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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>
This commit is contained in:
Martin Schwidefsky 2016-03-31 09:55:17 +02:00
parent 4920e3cf77
commit 2583b848ca
3 changed files with 10 additions and 2 deletions
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2
arch/s390/include/asm/elf.h
View File

@ -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

2
arch/s390/kernel/processor.c
View File

@ -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"

8
arch/s390/kernel/setup.c
View File

@ -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) {