From nobody Tue Feb 10 03:57:37 2026 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 40C13C001E0 for ; Fri, 21 Jul 2023 23:00:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230014AbjGUXAn (ORCPT ); Fri, 21 Jul 2023 19:00:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231252AbjGUXA2 (ORCPT ); Fri, 21 Jul 2023 19:00:28 -0400 Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 488383C0D for ; Fri, 21 Jul 2023 16:00:24 -0700 (PDT) Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-1bb7b0b8315so5024525ad.1 for ; Fri, 21 Jul 2023 16:00:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689980423; x=1690585223; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=N+/CFCalnN5xPq+FJCMcppiU8/rhXPIN/0hig0msSo8=; b=O+6lv7D05Q0OUUA9ynt/KcA/czw0nVCmbf+DG+BCK0K9Z7aCmw2tgEyYalVuedspq8 piJatN1AxWJYSYEWXCgEWV6Lj9WRMaYOQpNFZf/D6YxBGvXXC9sxFeWVnYSsh9PgdALK TI08rE9tC6B2sbC+Jjczj0KDs710pw7/X1Q1ffZt9W4t0WnhvXUr1aVaNL8cXazRCmS1 C0EhZctoNOm/7wdzAXrff4qAVIbwy2Z8bb+Wn7hr5Vao+gofADZJgTNphVeN4r5pIW46 fLax9V/1g5GZUDnUccR06p1tDp+XdU1R4e6QA1byPUciyCipHt9n184iwnlMoLNkuP/D gFtw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689980423; x=1690585223; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=N+/CFCalnN5xPq+FJCMcppiU8/rhXPIN/0hig0msSo8=; b=kc85QfgtXFe3pKuaHl/HW6zHMTYXo7Bg4wmkvzHFa/lQiOjbfHzEa4plksgpwhF23k vwMtg9E+VBpQ4EQk53aPSs7zvD9cmq5MMraWpBdrspninCxPWRNnsHdYaSZctQxvEpti ua8i5tTVhpf58+wQZ26G5WlRCRHByNG1jC7bZt3MmGE7NWJ36akRGzo3kKRrUN7qbJ0G UiCG83lF6EOX9s+1HebZP+cagZBdmlPL193/M4lPlDQIbKTz+L9NPN0MZPags9xbKrfs LetpOpt4/Zzf4wWoQPUW/NXEQDZoy8u+HeeK03rx5rZcCPqZtVyGtLFR2XImwjdKgmLK djDg== X-Gm-Message-State: ABy/qLaO23uKa7hGOS+ZKGCvZaa0kwI2Y31X121ns4+knQmd9c/dXQpY tSSPZnhhsShgYevherDjYbIHETf+MHE= X-Google-Smtp-Source: APBJJlEdgoY2p3pkiIdjBOcg3jw3MqxAMwsO+nZ04BO6YA4qb9EUQT+jbdKrNSLS86YvWP/CqI58RihYbdk= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:902:e74a:b0:1b8:b7fc:9aa1 with SMTP id p10-20020a170902e74a00b001b8b7fc9aa1mr13677plf.1.1689980423625; Fri, 21 Jul 2023 16:00:23 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 21 Jul 2023 16:00:04 -0700 In-Reply-To: <20230721230006.2337941-1-seanjc@google.com> Mime-Version: 1.0 References: <20230721230006.2337941-1-seanjc@google.com> X-Mailer: git-send-email 2.41.0.487.g6d72f3e995-goog Message-ID: <20230721230006.2337941-8-seanjc@google.com> Subject: [PATCH v2 7/9] KVM: x86/mmu: Use BUILD_BUG_ON_INVALID() for KVM_MMU_WARN_ON() stub From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Mingwei Zhang , David Matlack , Jim Mattson Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use BUILD_BUG_ON_INVALID() instead of an empty do-while loop to stub out KVM_MMU_WARN_ON() when CONFIG_KVM_PROVE_MMU=3Dn, that way _some_ build issues with the usage of KVM_MMU_WARN_ON() will be dected even if the kernel is using the stubs, e.g. basic syntax errors will be detected. Signed-off-by: Sean Christopherson --- arch/x86/kvm/mmu/mmu_internal.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_interna= l.h index 40e74db6a7d5..f1ef670058e5 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -9,7 +9,7 @@ #ifdef CONFIG_KVM_PROVE_MMU #define KVM_MMU_WARN_ON(x) WARN_ON_ONCE(x) #else -#define KVM_MMU_WARN_ON(x) do { } while (0) +#define KVM_MMU_WARN_ON(x) BUILD_BUG_ON_INVALID(x) #endif =20 /* Page table builder macros common to shadow (host) PTEs and guest PTEs. = */ --=20 2.41.0.487.g6d72f3e995-goog