From patchwork Tue Aug 2 07:47:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 12934331 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 65E5FC00140 for ; Tue, 2 Aug 2022 07:51:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236327AbiHBHvJ (ORCPT ); Tue, 2 Aug 2022 03:51:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236226AbiHBHuw (ORCPT ); Tue, 2 Aug 2022 03:50:52 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 950634BD3D for ; Tue, 2 Aug 2022 00:50:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1659426630; x=1690962630; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=rj1dZCAXhln2crXrSUkiy4OQPiD7hxtS5+RQUY19t7M=; b=iJTgy1Pyfge6h1rHlm3JPrFRYmFDkZw9k1Yo/1QIOM7HNQJ1vzN7emqp ZQF2JUa4lolF7CiPLfrv2ko0/Xqocu12dr1NWTdO83jsTNBNU+eptJA2a jQrOFRvUshZIy0B3C5N9e+N5z93fjIz+/BIImuRR5ix9+/7ya5vodkbJQ I1+q7WJ8QQ9qGeun/iCeB7UJK79FWf8zTO9mygrAHZow6iDXta4Qx7eOf OduSmb2/rSqTGskI4CeGmGPkovyRCUiaFbM5ZtUqYNivjdloA5ioFmo5g 8Uw66EkaZA1HQsXhtAlBpSy6R4vBn3s3IvGPaKBbknhhq5JrsX95VpSJK w==; X-IronPort-AV: E=McAfee;i="6400,9594,10426"; a="272393223" X-IronPort-AV: E=Sophos;i="5.93,210,1654585200"; d="scan'208";a="272393223" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Aug 2022 00:50:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,210,1654585200"; d="scan'208";a="630604490" Received: from lxy-dell.sh.intel.com ([10.239.48.38]) by orsmga008.jf.intel.com with ESMTP; 02 Aug 2022 00:50:26 -0700 From: Xiaoyao Li To: Paolo Bonzini , Isaku Yamahata , Gerd Hoffmann , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , =?utf-8?q?Phi?= =?utf-8?q?lippe_Mathieu-Daud=C3=A9?= , Richard Henderson , "Michael S . Tsirkin" , Marcel Apfelbaum , Cornelia Huck , Marcelo Tosatti , Laszlo Ersek , Eric Blake Cc: Connor Kuehl , erdemaktas@google.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, seanjc@google.com, xiaoyao.li@intel.com Subject: [PATCH v1 36/40] i386/tdx: Don't synchronize guest tsc for TDs Date: Tue, 2 Aug 2022 15:47:46 +0800 Message-Id: <20220802074750.2581308-37-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220802074750.2581308-1-xiaoyao.li@intel.com> References: <20220802074750.2581308-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Isaku Yamahata TSC of TDs is not accessible and KVM doesn't allow access of MSR_IA32_TSC for TDs. To avoid the assert() in kvm_get_tsc, make kvm_synchronize_all_tsc() noop for TDs, Signed-off-by: Isaku Yamahata Reviewed-by: Connor Kuehl Signed-off-by: Xiaoyao Li Acked-by: Gerd Hoffmann --- target/i386/kvm/kvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 8c282122ed67..8999f64eeaf1 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -270,7 +270,7 @@ void kvm_synchronize_all_tsc(void) { CPUState *cpu; - if (kvm_enabled()) { + if (kvm_enabled() && !is_tdx_vm()) { CPU_FOREACH(cpu) { run_on_cpu(cpu, do_kvm_synchronize_tsc, RUN_ON_CPU_NULL); }