From patchwork Tue Nov 7 14:56:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isaku Yamahata X-Patchwork-Id: 13448981 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 D83C731A64 for ; Tue, 7 Nov 2023 15:01:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="J/hZKf3C" Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 20CC0132; Tue, 7 Nov 2023 06:58:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699369139; x=1730905139; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4SCW6Dkj/Vj+qX6sWycKS9/fk9MJ8AKVtZUkBL10lrs=; b=J/hZKf3Ct4O8Fu9vQb0uOoMYf/cq32CJsCvXOTGIcvP2+xHpsBFJvpZq +bCB4B7xj+2g2LoM5f/GsS+VvByeECKByeXmY4nYkM1RM3cdNQCoE9RIg ZTGzIFJKWwvuK+Ncyo8cFIjpzmnrkuj0r7X9evewQvHEtJ3Juu8BjQlfe GQ3ThM7Mx3w1h1aZRT10wq9EdxdHIIOuS680RPquWJ7Vqtd0EYstDq9qz 7x62uYe8pGIq92SGjxly9T1SQWX/kAClxGFtyfxYjw8h7h9Gb2e4yav3y J2Jrmua7iogIwiIXj6dusD2HJvWawamNdlJEnO6P2myveCdLw/MG4CdoE Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10887"; a="2462318" X-IronPort-AV: E=Sophos;i="6.03,284,1694761200"; d="scan'208";a="2462318" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2023 06:58:13 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.03,284,1694761200"; d="scan'208";a="10851391" Received: from ls.sc.intel.com (HELO localhost) ([172.25.112.31]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2023 06:58:12 -0800 From: isaku.yamahata@intel.com To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Paolo Bonzini , erdemaktas@google.com, Sean Christopherson , Sagi Shahar , David Matlack , Kai Huang , Zhi Wang , chen.bo@intel.com, hang.yuan@intel.com, tina.zhang@intel.com, Yan Zhao , Yuan Yao Subject: [PATCH v17 048/116] KVM: x86/mmu: TDX: Do not enable page track for TD guest Date: Tue, 7 Nov 2023 06:56:14 -0800 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Yan Zhao TDX does not support write protection and hence page track. Though !tdp_enabled and kvm_shadow_root_allocated(kvm) are always false for TD guest, should also return false when external write tracking is enabled. Cc: Yuan Yao Signed-off-by: Yan Zhao --- arch/x86/kvm/mmu/page_track.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/mmu/page_track.c b/arch/x86/kvm/mmu/page_track.c index c87da11f3a04..ce698ab213c1 100644 --- a/arch/x86/kvm/mmu/page_track.c +++ b/arch/x86/kvm/mmu/page_track.c @@ -22,6 +22,9 @@ bool kvm_page_track_write_tracking_enabled(struct kvm *kvm) { + if (kvm->arch.vm_type == KVM_X86_TDX_VM) + return false; + return IS_ENABLED(CONFIG_KVM_EXTERNAL_WRITE_TRACKING) || !tdp_enabled || kvm_shadow_root_allocated(kvm); }