From patchwork Sat Jun 29 02:42:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiongfeng Wang X-Patchwork-Id: 11023693 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0A5D41398 for ; Sat, 29 Jun 2019 02:47:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0DB642883D for ; Sat, 29 Jun 2019 02:47:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 00A5D2886C; Sat, 29 Jun 2019 02:47:13 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9E0222883D for ; Sat, 29 Jun 2019 02:47:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=R0eLbko3RZlDysfKLUfaoGpLFQlqUidtAtupN/QglC4=; b=AjTMjCuKfe4m0k 923HFZITw5Ll/pBY3wn/AmU2pdjOIou1+UBEc+CBCdSZYxd3X9QY+DH77Eq0zhLSYjE9b3avsTB7D NPlZtapJQrWQQcqICLWx8i4z12PMe0FYEtAR4sYl9vpK85i8pLz8PD7uTTnqyDEVKjaO4amcVzBfd 96o1QoN3K4SFMFc7QuIFxtB6psDpoPQYdIo4QV8+HddU7GWyY3EYZ19sTcie+FhfninCCJ1M+DGab FxiYwq1nLdfJtbzJOUB/kmvInFvvvCKMfRc3/W0gQSwuIiy3fxPnepg/Y36A5v2i3wv5Og5EV6cJk a+r7hhj3BIrVbnd7W4XA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hh3ON-0007dq-RP; Sat, 29 Jun 2019 02:47:07 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hh3MG-0004qJ-FK for linux-arm-kernel@lists.infradead.org; Sat, 29 Jun 2019 02:45:06 +0000 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 24138748E1AEC8CEF4C4; Sat, 29 Jun 2019 10:44:51 +0800 (CST) Received: from linux-ibm.site (10.175.102.37) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.439.0; Sat, 29 Jun 2019 10:44:43 +0800 From: Xiongfeng Wang To: , , Subject: [RFC PATCH v2 3/3] arm64: Add CPU hotplug support Date: Sat, 29 Jun 2019 10:42:35 +0800 Message-ID: <1561776155-38975-4-git-send-email-wangxiongfeng2@huawei.com> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1561776155-38975-1-git-send-email-wangxiongfeng2@huawei.com> References: <1561776155-38975-1-git-send-email-wangxiongfeng2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190628_194456_849819_0E62C875 X-CRM114-Status: GOOD ( 10.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xiexiuqi@huawei.com, jonathan.cameron@huawei.com, john.garry@huawei.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, huawei.libin@huawei.com, guohanjun@huawei.com, wangxiongfeng2@huawei.com, linux-arm-kernel@lists.infradead.org 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 To support CPU hotplug, we need to implement 'acpi_(un)map_cpu()' and 'arch_(un)register_cpu()' for ARM64. These functions are called in 'acpi_processor_hotadd_init()/acpi_processor_remove()' when the CPU is hot added into or hot removed from the system. Signed-off-by: Xiongfeng Wang --- arch/arm64/kernel/acpi.c | 22 ++++++++++++++++++++++ arch/arm64/kernel/setup.c | 17 +++++++++++++++++ 2 files changed, 39 insertions(+) diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 2804330..57835fa 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -25,6 +25,7 @@ #include #include +#include #include #include #include @@ -284,3 +285,24 @@ int apei_claim_sea(struct pt_regs *regs) return err; } + +int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, + int *pcpu) +{ + int cpu; + + cpu = acpi_map_cpuid(physid, acpi_id); + *pcpu = cpu; + set_cpu_present(cpu, true); + + return 0; +} +EXPORT_SYMBOL(acpi_map_cpu); + +int acpi_unmap_cpu(int cpu) +{ + set_cpu_present(cpu, false); + + return 0; +} +EXPORT_SYMBOL(acpi_unmap_cpu); diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 7f4d12a..f2a881e 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -398,3 +398,20 @@ static int __init register_kernel_offset_dumper(void) return 0; } __initcall(register_kernel_offset_dumper); + +int arch_register_cpu(int num) +{ + struct cpu *cpu = &per_cpu(cpu_data.cpu, num); + + cpu->hotpluggable = 1; + return register_cpu(cpu, num); +} +EXPORT_SYMBOL(arch_register_cpu); + +void arch_unregister_cpu(int num) +{ + struct cpu *cpu = &per_cpu(cpu_data.cpu, num); + + unregister_cpu(cpu); +} +EXPORT_SYMBOL(arch_unregister_cpu);