generic: 5.15: move MIPS cpuinfo patch from pending to backport

Move MIPS cpuinfo patch from pending to backport as it got merged
upstream.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

2 files changed, 224 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/330-v5.16-01-MIPS-kernel-proc-add-CPU-option-reporting.patch b/target/linux/generic/backport-5.15/330-v5.16-01-MIPS-kernel-proc-add-CPU-option-reporting.patch
new file mode 100644
index 0000000000..c66a3f11b4
--- /dev/null
+++ b/target/linux/generic/backport-5.15/330-v5.16-01-MIPS-kernel-proc-add-CPU-option-reporting.patch
@@ -0,0 +1,162 @@
+From 626bfa03729959ea9917181fb3d8ffaa1594d02a Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Wed, 13 Oct 2021 22:40:18 -0700
+Subject: [PATCH 1/1] 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 6ce91ba8589a
+  ("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>
+---
+ arch/mips/kernel/proc.c | 122 ++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 122 insertions(+)
+
+--- a/arch/mips/kernel/proc.c
++++ b/arch/mips/kernel/proc.c
+@@ -138,6 +138,128 @@ 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_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",
diff --git a/target/linux/generic/backport-5.15/330-v5.16-02-MIPS-Fix-using-smp_processor_id-in-preemptible-in-sh.patch b/target/linux/generic/backport-5.15/330-v5.16-02-MIPS-Fix-using-smp_processor_id-in-preemptible-in-sh.patch
new file mode 100644
index 0000000000..6caf7d06d4
--- /dev/null
+++ b/target/linux/generic/backport-5.15/330-v5.16-02-MIPS-Fix-using-smp_processor_id-in-preemptible-in-sh.patch
@@ -0,0 +1,62 @@
+From 1cab5bd69eb1f995ced2d7576cb15f8a8941fd85 Mon Sep 17 00:00:00 2001
+From: Tiezhu Yang <yangtiezhu@loongson.cn>
+Date: Thu, 25 Nov 2021 19:39:32 +0800
+Subject: [PATCH 1/1] MIPS: Fix using smp_processor_id() in preemptible in
+ show_cpuinfo()
+
+There exists the following issue under DEBUG_PREEMPT:
+
+ BUG: using smp_processor_id() in preemptible [00000000] code: systemd/1
+ caller is show_cpuinfo+0x460/0xea0
+ ...
+ Call Trace:
+ [<ffffffff8020f0dc>] show_stack+0x94/0x128
+ [<ffffffff80e6cab4>] dump_stack_lvl+0x94/0xd8
+ [<ffffffff80e74c5c>] check_preemption_disabled+0x104/0x110
+ [<ffffffff802209c8>] show_cpuinfo+0x460/0xea0
+ [<ffffffff80539d54>] seq_read_iter+0xfc/0x4f8
+ [<ffffffff804fcc10>] new_sync_read+0x110/0x1b8
+ [<ffffffff804ff57c>] vfs_read+0x1b4/0x1d0
+ [<ffffffff804ffb18>] ksys_read+0xd0/0x110
+ [<ffffffff8021c090>] syscall_common+0x34/0x58
+
+We can see the following call trace:
+ show_cpuinfo()
+   cpu_has_fpu
+     current_cpu_data
+       smp_processor_id()
+
+ $ addr2line -f -e vmlinux 0xffffffff802209c8
+ show_cpuinfo
+ arch/mips/kernel/proc.c:188
+
+ $ head -188 arch/mips/kernel/proc.c | tail -1
+	 if (cpu_has_fpu)
+
+ arch/mips/include/asm/cpu-features.h
+ #  define cpu_has_fpu		(current_cpu_data.options & MIPS_CPU_FPU)
+
+ arch/mips/include/asm/cpu-info.h
+ #define current_cpu_data cpu_data[smp_processor_id()]
+
+Based on the above analysis, fix the issue by using raw_cpu_has_fpu
+which calls raw_smp_processor_id() in show_cpuinfo().
+
+Fixes: 626bfa037299 ("MIPS: kernel: proc: add CPU option reporting")
+Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
+Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+---
+ arch/mips/kernel/proc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/mips/kernel/proc.c
++++ b/arch/mips/kernel/proc.c
+@@ -166,7 +166,7 @@ static int show_cpuinfo(struct seq_file
+ 		seq_puts(m, " tx39_cache");
+ 	if (cpu_has_octeon_cache)
+ 		seq_puts(m, " octeon_cache");
+-	if (cpu_has_fpu)
++	if (raw_cpu_has_fpu)
+ 		seq_puts(m, " fpu");
+ 	if (cpu_has_32fpr)
+ 		seq_puts(m, " 32fpr");