From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CE92CD610B for ; Mon, 9 Oct 2023 16:41:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377292AbjJIQlY (ORCPT ); Mon, 9 Oct 2023 12:41:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376275AbjJIQlX (ORCPT ); Mon, 9 Oct 2023 12:41:23 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 194969C for ; Mon, 9 Oct 2023 09:40:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1696869640; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+YpXHXo6RBy8CnTiTObZdU28mMjUq9Z4XmoNn8CdwOg=; b=izkoud+QpX748T7/mkz9Fwemjuho6JiQbQTwlidhNng8cvVlg+bTtMJOPuNTHikOxKyh8s gXLKkmfi4IQN7DUOe3TAz++jxjGaaOcL2AAXJQ+pPIBtFvxA1vmaGT72qF/9CH+YRqoZak rNuqz3hqNZI8+b9NFEvooqWMFGGlNiU= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-583-_JZOasHtPZ-nAmJ4PwQ6rQ-1; Mon, 09 Oct 2023 12:40:39 -0400 X-MC-Unique: _JZOasHtPZ-nAmJ4PwQ6rQ-1 Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-3f5df65fa35so30410245e9.3 for ; Mon, 09 Oct 2023 09:40:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696869638; x=1697474438; h=content-transfer-encoding:mime-version:user-agent:references :in-reply-to:date:cc:to:from:subject:message-id:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=+YpXHXo6RBy8CnTiTObZdU28mMjUq9Z4XmoNn8CdwOg=; b=WGhbChEK6TdqAgVjyaGhh/W+NyGW9gpvbcy08jZkxHsR7PfuVlwJ2Hj3P9bZlPWdfP BzDJ5s9FfpDqdWwowJ1G+rB3Rx8EH7+f6tbwtCQWa46yejRLJYN9V25/mhsV1KntuwAb Ra6WTWExBG8qnIxU8gBtftd343vGqMOUVjyRMY3t2lIGHQTAYhVKAX5IdBke/uXAYmwE xBSoVaHyWfvgamIfSKjthWvKxp3JnzWbMGVldf5UgWbl4TJtEmFJE/C6aqWRaj127885 r+3zUV1QrI8CXY9MXZWTgs63OpA9jC43EyU+5N9mPl8Ao6wkft/V3NvsykBuqbO0DMbV Iylw== X-Gm-Message-State: AOJu0YyMqZ1ckajTN2O26rpbYQjT6ZGMNnm2iVDpEDhvdVG9KFkt6UU/ 29BTXtapax5BJBT88CyaHFJc1VEOmfiI0FKGAGd2httMluwSGmh2mceBXw1sUW7OfQXYdvtQa0a L9FAzKf2cDbla X-Received: by 2002:a05:600c:2949:b0:405:82c0:d9d9 with SMTP id n9-20020a05600c294900b0040582c0d9d9mr14896212wmd.41.1696869638576; Mon, 09 Oct 2023 09:40:38 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEMgAs2OFs3TPKIXUcqwEYEgUj8NhgbOlPIyIMA79idAa9Hjf42+dP6kuPpgcF+X3v1F7p9tg== X-Received: by 2002:a05:600c:2949:b0:405:82c0:d9d9 with SMTP id n9-20020a05600c294900b0040582c0d9d9mr14896162wmd.41.1696869638060; Mon, 09 Oct 2023 09:40:38 -0700 (PDT) Received: from starship ([89.237.100.246]) by smtp.gmail.com with ESMTPSA id bd5-20020a05600c1f0500b004030e8ff964sm14033430wmb.34.2023.10.09.09.40.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Oct 2023 09:40:37 -0700 (PDT) Message-ID: <907b351fee183609891a4d0cfb0a79bad85577a0.camel@redhat.com> Subject: Re: [RFC PATCH v2 14/20] x86/kvm: Make kvm_async_pf_enabled __ro_after_init From: Maxim Levitsky To: Valentin Schneider , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, bpf@vger.kernel.org, x86@kernel.org, rcu@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Steven Rostedt , Masami Hiramatsu , Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Paolo Bonzini , Wanpeng Li , Vitaly Kuznetsov , Andy Lutomirski , Peter Zijlstra , Frederic Weisbecker , "Paul E. McKenney" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Andrew Morton , Uladzislau Rezki , Christoph Hellwig , Lorenzo Stoakes , Josh Poimboeuf , Jason Baron , Kees Cook , Sami Tolvanen , Ard Biesheuvel , Nicholas Piggin , Juerg Haefliger , Nicolas Saenz Julienne , "Kirill A. Shutemov" , Nadav Amit , Dan Carpenter , Chuang Wang , Yang Jihong , Petr Mladek , "Jason A. Donenfeld" , Song Liu , Julian Pidancet , Tom Lendacky , Dionna Glaze , Thomas =?ISO-8859-1?Q?Wei=DFschuh?= , Juri Lelli , Daniel Bristot de Oliveira , Marcelo Tosatti , Yair Podemsky Date: Mon, 09 Oct 2023 19:40:31 +0300 In-Reply-To: <20230720163056.2564824-15-vschneid@redhat.com> References: <20230720163056.2564824-1-vschneid@redhat.com> <20230720163056.2564824-15-vschneid@redhat.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.5 (3.36.5-2.fc32) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org У чт, 2023-07-20 у 17:30 +0100, Valentin Schneider пише: > objtool now warns about it: > > vmlinux.o: warning: objtool: exc_page_fault+0x2a: Non __ro_after_init static key "kvm_async_pf_enabled" in .noinstr section > > The key can only be enabled (and not disabled) in the __init function > kvm_guest_init(), so mark it as __ro_after_init. > > Signed-off-by: Valentin Schneider > --- > arch/x86/kernel/kvm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c > index 1cceac5984daa..319460090a836 100644 > --- a/arch/x86/kernel/kvm.c > +++ b/arch/x86/kernel/kvm.c > @@ -44,7 +44,7 @@ > #include > #include > > -DEFINE_STATIC_KEY_FALSE(kvm_async_pf_enabled); > +DEFINE_STATIC_KEY_FALSE_RO(kvm_async_pf_enabled); > > static int kvmapf = 1; > Reviewed-by: Maxim Levitsky Best regards, Maxim Levitsky