diff options
| author | Qi Hu <huqi@loongson.cn> | 2022-07-06 13:29:37 +0200 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-07-07 11:41:01 +0200 |
| commit | 112380996ac22e428264cd7186722e784db887e4 (patch) | |
| tree | 3210bc5b02e47af73909cbdbe3fa9ce2ce2d6ce4 /arch/loongarch/kernel/asm-offsets.c | |
| parent | LoongArch: Drop these obsolete selects in Kconfig (diff) | |
| download | linux-112380996ac22e428264cd7186722e784db887e4.tar.xz linux-112380996ac22e428264cd7186722e784db887e4.zip | |
LoongArch: Remove obsolete mentions of vcsr
The `vcsr` only exists in the old hardware design, it isn't used in any
shipped hardware from Loongson-3A5000 on. Both scalar FP and LSX/LASX
instructions use the `fcsr` as their control and status registers now.
For example, the RM control bit in fcsr0 is shared by FP, LSX and LASX
instructions.
Particularly, fcsr16 to fcsr31 are reserved for LSX/LASX now, access to
these registers has no visible effect if LSX/LASX is enabled, and will
cause SXD/ASXD exceptions if LSX/LASX is not enabled.
So, mentions of vcsr are obsolete in the first place (it was just used
for debugging), let's remove them.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Qi Hu <huqi@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/kernel/asm-offsets.c')
| -rw-r--r-- | arch/loongarch/kernel/asm-offsets.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/asm-offsets.c b/arch/loongarch/kernel/asm-offsets.c index bfb65eb2844f..20cd9e16a95a 100644 --- a/arch/loongarch/kernel/asm-offsets.c +++ b/arch/loongarch/kernel/asm-offsets.c @@ -166,7 +166,6 @@ void output_thread_fpu_defines(void) OFFSET(THREAD_FCSR, loongarch_fpu, fcsr); OFFSET(THREAD_FCC, loongarch_fpu, fcc); - OFFSET(THREAD_VCSR, loongarch_fpu, vcsr); BLANK(); } |