From patchwork Mon Jan 23 22:32:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 9533655 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0D87B6042F for ; Mon, 23 Jan 2017 22:33:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E7E0726530 for ; Mon, 23 Jan 2017 22:33:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DC98027CAF; Mon, 23 Jan 2017 22:33:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00 autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3D67026530 for ; Mon, 23 Jan 2017 22:33:15 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cVnAn-0001cN-Un; Mon, 23 Jan 2017 22:33:13 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cVnAj-0001Ya-It for linux-arm-kernel@lists.infradead.org; Mon, 23 Jan 2017 22:33:11 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7A692C14; Mon, 23 Jan 2017 14:32:47 -0800 (PST) Received: from beelzebub.ast.arm.com (unknown [10.118.96.220]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EFC313F47F; Mon, 23 Jan 2017 14:32:46 -0800 (PST) From: Jeremy Linton To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v14 1/6] arm: arm64: Add routine to determine cpuid of other cpus Date: Mon, 23 Jan 2017 16:32:40 -0600 Message-Id: <1485210765-9422-2-git-send-email-jeremy.linton@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1485210765-9422-1-git-send-email-jeremy.linton@arm.com> References: <1485210765-9422-1-git-send-email-jeremy.linton@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170123_143309_703091_7E55CB5A X-CRM114-Status: UNSURE ( 9.55 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, lorenzo.pieralisi@arm.com, steve.capper@arm.com, mlangsdorf@redhat.com, punit.agrawal@arm.com, will.deacon@arm.com, linux@armlinux.org.uk, linux-acpi@vger.kernel.org, msalter@redhat.com, bamvor.zhangjian@linaro.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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/arm/kernel/setup.c | 2 +- arch/arm64/include/asm/cputype.h | 3 +++ 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h index b62eaeb..a3b6c8b 100644 --- a/arch/arm/include/asm/cputype.h +++ b/arch/arm/include/asm/cputype.h @@ -238,6 +238,10 @@ static inline unsigned int __attribute_const__ read_cpuid_mpidr(void) #define cpu_is_sa1100() (read_cpuid_part() == ARM_CPU_PART_SA1100) #define cpu_is_sa1110() (read_cpuid_part() == ARM_CPU_PART_SA1110) +#define read_specific_cpuid(cpu_num) (is_smp() ? \ + per_cpu_ptr(&cpu_data, cpu_num)->cpuid \ + : read_cpuid_id()) + /* * 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/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 34e3f3c..d443c97 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -1217,7 +1217,7 @@ static int c_show(struct seq_file *m, void *v) * "processor". Give glibc what it expects. */ seq_printf(m, "processor\t: %d\n", i); - cpuid = is_smp() ? per_cpu(cpu_data, i).cpuid : read_cpuid_id(); + cpuid = read_specific_cpuid(i); seq_printf(m, "model name\t: %s rev %d (%s)\n", cpu_name, cpuid & 15, elf_platform); diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 26a68dd..a6d26e1 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -124,6 +124,9 @@ 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