From patchwork Fri Jan 24 13:20:32 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13949426 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 735D93594E for ; Fri, 24 Jan 2025 13:39:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737725959; cv=none; b=WEvmYxN4jtuxOPhncSOB5s8eD1A9v4SNWSX4MPQCzX7QryJMtn7Cjc8WfrFA8D+rYrdt1fO4mNkiI8stqJRSqNQqfcRA2qYSIsM+P09XdaA0qogL7YXXnvshiJ2UyT/itDRwMuZAmL9Qo5T0dtydEROPnopSN4fHYlFCu1Rqm2g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737725959; c=relaxed/simple; bh=VD5cLhhOxm2rY5XZ6+nf6tMgf/SKVeJGzlvaWHkLI9U=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fsG77C1pr0nbLJTp2UPL6530m34c/qprvt+rUv9f2LbNqRIyz2cdHqimoIpEiCPwQJZhvNlrpRCdLGh8fzJ1GGLfYB1uafr95f/41PfjB6V/JeOecYc/IeLLrxF7o+Yh7xuDx0qsoKiFIL3EPMVAaRl18ThRF+tl/Hzhf/knnWU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=aoWGBbZg; arc=none smtp.client-ip=198.175.65.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="aoWGBbZg" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1737725959; x=1769261959; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VD5cLhhOxm2rY5XZ6+nf6tMgf/SKVeJGzlvaWHkLI9U=; b=aoWGBbZgCh/D38e1Q4y56gzX143jBnj8GoHMIAl6stzv6sISKaHQrB9U j14SF7YWIgeZm7hjzPIt7FHy1ocGc0FuURhph1OKNCjBl2YShduC0Gmoe WB5RRo6vPAyPqYwZYhoM1PtQ0RyirNyPNyaYDl9vZhKxRgfe1lLZUEgjd 9SVGgdL7cc8J41XhPpIVpiIUlUk1bMcHvTDb9oZfaeGEMon3fZ8xVmkPW YQeOdA5gnlGtLaf/eyyqNZ77LgIxmEklRGuUWEX/OCFsITFw8E9V4XypQ unoF56KYSR/3aMvV2sp8IqO0MhBrq1VVrQy3O7suykeYXFHhU4srRTLw5 g==; X-CSE-ConnectionGUID: K2DQSF+lQC6W49B/2rXSFQ== X-CSE-MsgGUID: F2wVZfl9TeOCsOf+e6qsRQ== X-IronPort-AV: E=McAfee;i="6700,10204,11325"; a="49246515" X-IronPort-AV: E=Sophos;i="6.13,231,1732608000"; d="scan'208";a="49246515" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2025 05:39:19 -0800 X-CSE-ConnectionGUID: k5hFUSl5SLWds1zHhX0NtQ== X-CSE-MsgGUID: ud8VOOXFTjingq/w1aRZCg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="111804414" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by fmviesa003.fm.intel.com with ESMTP; 24 Jan 2025 05:39:14 -0800 From: Xiaoyao Li To: Paolo Bonzini , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , =?utf-8?q?Phil?= =?utf-8?q?ippe_Mathieu-Daud=C3=A9?= , Igor Mammedov Cc: Zhao Liu , "Michael S. Tsirkin" , Eric Blake , Markus Armbruster , Peter Maydell , Marcelo Tosatti , Huacai Chen , Rick Edgecombe , Francesco Lavra , xiaoyao.li@intel.com, qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [PATCH v7 36/52] i386/tdx: Don't synchronize guest tsc for TDs Date: Fri, 24 Jan 2025 08:20:32 -0500 Message-Id: <20250124132048.3229049-37-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250124132048.3229049-1-xiaoyao.li@intel.com> References: <20250124132048.3229049-1-xiaoyao.li@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 741b50181ed9..ead1d0263385 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -327,7 +327,7 @@ 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); }