target/loongarch: fix ASXE flag conflict

[PATCH] target/loongarch: fix ASXE flag conflict

Posted by Jiajie Chen 7 months ago

HW_FLAGS_EUEN_ASXE acccidentally conflicts with HW_FLAGS_CRMD_PG,
enabling LASX instructions even when CSR_EUEN.ASXE=0.

Closes: https://gitlab.com/qemu-project/qemu/-/issues/1907
Signed-off-by: Jiajie Chen <c@jia.je>
---
 target/loongarch/cpu.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
index f125a8e49b..79ad79a289 100644
--- a/target/loongarch/cpu.h
+++ b/target/loongarch/cpu.h
@@ -462,7 +462,7 @@ static inline void set_pc(CPULoongArchState *env, uint64_t value)
 #define HW_FLAGS_CRMD_PG    R_CSR_CRMD_PG_MASK   /* 0x10 */
 #define HW_FLAGS_EUEN_FPE   0x04
 #define HW_FLAGS_EUEN_SXE   0x08
-#define HW_FLAGS_EUEN_ASXE  0x10
+#define HW_FLAGS_EUEN_ASXE  0x40
 #define HW_FLAGS_VA32       0x20
 
 static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, vaddr *pc,
-- 
2.41.0

Re: [PATCH] target/loongarch: fix ASXE flag conflict

Posted by Richard Henderson 7 months ago

On 9/30/23 04:28, Jiajie Chen wrote:
> HW_FLAGS_EUEN_ASXE acccidentally conflicts with HW_FLAGS_CRMD_PG,
> enabling LASX instructions even when CSR_EUEN.ASXE=0.
> 
> Closes: https://gitlab.com/qemu-project/qemu/-/issues/1907
> Signed-off-by: Jiajie Chen <c@jia.je>
> ---
>   target/loongarch/cpu.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
> index f125a8e49b..79ad79a289 100644
> --- a/target/loongarch/cpu.h
> +++ b/target/loongarch/cpu.h
> @@ -462,7 +462,7 @@ static inline void set_pc(CPULoongArchState *env, uint64_t value)
>   #define HW_FLAGS_CRMD_PG    R_CSR_CRMD_PG_MASK   /* 0x10 */
>   #define HW_FLAGS_EUEN_FPE   0x04
>   #define HW_FLAGS_EUEN_SXE   0x08
> -#define HW_FLAGS_EUEN_ASXE  0x10
> +#define HW_FLAGS_EUEN_ASXE  0x40
>   #define HW_FLAGS_VA32       0x20
>   
>   static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, vaddr *pc,

Better to put all defines in bit order, otherwise it will be easy to make the same mistake 
again.

With that,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~

Re: [PATCH] target/loongarch: fix ASXE flag conflict

Posted by gaosong 6 months, 3 weeks ago

在 2023/9/30 下午11:46, Richard Henderson 写道:
> On 9/30/23 04:28, Jiajie Chen wrote:
>> HW_FLAGS_EUEN_ASXE acccidentally conflicts with HW_FLAGS_CRMD_PG,
>> enabling LASX instructions even when CSR_EUEN.ASXE=0.
>>
>> Closes: https://gitlab.com/qemu-project/qemu/-/issues/1907 >> Signed-off-by: Jiajie Chen <c@jia.je>
>> ---
>>   target/loongarch/cpu.h | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h
>> index f125a8e49b..79ad79a289 100644
>> --- a/target/loongarch/cpu.h
>> +++ b/target/loongarch/cpu.h
>> @@ -462,7 +462,7 @@ static inline void set_pc(CPULoongArchState *env, 
>> uint64_t value)
>>   #define HW_FLAGS_CRMD_PG    R_CSR_CRMD_PG_MASK   /* 0x10 */
>>   #define HW_FLAGS_EUEN_FPE   0x04
>>   #define HW_FLAGS_EUEN_SXE   0x08
>> -#define HW_FLAGS_EUEN_ASXE  0x10
>> +#define HW_FLAGS_EUEN_ASXE  0x40
>>   #define HW_FLAGS_VA32       0x20
>>   static inline void cpu_get_tb_cpu_state(CPULoongArchState *env, 
>> vaddr *pc,
> 
> Better to put all defines in bit order, otherwise it will be easy to 
> make the same mistake again.
>  > With that,
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> 
> 
> r
Reviewed-by: Song Gao <gaosong@loongson.cn>

Thanks.
Song Gao