From patchwork Tue Nov 5 06:23:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13862421 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A0AEBD1CA39 for ; Tue, 5 Nov 2024 06:40:06 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t8DEN-0002cl-Tf; Tue, 05 Nov 2024 01:40:00 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t8DDk-0000wX-3h for qemu-devel@nongnu.org; Tue, 05 Nov 2024 01:39:29 -0500 Received: from mgamail.intel.com ([198.175.65.18]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t8DDd-0001vj-LT for qemu-devel@nongnu.org; Tue, 05 Nov 2024 01:39:16 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730788754; x=1762324754; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=mgYnaE32reSGuV7hHoP0EJIpwxMG8v5/dHOATY3+4xU=; b=aUKJ5sDpMJcr5OnUGGYvuO0sOToLAj9HKZ20Yw8seCHNdOAvqsGj8R8N zNYJjeoXPP/Dm5XzzmEcfaeKyoKGnmNpK3kqtXyCkrMfPzrM2AZL7Meei nVV5wLwRiHesPMdmtvJvVW1Gi0Nz5IgPRlyPG1XZqnGAdHdM3scq34Wuq EG9ZZ7VIKydzRu1M7wknhrEVLsO7Zv13n29MlLHrNoGXt7WC3m95BZTSZ j9TPFhiynFyoRa+SgteEjWUg+7BiRR8f+/I+D8l/Q9bgUwJZuCWJzR3pI oBMmQal+W7ez4ZGrYkPC1Yzx0zCm7nx7xWPuhg1D0NVeFAUeSGcEC07bG Q==; X-CSE-ConnectionGUID: v91pdsrZTy+Eihch/3pinQ== X-CSE-MsgGUID: Z5E84DaIQ0WyN2AStAto8Q== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="30689725" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="30689725" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Nov 2024 22:39:01 -0800 X-CSE-ConnectionGUID: OxDsKalzR/SUCZQoWpLyNQ== X-CSE-MsgGUID: PurmE+u2Sx2SqBVZbB/RpQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,259,1725346800"; d="scan'208";a="83989457" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by fmviesa009.fm.intel.com with ESMTP; 04 Nov 2024 22:38:57 -0800 From: Xiaoyao Li To: Paolo Bonzini , Riku Voipio , Richard Henderson , Zhao Liu , "Michael S. Tsirkin" , Marcel Apfelbaum , Igor Mammedov , Ani Sinha Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Yanan Wang , Cornelia Huck , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti , rick.p.edgecombe@intel.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, xiaoyao.li@intel.com Subject: [PATCH v6 37/60] i386/tdx: Set kvm_readonly_mem_enabled to false for TDX VM Date: Tue, 5 Nov 2024 01:23:45 -0500 Message-Id: <20241105062408.3533704-38-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241105062408.3533704-1-xiaoyao.li@intel.com> References: <20241105062408.3533704-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=198.175.65.18; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.34, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.781, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org TDX only supports readonly for shared memory but not for private memory. In the view of QEMU, it has no idea whether a memslot is used as shared memory of private. Thus just mark kvm_readonly_mem_enabled to false to TDX VM for simplicity. Signed-off-by: Xiaoyao Li Acked-by: Gerd Hoffmann --- target/i386/kvm/tdx.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index 19ce90df4143..00faffa891e4 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -372,6 +372,15 @@ static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp) return -EOPNOTSUPP; } + /* + * Set kvm_readonly_mem_allowed to false, because TDX only supports readonly + * memory for shared memory but not for private memory. Besides, whether a + * memslot is private or shared is not determined by QEMU. + * + * Thus, just mark readonly memory not supported for simplicity. + */ + kvm_readonly_mem_allowed = false; + qemu_add_machine_init_done_notifier(&tdx_machine_done_notify); tdx_guest = tdx;