From: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
[ Upstream commit d2f965549006acb865c4638f1f030ebcefdc71f6 ]
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
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/mips/include/asm/cpu-features.h | 8 ++++++++
arch/mips/include/asm/cpu.h | 2 ++
arch/mips/kernel/cpu-probe.c | 2 ++
arch/mips/kernel/proc.c | 2 ++
4 files changed, 14 insertions(+)
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h
index d1e04c943f5f7..ff60510357f63 100644
--- a/arch/mips/include/asm/cpu-features.h
+++ b/arch/mips/include/asm/cpu-features.h
@@ -307,6 +307,14 @@
#define cpu_has_dsp2 (cpu_data[0].ases & MIPS_ASE_DSP2P)
#endif
+#ifndef cpu_has_loongson_mmi
+#define cpu_has_loongson_mmi __ase(MIPS_ASE_LOONGSON_MMI)
+#endif
+
+#ifndef cpu_has_loongson_ext
+#define cpu_has_loongson_ext __ase(MIPS_ASE_LOONGSON_EXT)
+#endif
+
#ifndef cpu_has_mipsmt
#define cpu_has_mipsmt (cpu_data[0].ases & MIPS_ASE_MIPSMT)
#endif
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index 82ad15f110492..08cb7a5661d07 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -399,5 +399,7 @@ enum cpu_type_enum {
#define MIPS_ASE_DSP2P 0x00000040 /* Signal Processing ASE Rev 2 */
#define MIPS_ASE_VZ 0x00000080 /* Virtualization ASE */
#define MIPS_ASE_MSA 0x00000100 /* MIPS SIMD Architecture */
+#define MIPS_ASE_LOONGSON_MMI 0x00000800 /* Loongson MultiMedia extensions Instructions */
+#define MIPS_ASE_LOONGSON_EXT 0x00002000 /* Loongson EXTensions */
#endif /* _ASM_CPU_H */
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 6b9064499bd3d..ee71bda53d4e6 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1016,6 +1016,7 @@ 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_EXT);
break;
case PRID_REV_LOONGSON3B_R1:
case PRID_REV_LOONGSON3B_R2:
@@ -1023,6 +1024,7 @@ 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_EXT);
break;
}
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index f1fab6ff53e63..33c6cdff2331e 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -121,6 +121,8 @@ 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_ext) seq_printf(m, "%s", " loongson-ext");
seq_printf(m, "\n");
if (cpu_has_mmips) {
--
2.20.1
