linux/tools/perf/arch/arm64
John Garry df5a5f3cf2 perf tools: Add arm64 version of get_cpuid()
Add an arm64 version of get_cpuid(), which is used for various annotation
and headers - for example, I now get the CPUID in "perf report --header",
as shown in this snippet:

  # hostname : ubuntu
  # os release : 5.5.0-rc1-dirty
  # perf version : 5.5.rc1.gbf8a13dc9851
  # arch : aarch64
  # nrcpus online : 96
  # nrcpus avail : 96
  # cpuid : 0x00000000480fd010

Since much of the code to read the MIDR is already in get_cpuid_str(),
factor out this code.

Tester notes:

I tested this patch on my new ARM64 Kunpeng 920 server.
[root@node1 zsk]# ./perf --version
perf version 5.6.rc1.g2cdb955b7252

Both perf list and perf stat can work.

Signed-off-by: John Garry <john.garry@huawei.com>
Tested-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
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: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxarm@huawei.com
Link: http://lore.kernel.org/lkml/1576245255-210926-1-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-02-12 10:36:51 -03:00
..
annotate perf annotate: Fix arch specific ->init() failure errors 2019-09-30 17:30:03 -03:00
entry/syscalls perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel 2019-05-28 09:49:03 -03:00
include perf tools arm64: Add libdw DWARF post unwind support for ARM64 2018-03-16 13:53:46 -03:00
tests perf bench: Update the copies of x86's mem{cpy,set}_64.S 2019-12-02 11:40:57 -03:00
util perf tools: Add arm64 version of get_cpuid() 2020-02-12 10:36:51 -03:00
Build perf tests arm64: Compile tests unconditionally 2019-06-17 15:57:16 -03:00
Makefile perf arm64: Fix include path for asm-generic/unistd.h 2018-08-30 14:49:24 -03:00