The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From d2f965549006acb865c4638f1f030ebcefdc71f6 Mon Sep 17 00:00:00 2001
From: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Date: Wed, 29 May 2019 16:42:59 +0800
Subject: [PATCH] MIPS: Treat Loongson Extensions as ASEs
Recently, binutils had split Loongson-3 Extensions into four ASEs:
MMI, CAM, EXT, EXT2. This patch do the samething in kernel and expose
them in cpuinfo so applications can probe supported ASEs at runtime.
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Cc: Huacai Chen <chenhc@xxxxxxxxxx>
Cc: Yunqiang Su <ysu@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.14+
Signed-off-by: Paul Burton <paul.burton@xxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxxx
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h
index 6998a9796499..4e2bea8875f5 100644
--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -397,6 +397,22 @@
#define cpu_has_dsp3 __ase(MIPS_ASE_DSP3)
#endif
+#ifndef cpu_has_loongson_mmi
+#define cpu_has_loongson_mmi __ase(MIPS_ASE_LOONGSON_MMI)
+#endif
+
+#ifndef cpu_has_loongson_cam
+#define cpu_has_loongson_cam __ase(MIPS_ASE_LOONGSON_CAM)
+#endif
+
+#ifndef cpu_has_loongson_ext
+#define cpu_has_loongson_ext __ase(MIPS_ASE_LOONGSON_EXT)
+#endif
+
+#ifndef cpu_has_loongson_ext2
+#define cpu_has_loongson_ext2 __ase(MIPS_ASE_LOONGSON_EXT2)
+#endif
+
#ifndef cpu_has_mipsmt
#define cpu_has_mipsmt __isa_lt_and_ase(6, MIPS_ASE_MIPSMT)
#endif
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 6826f0a657fb..7fddcb8350c6 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -428,5 +428,9 @@ enum cpu_type_enum {
#define MIPS_ASE_MSA 0x00000100 /* MIPS SIMD Architecture */
#define MIPS_ASE_DSP3 0x00000200 /* Signal Processing ASE Rev 3*/
#define MIPS_ASE_MIPS16E2 0x00000400 /* MIPS16e2 */
+#define MIPS_ASE_LOONGSON_MMI 0x00000800 /* Loongson MultiMedia extensions Instructions */
+#define MIPS_ASE_LOONGSON_CAM 0x00001000 /* Loongson CAM */
+#define MIPS_ASE_LOONGSON_EXT 0x00002000 /* Loongson EXTensions */
+#define MIPS_ASE_LOONGSON_EXT2 0x00004000 /* Loongson EXTensions R2 */
#endif /* _ASM_CPU_H */
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 93b46be14688..c2eb392597bf 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1547,6 +1547,8 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
__cpu_name[cpu] = "ICT Loongson-3";
set_elf_platform(cpu, "loongson3a");
set_isa(c, MIPS_CPU_ISA_M64R1);
+ c->ases |= (MIPS_ASE_LOONGSON_MMI | MIPS_ASE_LOONGSON_CAM |
+ MIPS_ASE_LOONGSON_EXT);
break;
case PRID_REV_LOONGSON3B_R1:
case PRID_REV_LOONGSON3B_R2:
@@ -1554,6 +1556,8 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
__cpu_name[cpu] = "ICT Loongson-3";
set_elf_platform(cpu, "loongson3b");
set_isa(c, MIPS_CPU_ISA_M64R1);
+ c->ases |= (MIPS_ASE_LOONGSON_MMI | MIPS_ASE_LOONGSON_CAM |
+ MIPS_ASE_LOONGSON_EXT);
break;
}
@@ -1920,6 +1924,8 @@ static inline void cpu_probe_loongson(struct cpuinfo_mips *c, unsigned int cpu)
decode_configs(c);
c->options |= MIPS_CPU_FTLB | MIPS_CPU_TLBINV | MIPS_CPU_LDPTE;
c->writecombine = _CACHE_UNCACHED_ACCELERATED;
+ c->ases |= (MIPS_ASE_LOONGSON_MMI | MIPS_ASE_LOONGSON_CAM |
+ MIPS_ASE_LOONGSON_EXT | MIPS_ASE_LOONGSON_EXT2);
break;
default:
panic("Unknown Loongson Processor ID!");
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index b2de408a259e..f8d36710cd58 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -124,6 +124,10 @@ static int show_cpuinfo(struct seq_file *m, void *v)
if (cpu_has_eva) seq_printf(m, "%s", " eva");
if (cpu_has_htw) seq_printf(m, "%s", " htw");
if (cpu_has_xpa) seq_printf(m, "%s", " xpa");
+ if (cpu_has_loongson_mmi) seq_printf(m, "%s", " loongson-mmi");
+ if (cpu_has_loongson_cam) seq_printf(m, "%s", " loongson-cam");
+ if (cpu_has_loongson_ext) seq_printf(m, "%s", " loongson-ext");
+ if (cpu_has_loongson_ext2) seq_printf(m, "%s", " loongson-ext2");
seq_printf(m, "\n");
if (cpu_has_mmips) {
