From 2583b848cad049cf5f3f0a03af8b140668b376f3 Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Thu, 31 Mar 2016 09:55:17 +0200
Subject: [PATCH] s390: report new vector facilities
Add hardware capability bits and feature tags to /proc/cpuinfo for
the "Vector Packed Decimal Facility" (tag "vxd" / hwcap bit 2^12)
and the "Vector Enhancements Facility 1" (tag "vxe" / hwcap bit 2^13).
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
arch/s390/include/asm/elf.h | 2 ++
arch/s390/kernel/processor.c | 2 +-
arch/s390/kernel/setup.c | 8 +++++++-
3 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index f4381e1fb19e5..83aaefed2a7b0 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -103,6 +103,8 @@
#define HWCAP_S390_HIGH_GPRS 512
#define HWCAP_S390_TE 1024
#define HWCAP_S390_VXRS 2048
+#define HWCAP_S390_VXRS_BCD 4096
+#define HWCAP_S390_VXRS_EXT 8192
/* Internal bits, not exposed via elf */
#define HWCAP_INT_SIE 1UL
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 8733b07b56910..21004aaac69b0 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -92,7 +92,7 @@ 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"
+ "edat", "etf3eh", "highgprs", "te", "vx", "vxd", "vxe"
};
static const char * const int_hwcap_str[] = {
"sie"
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index f92c78277680f..8d59f20a658f6 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -769,8 +769,14 @@ static int __init setup_hwcaps(void)
* can be disabled with the "novx" parameter. Use MACHINE_HAS_VX
* instead of facility bit 129.
*/
- if (MACHINE_HAS_VX)
+ if (MACHINE_HAS_VX) {
elf_hwcap |= HWCAP_S390_VXRS;
+ if (test_facility(134))
+ elf_hwcap |= HWCAP_S390_VXRS_EXT;
+ if (test_facility(135))
+ elf_hwcap |= HWCAP_S390_VXRS_BCD;
+ }
+
get_cpu_id(&cpu_id);
add_device_randomness(&cpu_id, sizeof(cpu_id));
switch (cpu_id.machine) {
--
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