Messages in this thread Patch in this message | | | From | Jiaxun Yang <> | Subject | [PATCH for-5.19 2/2] loongarch: Mask out higher bits for get_csr_cpuid | Date | Sat, 4 Jun 2022 13:40:52 +0100 |
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Only low 9 bits of CPUID CSR represents coreid, higher bits are marked as reserved. In case Loongson may define higher bits in future, just mask them out for get_csr_cpuid.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> --- arch/loongarch/include/asm/loongarch.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h index 3ba4f7e87cd2..7f3933f747f9 100644 --- a/arch/loongarch/include/asm/loongarch.h +++ b/arch/loongarch/include/asm/loongarch.h @@ -1200,7 +1200,7 @@ static inline u64 drdtime(void) static inline unsigned int get_csr_cpuid(void) { - return csr_read32(LOONGARCH_CSR_CPUID); + return csr_read32(LOONGARCH_CSR_CPUID) & CSR_CPUID_COREID; } static inline void csr_any_send(unsigned int addr, unsigned int data, -- 2.25.1
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