• John Garry's avatar
    perf tools: Add arm64 version of get_cpuid() · df5a5f3c
    John Garry authored
    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: default avatarJohn Garry <john.garry@huawei.com>
    Tested-by: default avatarShaokun 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.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    df5a5f3c
header.c 1.88 KB