From patchwork Wed Dec 13 12:49:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13490914 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 118B5C4167D for ; Wed, 13 Dec 2023 12:50:47 +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:Date:Message-Id:MIME-Version:Subject:Cc :To:From:References:In-Reply-To:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QuyeSYiZJ0491NwnoZ5m4IE1pyIPtbl5fCU7wtXrZ7M=; b=2/+R5j6SuOb8l2 X/oeCl4TKGmGwX3nlbLNIhJpOsTagEFsFVRfuxRMXmyU+XSZrODILRMcFol4Fo4E4zlKuPD/WWnlh tz9O7JbbciR4Q0tiCXd0PKrXFmFaWAhd9JDP369Z4N+qTApNmM+Hr+qFsUVUCg3W3xREM1J+ibsTc Y/LHfaLt5kJ6Q5HBn5KpmTU83X9iaIRYk21K8oYET6671Z+GFyo7Pd7c2LzFEuYdc/nW2QIdCnpFw ls1PX9Yf3+4tbAeK3WBUdMiZTiIxxz3Brq46hH0ddQB0hosxRv7KR5U38ATo/QJc2ZZFHsAeOYM9o 8q4eJ/kN47jbNz0jLA1w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rDOgn-00EeQi-2o; Wed, 13 Dec 2023 12:50:13 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rDOgV-00Ee8d-22; Wed, 13 Dec 2023 12:49:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=kQ4xjAWUxEG0ANx7LMdmdHmPUnFC4tC8apeLWjcG8Og=; b=X90FTAwQnBfHmSIKYLsWfRlpia 375dpkt1T6mkAwKyEadpQymyIe0dg3/p2GwJurKcYd8p3XZRGklvmexrzgscGSrA+E2Yv6aoT86MB ijJOedBgttvzTKBfT9eUkiHEXrz2WuPlFfeI4lj+ac0nHIA6yBoKCgnau1V8tzQjrNKo+vgA5IvnG HYzMibJAtMCmVnc6CLNbKTEpSs0Y0S0suWGF9Ss1Gsl3tCiP/+CHBou3NEzC+Zl6kwj+tV2mTQjT5 04I/JuGQif9ZoTv4TXeya3FEre5X/d4oNidSnw0HnoEtJPLc0iw3ZdEBkG4oHPQUXpWCCbPO2kXKc nDBjPYQw==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:34582 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1rDOgL-0008E5-0Y; Wed, 13 Dec 2023 12:49:45 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1rDOgN-00DvkE-D8; Wed, 13 Dec 2023 12:49:47 +0000 In-Reply-To: References: From: Russell King (Oracle) To: linux-pm@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev, x86@kernel.org, acpica-devel@lists.linuxfoundation.org, linux-csky@vger.kernel.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org Cc: Salil Mehta , Jean-Philippe Brucker , jianyong.wu@arm.com, justin.he@arm.com, James Morse Subject: [PATCH RFC v3 07/21] ACPI: Rename acpi_processor_hotadd_init and remove pre-processor guards MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Wed, 13 Dec 2023 12:49:47 +0000 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231213_044955_675196_7646A0EB X-CRM114-Status: GOOD ( 16.09 ) 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 From: James Morse acpi_processor_hotadd_init() will make a CPU present by mapping it based on its hardware id. 'hotadd_init' is ambiguous once there are two different behaviours for cpu hotplug. This is for toggling the _STA present bit. Subsequent patches will add support for toggling the _STA enabled bit, named acpi_processor_make_enabled(). Rename it acpi_processor_make_present() to make it clear this is for CPUs that were not previously present. Expose the function prototypes it uses to allow the preprocessor guards to be removed. The IS_ENABLED() check will let the compiler dead-code elimination pass remove this if it isn't going to be used. Signed-off-by: James Morse Tested-by: Miguel Luis Tested-by: Vishnu Pajjuri Tested-by: Jianyong Wu Reviewed-by: Jonathan Cameron --- Outstanding comments: https://lore.kernel.org/r/20230914151720.00007105@Huawei.com https://lore.kernel.org/r/b8f430c1-c30f-191f-18c6-f750fa6ba476@redhat.com For this comment, we use IS_ENABLED() in multiple places in the kernel in this way, and it isn't a problem. --- drivers/acpi/acpi_processor.c | 14 +++++--------- include/linux/acpi.h | 2 -- 2 files changed, 5 insertions(+), 11 deletions(-) diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index c8e960ff0aca..26e3efb74614 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -183,13 +183,15 @@ static void __init acpi_pcc_cpufreq_init(void) {} #endif /* CONFIG_X86 */ /* Initialization */ -#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU -static int acpi_processor_hotadd_init(struct acpi_processor *pr) +static int acpi_processor_make_present(struct acpi_processor *pr) { unsigned long long sta; acpi_status status; int ret; + if (!IS_ENABLED(CONFIG_ACPI_HOTPLUG_PRESENT_CPU)) + return -ENODEV; + if (invalid_phys_cpuid(pr->phys_id)) return -ENODEV; @@ -223,12 +225,6 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr) cpu_maps_update_done(); return ret; } -#else -static inline int acpi_processor_hotadd_init(struct acpi_processor *pr) -{ - return -ENODEV; -} -#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ static int acpi_processor_get_info(struct acpi_device *device) { @@ -335,7 +331,7 @@ static int acpi_processor_get_info(struct acpi_device *device) * because cpuid <-> apicid mapping is persistent now. */ if (invalid_logical_cpuid(pr->id) || !cpu_present(pr->id)) { - int ret = acpi_processor_hotadd_init(pr); + int ret = acpi_processor_make_present(pr); if (ret) return ret; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 36071bc11acd..19d009ca9e7a 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -301,12 +301,10 @@ static inline int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu, } #endif -#ifdef CONFIG_ACPI_HOTPLUG_PRESENT_CPU /* Arch dependent functions for cpu hotplug support */ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu); int acpi_unmap_cpu(int cpu); -#endif /* CONFIG_ACPI_HOTPLUG_PRESENT_CPU */ #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr);