Commit ad82eef3 authored by Tiezhu Yang's avatar Tiezhu Yang Committed by Huacai Chen
Browse files

LoongArch: Fix wrong fpu version 

According to the configuration information accessible by the CPUCFG
instruction in LoongArch Reference Manual [1], FP_ver is stored in
bit [5: 3] of CPUCFG2, the current code to get fpu version is wrong,
use CPUCFG2_FPVERS to fix it.

[1] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html



Fixes: 628c3bb4 ("LoongArch: Add boot and setup routines")
Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 26808ceb

arch/loongarch/kernel/cpu-probe.c

+1 −1
Original line number Diff line number Diff line
@@ -263,7 +263,7 @@ void cpu_probe(void) 


	c->cputype	= CPU_UNKNOWN;

	c->processor_id = read_cpucfg(LOONGARCH_CPUCFG0);

	c->fpu_vers	= (read_cpucfg(LOONGARCH_CPUCFG2) >> 3) & 0x3;

	c->fpu_vers     = (read_cpucfg(LOONGARCH_CPUCFG2) & CPUCFG2_FPVERS) >> 3;



	c->fpu_csr0	= FPU_CSR_RN;

	c->fpu_mask	= FPU_CSR_RSVD;