@ -0,0 +1,15 @@
+#
+# Makefile for s390 specific build tools
+#
+
+hostprogs-y		    += gen_facilities
+HOSTCFLAGS_gen_facilities.o += -Wall $(LINUXINCLUDE)
+
+define filechk_facilities.h
+	$(obj)/gen_facilities
+endef
+
+$(obj)/gen_facilities.o: $(srctree)/arch/s390/tools/gen_facilities.c
+
+include/generated/facilities.h: $(obj)/gen_facilities FORCE
+	$(call filechk,facilities.h)
diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c
new file mode 100644
index 000000000000..e2660d27889b
--- /dev/null
+++ b/arch/s390/tools/gen_facilities.c
@@ -0,0 +1,67 @@
+/*
+ * Simple program to generate defines out of facility lists that use the bit
+ * numbering scheme from the Princples of Operations: most significant bit
+ * has bit number 0.
+ *
+ *    Copyright IBM Corp. 2015
+ *
+ */
+
+#define S390_GEN_FACILITIES_C
+
+#include <strings.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <asm/facilities_src.h>
+
+static void print_facility_list(struct facility_def *def)
+{
+	unsigned int high, bit, dword, i;
+	unsigned long long *array;
+
+	array = calloc(1, 8);
+	if (!array)
+		exit(EXIT_FAILURE);
+	high = 0;
+	for (i = 0; def->bits[i] != -1; i++) {
+		bit = 63 - (def->bits[i] & 63);
+		dword = def->bits[i] / 64;
+		if (dword > high) {
+			array = realloc(array, (dword + 1) * 8);
+			if (!array)
+				exit(EXIT_FAILURE);
+			memset(array + high + 1, 0, (dword - high) * 8);
+			high = dword;
+		}
+		array[dword] |= 1ULL << bit;
+	}
+	printf("#define %s ", def->name);
+	for (i = 0; i <= high; i++)
+		printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
+	printf("#define %s_DWORDS %d\n", def->name, high + 1);
+	free(array);
+}
+
+static void print_facility_lists(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < sizeof(facility_defs) / sizeof(facility_defs[0]); i++)
+		print_facility_list(&facility_defs[i]);
+}
+
+int main(int argc, char **argv)
+{
+	printf("#ifndef __ASM_S390_FACILITIES__\n");
+	printf("#define __ASM_S390_FACILITIES__\n");
+	printf("/*\n");
+	printf(" * DO NOT MODIFY.\n");
+	printf(" *\n");
+	printf(" * This file was generated by %s\n", __FILE__);
+	printf(" */\n\n");
+	printf("#include <linux/const.h>\n\n");
+	print_facility_lists();
+	printf("\n#endif\n");
+	return 0;
+}