1 files changed, 98 insertions, 0 deletions

diff --git a/arch/s390/include/asm/runtime_instr.h b/arch/s390/include/asm/runtime_instr.h
new file mode 100644
index 000000000000..830da737ff85
--- /dev/null
+++ b/arch/s390/include/asm/runtime_instr.h
@@ -0,0 +1,98 @@
+#ifndef _RUNTIME_INSTR_H
+#define _RUNTIME_INSTR_H
+
+#define S390_RUNTIME_INSTR_START        0x1
+#define S390_RUNTIME_INSTR_STOP         0x2
+
+struct runtime_instr_cb {
+        __u64 buf_current;
+        __u64 buf_origin;
+        __u64 buf_limit;
+
+        __u32 valid             : 1;
+        __u32 pstate            : 1;
+        __u32 pstate_set_buf    : 1;
+        __u32 home_space        : 1;
+        __u32 altered           : 1;
+        __u32                   : 3;
+        __u32 pstate_sample     : 1;
+        __u32 sstate_sample     : 1;
+        __u32 pstate_collect    : 1;
+        __u32 sstate_collect    : 1;
+        __u32                   : 1;
+        __u32 halted_int        : 1;
+        __u32 int_requested     : 1;
+        __u32 buffer_full_int   : 1;
+        __u32 key               : 4;
+        __u32                   : 9;
+        __u32 rgs               : 3;
+
+        __u32 mode              : 4;
+        __u32 next              : 1;
+        __u32 mae               : 1;
+        __u32                   : 2;
+        __u32 call_type_br      : 1;
+        __u32 return_type_br    : 1;
+        __u32 other_type_br     : 1;
+        __u32 bc_other_type     : 1;
+        __u32 emit              : 1;
+        __u32 tx_abort          : 1;
+        __u32                   : 2;
+        __u32 bp_xn             : 1;
+        __u32 bp_xt             : 1;
+        __u32 bp_ti             : 1;
+        __u32 bp_ni             : 1;
+        __u32 suppr_y           : 1;
+        __u32 suppr_z           : 1;
+
+        __u32 dc_miss_extra     : 1;
+        __u32 lat_lev_ignore    : 1;
+        __u32 ic_lat_lev        : 4;
+        __u32 dc_lat_lev        : 4;
+
+        __u64 reserved1;
+        __u64 scaling_factor;
+        __u64 rsic;
+        __u64 reserved2;
+} __packed __aligned(8);
+
+extern struct runtime_instr_cb runtime_instr_empty_cb;
+
+static inline void load_runtime_instr_cb(struct runtime_instr_cb *cb)
+{
+        asm volatile(".insn     rsy,0xeb0000000060,0,0,%0"      /* LRIC */
+                : : "Q" (*cb));
+}
+
+static inline void store_runtime_instr_cb(struct runtime_instr_cb *cb)
+{
+        asm volatile(".insn     rsy,0xeb0000000061,0,0,%0"      /* STRIC */
+                : "=Q" (*cb) : : "cc");
+}
+
+static inline void save_ri_cb(struct runtime_instr_cb *cb_prev)
+{
+#ifdef CONFIG_64BIT
+        if (cb_prev)
+                store_runtime_instr_cb(cb_prev);
+#endif
+}
+
+static inline void restore_ri_cb(struct runtime_instr_cb *cb_next,
+                                 struct runtime_instr_cb *cb_prev)
+{
+#ifdef CONFIG_64BIT
+        if (cb_next)
+                load_runtime_instr_cb(cb_next);
+        else if (cb_prev)
+                load_runtime_instr_cb(&runtime_instr_empty_cb);
+#endif
+}
+
+#ifdef CONFIG_64BIT
+extern void exit_thread_runtime_instr(void);
+#else
+static inline void exit_thread_runtime_instr(void) { }
+#endif
+
+#endif /* _RUNTIME_INSTR_H */