From patchwork Tue Jan 14 17:51:20 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Schneider X-Patchwork-Id: 13939094 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63CCCE77188 for ; Tue, 14 Jan 2025 17:56:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DB789280005; Tue, 14 Jan 2025 12:56:03 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id D6837280001; Tue, 14 Jan 2025 12:56:03 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B9328280005; Tue, 14 Jan 2025 12:56:03 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 9B00A280001 for ; Tue, 14 Jan 2025 12:56:03 -0500 (EST) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 57E0A43F08 for ; Tue, 14 Jan 2025 17:56:03 +0000 (UTC) X-FDA: 83006811006.01.63567A7 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf06.hostedemail.com (Postfix) with ESMTP id 80012180002 for ; Tue, 14 Jan 2025 17:56:01 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=Hmrh2re3; spf=pass (imf06.hostedemail.com: domain of vschneid@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=vschneid@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1736877361; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=P7DcLPe7N47ORcKkDkopF1lM4hKgrpRYFpILYCZNJJ8=; b=8lWUw9FxhY+fOjsuj+9atqe8WwedlzR1oUC/F9OySyyWLVZ/gBqz/li7arkbvznaaz3pSI ouxENXJRMwBDsR1eEiYY4Bk6WUfcMEa5GuqYpvqzr/pdmvdxFfLjM6ls9tg1HLP+FAc0qQ klXhoA1aXmHSmnuNCAW1meycMzY6oEU= ARC-Authentication-Results: i=1; imf06.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=Hmrh2re3; spf=pass (imf06.hostedemail.com: domain of vschneid@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=vschneid@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1736877361; a=rsa-sha256; cv=none; b=CF66dmuNYAXz4bkAv60HTaGNqcKCl2m9bIIesHVo1gPUaavFLwb7yZXH4YjrevRyvdxsAG Cb1n4buhpU5wGc57lCJP8UwIAwRzplBvbKrc1luSlmLVpHbnLPKWtX/ddnH/MCo5+B/U71 WsS5XqKahxw4PHyIXaJ5FAMJNr8or+M= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1736877360; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=P7DcLPe7N47ORcKkDkopF1lM4hKgrpRYFpILYCZNJJ8=; b=Hmrh2re35pneF6+MKShEnpiJyIiZGE63kjrakzUNSGzl64C3jXoHC0meAYeMlkzigUBfZg deTOR+KBgQtFRd8psw2tMmOUJS+r6qGkuf9+xQRqGN9CaNCx9B4rXw6iGuMJDum6s6l8WM slG336zVaM3wwKuEfaCsls2EqQ3mrQM= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-20-jE76dcsZPt-31fHWsIhMBg-1; Tue, 14 Jan 2025 12:55:57 -0500 X-MC-Unique: jE76dcsZPt-31fHWsIhMBg-1 X-Mimecast-MFC-AGG-ID: jE76dcsZPt-31fHWsIhMBg Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 47A70195609E; Tue, 14 Jan 2025 17:55:53 +0000 (UTC) Received: from vschneid-thinkpadt14sgen2i.remote.csb (unknown [10.39.192.55]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6703A195608A; Tue, 14 Jan 2025 17:55:28 +0000 (UTC) From: Valentin Schneider To: linux-kernel@vger.kernel.org, x86@kernel.org, virtualization@lists.linux.dev, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, linux-perf-users@vger.kernel.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, linux-arch@vger.kernel.org, rcu@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, bpf@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Cc: Josh Poimboeuf , Juergen Gross , Ajay Kaher , Alexey Makhalov , Russell King , Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Paul Walmsley , Palmer Dabbelt , Albert Ou , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Peter Zijlstra , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Liang, Kan" , Boris Ostrovsky , Pawan Gupta , Sean Christopherson , Paolo Bonzini , Andy Lutomirski , Arnd Bergmann , Frederic Weisbecker , "Paul E. McKenney" , Jason Baron , Steven Rostedt , Ard Biesheuvel , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Juri Lelli , Clark Williams , Yair Podemsky , Tomas Glozar , Vincent Guittot , Dietmar Eggemann , Ben Segall , Mel Gorman , Kees Cook , Andrew Morton , Christoph Hellwig , Shuah Khan , Sami Tolvanen , Miguel Ojeda , Alice Ryhl , "Mike Rapoport (Microsoft)" , Samuel Holland , Rong Xu , Nicolas Saenz Julienne , Geert Uytterhoeven , Yosry Ahmed , "Kirill A. Shutemov" , "Masami Hiramatsu (Google)" , Jinghao Jia , Luis Chamberlain , Randy Dunlap , Tiezhu Yang Subject: [PATCH v4 07/30] x86/paravirt: Mark pv_sched_clock static call as __ro_after_init Date: Tue, 14 Jan 2025 18:51:20 +0100 Message-ID: <20250114175143.81438-8-vschneid@redhat.com> In-Reply-To: <20250114175143.81438-1-vschneid@redhat.com> References: <20250114175143.81438-1-vschneid@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 X-Rspamd-Server: rspam05 X-Stat-Signature: dfe8m1yg6embzecqufpgq5rg9w7t8kzm X-Rspamd-Queue-Id: 80012180002 X-Rspam-User: X-HE-Tag: 1736877361-42139 X-HE-Meta: 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 QYnBBg// CMsVLDXiWaKYtmEQay33COjUh/If594qteuTty0VrzF/USGCZrjiPv7pPCILeFIIoJm18yE0rBRWMF0jwq0E7InG6PFi37JkFul8KNofsMUNhdTvWOL5am68ow4Vui7EFJeNq09WY0wp9JoUy6AAq4OSemO1uxtfFTjYxiN5ggLd2h82FvgDPOstyRl/FefGLCfHKSs3l6cynzv6RQzB1eUny+YiKDn9YgzBt7wzTRpPaKKPaKsVnZwDhzzDl6JVM4QVxnEBl6BcZX5107OUYZKx2g2QQMDFdO/2D1YhleJpchN74rYDFXdjZJsyfZND7wyB9UhhOm2gY8JhzCOrI2hMAZQHkhgCNL/2rYtmw9nVvpoWMceIZaePCDfNJu9/ePbLoA3ViXGMKeRFQogroTfuk5ODUoVSuQXZ/PegyP9Gw/iGxX2NmPXWqf05w4vE94cgZOeLr+JDk73FFMeIuN5imGIR37LGmW08MTKsCyigCjpU= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Later commits will cause objtool to warn about static calls being used in .noinstr sections in order to safely defer instruction patching IPIs targeted at NOHZ_FULL CPUs. pv_sched_clock is updated in: o __init vmware_paravirt_ops_setup() o __init xen_init_time_common() o kvm_sched_clock_init() <- __init kvmclock_init() o hv_setup_sched_clock() <- __init hv_init_tsc_clocksource() IOW purely init context, and can thus be marked as __ro_after_init. Reported-by: Josh Poimboeuf Signed-off-by: Valentin Schneider --- arch/x86/kernel/paravirt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index fec3815335558..ae6675167877b 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -73,7 +73,7 @@ static u64 native_steal_clock(int cpu) } DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock); -DEFINE_STATIC_CALL(pv_sched_clock, native_sched_clock); +DEFINE_STATIC_CALL_RO(pv_sched_clock, native_sched_clock); void paravirt_set_sched_clock(u64 (*func)(void)) {