perf tools: Copy uapi/asm/perf_regs.h from the kernel for MIPS

To allow the build to complete on older systems, where those files are
either not uptodate, lacking some recent additions or not present at
all.

And check if the copy drifts from the kernel.

This commit is similar with
commit 12f0203 ("tools: Copy uapi/asm/perf_regs.h from the kernel")

With this commit, we can avoid the following build error in any case:

tools/perf/arch/mips/include/perf_regs.h:7:10:
fatal error: asm/perf_regs.h: No such file or directory
 #include <asm/perf_regs.h>
          ^~~~~~~~~~~~~~~~~
compilation terminated.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Xuefeng Li <lixuefeng@loongson.cn>
Link: http://lore.kernel.org/lkml/1622548436-12472-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/arch/mips/include/uapi/asm/perf_regs.h

@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _ASM_MIPS_PERF_REGS_H
+#define _ASM_MIPS_PERF_REGS_H
+
+enum perf_event_mips_regs {
+	PERF_REG_MIPS_PC,
+	PERF_REG_MIPS_R1,
+	PERF_REG_MIPS_R2,
+	PERF_REG_MIPS_R3,
+	PERF_REG_MIPS_R4,
+	PERF_REG_MIPS_R5,
+	PERF_REG_MIPS_R6,
+	PERF_REG_MIPS_R7,
+	PERF_REG_MIPS_R8,
+	PERF_REG_MIPS_R9,
+	PERF_REG_MIPS_R10,
+	PERF_REG_MIPS_R11,
+	PERF_REG_MIPS_R12,
+	PERF_REG_MIPS_R13,
+	PERF_REG_MIPS_R14,
+	PERF_REG_MIPS_R15,
+	PERF_REG_MIPS_R16,
+	PERF_REG_MIPS_R17,
+	PERF_REG_MIPS_R18,
+	PERF_REG_MIPS_R19,
+	PERF_REG_MIPS_R20,
+	PERF_REG_MIPS_R21,
+	PERF_REG_MIPS_R22,
+	PERF_REG_MIPS_R23,
+	PERF_REG_MIPS_R24,
+	PERF_REG_MIPS_R25,
+	PERF_REG_MIPS_R26,
+	PERF_REG_MIPS_R27,
+	PERF_REG_MIPS_R28,
+	PERF_REG_MIPS_R29,
+	PERF_REG_MIPS_R30,
+	PERF_REG_MIPS_R31,
+	PERF_REG_MIPS_MAX = PERF_REG_MIPS_R31 + 1,
+};
+#endif /* _ASM_MIPS_PERF_REGS_H */

tools/perf/Makefile.config

@@ -90,7 +90,6 @@ endif
 ifeq ($(ARCH),mips)
   NO_PERF_REGS := 0
   CFLAGS += -I$(OUTPUT)arch/mips/include/generated
-  CFLAGS += -I../../arch/mips/include/uapi -I../../arch/mips/include/generated/uapi
   LIBUNWIND_LIBS = -lunwind -lunwind-mips
 endif
 

tools/perf/check-headers.sh

@@ -39,6 +39,7 @@ arch/x86/lib/x86-opcode-map.txt
 arch/x86/tools/gen-insn-attr-x86.awk
 arch/arm/include/uapi/asm/perf_regs.h
 arch/arm64/include/uapi/asm/perf_regs.h
+arch/mips/include/uapi/asm/perf_regs.h
 arch/powerpc/include/uapi/asm/perf_regs.h
 arch/s390/include/uapi/asm/perf_regs.h
 arch/x86/include/uapi/asm/perf_regs.h