From patchwork Fri Nov 1 01:45:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11222249 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EF4CD139A for ; Fri, 1 Nov 2019 01:46:51 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C3FE620650 for ; Fri, 1 Nov 2019 01:46:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C3FE620650 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:55294 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iQM1a-00073L-Sx for patchwork-qemu-devel@patchwork.kernel.org; Thu, 31 Oct 2019 21:46:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37431) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iQM0u-0006Uw-0e for qemu-devel@nongnu.org; Thu, 31 Oct 2019 21:46:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iQM0r-00055r-S5 for qemu-devel@nongnu.org; Thu, 31 Oct 2019 21:46:07 -0400 Received: from mga04.intel.com ([192.55.52.120]:28146) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iQM0q-0004td-Li for qemu-devel@nongnu.org; Thu, 31 Oct 2019 21:46:05 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Oct 2019 18:46:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,253,1569308400"; d="scan'208";a="206283499" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by FMSMGA003.fm.intel.com with ESMTP; 31 Oct 2019 18:45:58 -0700 From: Wei Yang To: pbonzini@redhat.com, mtosatti@redhat.com, rth@twiddle.net, ehabkost@redhat.com Subject: [PATCH] target/i386: return directly from hyperv_init_vcpu() if hyperv not enabled Date: Fri, 1 Nov 2019 09:45:28 +0800 Message-Id: <20191101014528.14505-1-richardw.yang@linux.intel.com> X-Mailer: git-send-email 2.17.1 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org, Wei Yang Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" If hyperv is not enabled, related features are not set or enabled. No extra work to do, return directly. --- First time touch hyperv, hope my understanding is correct. Signed-off-by: Wei Yang --- target/i386/kvm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/target/i386/kvm.c b/target/i386/kvm.c index bfd09bd441..6532904f0c 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -1365,6 +1365,9 @@ static int hyperv_init_vcpu(X86CPU *cpu) Error *local_err = NULL; int ret; + if (!hyperv_enabled(cpu)) + return 0; + if (cpu->hyperv_passthrough && hv_passthrough_mig_blocker == NULL) { error_setg(&hv_passthrough_mig_blocker, "'hv-passthrough' CPU flag prevents migration, use explicit"