From patchwork Wed Feb 26 18:14:35 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 13992930 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 06074239587 for ; Wed, 26 Feb 2025 18:15:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740593724; cv=none; b=groz7x19+b4dvOdb5i8BIQ8yGT8rd6+8eALUV83SW1BZwkH7guC51BcRFUKsDb/RGqzmpq2LNZOYqsISUtbxvHRT68cxI89u64ebx4Qll8Bh+YGyP/tZPG3K3Oly6FRe6OF6qZ3QskdkF5Z89N4MhnZm81lpA1kiBThh3meA5fc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740593724; c=relaxed/simple; bh=v0subQ8MusqLwWWiq2Tvid+nk8131GR+ABVVYMabaMw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=aXC+LJTXhZ5swh0bAL8SA2dtZoYvSd6khCS+CDzv4eb84ndJTrio/Qg/1XPcv9wLF6diZyvV1mWlfZ5J4i8Fw2TArzh69lUoqh7n5qmK8wnJclFX3Lvy6NbizJw6vpp8Pyl1MFrFMXgaM1qANVNGM3MkR9IRAilJ9GYvSPvKt6Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=IaDvjip/; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="IaDvjip/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1740593722; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+51pmgeX3nMzZAL2+xNl9GnVCY4okqQgdOCTryeUlqk=; b=IaDvjip/CdxmbwxdQI96IRhnS8f0noFZvg5xMClEIBtbH71aB7IOT9QCxWjzFYFM3Gohq6 6Gatea0jl1MQPSFFx1WaNkoMi0V89CmTwcJ39bShGV8IXUCeUqYyIPMdMWoU9vxpPyCz4F KACycFLweyI//PXMoMsqT2VkooKA1YY= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-639-qn1WYz4nMvigFoMVJSfzZw-1; Wed, 26 Feb 2025 13:15:20 -0500 X-MC-Unique: qn1WYz4nMvigFoMVJSfzZw-1 X-Mimecast-MFC-AGG-ID: qn1WYz4nMvigFoMVJSfzZw_1740593719 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 672E318D95F1; Wed, 26 Feb 2025 18:15:19 +0000 (UTC) Received: from virtlab1023.lab.eng.rdu2.redhat.com (virtlab1023.lab.eng.rdu2.redhat.com [10.8.1.187]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5194C1955BD4; Wed, 26 Feb 2025 18:15:18 +0000 (UTC) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: seanjc@google.com, Yan Zhao , Rick Edgecombe , Kai Huang Subject: [PATCH 16/33] KVM: TDX: Get TDX global information Date: Wed, 26 Feb 2025 13:14:35 -0500 Message-ID: <20250226181453.2311849-17-pbonzini@redhat.com> In-Reply-To: <20250226181453.2311849-1-pbonzini@redhat.com> References: <20250226181453.2311849-1-pbonzini@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 From: Kai Huang KVM will need to consult some essential TDX global information to create and run TDX guests. Get the global information after initializing TDX. Signed-off-by: Kai Huang Signed-off-by: Rick Edgecombe Message-ID: <20241030190039.77971-3-rick.p.edgecombe@intel.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx/tdx.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 3c089ed3b843..b74a50e8d086 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -13,6 +13,8 @@ module_param_named(tdx, enable_tdx, bool, 0444); static enum cpuhp_state tdx_cpuhp_state; +static const struct tdx_sys_info *tdx_sysinfo; + static int tdx_online_cpu(unsigned int cpu) { unsigned long flags; @@ -92,11 +94,20 @@ static int __init __tdx_bringup(void) if (r) goto tdx_bringup_err; + /* Get TDX global information for later use */ + tdx_sysinfo = tdx_get_sysinfo(); + if (WARN_ON_ONCE(!tdx_sysinfo)) { + r = -EINVAL; + goto get_sysinfo_err; + } + /* * Leave hardware virtualization enabled after TDX is enabled * successfully. TDX CPU hotplug depends on this. */ return 0; +get_sysinfo_err: + __tdx_cleanup(); tdx_bringup_err: kvm_disable_virtualization(); return r;