From patchwork Fri Feb 3 13:50:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Morse X-Patchwork-Id: 13127643 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B4BACC61DA4 for ; Fri, 3 Feb 2023 14:07:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zOZJhtAd2WfoenwKWkqU11rur7ofLtECS2fX/zPvfNI=; b=36bDdzsSk5C0n4 Wpi2OkEEIWBE5rf2qxlnpCStCkBWoxs9SdshJdx/S/y2+6awBb2PBJaHfUTb8lc8yQ8hQSRlaltGP PPX78MPzroQRgdOIZ3koz7sJluIfQe7all2Vt9D2jzA+SzticlKov/ExjFmEhIQgMG7xLaLa/2vOX dK/My3swNHJw9S7zp2jgBfdQ8m2JWLW/wrxFdMQhwD72XHAqnRf2SlfMhFphyP3OgsGLTztw3LcZv 7AMQ7roGyNqsiiI2/veheJ53Zp5X1EvP35yoN4vIVxB/tBSLErC3j0s5FhHgj3zreAYozFweG5Aeo JBeJxlW6YvRh8qMCqMjw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pNwgo-002F0B-1O; Fri, 03 Feb 2023 14:05:19 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pNwUT-002ACI-5s for linux-arm-kernel@lists.infradead.org; Fri, 03 Feb 2023 13:52:35 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 282811FB; Fri, 3 Feb 2023 05:53:13 -0800 (PST) Received: from eglon.cambridge.arm.com (eglon.cambridge.arm.com [10.1.196.177]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5A6A23F71E; Fri, 3 Feb 2023 05:52:27 -0800 (PST) From: James Morse To: linux-pm@vger.kernel.org, loongarch@lists.linux.dev, kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org Cc: Marc Zyngier , Thomas Gleixner , Lorenzo Pieralisi , Mark Rutland , Sudeep Holla , Borislav Petkov , H Peter Anvin , Dave Hansen , Ingo Molnar , Will Deacon , Catalin Marinas , Huacai Chen , James Morse , Suzuki K Poulose , Oliver Upton , Len Brown , Rafael Wysocki , WANG Xuerui , Salil Mehta , Russell King , Jean-Philippe Brucker Subject: [RFC PATCH 09/32] LoongArch: Switch over to GENERIC_CPU_DEVICES Date: Fri, 3 Feb 2023 13:50:20 +0000 Message-Id: <20230203135043.409192-10-james.morse@arm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230203135043.409192-1-james.morse@arm.com> References: <20230203135043.409192-1-james.morse@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230203_055233_361434_0A375302 X-CRM114-Status: GOOD ( 13.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Now that GENERIC_CPU_DEVICES calls arch_register_cpu(), which can be overridden by the arch code, switch over to this to allow common code to choose when the register_cpu() call is made. This allows topology_init() to be removed. This is an intermediate step to the logic being moved to drivers/acpi, where GENERIC_CPU_DEVICES will do the work when booting with acpi=off. Signed-off-by: James Morse --- arch/loongarch/Kconfig | 1 + arch/loongarch/kernel/topology.c | 22 +--------------------- 2 files changed, 2 insertions(+), 21 deletions(-) diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 075aa50e5d5f..53f6feba0008 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -64,6 +64,7 @@ config LOONGARCH select GENERIC_CLOCKEVENTS select GENERIC_CMOS_UPDATE select GENERIC_CPU_AUTOPROBE + select GENERIC_CPU_DEVICES select GENERIC_ENTRY select GENERIC_GETTIMEOFDAY select GENERIC_IOREMAP if !ARCH_IOREMAP diff --git a/arch/loongarch/kernel/topology.c b/arch/loongarch/kernel/topology.c index caa7cd859078..a86d51269b09 100644 --- a/arch/loongarch/kernel/topology.c +++ b/arch/loongarch/kernel/topology.c @@ -7,15 +7,13 @@ #include #include -static DEFINE_PER_CPU(struct cpu, cpu_devices); - #ifdef CONFIG_HOTPLUG_CPU int arch_register_cpu(int cpu) { int ret; struct cpu *c = &per_cpu(cpu_devices, cpu); - c->hotpluggable = 1; + c->hotpluggable = !io_master(cpu); ret = register_cpu(c, cpu); if (ret < 0) pr_warn("register_cpu %d failed (%d)\n", cpu, ret); @@ -33,21 +31,3 @@ void arch_unregister_cpu(int cpu) } EXPORT_SYMBOL(arch_unregister_cpu); #endif - -static int __init topology_init(void) -{ - int i, ret; - - for_each_present_cpu(i) { - struct cpu *c = &per_cpu(cpu_devices, i); - - c->hotpluggable = !io_master(i); - ret = register_cpu(c, i); - if (ret < 0) - pr_warn("topology_init: register_cpu %d failed (%d)\n", i, ret); - } - - return 0; -} - -subsys_initcall(topology_init);