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[2620:137:e000::1:20]) by mx.google.com with ESMTP id k11-20020aa7972b000000b005a8ec89de5fsi12020919pfg.236.2023.03.07.06.08.17; Tue, 07 Mar 2023 06:08:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=DsEKCHkf; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231148AbjCGNxY (ORCPT + 99 others); Tue, 7 Mar 2023 08:53:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230377AbjCGNxJ (ORCPT ); Tue, 7 Mar 2023 08:53:09 -0500 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A770B83888; Tue, 7 Mar 2023 05:52:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678197158; x=1709733158; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=sQ7LWgB/6JVGYkKwEe+WCyTFEuM/QI03P1Yc2gqbCAg=; b=DsEKCHkffa/VMJPmZfwtfWKapbE3Q+Ep0Jmie9MnOokls+JwHn5aOne7 hpVyrfMXaJwKbGFFfeNoC3NLr6xbsUHnJoF61LJ1aUKIwuihTmbo7Cc/o KSI2VOf1hjidNPZiUAG1LcWc0udParN6p7Co/H8fvo31WoL3Qp2XnxEDi KFoOWfPsbHSKM2md0GtkWD4HfeiANrdu+PfWYGxiasjA/DCxaOPPoKCuT KKwRR6FP5Fu1FqWqN2QYx6VMYLY7jimkdcxS5h9DUiaEaYUHVaKFJMUwX WU2xOR09tpPYCnBQuBE4LDoAM3SadLLfqi9/rSe475H9goybJP4MyGL8m A==; X-IronPort-AV: E=McAfee;i="6500,9779,10641"; a="400675435" X-IronPort-AV: E=Sophos;i="5.98,241,1673942400"; d="scan'208";a="400675435" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2023 05:52:38 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10641"; a="626551621" X-IronPort-AV: E=Sophos;i="5.98,241,1673942400"; d="scan'208";a="626551621" Received: from tdx-lm.sh.intel.com ([10.239.53.27]) by orsmga003.jf.intel.com with ESMTP; 07 Mar 2023 05:52:35 -0800 From: Wei Wang To: seanjc@google.com, dmatlack@google.com, mizhang@google.com, isaku.yamahata@gmail.com, pbonzini@redhat.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Wei Wang Subject: [PATCH v2] KVM: allow KVM_BUG/KVM_BUG_ON to handle 64-bit cond Date: Tue, 7 Mar 2023 21:52:33 +0800 Message-Id: <20230307135233.54684-1-wei.w.wang@intel.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759718261245957431?= X-GMAIL-MSGID: =?utf-8?q?1759718261245957431?= Current KVM_BUG and KVM_BUG_ON assume that 'cond' passed from callers is 32-bit as it casts 'cond' to the type of int. This will be wrong if 'cond' provided by a caller is 64-bit, e.g. an error code of 0xc0000d0300000000 will be converted to 0, which is not expected. Improves the implementation by using bool in KVM_BUG and KVM_BUG_ON. 'bool' is preferred to 'int' as __ret is essentially used as a boolean and coding-stytle.rst documents that use of bool is encouraged to improve readability and is often a better option than 'int' for storing boolean values. Fixes: 0b8f11737cff ("KVM: Add infrastructure and macro to mark VM as bugged") Signed-off-by: Wei Wang Reviewed-by: Mingwei Zhang Reviewed-by: Sean Christopherson --- include/linux/kvm_host.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index f06635b24bd0..0221a48b3e3d 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -881,7 +881,7 @@ static inline void kvm_vm_bugged(struct kvm *kvm) #define KVM_BUG(cond, kvm, fmt...) \ ({ \ - int __ret = (cond); \ + bool __ret = !!(cond); \ \ if (WARN_ONCE(__ret && !(kvm)->vm_bugged, fmt)) \ kvm_vm_bugged(kvm); \ @@ -890,7 +890,7 @@ static inline void kvm_vm_bugged(struct kvm *kvm) #define KVM_BUG_ON(cond, kvm) \ ({ \ - int __ret = (cond); \ + bool __ret = !!(cond); \ \ if (WARN_ON_ONCE(__ret && !(kvm)->vm_bugged)) \ kvm_vm_bugged(kvm); \