ARC: define uapi for BPF_PROG_TYPE_PERF_EVENT program type

Define appropriate uapi for the BPF_PROG_TYPE_PERF_EVENT program type
by exporting the user_regs_struct structure instead of the pt_regs
structure that is in-kernel only.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>

Author: Sergey Matyukevich

arch/arc/include/asm/perf_event.h

@@ -65,6 +65,10 @@ struct arc_reg_cc_build {
 
 #define PERF_COUNT_ARC_HW_MAX	(PERF_COUNT_HW_MAX + 8)
 
+#ifdef CONFIG_PERF_EVENTS
+#define perf_arch_bpf_user_pt_regs(regs) (struct user_regs_struct *)regs
+#endif
+
 /*
  * Some ARC pct quirks:
  *

arch/arc/include/uapi/asm/bpf_perf_event.h

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__
+#define _UAPI__ASM_BPF_PERF_EVENT_H__
+
+#include <asm/ptrace.h>
+
+typedef struct user_regs_struct bpf_user_pt_regs_t;
+
+#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */