MIPS: kernel: proc: add CPU option reporting

Many MIPS CPUs have optional CPU features which are not activated for
all CPU cores. Print the CPU options, which are implemented in the core,
in /proc/cpuinfo. This makes it possible to see which features are
supported and which are not supported. This should cover all standard
MIPS extensions. Before, it only printed information about the main MIPS
ASEs.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Changes from original patch[0]:
- Remove cpu_has_6k_cache and cpu_has_8k_cache due to commit af5c849a2d9f
  ("MIPS: Remove cpu_has_6k_cache and cpu_has_8k_cache in cpu_cache_init()")
- Add new options: mac2008_only, ftlbparex, gsexcex, mmid, mm_sysad,
  mm_full
- Use seq_puts instead of seq_printf as suggested by checkpatch
- Minor commit message reword

[0]: https://lore.kernel.org/linux-mips/20181223225224.23042-1-hauke@hauke-m.de/

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 7d8481d9acc331ca76c2d2adb65177ad7d1a8569..376a6e2676e9e2f128b10b6607f99a1dc6d45223 100644 (file)
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -157,6 +157,128 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                seq_printf(m, "micromips kernel\t: %s\n",
                      (read_c0_config3() & MIPS_CONF3_ISA_OE) ?  "yes" : "no");
        }
+
+       seq_puts(m, "Options implemented\t:");
+       if (cpu_has_tlb)
+               seq_puts(m, " tlb");
+       if (cpu_has_ftlb)
+               seq_puts(m, " ftlb");
+       if (cpu_has_tlbinv)
+               seq_puts(m, " tlbinv");
+       if (cpu_has_segments)
+               seq_puts(m, " segments");
+       if (cpu_has_rixiex)
+               seq_puts(m, " rixiex");
+       if (cpu_has_ldpte)
+               seq_puts(m, " ldpte");
+       if (cpu_has_maar)
+               seq_puts(m, " maar");
+       if (cpu_has_rw_llb)
+               seq_puts(m, " rw_llb");
+       if (cpu_has_4kex)
+               seq_puts(m, " 4kex");
+       if (cpu_has_3k_cache)
+               seq_puts(m, " 3k_cache");
+       if (cpu_has_4k_cache)
+               seq_puts(m, " 4k_cache");
+       if (cpu_has_tx39_cache)
+               seq_puts(m, " tx39_cache");
+       if (cpu_has_octeon_cache)
+               seq_puts(m, " octeon_cache");
+       if (cpu_has_fpu)
+               seq_puts(m, " fpu");
+       if (cpu_has_32fpr)
+               seq_puts(m, " 32fpr");
+       if (cpu_has_cache_cdex_p)
+               seq_puts(m, " cache_cdex_p");
+       if (cpu_has_cache_cdex_s)
+               seq_puts(m, " cache_cdex_s");
+       if (cpu_has_prefetch)
+               seq_puts(m, " prefetch");
+       if (cpu_has_mcheck)
+               seq_puts(m, " mcheck");
+       if (cpu_has_ejtag)
+               seq_puts(m, " ejtag");
+       if (cpu_has_llsc)
+               seq_puts(m, " llsc");
+       if (cpu_has_guestctl0ext)
+               seq_puts(m, " guestctl0ext");
+       if (cpu_has_guestctl1)
+               seq_puts(m, " guestctl1");
+       if (cpu_has_guestctl2)
+               seq_puts(m, " guestctl2");
+       if (cpu_has_guestid)
+               seq_puts(m, " guestid");
+       if (cpu_has_drg)
+               seq_puts(m, " drg");
+       if (cpu_has_rixi)
+               seq_puts(m, " rixi");
+       if (cpu_has_lpa)
+               seq_puts(m, " lpa");
+       if (cpu_has_mvh)
+               seq_puts(m, " mvh");
+       if (cpu_has_vtag_icache)
+               seq_puts(m, " vtag_icache");
+       if (cpu_has_dc_aliases)
+               seq_puts(m, " dc_aliases");
+       if (cpu_has_ic_fills_f_dc)
+               seq_puts(m, " ic_fills_f_dc");
+       if (cpu_has_pindexed_dcache)
+               seq_puts(m, " pindexed_dcache");
+       if (cpu_has_userlocal)
+               seq_puts(m, " userlocal");
+       if (cpu_has_nofpuex)
+               seq_puts(m, " nofpuex");
+       if (cpu_has_vint)
+               seq_puts(m, " vint");
+       if (cpu_has_veic)
+               seq_puts(m, " veic");
+       if (cpu_has_inclusive_pcaches)
+               seq_puts(m, " inclusive_pcaches");
+       if (cpu_has_perf_cntr_intr_bit)
+               seq_puts(m, " perf_cntr_intr_bit");
+       if (cpu_has_ufr)
+               seq_puts(m, " ufr");
+       if (cpu_has_fre)
+               seq_puts(m, " fre");
+       if (cpu_has_cdmm)
+               seq_puts(m, " cdmm");
+       if (cpu_has_small_pages)
+               seq_puts(m, " small_pages");
+       if (cpu_has_nan_legacy)
+               seq_puts(m, " nan_legacy");
+       if (cpu_has_nan_2008)
+               seq_puts(m, " nan_2008");
+       if (cpu_has_ebase_wg)
+               seq_puts(m, " ebase_wg");
+       if (cpu_has_badinstr)
+               seq_puts(m, " badinstr");
+       if (cpu_has_badinstrp)
+               seq_puts(m, " badinstrp");
+       if (cpu_has_contextconfig)
+               seq_puts(m, " contextconfig");
+       if (cpu_has_perf)
+               seq_puts(m, " perf");
+       if (cpu_has_mac2008_only)
+               seq_puts(m, " mac2008_only");
+       if (cpu_has_ftlbparex)
+               seq_puts(m, " ftlbparex");
+       if (cpu_has_gsexcex)
+               seq_puts(m, " gsexcex");
+       if (cpu_has_shared_ftlb_ram)
+               seq_puts(m, " shared_ftlb_ram");
+       if (cpu_has_shared_ftlb_entries)
+               seq_puts(m, " shared_ftlb_entries");
+       if (cpu_has_mipsmt_pertccounters)
+               seq_puts(m, " mipsmt_pertccounters");
+       if (cpu_has_mmid)
+               seq_puts(m, " mmid");
+       if (cpu_has_mm_sysad)
+               seq_puts(m, " mm_sysad");
+       if (cpu_has_mm_full)
+               seq_puts(m, " mm_full");
+       seq_puts(m, "\n");
+
        seq_printf(m, "shadow register sets\t: %d\n",
                      cpu_data[n].srsets);
        seq_printf(m, "kscratch registers\t: %d\n",