Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965742AbcDLUW0 (ORCPT ); Tue, 12 Apr 2016 16:22:26 -0400 Received: from foss.arm.com ([217.140.101.70]:58155 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965771AbcDLUVj (ORCPT ); Tue, 12 Apr 2016 16:21:39 -0400 From: Jeremy Linton To: linux-kernel@vger.kernel.org Cc: will.deacon@arm.com, mark.rutland@arm.com, peterz@infradead.org, mingo@redhat.com, catalin.marinas@arm.com, msalter@redhat.com, timur@codeaurora.org, nleeder@codeaurora.org, agustinv@codeaurora.org, sfr@canb.auug.org.au, jan.glauber@gmail.com, Jeremy Linton Subject: [PATCH 4/6] arm: arm64: Add routine to determine cpuid of other cpus Date: Tue, 12 Apr 2016 15:21:09 -0500 Message-Id: <1460492471-15527-5-git-send-email-jeremy.linton@arm.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1460492471-15527-1-git-send-email-jeremy.linton@arm.com> References: <1460492471-15527-1-git-send-email-jeremy.linton@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1258 Lines: 40 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 | 4 ++++ arch/arm64/include/asm/cputype.h | 3 +++ 2 files changed, 7 insertions(+) diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index b23c6c8..274baf4 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -208,6 +208,10 @@ 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 87e1985..76423a7 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -126,6 +126,9 @@ 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 -- 2.4.3