Two new data source fields, to indicate the block reasons of a load
instruction, are introduced on the Intel Sapphire Rapids server. The
fields can be used by the memory profiling.

Add a new sort function, SORT_MEM_BLOCKED, for the two fields.

For the previous platforms or the block reason is unknown, print "N/A"
for the block reason.

Add blocked as a default mem sort key for perf report and perf mem
report.

Committer testing:

So in machines without this capability we get a "N/A" filling the new "Blocked"
column:

  $ perf mem record ls
  arch     certs	 CREDITS  Documentation  include  ipc     Kconfig  lib       MAINTAINERS  mm   samples  security  usr    block
  COPYING	 crypto	 drivers  fs             init     Kbuild  kernel   LICENSES  Makefile     net  README   scripts   sound  tools
  virt
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.008 MB perf.data (17 samples) ]
  $
  $ perf mem report --stdio
  # To display the perf.data header info, please use --header/--header-only options.
  #
  # Total Lost Samples: 0
  #
  # Samples: 6  of event 'cpu/mem-loads,ldlat=30/Pu'
  # Total weight : 1381
  # Sort order   : local_weight,mem,sym,dso,symbol_daddr,dso_daddr,snoop,tlb,locked,blocked
  #
  # Overhead  Samples  Local Weight  Memory access         Symbol                   Shared Object  Data Symbol             Data Object   Snoop  TLB access    Locked  Blocked
  # ........  .......  ............  ....................  .......................  .............  ......................  ............  .....  ............  ......  .......
  #
      32.87%        1  454           Local RAM or RAM hit  [.] _dl_relocate_object  ld-2.31.so     [.] 0x00007fe91cef3078  libc-2.31.so  Hit    L1 or L2 hit  No       N/A
      25.56%        1  353           LFB or LFB hit        [.] strcmp               ld-2.31.so     [.] 0x00005586973855ca  ls            None   L1 or L2 hit  No       N/A
      22.59%        1  312           LFB or LFB hit        [.] _dl_cache_libcmp     ld-2.31.so     [.] 0x00007fe91d0e3b18  ld.so.cache   None   L1 or L2 hit  No       N/A
       8.47%        1  117           LFB or LFB hit        [.] _dl_relocate_object  ld-2.31.so     [.] 0x00007fe91ceee570  libc-2.31.so  None   L1 or L2 hit  No       N/A
       6.88%        1  95            LFB or LFB hit        [.] _dl_relocate_object  ld-2.31.so     [.] 0x00007fe91ceed490  libc-2.31.so  None   L1 or L2 hit  No       N/A
       3.62%        1  50            LFB or LFB hit        [.] _dl_cache_libcmp     ld-2.31.so     [.] 0x00007fe91d0ebe60  ld.so.cache   None   L1 or L2 hit  No       N/A

  # Samples: 11  of event 'cpu/mem-stores/Pu'
  # Total weight : 11
  # Sort order   : local_weight,mem,sym,dso,symbol_daddr,dso_daddr,snoop,tlb,locked,blocked
  #
  # Overhead  Samples  Local Weight  Memory access  Symbol                   Shared Object  Data Symbol             Data Object  Snoop  TLB access  Locked  Blocked
  # ........  .......  ............  .............  .......................  .............  ......................  ...........  .....  ..........  ......  .......
  #
       9.09%        1  0             L1 hit         [.] __strcoll_l          libc-2.31.so   [.] 0x00007fffe5648fc8  [stack]      N/A    N/A         N/A      N/A
       9.09%        1  0             L1 hit         [.] _dl_lookup_symbol_x  ld-2.31.so     [.] 0x00007fffe56490b8  [stack]      N/A    N/A         N/A      N/A
       9.09%        1  0             L1 hit         [.] _dl_name_match_p     ld-2.31.so     [.] 0x00007fffe56487d8  [stack]      N/A    N/A         N/A      N/A
       9.09%        1  0             L1 hit         [.] _dl_start            ld-2.31.so     [.] start_time+0x0      ld-2.31.so   N/A    N/A         N/A      N/A
       9.09%        1  0             L1 hit         [.] _dl_sysdep_start     ld-2.31.so     [.] 0x00007fffe56494b8  [stack]      N/A    N/A         N/A      N/A
       9.09%        1  0             L1 hit         [.] do_lookup_x          ld-2.31.so     [.] 0x00007fffe5648ff8  [stack]      N/A    N/A         N/A      N/A
       9.09%        1  0             L1 hit         [.] do_lookup_x          ld-2.31.so     [.] 0x00007fffe5649064  [stack]      N/A    N/A         N/A      N/A
       9.09%        1  0             L1 hit         [.] do_lookup_x          ld-2.31.so     [.] 0x00007fffe5649130  [stack]      N/A    N/A         N/A      N/A
       9.09%        1  0             L1 miss        [.] _dl_start            ld-2.31.so     [.] _rtld_global+0xaf8  ld-2.31.so   N/A    N/A         N/A      N/A
       9.09%        1  0             L1 miss        [.] _dl_start            ld-2.31.so     [.] _rtld_global+0xc28  ld-2.31.so   N/A    N/A         N/A      N/A
       9.09%        1  0             L1 miss        [.] _dl_start            ld-2.31.so     [.] 0x00007fffe56495b8  [stack]      N/A    N/A         N/A      N/A

  # (Tip: Show user configuration overrides: perf config --user --list)
  $
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/1612296553-21962-4-git-send-email-kan.liang@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>