kernel: MIPS: Add CPU option reporting to /proc/cpuinfo

Many MIPS CPUs have optional CPU features which are not activates for
all CPU cores. Print the CPU options which are implemented in the core
in /proc/cpuinfo. This makes it possible to see what 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>

1 files changed, 142 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.19/309-MIPS-Add-CPU-option-reporting-to-proc-cpuinfo.patch b/target/linux/generic/pending-4.19/309-MIPS-Add-CPU-option-reporting-to-proc-cpuinfo.patch
new file mode 100644
index 0000000000..303654a60a
--- /dev/null
+++ b/target/linux/generic/pending-4.19/309-MIPS-Add-CPU-option-reporting-to-proc-cpuinfo.patch
@@ -0,0 +1,142 @@
+From 87ec87c2ad615c1a177cd08ef5fa29fc739f6e50 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 23 Dec 2018 18:06:53 +0100
+Subject: [PATCH] MIPS: Add CPU option reporting to /proc/cpuinfo
+
+Many MIPS CPUs have optional CPU features which are not activates for
+all CPU cores. Print the CPU options which are implemented in the core
+in /proc/cpuinfo. This makes it possible to see what 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>
+---
+ arch/mips/kernel/proc.c | 116 ++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 116 insertions(+)
+
+--- a/arch/mips/kernel/proc.c
++++ b/arch/mips/kernel/proc.c
+@@ -130,6 +130,122 @@ static int show_cpuinfo(struct seq_file
+ 		seq_printf(m, "micromips kernel\t: %s\n",
+ 		      (read_c0_config3() & MIPS_CONF3_ISA_OE) ?  "yes" : "no");
+ 	}
++
++	seq_printf(m, "Options implemented\t:");
++	if (cpu_has_tlb)
++		seq_printf(m, "%s", " tlb");
++	if (cpu_has_ftlb)
++		seq_printf(m, "%s", " ftlb");
++	if (cpu_has_tlbinv)
++		seq_printf(m, "%s", " tlbinv");
++	if (cpu_has_segments)
++		seq_printf(m, "%s", " segments");
++	if (cpu_has_rixiex)
++		seq_printf(m, "%s", " rixiex");
++	if (cpu_has_ldpte)
++		seq_printf(m, "%s", " ldpte");
++	if (cpu_has_maar)
++		seq_printf(m, "%s", " maar");
++	if (cpu_has_rw_llb)
++		seq_printf(m, "%s", " rw_llb");
++	if (cpu_has_4kex)
++		seq_printf(m, "%s", " 4kex");
++	if (cpu_has_3k_cache)
++		seq_printf(m, "%s", " 3k_cache");
++	if (cpu_has_4k_cache)
++		seq_printf(m, "%s", " 4k_cache");
++	if (cpu_has_6k_cache)
++		seq_printf(m, "%s", " 6k_cache");
++	if (cpu_has_8k_cache)
++		seq_printf(m, "%s", " 8k_cache");
++	if (cpu_has_tx39_cache)
++		seq_printf(m, "%s", " tx39_cache");
++	if (cpu_has_octeon_cache)
++		seq_printf(m, "%s", " octeon_cache");
++	if (cpu_has_fpu)
++		seq_printf(m, "%s", " fpu");
++	if (cpu_has_32fpr)
++		seq_printf(m, "%s", " 32fpr");
++	if (cpu_has_cache_cdex_p)
++		seq_printf(m, "%s", " cache_cdex_p");
++	if (cpu_has_cache_cdex_s)
++		seq_printf(m, "%s", " cache_cdex_s");
++	if (cpu_has_prefetch)
++		seq_printf(m, "%s", " prefetch");
++	if (cpu_has_mcheck)
++		seq_printf(m, "%s", " mcheck");
++	if (cpu_has_ejtag)
++		seq_printf(m, "%s", " ejtag");
++	if (cpu_has_llsc)
++		seq_printf(m, "%s", " llsc");
++	if (cpu_has_bp_ghist)
++		seq_printf(m, "%s", " bp_ghist");
++	if (cpu_has_guestctl0ext)
++		seq_printf(m, "%s", " guestctl0ext");
++	if (cpu_has_guestctl1)
++		seq_printf(m, "%s", " guestctl1");
++	if (cpu_has_guestctl2)
++		seq_printf(m, "%s", " guestctl2");
++	if (cpu_has_guestid)
++		seq_printf(m, "%s", " guestid");
++	if (cpu_has_drg)
++		seq_printf(m, "%s", " drg");
++	if (cpu_has_rixi)
++		seq_printf(m, "%s", " rixi");
++	if (cpu_has_lpa)
++		seq_printf(m, "%s", " lpa");
++	if (cpu_has_mvh)
++		seq_printf(m, "%s", " mvh");
++	if (cpu_has_vtag_icache)
++		seq_printf(m, "%s", " vtag_icache");
++	if (cpu_has_dc_aliases)
++		seq_printf(m, "%s", " dc_aliases");
++	if (cpu_has_ic_fills_f_dc)
++		seq_printf(m, "%s", " ic_fills_f_dc");
++	if (cpu_has_pindexed_dcache)
++		seq_printf(m, "%s", " pindexed_dcache");
++	if (cpu_has_userlocal)
++		seq_printf(m, "%s", " userlocal");
++	if (cpu_has_nofpuex)
++		seq_printf(m, "%s", " nofpuex");
++	if (cpu_has_vint)
++		seq_printf(m, "%s", " vint");
++	if (cpu_has_veic)
++		seq_printf(m, "%s", " veic");
++	if (cpu_has_inclusive_pcaches)
++		seq_printf(m, "%s", " inclusive_pcaches");
++	if (cpu_has_perf_cntr_intr_bit)
++		seq_printf(m, "%s", " perf_cntr_intr_bit");
++	if (cpu_has_ufr)
++		seq_printf(m, "%s", " ufr");
++	if (cpu_has_fre)
++		seq_printf(m, "%s", " fre");
++	if (cpu_has_cdmm)
++		seq_printf(m, "%s", " cdmm");
++	if (cpu_has_small_pages)
++		seq_printf(m, "%s", " small_pages");
++	if (cpu_has_nan_legacy)
++		seq_printf(m, "%s", " nan_legacy");
++	if (cpu_has_nan_2008)
++		seq_printf(m, "%s", " nan_2008");
++	if (cpu_has_ebase_wg)
++		seq_printf(m, "%s", " ebase_wg");
++	if (cpu_has_badinstr)
++		seq_printf(m, "%s", " badinstr");
++	if (cpu_has_badinstrp)
++		seq_printf(m, "%s", " badinstrp");
++	if (cpu_has_contextconfig)
++		seq_printf(m, "%s", " contextconfig");
++	if (cpu_has_perf)
++		seq_printf(m, "%s", " perf");
++	if (cpu_has_shared_ftlb_ram)
++		seq_printf(m, "%s", " shared_ftlb_ram");
++	if (cpu_has_shared_ftlb_entries)
++		seq_printf(m, "%s", " shared_ftlb_entries");
++	if (cpu_has_mipsmt_pertccounters)
++		seq_printf(m, "%s", " mipsmt_pertccounters");
++	seq_printf(m, "\n");
++
+ 	seq_printf(m, "shadow register sets\t: %d\n",
+ 		      cpu_data[n].srsets);
+ 	seq_printf(m, "kscratch registers\t: %d\n",