From patchwork Tue Apr 30 14:24:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 793403 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B9136180A70; Tue, 30 Apr 2024 14:33:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714487605; cv=none; b=Wvmo22VBcBlwci9hKjEH8vtjO/94OmGjTsWcUNig0hesfaB+j3mVNbq0R+mktsO1UXYB7rCp5IStRIvXYcx+cVBWicc6Jubk76gNREWSmsglIdlPBkSumCofjXmA9ny1YooSPGyqt6zNmnRYljmaMF49w0ovIfei4w1k/VEsbzE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714487605; c=relaxed/simple; bh=JOtBk0Y4w1pZHwjVrcc+I+akWt3sBbp8f9hSPAgnTME=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SZQtBmc6wZo6anWdtGt1VFOzWZ/LxwCIBLj6t7jQRmcqFNbtoTJjHTe9D1b4v06H8l9z/rrRzIqGtPpQGJd7X5l8dJVV248d6L/kg53MWCdYrzTZCgsV5JDlleJLWZAGg0Md6LTjy2SMPczLUhlRR8Zr14eNtee0Z2Bop/tDYlc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4VTN0M3QkFz6GD3R; Tue, 30 Apr 2024 22:30:43 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id B8A08140B2A; Tue, 30 Apr 2024 22:33:20 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Tue, 30 Apr 2024 15:33:20 +0100 From: Jonathan Cameron To: Thomas Gleixner , Peter Zijlstra , , , , , , , , , Russell King , "Rafael J . Wysocki" , Miguel Luis , James Morse , Salil Mehta , Jean-Philippe Brucker , Catalin Marinas , Will Deacon , Marc Zyngier , Hanjun Guo , Gavin Shan CC: Ingo Molnar , Borislav Petkov , Dave Hansen , , , Subject: [PATCH v9 17/19] arm64: Kconfig: Enable hotplug CPU on arm64 if ACPI_PROCESSOR is enabled. Date: Tue, 30 Apr 2024 15:24:32 +0100 Message-ID: <20240430142434.10471-18-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240430142434.10471-1-Jonathan.Cameron@huawei.com> References: <20240430142434.10471-1-Jonathan.Cameron@huawei.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml100003.china.huawei.com (7.191.160.210) To lhrpeml500005.china.huawei.com (7.191.163.240) In order to move arch_register_cpu() to be called via the same path for initially present CPUs described by ACPI and hotplugged CPUs ACPI_HOTPLUG_CPU needs to be enabled. The protection against invalid IDs in acpi_map_cpu() is needed as at least one production BIOS is in the wild which reports entries in DSDT (with no _STA method, so assumed enabled and present) that don't match MADT. Tested-by: Miguel Luis Signed-off-by: Jonathan Cameron Reviewed-by: Gavin Shan --- V9: No change. --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/acpi.c | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 7b11c98b3e84..fed7d0d54179 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -5,6 +5,7 @@ config ARM64 select ACPI_CCA_REQUIRED if ACPI select ACPI_GENERIC_GSI if ACPI select ACPI_GTDT if ACPI + select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR select ACPI_IORT if ACPI select ACPI_REDUCED_HARDWARE_ONLY if ACPI select ACPI_MCFG if (ACPI && PCI) diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index dba8fcec7f33..fb9368197c74 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -29,6 +29,7 @@ #include #include +#include #include #include #include @@ -413,6 +414,27 @@ void arch_reserve_mem_area(acpi_physical_address addr, size_t size) memblock_mark_nomap(addr, size); } +#ifdef CONFIG_ACPI_HOTPLUG_CPU +int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 apci_id, + int *pcpu) +{ + /* If an error code is passed in this stub can't fix it */ + if (*pcpu < 0) { + pr_warn_once("Unable to map CPU to valid ID\n"); + return *pcpu; + } + + return 0; +} +EXPORT_SYMBOL(acpi_map_cpu); + +int acpi_unmap_cpu(int cpu) +{ + return 0; +} +EXPORT_SYMBOL(acpi_unmap_cpu); +#endif /* CONFIG_ACPI_HOTPLUG_CPU */ + #ifdef CONFIG_ACPI_FFH /* * Implements ARM64 specific callbacks to support ACPI FFH Operation Region as