[S390] ftrace: add dynamic ftrace support
Dynamic ftrace support for s390.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index 5a5bc75..ba23d8f 100644
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -2,7 +2,26 @@
#define _ASM_S390_FTRACE_H
#ifndef __ASSEMBLY__
+
extern void _mcount(void);
+extern unsigned long ftrace_dyn_func;
+
+struct dyn_arch_ftrace { };
+
+#define MCOUNT_ADDR ((long)_mcount)
+
+#ifdef CONFIG_64BIT
+#define MCOUNT_INSN_SIZE 24
+#define MCOUNT_OFFSET 14
+#else
+#define MCOUNT_INSN_SIZE 30
+#define MCOUNT_OFFSET 8
#endif
+static inline unsigned long ftrace_call_adjust(unsigned long addr)
+{
+ return addr - MCOUNT_OFFSET;
+}
+
+#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_FTRACE_H */
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 713fe9f..5046ad6 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -68,6 +68,7 @@
#define __LC_CPUID 0x02b0
#define __LC_INT_CLOCK 0x02c8
#define __LC_MACHINE_FLAGS 0x02d8
+#define __LC_FTRACE_FUNC 0x02dc
#define __LC_IRB 0x0300
#define __LC_PFAULT_INTPARM 0x0080
#define __LC_CPU_TIMER_SAVE_AREA 0x00d8
@@ -113,6 +114,7 @@
#define __LC_INT_CLOCK 0x0340
#define __LC_VDSO_PER_CPU 0x0350
#define __LC_MACHINE_FLAGS 0x0358
+#define __LC_FTRACE_FUNC 0x0360
#define __LC_IRB 0x0380
#define __LC_PASTE 0x03c0
#define __LC_PFAULT_INTPARM 0x11b8
@@ -281,7 +283,8 @@
__u64 int_clock; /* 0x02c8 */
__u64 clock_comparator; /* 0x02d0 */
__u32 machine_flags; /* 0x02d8 */
- __u8 pad_0x02dc[0x0300-0x02dc]; /* 0x02dc */
+ __u32 ftrace_func; /* 0x02dc */
+ __u8 pad_0x02f0[0x0300-0x02f0]; /* 0x02f0 */
/* Interrupt response block */
__u8 irb[64]; /* 0x0300 */
@@ -386,7 +389,8 @@
__u64 clock_comparator; /* 0x0348 */
__u64 vdso_per_cpu_data; /* 0x0350 */
__u64 machine_flags; /* 0x0358 */
- __u8 pad_0x0360[0x0380-0x0360]; /* 0x0360 */
+ __u64 ftrace_func; /* 0x0360 */
+ __u8 pad_0x0368[0x0380-0x0368]; /* 0x0368 */
/* Interrupt response block. */
__u8 irb[64]; /* 0x0380 */
