diff options
author | David Hildenbrand | 2015-02-24 15:54:47 +0100 |
---|---|---|
committer | Christian Borntraeger | 2015-11-30 12:47:11 +0100 |
commit | 7f16d7e787b731d9db273b822b4b8069102e57a6 (patch) | |
tree | 0012fd4f28ccb75065f5da8b40dd8235b790665d /arch/s390 | |
parent | 8dfd523f8523779210038264259546299a8398e9 (diff) |
s390: show virtualization support in /proc/cpuinfo
This patch exposes the SIE capability (aka virtualization support) via
/proc/cpuinfo -> "features" as "sie".
As we don't want to expose this hwcap via elf, let's add a second,
"internal"/non-elf capability list. The content is simply concatenated
to the existing features when printing /proc/cpuinfo.
We also add the defines to elf.h to keep the hwcap stuff at a common
place.
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r-- | arch/s390/include/asm/elf.h | 7 | ||||
-rw-r--r-- | arch/s390/kernel/processor.c | 6 | ||||
-rw-r--r-- | arch/s390/kernel/setup.c | 9 |
3 files changed, 22 insertions, 0 deletions
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h index bab6739a1154..08e34a5dc909 100644 --- a/arch/s390/include/asm/elf.h +++ b/arch/s390/include/asm/elf.h @@ -104,6 +104,9 @@ #define HWCAP_S390_TE 1024 #define HWCAP_S390_VXRS 2048 +/* Internal bits, not exposed via elf */ +#define HWCAP_INT_SIE 1UL + /* * These are used to set parameters in the core dumps. */ @@ -169,6 +172,10 @@ extern unsigned int vdso_enabled; extern unsigned long elf_hwcap; #define ELF_HWCAP (elf_hwcap) +/* Internal hardware capabilities, not exposed via elf */ + +extern unsigned long int_hwcap; + /* This yields a string that ld.so will use to load implementation specific libraries for optimization. This is more specific in intent than poking at uname or /proc/cpuinfo. diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c index 7ce00e7a709a..647128d5b983 100644 --- a/arch/s390/kernel/processor.c +++ b/arch/s390/kernel/processor.c @@ -61,6 +61,9 @@ static int show_cpuinfo(struct seq_file *m, void *v) "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp", "edat", "etf3eh", "highgprs", "te", "vx" }; + static const char * const int_hwcap_str[] = { + "sie" + }; unsigned long n = (unsigned long) v - 1; int i; @@ -75,6 +78,9 @@ static int show_cpuinfo(struct seq_file *m, void *v) for (i = 0; i < ARRAY_SIZE(hwcap_str); i++) if (hwcap_str[i] && (elf_hwcap & (1UL << i))) seq_printf(m, "%s ", hwcap_str[i]); + for (i = 0; i < ARRAY_SIZE(int_hwcap_str); i++) + if (int_hwcap_str[i] && (int_hwcap & (1UL << i))) + seq_printf(m, "%s ", int_hwcap_str[i]); seq_puts(m, "\n"); show_cacheinfo(m); } diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index c837bcacf218..dc83ae66a730 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -80,6 +80,8 @@ EXPORT_SYMBOL(console_irq); unsigned long elf_hwcap __read_mostly = 0; char elf_platform[ELF_PLATFORM_SIZE]; +unsigned long int_hwcap = 0; + int __initdata memory_end_set; unsigned long __initdata memory_end; unsigned long __initdata max_physmem_end; @@ -793,6 +795,13 @@ static int __init setup_hwcaps(void) strcpy(elf_platform, "z13"); break; } + + /* + * Virtualization support HWCAP_INT_SIE is bit 0. + */ + if (sclp.has_sief2) + int_hwcap |= HWCAP_INT_SIE; + return 0; } arch_initcall(setup_hwcaps); |