From mboxrd@z Thu Jan 1 00:00:00 1970 From: jeremy.linton@arm.com (Jeremy Linton) Date: Tue, 23 Aug 2016 15:47:57 -0500 Subject: [PATCH v7 6/9] arm: arm64: Add routine to determine cpuid of other cpus In-Reply-To: <1471985280-2243-1-git-send-email-jeremy.linton@arm.com> References: <1471985280-2243-1-git-send-email-jeremy.linton@arm.com> Message-ID: <1471985280-2243-7-git-send-email-jeremy.linton@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org It is helpful if we can read the cpuid/midr of other CPUs in the system independent of arm/arm64. Signed-off-by: Jeremy Linton --- arch/arm/include/asm/cputype.h | 2 ++ arch/arm64/include/asm/cputype.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index 1ee94c7..d5900a2 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -208,6 +208,8 @@ static inline unsigned int __attribute_const__ read_cpuid_mpidr(void) return read_cpuid(CPUID_MPIDR); } +#define read_specific_cpuid(cpu_num) per_cpu_ptr(&cpu_data, cpu_num)->cpuid + /* * Intel's XScale3 core supports some v6 features (supersections, L2) * but advertises itself as v5 as it does not support the v6 ISA. For diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 9d9fd4b..beb95dc 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -128,6 +128,9 @@ static inline u32 __attribute_const__ read_cpuid_cachetype(void) { return read_cpuid(CTR_EL0); } + +#define read_specific_cpuid(cpu_num) per_cpu_ptr(&cpu_data, cpu_num)->reg_midr + #endif /* __ASSEMBLY__ */ #endif -- 2.5.5