On Thu, Oct 10, 2019 at 10:36:42AM +0200, Greg Kroah-Hartman wrote:
> From: Jiaxun Yang <jiaxun.y...@flygoat.com>
>
> commit d2f965549006acb865c4638f1f030ebcefdc71f6 upstream.
>
> 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.y...@flygoat.com>
> Cc: Huacai Chen <che...@lemote.com>
> Cc: Yunqiang Su <y...@wavecomp.com>
> Cc: sta...@vger.kernel.org # v4.14+
> Signed-off-by: Paul Burton <paul.bur...@mips.com>
> Cc: linux-m...@vger.kernel.org
> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
>
> ---
> arch/mips/include/asm/cpu-features.h | 16 ++++++++++++++++
> arch/mips/include/asm/cpu.h | 4 ++++
> arch/mips/kernel/cpu-probe.c | 6 ++++++
> arch/mips/kernel/proc.c | 4 ++++
> 4 files changed, 30 insertions(+)
>
> --- a/arch/mips/include/asm/cpu-features.h
> +++ b/arch/mips/include/asm/cpu-features.h
> @@ -348,6 +348,22 @@
> #define cpu_has_dsp3 (cpu_data[0].ases & 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 (cpu_data[0].ases & MIPS_ASE_MIPSMT)
> #endif
> --- a/arch/mips/include/asm/cpu.h
> +++ b/arch/mips/include/asm/cpu.h
> @@ -433,5 +433,9 @@ 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 */
> --- a/arch/mips/kernel/cpu-probe.c
> +++ b/arch/mips/kernel/cpu-probe.c
> @@ -1478,6 +1478,8 @@ static inline void cpu_probe_legacy(stru
> __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:
> @@ -1485,6 +1487,8 @@ static inline void cpu_probe_legacy(stru
> __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;
> }
>
> @@ -1845,6 +1849,8 @@ static inline void cpu_probe_loongson(st
> 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!");
> --- a/arch/mips/kernel/proc.c
> +++ b/arch/mips/kernel/proc.c
> @@ -124,6 +124,10 @@ static int show_cpuinfo(struct seq_file
> 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) {
>
>
This patch is causing build errors in 4.14, so I am dropping it. Please
provide a working version if you all want to see it in here.
thanks,
greg k-h
