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MIPS: Treat Loongson Extensions as ASEs

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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@flygoat.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Yunqiang Su <ysu@wavecomp.com>
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
This commit is contained in:
Jiaxun Yang
2019-05-29 16:42:59 +08:00
committed by Paul Burton
parent 322e577b02
commit d2f9655490
4 changed files with 30 additions and 0 deletions
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16
arch/mips/include/asm/cpu-features.h
View File

@@ -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

4
arch/mips/include/asm/cpu.h
View File

@@ -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 */