s390: report new CPU capabilities

Add hardware capability bits and features tags to /proc/cpuinfo
for 4 new CPU features:
  "Vector-Enhancements Facility 2" (tag "vxe2", hwcap 2^15)
  "Vector-Packed-Decimal-Enhancement Facility" (tag "vxp", hwcap 2^16)
  "Enhanced-Sort Facility" (tag "sort", hwcap 2^17)
  "Deflate-Conversion Facility" (tag "dflt", hwcap 2^18)
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/elf.h

@@ -107,6 +107,10 @@
 #define HWCAP_S390_VXRS_BCD	4096
 #define HWCAP_S390_VXRS_EXT	8192
 #define HWCAP_S390_GS		16384
+#define HWCAP_S390_VXRS_EXT2	32768
+#define HWCAP_S390_VXRS_PDE	65536
+#define HWCAP_S390_SORT		131072
+#define HWCAP_S390_DFLT		262144
 
 /* Internal bits, not exposed via elf */
 #define HWCAP_INT_SIE		1UL

arch/s390/kernel/processor.c

@@ -109,7 +109,8 @@ static void show_cpu_summary(struct seq_file *m, void *v)
 {
 	static const char *hwcap_str[] = {
 		"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
-		"edat", "etf3eh", "highgprs", "te", "vx", "vxd", "vxe", "gs"
+		"edat", "etf3eh", "highgprs", "te", "vx", "vxd", "vxe", "gs",
+		"vxe2", "vxp", "sort", "dflt"
 	};
 	static const char * const int_hwcap_str[] = {
 		"sie"

arch/s390/kernel/setup.c

@@ -919,7 +919,15 @@ static int __init setup_hwcaps(void)
 			elf_hwcap |= HWCAP_S390_VXRS_EXT;
 		if (test_facility(135))
 			elf_hwcap |= HWCAP_S390_VXRS_BCD;
+		if (test_facility(148))
+			elf_hwcap |= HWCAP_S390_VXRS_EXT2;
+		if (test_facility(152))
+			elf_hwcap |= HWCAP_S390_VXRS_PDE;
 	}
+	if (test_facility(150))
+		elf_hwcap |= HWCAP_S390_SORT;
+	if (test_facility(151))
+		elf_hwcap |= HWCAP_S390_DFLT;
 
 	/*
 	 * Guarded storage support HWCAP_S390_GS is bit 12.