target/linux/generic/backport-5.15/330-v5.16-01-MIPS-kernel-proc-add-CPU-option-reporting.patch

   1 From 626bfa03729959ea9917181fb3d8ffaa1594d02a Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Wed, 13 Oct 2021 22:40:18 -0700
   4 Subject: [PATCH 1/1] MIPS: kernel: proc: add CPU option reporting
   5
   6 Many MIPS CPUs have optional CPU features which are not activated for
   7 all CPU cores. Print the CPU options, which are implemented in the core,
   8 in /proc/cpuinfo. This makes it possible to see which features are
   9 supported and which are not supported. This should cover all standard
  10 MIPS extensions. Before, it only printed information about the main MIPS
  11 ASEs.
  12
  13 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  14
  15 Changes from original patch[0]:
  16 - Remove cpu_has_6k_cache and cpu_has_8k_cache due to commit 6ce91ba8589a
  17   ("MIPS: Remove cpu_has_6k_cache and cpu_has_8k_cache in cpu_cache_init()")
  18 - Add new options: mac2008_only, ftlbparex, gsexcex, mmid, mm_sysad,
  19   mm_full
  20 - Use seq_puts instead of seq_printf as suggested by checkpatch
  21 - Minor commit message reword
  22
  23 [0]: https://lore.kernel.org/linux-mips/20181223225224.23042-1-hauke@hauke-m.de/
  24
  25 Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
  26 Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
  27 Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
  28 ---
  29  arch/mips/kernel/proc.c | 122 ++++++++++++++++++++++++++++++++++++++++
  30  1 file changed, 122 insertions(+)
  31
  32 --- a/arch/mips/kernel/proc.c
  33 +++ b/arch/mips/kernel/proc.c
  34 @@ -138,6 +138,128 @@ static int show_cpuinfo(struct seq_file
  35                 seq_printf(m, "micromips kernel\t: %s\n",
  36                       (read_c0_config3() & MIPS_CONF3_ISA_OE) ?  "yes" : "no");
  37         }
  38 +
  39 +       seq_puts(m, "Options implemented\t:");
  40 +       if (cpu_has_tlb)
  41 +               seq_puts(m, " tlb");
  42 +       if (cpu_has_ftlb)
  43 +               seq_puts(m, " ftlb");
  44 +       if (cpu_has_tlbinv)
  45 +               seq_puts(m, " tlbinv");
  46 +       if (cpu_has_segments)
  47 +               seq_puts(m, " segments");
  48 +       if (cpu_has_rixiex)
  49 +               seq_puts(m, " rixiex");
  50 +       if (cpu_has_ldpte)
  51 +               seq_puts(m, " ldpte");
  52 +       if (cpu_has_maar)
  53 +               seq_puts(m, " maar");
  54 +       if (cpu_has_rw_llb)
  55 +               seq_puts(m, " rw_llb");
  56 +       if (cpu_has_4kex)
  57 +               seq_puts(m, " 4kex");
  58 +       if (cpu_has_3k_cache)
  59 +               seq_puts(m, " 3k_cache");
  60 +       if (cpu_has_4k_cache)
  61 +               seq_puts(m, " 4k_cache");
  62 +       if (cpu_has_tx39_cache)
  63 +               seq_puts(m, " tx39_cache");
  64 +       if (cpu_has_octeon_cache)
  65 +               seq_puts(m, " octeon_cache");
  66 +       if (cpu_has_fpu)
  67 +               seq_puts(m, " fpu");
  68 +       if (cpu_has_32fpr)
  69 +               seq_puts(m, " 32fpr");
  70 +       if (cpu_has_cache_cdex_p)
  71 +               seq_puts(m, " cache_cdex_p");
  72 +       if (cpu_has_cache_cdex_s)
  73 +               seq_puts(m, " cache_cdex_s");
  74 +       if (cpu_has_prefetch)
  75 +               seq_puts(m, " prefetch");
  76 +       if (cpu_has_mcheck)
  77 +               seq_puts(m, " mcheck");
  78 +       if (cpu_has_ejtag)
