diff options
Diffstat (limited to 'arch/s390/kernel/sthyi.c')
| -rw-r--r-- | arch/s390/kernel/sthyi.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/s390/kernel/sthyi.c b/arch/s390/kernel/sthyi.c index 27e3c3d87379..12981e197f01 100644 --- a/arch/s390/kernel/sthyi.c +++ b/arch/s390/kernel/sthyi.c @@ -11,13 +11,16 @@ #include <linux/errno.h> #include <linux/pagemap.h> #include <linux/vmalloc.h> - +#include <linux/syscalls.h> +#include <linux/mutex.h> #include <asm/asm-offsets.h> #include <asm/sclp.h> #include <asm/diag.h> #include <asm/sysinfo.h> #include <asm/ebcdic.h> #include <asm/facility.h> +#include <asm/sthyi.h> +#include "entry.h" #define DED_WEIGHT 0xffff /* @@ -484,3 +487,31 @@ out: return r; } EXPORT_SYMBOL_GPL(sthyi_fill); + +SYSCALL_DEFINE4(s390_sthyi, unsigned long, function_code, void __user *, buffer, + u64 __user *, return_code, unsigned long, flags) +{ + u64 sthyi_rc; + void *info; + int r; + + if (flags) + return -EINVAL; + if (function_code != STHYI_FC_CP_IFL_CAP) + return -EOPNOTSUPP; + info = (void *)get_zeroed_page(GFP_KERNEL); + if (!info) + return -ENOMEM; + r = sthyi_fill(info, &sthyi_rc); + if (r < 0) + goto out; + if (return_code && put_user(sthyi_rc, return_code)) { + r = -EFAULT; + goto out; + } + if (copy_to_user(buffer, info, PAGE_SIZE)) + r = -EFAULT; +out: + free_page((unsigned long)info); + return r; +} |