diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/uapi/asm/sthyi.h | 6 | ||||
| -rw-r--r-- | arch/s390/include/uapi/asm/unistd.h | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/compat_wrapper.c | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.h | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/sthyi.c | 33 | ||||
| -rw-r--r-- | arch/s390/kernel/syscalls.S | 1 |
6 files changed, 43 insertions, 2 deletions
diff --git a/arch/s390/include/uapi/asm/sthyi.h b/arch/s390/include/uapi/asm/sthyi.h new file mode 100644 index 000000000000..ec113db4eb7e --- /dev/null +++ b/arch/s390/include/uapi/asm/sthyi.h @@ -0,0 +1,6 @@ +#ifndef _UAPI_ASM_STHYI_H +#define _UAPI_ASM_STHYI_H + +#define STHYI_FC_CP_IFL_CAP 0 + +#endif /* _UAPI_ASM_STHYI_H */ diff --git a/arch/s390/include/uapi/asm/unistd.h b/arch/s390/include/uapi/asm/unistd.h index ea42290e7d51..61c64f543769 100644 --- a/arch/s390/include/uapi/asm/unistd.h +++ b/arch/s390/include/uapi/asm/unistd.h @@ -315,7 +315,8 @@ #define __NR_pwritev2 377 #define __NR_s390_guarded_storage 378 #define __NR_statx 379 -#define NR_syscalls 380 +#define __NR_s390_sthyi 380 +#define NR_syscalls 381 /* * There are some system calls that are not present on 64 bit, some diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c index 986642a3543b..eb0b17ed95b6 100644 --- a/arch/s390/kernel/compat_wrapper.c +++ b/arch/s390/kernel/compat_wrapper.c @@ -180,3 +180,4 @@ COMPAT_SYSCALL_WRAP3(mlock2, unsigned long, start, size_t, len, int, flags); COMPAT_SYSCALL_WRAP6(copy_file_range, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags); COMPAT_SYSCALL_WRAP2(s390_guarded_storage, int, command, struct gs_cb *, gs_cb); COMPAT_SYSCALL_WRAP5(statx, int, dfd, const char __user *, path, unsigned, flags, unsigned, mask, struct statx __user *, buffer); +COMPAT_SYSCALL_WRAP4(s390_sthyi, unsigned long, code, void __user *, info, u64 __user *, rc, unsigned long, flags); diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h index dbf5f7e18246..bb5301eeb4f4 100644 --- a/arch/s390/kernel/entry.h +++ b/arch/s390/kernel/entry.h @@ -77,6 +77,7 @@ long sys_s390_runtime_instr(int command, int signum); long sys_s390_guarded_storage(int command, struct gs_cb __user *); long sys_s390_pci_mmio_write(unsigned long, const void __user *, size_t); long sys_s390_pci_mmio_read(unsigned long, void __user *, size_t); +long sys_s390_sthyi(unsigned long function_code, void __user *buffer, u64 __user *return_code, unsigned long flags); DECLARE_PER_CPU(u64, mt_cycles[8]); 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; +} diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S index 54fce7b065de..0fb407ebbf46 100644 --- a/arch/s390/kernel/syscalls.S +++ b/arch/s390/kernel/syscalls.S @@ -388,3 +388,4 @@ SYSCALL(sys_preadv2,compat_sys_preadv2) SYSCALL(sys_pwritev2,compat_sys_pwritev2) SYSCALL(sys_s390_guarded_storage,compat_sys_s390_guarded_storage) /* 378 */ SYSCALL(sys_statx,compat_sys_statx) +SYSCALL(sys_s390_sthyi,compat_sys_s390_sthyi) |