  79 +               seq_puts(m, " ejtag");
  80 +       if (cpu_has_llsc)
  81 +               seq_puts(m, " llsc");
  82 +       if (cpu_has_guestctl0ext)
  83 +               seq_puts(m, " guestctl0ext");
  84 +       if (cpu_has_guestctl1)
  85 +               seq_puts(m, " guestctl1");
  86 +       if (cpu_has_guestctl2)
  87 +               seq_puts(m, " guestctl2");
  88 +       if (cpu_has_guestid)
  89 +               seq_puts(m, " guestid");
  90 +       if (cpu_has_drg)
  91 +               seq_puts(m, " drg");
  92 +       if (cpu_has_rixi)
  93 +               seq_puts(m, " rixi");
  94 +       if (cpu_has_lpa)
  95 +               seq_puts(m, " lpa");
  96 +       if (cpu_has_mvh)
  97 +               seq_puts(m, " mvh");
  98 +       if (cpu_has_vtag_icache)
  99 +               seq_puts(m, " vtag_icache");
 100 +       if (cpu_has_dc_aliases)
 101 +               seq_puts(m, " dc_aliases");
 102 +       if (cpu_has_ic_fills_f_dc)
 103 +               seq_puts(m, " ic_fills_f_dc");
 104 +       if (cpu_has_pindexed_dcache)
 105 +               seq_puts(m, " pindexed_dcache");
 106 +       if (cpu_has_userlocal)
 107 +               seq_puts(m, " userlocal");
 108 +       if (cpu_has_nofpuex)
 109 +               seq_puts(m, " nofpuex");
 110 +       if (cpu_has_vint)
 111 +               seq_puts(m, " vint");
 112 +       if (cpu_has_veic)
 113 +               seq_puts(m, " veic");
 114 +       if (cpu_has_inclusive_pcaches)
 115 +               seq_puts(m, " inclusive_pcaches");
 116 +       if (cpu_has_perf_cntr_intr_bit)
 117 +               seq_puts(m, " perf_cntr_intr_bit");
 118 +       if (cpu_has_ufr)
 119 +               seq_puts(m, " ufr");
 120 +       if (cpu_has_fre)
 121 +               seq_puts(m, " fre");
 122 +       if (cpu_has_cdmm)
 123 +               seq_puts(m, " cdmm");
 124 +       if (cpu_has_small_pages)
 125 +               seq_puts(m, " small_pages");
 126 +       if (cpu_has_nan_legacy)
 127 +               seq_puts(m, " nan_legacy");
 128 +       if (cpu_has_nan_2008)
 129 +               seq_puts(m, " nan_2008");
 130 +       if (cpu_has_ebase_wg)
 131 +               seq_puts(m, " ebase_wg");
 132 +       if (cpu_has_badinstr)
 133 +               seq_puts(m, " badinstr");
 134 +       if (cpu_has_badinstrp)
 135 +               seq_puts(m, " badinstrp");
 136 +       if (cpu_has_contextconfig)
 137 +               seq_puts(m, " contextconfig");
 138 +       if (cpu_has_perf)
 139 +               seq_puts(m, " perf");
 140 +       if (cpu_has_mac2008_only)
 141 +               seq_puts(m, " mac2008_only");
 142 +       if (cpu_has_ftlbparex)
 143 +               seq_puts(m, " ftlbparex");
 144 +       if (cpu_has_gsexcex)
 145 +               seq_puts(m, " gsexcex");
 146 +       if (cpu_has_shared_ftlb_ram)
 147 +               seq_puts(m, " shared_ftlb_ram");
 148 +       if (cpu_has_shared_ftlb_entries)
 149 +               seq_puts(m, " shared_ftlb_entries");
 150 +       if (cpu_has_mipsmt_pertccounters)
 151 +               seq_puts(m, " mipsmt_pertccounters");
 152 +       if (cpu_has_mmid)
 153 +               seq_puts(m, " mmid");
 154 +       if (cpu_has_mm_sysad)
 155 +               seq_puts(m, " mm_sysad");
 156 +       if (cpu_has_mm_full)
 157 +               seq_puts(m, " mm_full");
 158 +       seq_puts(m, "\n");
 159 +
 160         seq_printf(m, "shadow register sets\t: %d\n",
 161                       cpu_data[n].srsets);
 162         seq_printf(m, "kscratch registers\t: %d\n",